Business engagement & transformation- Support Contract Type: Inside IR35 Duration: Until 31/03/2027 (likely to be extended) Location: London (Hybrid 1x month onsite) Pay Rate: Max 700 Start Date: ASAP Background Checks: BPSS Hours: 40 Job Overview: We are looking for a proactive and organised individual to support Digital Communications & Engagement, stakeholder coordination, DigitalHub (SharePoint) and the rollout of an outcome-led Digital Performance Management Framework. The role will help improve how Digital engages with colleagues, shares information, tracks delivery and uses performance insights to support evidence-based decision-making and continuous improvement. Your Responsibilities: Digital Communications & Engagement: Draft and publish newsletters, announcements, updates and roadshow materials. Support C&E plans, including audience mapping, messaging, channel selection and engagement journeys. Stakeholder Engagement: Coordinate inputs from Heads of Function, SMEs and key stakeholders, and support workshops, working groups and action tracking. DigitalHub & Governance: Develop and maintain SharePoint pages and content, ensuring information is accurate, accessible and user-friendly. Maintain content ownership, review dates, templates and publishing workflows. Delivery Planning: Coordinate and track Digital C&E, WS2 and WS3 delivery plans, including milestones, dependencies, deliverables and stakeholder actions. Performance Management & Reporting: Support the development and documentation of the Digital Performance Management Framework, including performance domains, outcomes, KPIs, definitions, ownership and reporting cadence. Dashboards & Performance Reviews: Support reporting templates, dashboards and monthly or quarterly reviews covering delivery effectiveness, customer experience and organisational health. Track actions and support continuous improvement. Change & Adoption: Support the rollout and adoption of DigitalHub and the Performance Management Framework through communications, onboarding, feedback and usage analytics. What We're Looking For: Strong written and verbal communication skills. Stakeholder management and coordination. Excellent planning, organisation and attention to detail. Analytical thinking and problem-solving. Ability to manage competing priorities, track actions and meet deadlines. A collaborative, proactive approach with a focus on governance, adoption and continuous improvement. Experience/Qualifications Required: A relevant qualification in Communications, Business Management, Information Systems, Project Management or a related field, or equivalent experience. Experience in communications, stakeholder engagement, project coordination, content management or performance reporting. Working knowledge of Microsoft 365, particularly SharePoint, Excel, PowerPoint and Teams. Exposure to KPIs, dashboards, data analysis, governance or change and adoption initiatives would be advantageous. Company information: This contract vacancy is being advertised by Rullion Ltd Since 1978, Rullion has been securing exceptional candidates for a range of clients; from large well-known brands to SMEs and start-ups. As a family-owned business, Rullion's approach is credible and honest, focused on building long-lasting relationships with both clients and candidates. Rullion is a forward-thinking recruitment company that specialises in providing a wide range of talent consultancy services to a diverse client base; from small start-ups to large household names. We celebrate and support diversity and are committed to ensuring equal opportunities for both employees and applicants. INDCF-PM Rullion celebrates and supports diversity and is committed to ensuring equal opportunities for both employees and applicants.
21/10/2026
Contractor
Business engagement & transformation- Support Contract Type: Inside IR35 Duration: Until 31/03/2027 (likely to be extended) Location: London (Hybrid 1x month onsite) Pay Rate: Max 700 Start Date: ASAP Background Checks: BPSS Hours: 40 Job Overview: We are looking for a proactive and organised individual to support Digital Communications & Engagement, stakeholder coordination, DigitalHub (SharePoint) and the rollout of an outcome-led Digital Performance Management Framework. The role will help improve how Digital engages with colleagues, shares information, tracks delivery and uses performance insights to support evidence-based decision-making and continuous improvement. Your Responsibilities: Digital Communications & Engagement: Draft and publish newsletters, announcements, updates and roadshow materials. Support C&E plans, including audience mapping, messaging, channel selection and engagement journeys. Stakeholder Engagement: Coordinate inputs from Heads of Function, SMEs and key stakeholders, and support workshops, working groups and action tracking. DigitalHub & Governance: Develop and maintain SharePoint pages and content, ensuring information is accurate, accessible and user-friendly. Maintain content ownership, review dates, templates and publishing workflows. Delivery Planning: Coordinate and track Digital C&E, WS2 and WS3 delivery plans, including