NewDay Ltd

Senior Software Engineer page is loaded Senior Software Engineerlocations: Londontime type: Full timeposted on: Posted Todayjob requisition id: JR0572Job Advert Summary Mission Statement & Summary NewDay is one of the UK's leading digital consumer finance providers. We're on a mission to help people move forward with credit, supporting over 6 million customers every day! You may have heard of our own brand credit cards like Aqua, Marbles or Bip, or our co-branded retail credit cards with John Lewis & Partners, Argos and AO .As a Senior Software Engineer, you play a pivotal role in designing, developing, and maintaining high-quality software solutions. You collaborate closely with cross-functional teams, provide mentorship to other engineers, and contribute to the continuous improvement of engineering practices. Your expertise ensures the delivery of secure, reliable, and scalable products that align with business objectives. How you'll contribute You'll be part of the Engineering Excellence domain. We build the internal tools, services, and infrastructure that enable our engineering teams to ship safely and quickly. Hands-on programming work - coding, pair programming, mobbing, testing and shipping functionality. You will be acting as a technical lead and working with Principal Engineers and Lead Engineers to design, build and deliver platform capabilities for other teams to use. Leading complex features from conception to completion with high quality and minimal oversight. Mentoring less-experienced engineers and conducting thorough reviews of code and documentation. We're looking for these essential skills Writing and maintaining tests throughout the SDLC at all levels. Implementing continuous delivery practices to ship quality code safely and in a timely manner. Contributing to system architecture decisions, ensuring resiliency, scalability and maintainability. Thrives in autonomous, agile environments where innovation happens daily. AI-conscious - habitually using tools like Copilot, understanding their pros and cons, and able to guide others in safe, effective use. Strong communication skills - written and verbal. Clarity in documentation, proposals, and conversations. Able to surface the effects engineering decisions have across systems and push back against potential red flags. Enabler mindset - enjoys making other engineers happier through tooling, services and documentation. Honest, pragmatic, and open to feedback. Experience with observability, metrics, CI/CD, data analysis, or shared developer tooling. No on call required. Its a plus if you also have these skills Crafting modern .NET applications in C# and designing robust REST APIs Navigating Platform-as-a-Service (PaaS) cloud computing environments, we use Azure. .NET/C# or polyglot engineers with pragmatic system thinking - interested in abstracted system-level understanding over any specific tech stack. Contributing to engineering principles and technical direction across teams. Experience recruiting and onboarding engineers 26 days holiday, rising to 30 with service A holiday buy scheme (up to 5 extra days) Double matched pension, with up to 14% from NewDay Generous annual performance bonuses Private medical insurance with Bupa, including mental health support and cancer care 26 weeks paid maternity, adoption and shared parental leave Free breakfast and lunch in the office every day, provided by our in-house chefs and more, which you can explore ! NewDay, we value all types of diversity. We're an equal opportunity employer and believe that our differences create a vibrant, authentic working culture. We want all our colleagues to feel able to bring their whole selves to work. We don't discriminate on the basis of protected characteristics or identities. We make sure that every job is crafted to be inclusive and that people with disabilities or caring responsibilities can take part in the application and interview process.Tell us if you need accommodations: We'll put reasonable adjustments in place to support you.We work with Textio to make our job design and hiring inclusive.Permanent

A leading financial technology provider in Greater London is seeking a Senior Software Engineer. You will design and maintain software solutions, mentor junior engineers, and collaborate with teams to ensure high-quality code delivery. Essential skills include experience in test writing, continuous delivery, and strong communication. The role offers generous benefits including private medical insurance, performance bonuses, and a holiday buy scheme, along with a commitment to diversity and inclusion in the workplace.

Lead AI EngineerApplylocations: Londontime type: Full timeposted on: Posted 30+ Days Agojob requisition id: JR0140 Mission Statement & Summary We're hiring a Lead AI Engineer to own the design and delivery of AI systems across the business.This is a hands-on role focused on building production-grade solutions using LLMs and agentic systems, embedding AI directly into core business processes rather than building isolated prototypes. You'll take high-value problems and turn them into scalable, reliable systems used in real workflows, driving measurable business outcomes.You'll have ownership of technical direction, architecture, and implementation, translating defined business priorities into robust, production-ready systems. You'll make key technical decisions and work hands-on alongside engineers to deliver solutions that are reusable, scalable, and built for long-term impact. How You'll Contribute Own the technical direction, architecture, and implementation of AI systems end-to-end Design and build LLM-powered and agent-based solutions from concept to production Establish engineering standards, patterns, and reusable components across use cases Own key technical decisions on models, tooling, infrastructure, and system design Ensure systems are robust, observable, and production-ready (evaluation, monitoring, guardrails) Provide technical leadership and direction to engineers contributing to AI initiatives We're Looking For These Essential Skills Proven track record of owning the technical direction and delivery of production-grade AI systems end-to-end Experience designing and delivering complex AI systems across multiple use cases or domains Deep expertise in generative AI / LLMs, including orchestration, prompting, and evaluation Experience building agentic or multi-step AI systems Strong software engineering fundamentals including APIs, system design, and cloud-based architectures Ability to drive technical direction in ambiguous or