milestones, dependencies, deliverables and stakeholder actions. Performance Management & Reporting: Support the development and documentation of the Digital Performance Management Framework, including performance domains, outcomes, KPIs, definitions, ownership and reporting cadence. Dashboards & Performance Reviews: Support reporting templates, dashboards and monthly or quarterly reviews covering delivery effectiveness, customer experience and organisational health. Track actions and support continuous improvement. Change & Adoption: Support the rollout and adoption of DigitalHub and the Performance Management Framework through communications, onboarding, feedback and usage analytics. What We're Looking For: Strong written and verbal communication skills. Stakeholder management and coordination. Excellent planning, organisation and attention to detail. Analytical thinking and problem-solving. Ability to manage competing priorities, track actions and meet deadlines. A collaborative, proactive approach with a focus on governance, adoption and continuous improvement. Experience/Qualifications Required: A relevant qualification in Communications, Business Management, Information Systems, Project Management or a related field, or equivalent experience. Experience in communications, stakeholder engagement, project coordination, content management or performance reporting. Working knowledge of Microsoft 365, particularly SharePoint, Excel, PowerPoint and Teams. Exposure to KPIs, dashboards, data analysis, governance or change and adoption initiatives would be advantageous. Company information: This contract vacancy is being advertised by Rullion Ltd Since 1978, Rullion has been securing exceptional candidates for a range of clients; from large well-known brands to SMEs and start-ups. As a family-owned business, Rullion's approach is credible and honest, focused on building long-lasting relationships with both clients and candidates. Rullion is a forward-thinking recruitment company that specialises in providing a wide range of talent consultancy services to a diverse client base; from small start-ups to large household names. We celebrate and support diversity and are committed to ensuring equal opportunities for both employees and applicants. INDCF-PM Rullion celebrates and supports diversity and is committed to ensuring equal opportunities for both employees and applicants.
Job Title: SAP S4E Data Migration Manager Location: Lincoln, UK (with some international travel) LN6 3AD Hours: 37.5 hours/week (7.5 hours/day) Start Date: 30/11/2026 Duration: 6-month rolling contract Pay Rate: 450/day + travel expenses when required IR35 Status: Outside IR35 (Hiring Manager to action role assessment) Required Skills & Experience SAP data cleansing, closing, and migration experience (SAP ECC6 to S4Hana) Proven track record on large SAP implementation projects Experience working within multinational and multicultural teams Main Tasks & Responsibilities Responsible for the successful execution of data migration within the respective cluster. Accountable for setting data object scope, ownership, source system, and data migration strategy for the cluster. Data Migration Project Plan & Scope: Develop a detailed project plan including all data migration activities for the SGT rollout cluster. Conduct a comprehensive assessment of existing data to determine scope and requirements for local migration. Collaborate with Cross-Functions Master Data Governance, Data Migration Factory, and local Data Stewards to ensure alignment and readiness. Data Migration Preparation: Oversee data cleansing and enrichment activities at the cluster level to ensure accuracy and completeness. Validate migration tools, infrastructure, DMIG strategy, and DOMs. Data Migration Execution: Lead the execution of Data Extraction, Transformation, and Loading (ETL) processes. Continuously monitor migration activities to maintain data quality standards. Address and resolve any issues or errors during the migration process to ensure minimal disruption. Drive rigorous testing and validation of migrated data to confirm accuracy in the new system environment. Maintain thorough documentation of the migration process to meet compliance and audit standards. Please note Should your application be successful, and you are offered the role, a number of pre-employment checks need to be carried out before your appointment can be confirmed. Any assignment offer with our client will be subject to a satisfactory checking report from the Disclosure Barring Service. This vacancy is being advertised by Rullion Ltd acting as an employment business. Since 1978, Rullion has been securing exceptional candidates for a range of clients; from large well-known brands, to SMEs and start-ups. As a family-owned business, Rullion's approach is credible and honest, focused on building long-lasting relationships with both clients and candidates. We celebrate and support diversity and are committed to ensuring equal opportunities for both employees and applicants. Rullion celebrates and supports diversity and is committed to ensuring equal opportunities for both employees and applicants.
16/10/2026
Contractor
Job Title: SAP S4E Data Migration Manager Location: Lincoln, UK (with some international travel) LN6 3AD Hours: 37.5 hours/week (7.5 hours/day) Start Date: 30/11/2026 Duration: 6-month rolling contract Pay Rate: 450/day + travel expenses when required IR35 Status: Outside IR35 (Hiring Manager to action role assessment) Required Skills & Experience SAP data cleansing, closing, and migration experience (SAP ECC6 to S4Hana) Proven track record on large SAP implementation projects Experience working within multinational and multicultural teams Main Tasks & Responsibilities Responsible for the successful execution of data migration within the respective cluster. Accountable for setting data object scope, ownership, source system, and data migration strategy for the cluster. Data Migration Project Plan & Scope: Develop a detailed project plan including all data migration activities for the SGT rollout cluster. Conduct a comprehensive assessment of existing data to determine scope and requirements for local migration. Collaborate with Cross-Functions Master Data Governance, Data Migration Factory, and local Data Stewards to ensure alignment and readiness. Data Migration Preparation: Oversee data cleansing and enrichment activities at the cluster level to ensure accuracy and completeness. Validate migration tools, infrastructure, DMIG strategy, and DOMs. Data Migration Execution: Lead the execution of Data Extraction, Transformation, and Loading (ETL) processes. Continuously monitor migration activities to maintain data quality standards. Address and resolve any issues or errors during the migration process to ensure minimal disruption. Drive rigorous testing and validation of migrated data to confirm accuracy in the new system environment. Maintain thorough documentation of the migration process to meet compliance and audit standards. Please note Should your application be successful, and you are offered the role, a number of pre-employment checks need to be carried out before your appointment can be confirmed. Any assignment offer with our client will be subject to a satisfactory checking report from the Disclosure Barring Service. This vacancy is being advertised by Rullion Ltd acting as an employment business. Since 1978, Rullion has been securing exceptional candidates for a range of clients; from large well-known brands, to SMEs and start-ups. As a family-owned business, Rullion's approach is credible and honest, focused on building long-lasting relationships with both clients and candidates. We celebrate and support diversity and are committed to ensuring equal opportunities for both employees and applicants. Rullion celebrates and supports diversity and is committed to ensuring equal opportunities for both employees and applicants.
Technical Architect Location: London - 2-3 days per week on-site Working Hours: 40 hours per week Contract Duration: 6-12 months Contract Type: Inside IR35 Maximum Day Rate: 700 Role Overview Our client is seeking an experienced Technical Architect to lead the design and assurance of complex IT solutions within a large-scale, regulated environment. The role will ensure solutions are secure, scalable, resilient and aligned with enterprise architecture standards, working closely with internal stakeholders and multiple suppliers to maintain technical quality and delivery excellence. Key Responsibilities Lead the design and assurance of technical solutions, ensuring alignment with enterprise architecture standards and regulatory requirements. Provide architectural oversight throughout the project lifecycle, from initial design through to operational handover. Design and review architectures across cloud platforms, infrastructure, networks, integration services and applications. Collaborate with business and IT stakeholders to translate requirements into robust, scalable and sustainable technical solutions. Provide technical leadership and subject matter expertise to project teams and third-party suppliers. Support architectural governance, including participation in Architecture Review Boards (ARBs) where required. Evaluate emerging technologies and recommend solutions that support business objectives and technology strategy. Ensure effective integration and interoperability across complex, multi-supplier delivery environments. Embed cyber security requirements into technical designs, ensuring compliance with relevant security frameworks. Identify and manage technical risks, escalating issues where necessary to support successful delivery. Knowledge, Skills and Experience Essential Skills Strong expertise in enterprise-scale technical architecture, including cloud, infrastructure, networking and integration. Proven ability to design and assure secure, scalable, resilient and cost-effective technical solutions. Excellent communication and stakeholder management skills, with the ability to influence both technical and non-technical audiences. Understanding of cyber security principles and requirements within regulated environments. Experience working across complex, large-scale, multi-supplier delivery environments. Essential Experience Extensive experience in Technical Architecture roles within large-scale, complex or regulated organisations. A proven track record of providing architectural assurance and technical oversight for supplier-delivered solutions. Experience ensuring technical designs meet enterprise standards, security requirements and operational expectations. Current Security Check (SC) clearance or willingness to undergo the required security vetting. Desirable Skills and Experience Experience in the nuclear, energy or another highly regulated sector. Knowledge of enterprise architecture frameworks and digital transformation best practices. Familiarity with large-scale infrastructure and digital programmes within complex organisations. Professional certifications such as TOGAF, ITIL or cloud certifications across AWS, Microsoft Azure or Google Cloud Platform. What We're Looking For We are looking for a technically strong and commercially aware Technical Architect who can provide clear architectural direction, challenge supplier designs where necessary, and ensure solutions meet high standards of security, resilience and quality. The successful candidate will be comfortable operating in a complex delivery environment and influencing stakeholders at all levels. INDCF-RE Rullion celebrates and supports diversity and is committed to ensuring equal opportunities for both employees and applicants.
15/10/2026
Contractor
Technical Architect Location: London - 2-3 days per week on-site Working Hours: 40 hours per week Contract Duration: 6-12 months Contract Type: Inside IR35 Maximum Day Rate: 700 Role Overview Our client is seeking an experienced Technical Architect to lead the design and assurance of complex IT solutions within a large-scale, regulated environment. The role will ensure solutions are secure, scalable, resilient and aligned with enterprise architecture standards, working closely with internal stakeholders and multiple suppliers to maintain technical quality and delivery excellence. Key Responsibilities Lead the design and assurance of technical solutions, ensuring alignment with enterprise architecture standards and regulatory requirements. Provide architectural oversight throughout the project lifecycle, from initial design through to operational handover. Design and review architectures across cloud platforms, infrastructure, networks, integration services and applications. Collaborate with business and IT stakeholders to translate requirements into robust, scalable and sustainable technical solutions. Provide technical leadership and subject matter expertise to project teams and third-party suppliers. Support architectural governance, including participation in Architecture Review Boards (ARBs) where required. Evaluate emerging technologies and recommend solutions that support business objectives and technology strategy. Ensure effective integration and interoperability across complex, multi-supplier delivery environments. Embed cyber security requirements into technical designs, ensuring compliance with relevant security frameworks. Identify and manage technical risks, escalating issues where necessary to support successful delivery. Knowledge, Skills and Experience Essential Skills Strong expertise in enterprise-scale technical architecture, including cloud, infrastructure, networking and integration. Proven ability to design and assure secure, scalable, resilient and cost-effective technical solutions. Excellent communication and stakeholder management skills, with the ability to influence both technical and non-technical audiences. Understanding of cyber security principles and requirements within regulated environments. Experience working across complex, large-scale, multi-supplier delivery environments. Essential Experience Extensive experience in Technical Architecture roles within large-scale, complex or regulated organisations. A proven track record of providing architectural assurance and technical oversight for supplier-delivered solutions. Experience ensuring technical designs meet enterprise standards, security requirements and operational expectations. Current Security Check (SC) clearance or willingness to undergo the required security vetting. Desirable Skills and Experience Experience in the nuclear, energy or another highly regulated sector. Knowledge of enterprise architecture frameworks and digital transformation best practices. Familiarity with large-scale infrastructure and digital programmes within complex organisations. Professional certifications such as TOGAF, ITIL or cloud certifications across AWS, Microsoft Azure or Google Cloud Platform. What We're Looking For We are looking for a technically strong and commercially aware Technical Architect who can provide clear architectural direction, challenge supplier designs where necessary, and ensure solutions meet high standards of security, resilience and quality. The successful candidate will be comfortable operating in a complex delivery environment and influencing stakeholders at all levels. INDCF-RE Rullion celebrates and supports diversity and is committed to ensuring equal opportunities for both employees and applicants.
Role : Solution Architect ( infrastructure) Location: Leiston, Hybrid, 3 days per week onsite Employment Type: 12 Months Working Hours : 40 hours a week Contract Type: inside IR35. Max Charge Rate: 740 per day Experience: Experience coordinating complex infrastructure, facilities, telecommunications, networking, or connectivity projects Experience with physical hardware fit design, planning, procurement, and installation for the above activities Experience working on large site mobilisation programmes Experience working alongside: Facilities Management teams Site Operations teams Construction delivery teams Network and telecommunications engineers Infrastructure or IT operations teams Internet, and Telephony Service providers and contractors Profile: Highly organised and proactive. Comfortable working on a live construction site. Strong at coordinating people and analysing requirements. Confident challenging suppliers and driving actions to completion. Able to build relationships quickly across operational and technical teams. Pragmatic, delivery-focused and comfortable dealing with ambiguity. Key Responsibilities: Coordinate site connectivity initiatives across multiple construction and operational workstreams. Act as the primary interface between site operations, Digital & IT, suppliers and programme delivery teams. Support the mobilisation of connectivity services into new buildings, compounds and operational areas. Engage with facilities, construction, logistics and contractor teams to understand site requirements and constraints. Ensure appropriate governance, assurance and approval activities are completed. Support investment cases, project documentation and programme reporting where required. Coordinate supplier activities and ensure delivery commitments are understood and tracked. Escalate blockers and delivery risks proactively. Maintain stakeholder alignment across operational and project teams. Support operational transition and handover activities for connectivity services INDCF-RE Rullion celebrates and supports diversity and is committed to ensuring equal opportunities for both employees and applicants.
14/10/2026
Contractor
Role : Solution Architect ( infrastructure) Location: Leiston, Hybrid, 3 days per week onsite Employment Type: 12 Months Working Hours : 40 hours a week Contract Type: inside IR35. Max Charge Rate: 740 per day Experience: Experience coordinating complex infrastructure, facilities, telecommunications, networking, or connectivity projects Experience with physical hardware fit design, planning, procurement, and installation for the above activities Experience working on large site mobilisation programmes Experience working alongside: Facilities Management teams Site Operations teams Construction delivery teams Network and telecommunications engineers Infrastructure or IT operations teams Internet, and Telephony Service providers and contractors Profile: Highly organised and proactive. Comfortable working on a live construction site. Strong at coordinating people and analysing requirements. Confident challenging suppliers and driving actions to completion. Able to build relationships quickly across operational and technical teams. Pragmatic, delivery-focused and comfortable dealing with ambiguity. Key Responsibilities: Coordinate site connectivity initiatives across multiple construction and operational workstreams. Act as the primary interface between site operations, Digital & IT, suppliers and programme delivery teams. Support the mobilisation of connectivity services into new buildings, compounds and operational areas. Engage with facilities, construction, logistics and contractor teams to understand site requirements and constraints. Ensure appropriate governance, assurance and approval activities are completed. Support investment cases, project documentation and programme reporting where required. Coordinate supplier activities and ensure delivery commitments are understood and tracked. Escalate blockers and delivery risks proactively. Maintain stakeholder alignment across operational and project teams. Support operational transition and handover activities for connectivity services INDCF-RE Rullion celebrates and supports diversity and is committed to ensuring equal opportunities for both employees and applicants.
Senior Frontend Developer (Contract) Overview We are looking for a talented Senior Frontend Developer to join a high-performing engineering team working on business-critical customer and colleague applications. This is an opportunity to contribute to modern web applications, deliver impactful features, and help drive the evolution of frontend platforms in a collaborative and fast-paced environment. You'll work closely with designers, backend engineers, product teams, and platform specialists to build scalable, maintainable, and high-quality solutions using modern frontend technologies. Contract Details Role: Senior Frontend Developer Contract Type: Inside IR35 Start Date: ASAP (flexible for the right candidate) Duration: Until the end of 2026 with potential extension Rate: Up to 650 per day Working Pattern: Hybrid - 1 day per week on-site in London (Thursdays) Hours: 40 hours per week The Role You will primarily work on an established telephony platform used by customer-facing teams to manage inbound and outbound communications. The role involves delivering new features, supporting existing functionality, and helping modernise frontend systems as part of ongoing platform transformation projects. Responsibilities include: Taking ownership of frontend feature delivery from design through to production Building and maintaining React and Next.js applications Developing clean, scalable, and well-tested TypeScript code Supporting the migration and modernisation of existing frontend platforms Working with shared component libraries and design systems Debugging production issues and improving application performance Contributing to CI/CD processes and deployment pipelines Participating in code reviews and mentoring less experienced developers Collaborating with Product, Design, Backend and Platform teams Making pragmatic technical decisions that balance delivery, quality, and maintainability Technology Stack React Next.js (App Router) TypeScript Tailwind CSS Component Design Systems Playwright Jest Vitest Git-based CI/CD pipelines Monitoring and observability tools Cloud-based infrastructure environments Essential Skills & Experience Strong commercial experience with React Proven expertise with Next.js Advanced TypeScript development experience Senior-level frontend engineering experience Experience working within large-scale frontend applications Strong testing background using tools such as Playwright , Jest , and Vitest Ability to work independently while collaborating effectively within agile squads Experience troubleshooting and resolving production issues Excellent communication and stakeholder management skills Desirable Experience Experience with telephony or contact-centre applications Knowledge of Twilio integrations Experience working with design systems and component libraries Exposure to cloud-native environments and modern DevOps practices Previous experience mentoring developers and supporting technical growth within teams What We're Looking For We're seeking a senior engineer who enjoys solving complex frontend challenges, delivering high-quality customer-focused solutions, and working within a collaborative engineering culture. You'll be comfortable owning features end-to-end, contributing to technical discussions, and helping shape the future direction of modern web applications. This role would suit someone who combines strong technical expertise with a practical, delivery-focused mindset and a passion for building exceptional user experiences. Rullion celebrates and supports diversity and is committed to ensuring equal opportunities for both employees and applicants.
08/10/2026
Contractor
Senior Frontend Developer (Contract) Overview We are looking for a talented Senior Frontend Developer to join a high-performing engineering team working on business-critical customer and colleague applications. This is an opportunity to contribute to modern web applications, deliver impactful features, and help drive the evolution of frontend platforms in a collaborative and fast-paced environment. You'll work closely with designers, backend engineers, product teams, and platform specialists to build scalable, maintainable, and high-quality solutions using modern frontend technologies. Contract Details Role: Senior Frontend Developer Contract Type: Inside IR35 Start Date: ASAP (flexible for the right candidate) Duration: Until the end of 2026 with potential extension Rate: Up to 650 per day Working Pattern: Hybrid - 1 day per week on-site in London (Thursdays) Hours: 40 hours per week The Role You will primarily work on an established telephony platform used by customer-facing teams to manage inbound and outbound communications. The role involves delivering new features, supporting existing functionality, and helping modernise frontend systems as part of ongoing platform transformation projects. Responsibilities include: Taking ownership of frontend feature delivery from design through to production Building and maintaining React and Next.js applications Developing clean, scalable, and well-tested TypeScript code Supporting the migration and modernisation of existing frontend platforms Working with shared component libraries and design systems Debugging production issues and improving application performance Contributing to CI/CD processes and deployment pipelines Participating in code reviews and mentoring less experienced developers Collaborating with Product, Design, Backend and Platform teams Making pragmatic technical decisions that balance delivery, quality, and maintainability Technology Stack React Next.js (App Router) TypeScript Tailwind CSS Component Design Systems Playwright Jest Vitest Git-based CI/CD pipelines Monitoring and observability tools Cloud-based infrastructure environments Essential Skills & Experience Strong commercial experience with React Proven expertise with Next.js Advanced TypeScript development experience Senior-level frontend engineering experience Experience working within large-scale frontend applications Strong testing background using tools such as Playwright , Jest , and Vitest Ability to work independently while collaborating effectively within agile squads Experience troubleshooting and resolving production issues Excellent communication and stakeholder management skills Desirable Experience Experience with telephony or contact-centre applications Knowledge of Twilio integrations Experience working with design systems and component libraries Exposure to cloud-native environments and modern DevOps practices Previous experience mentoring developers and supporting technical growth within teams What We're Looking For We're seeking a senior engineer who enjoys solving complex frontend challenges, delivering high-quality customer-focused solutions, and working within a collaborative engineering culture. You'll be comfortable owning features end-to-end, contributing to technical discussions, and helping shape the future direction of modern web applications. This role would suit someone who combines strong technical expertise with a practical, delivery-focused mindset and a passion for building exceptional user experiences. Rullion celebrates and supports diversity and is committed to ensuring equal opportunities for both employees and applicants.
Senior Frontend Developer (React Native) 6 Month contract 40 hours per week Inside IR35 Hybrid 1 office day London Farringdon office address: 47-53 Charterhouse St, London, EC1M 6PB About the Role We are looking for a highly experienced Senior Frontend Engineer to join a fast-paced and innovative engineering environment, helping to build and scale next-generation digital products and customer experiences. This is an opportunity to work on complex, high-impact applications used by both customers and internal stakeholders, while influencing technical strategy and engineering best practices. As a senior member of the engineering team, you will take ownership of critical frontend systems, mentor engineers across multiple levels, and drive technical decisions that balance business value with long-term maintainability. Key Responsibilities Lead the planning and delivery of complex frontend projects, translating ambiguous requirements into clear technical solutions. Take end-to-end ownership of critical applications, ensuring reliability, scalability, performance, and maintainability. Drive technical decision-making and architecture discussions across the team. Balance short-term business priorities with long-term technical health and sustainability. Manage technical debt strategically and advocate for continuous improvement initiatives. Deliver high-quality, production-ready code that is secure, performant, maintainable, and well-tested. Lead incident management and troubleshooting activities, implementing preventative measures to improve platform stability. Design systems with strong observability, scalability, and operational resilience. Create and maintain technical documentation, runbooks, and operational processes. Mentor and support engineers through coaching, code reviews, and technical guidance. Required Skills & Experience Technical Skills Expert-level knowledge of React , TypeScript , and modern frontend architectures. Strong understanding of React internals, Server Components, and modern React frameworks including js . Deep expertise in state management and data-fetching patterns. Proven experience optimising frontend performance and improving Core Web Vitals. Strong testing background across unit, integration, and end-to-end testing frameworks. Knowledge of accessibility standards, including WCAG 2.1 AA . Experience implementing frontend security best practices Strong debugging and monitoring experience using observability tools. Experience designing and maintaining CI/CD pipelines and deployment processes. Understanding of build optimisation and module bundling techniques. Experience Minimum 5 years' commercial experience in frontend engineering or a similar software engineering role. Proven track record of delivering complex digital products within agile development environments. Desired Behaviours Strong ownership mentality and accountability for product and system performance. Ability to communicate complex technical concepts to both technical and non-technical stakeholders. Collaborative approach with experience influencing teams and driving consensus. Passion for mentoring and developing other engineers. Data-driven decision-making and a pragmatic approach to problem solving. Commitment to inclusive, high-performing team cultures. Technology Stack Frontend React js TypeScript React Native Flutter/Dart Gatsby State Management Redux Toolkit Zustand MobX TanStack React Query SWR Apollo Client UI & Design Systems Tailwind CSS Styled Components Material UI (MUI) Radix UI Framer Motion Custom Design Systems APIs & Data GraphQL REST APIs Contentful CMS React Hook Form Zod Testing Vitest Jest Testing Library Playwright Storybook MSW Axe / Pa11y DevOps & Infrastructure AWS Terraform GitLab CI Vercel OpenTelemetry Sentry New Relic Please note: Should your application be successful, and you are offered the role, a number of pre-employment checks need to be carried out before your appointment can be confirmed. Any assignment offer with our client will be subject to a satisfactory checking report from the Disclosure Barring Service. This vacancy is being advertised by Rullion Ltd acting as an employment business. Since 1978, Rullion has been securing exceptional candidates for a range of clients; from large well-known brands, to SMEs and start-ups. As a family-owned business, Rullion's approach is credible and honest, focused on building long-lasting relationships with both clients and candidates. We celebrate and support diversity and are committed to ensuring equal opportunities for both employees and applicants. Rullion celebrates and supports diversity and is committed to ensuring equal opportunities for both employees and applicants.
26/09/2026
Contractor
Senior Frontend Developer (React Native) 6 Month contract 40 hours per week Inside IR35 Hybrid 1 office day London Farringdon office address: 47-53 Charterhouse St, London, EC1M 6PB About the Role We are looking for a highly experienced Senior Frontend Engineer to join a fast-paced and innovative engineering environment, helping to build and scale next-generation digital products and customer experiences. This is an opportunity to work on complex, high-impact applications used by both customers and internal stakeholders, while influencing technical strategy and engineering best practices. As a senior member of the engineering team, you will take ownership of critical frontend systems, mentor engineers across multiple levels, and drive technical decisions that balance business value with long-term maintainability. Key Responsibilities Lead the planning and delivery of complex frontend projects, translating ambiguous requirements into clear technical solutions. Take end-to-end ownership of critical applications, ensuring reliability, scalability, performance, and maintainability. Drive technical decision-making and architecture discussions across the team. Balance short-term business priorities with long-term technical health and sustainability. Manage technical debt strategically and advocate for continuous improvement initiatives. Deliver high-quality, production-ready code that is secure, performant, maintainable, and well-tested. Lead incident management and troubleshooting activities, implementing preventative measures to improve platform stability. Design systems with strong observability, scalability, and operational resilience. Create and maintain technical documentation, runbooks, and operational processes. Mentor and support engineers through coaching, code reviews, and technical guidance. Required Skills & Experience Technical Skills Expert-level knowledge of React , TypeScript , and modern frontend architectures. Strong understanding of React internals, Server Components, and modern React frameworks including js . Deep expertise in state management and data-fetching patterns. Proven experience optimising frontend performance and improving Core Web Vitals. Strong testing background across unit, integration, and end-to-end testing frameworks. Knowledge of accessibility standards, including WCAG 2.1 AA . Experience implementing frontend security best practices Strong debugging and monitoring experience using observability tools. Experience designing and maintaining CI/CD pipelines and deployment processes. Understanding of build optimisation and module bundling techniques. Experience Minimum 5 years' commercial experience in frontend engineering or a similar software engineering role. Proven track record of delivering complex digital products within agile development environments. Desired Behaviours Strong ownership mentality and accountability for product and system performance. Ability to communicate complex technical concepts to both technical and non-technical stakeholders. Collaborative approach with experience influencing teams and driving consensus. Passion for mentoring and developing other engineers. Data-driven decision-making and a pragmatic approach to problem solving. Commitment to inclusive, high-performing team cultures. Technology Stack Frontend React js TypeScript React Native Flutter/Dart Gatsby State Management Redux Toolkit Zustand MobX TanStack React Query SWR Apollo Client UI & Design Systems Tailwind CSS Styled Components Material UI (MUI) Radix UI Framer Motion Custom Design Systems APIs & Data GraphQL REST APIs Contentful CMS React Hook Form Zod Testing Vitest Jest Testing Library Playwright Storybook MSW Axe / Pa11y DevOps & Infrastructure AWS Terraform GitLab CI Vercel OpenTelemetry Sentry New Relic Please note: Should your application be successful, and you are offered the role, a number of pre-employment checks need to be carried out before your appointment can be confirmed. Any assignment offer with our client will be subject to a satisfactory checking report from the Disclosure Barring Service. This vacancy is being advertised by Rullion Ltd acting as an employment business. Since 1978, Rullion has been securing exceptional candidates for a range of clients; from large well-known brands, to SMEs and start-ups. As a family-owned business, Rullion's approach is credible and honest, focused on building long-lasting relationships with both clients and candidates. We celebrate and support diversity and are committed to ensuring equal opportunities for both employees and applicants. Rullion celebrates and supports diversity and is committed to ensuring equal opportunities for both employees and applicants.
Senior Flutter Engineer Full-time Inside IR35 Hybrid 1 office day London Farringdon office address: 47-53 Charterhouse St, London, EC1M 6PB Join a dynamic energy provider dedicated to sustainable solutions in the UK. We are seeking an experienced Senior Flutter Engineer to join a fast-paced development team delivering high-quality mobile applications. You will play a key role in designing, developing, and maintaining cross-platform applications using Flutter, while contributing to architecture decisions, code quality, and engineering best practices. Initially it will be a six-month contract but there is potential for it to be extended. The role is Hybrid, with one day a week being based in their London. It is a full-time role, 37 hours per week. If this role feels right, send us your CV. Accountabilities: Design, develop, and maintain scalable Flutter applications for iOS and Android. Collaborate with Product Managers, UX/UI Designers, and Backend Engineers to deliver new features. Write clean, maintainable, and well-tested code. Lead technical discussions and provide guidance to other developers. Optimise application performance, reliability, and security. Participate in code reviews and champion engineering best practices. Integrate RESTful APIs and third-party services. Support CI/CD pipelines and automated testing processes. Opportunity to work on innovative mobile products. Collaborative and highly skilled engineering team. Knowledge and Skills: Extensive commercial experience developing mobile applications with Flutter and Dart. Strong understanding of mobile application architecture and design patterns. Experience integrating APIs and working with cloud-based services. Proven track record of delivering production-ready applications. Knowledge of state management solutions. Experience with Git, CI/CD pipelines, and automated testing. Strong problem-solving and stakeholder engagement skills. Experience mentoring developers and leading technical initiatives. Knowledge of native Android (Kotlin) or iOS (Swift) development. Previous experience working within Agile delivery teams. Please note: Should your application be successful, and you are offered the role, a number of pre-employment checks need to be carried out before your appointment can be confirmed. Any assignment offer with our client will be subject to a satisfactory checking report from the Disclosure Barring Service. This vacancy is being advertised by Rullion Ltd acting as an employment business. Since 1978, Rullion has been securing exceptional candidates for a range of clients; from large well-known brands, to SMEs and start-ups. As a family-owned business, Rullion's approach is credible and honest, focused on building long-lasting relationships with both clients and candidates. We celebrate and support diversity and are committed to ensuring equal opportunities for both employees and applicants. Rullion celebrates and supports diversity and is committed to ensuring equal opportunities for both employees and applicants.
25/09/2026
Contractor
Senior Flutter Engineer Full-time Inside IR35 Hybrid 1 office day London Farringdon office address: 47-53 Charterhouse St, London, EC1M 6PB Join a dynamic energy provider dedicated to sustainable solutions in the UK. We are seeking an experienced Senior Flutter Engineer to join a fast-paced development team delivering high-quality mobile applications. You will play a key role in designing, developing, and maintaining cross-platform applications using Flutter, while contributing to architecture decisions, code quality, and engineering best practices. Initially it will be a six-month contract but there is potential for it to be extended. The role is Hybrid, with one day a week being based in their London. It is a full-time role, 37 hours per week. If this role feels right, send us your CV. Accountabilities: Design, develop, and maintain scalable Flutter applications for iOS and Android. Collaborate with Product Managers, UX/UI Designers, and Backend Engineers to deliver new features. Write clean, maintainable, and well-tested code. Lead technical discussions and provide guidance to other developers. Optimise application performance, reliability, and security. Participate in code reviews and champion engineering best practices. Integrate RESTful APIs and third-party services. Support CI/CD pipelines and automated testing processes. Opportunity to work on innovative mobile products. Collaborative and highly skilled engineering team. Knowledge and Skills: Extensive commercial experience developing mobile applications with Flutter and Dart. Strong understanding of mobile application architecture and design patterns. Experience integrating APIs and working with cloud-based services. Proven track record of delivering production-ready applications. Knowledge of state management solutions. Experience with Git, CI/CD pipelines, and automated testing. Strong problem-solving and stakeholder engagement skills. Experience mentoring developers and leading technical initiatives. Knowledge of native Android (Kotlin) or iOS (Swift) development. Previous experience working within Agile delivery teams. Please note: Should your application be successful, and you are offered the role, a number of pre-employment checks need to be carried out before your appointment can be confirmed. Any assignment offer with our client will be subject to a satisfactory checking report from the Disclosure Barring Service. This vacancy is being advertised by Rullion Ltd acting as an employment business. Since 1978, Rullion has been securing exceptional candidates for a range of clients; from large well-known brands, to SMEs and start-ups. As a family-owned business, Rullion's approach is credible and honest, focused on building long-lasting relationships with both clients and candidates. We celebrate and support diversity and are committed to ensuring equal opportunities for both employees and applicants. Rullion celebrates and supports diversity and is committed to ensuring equal opportunities for both employees and applicants.
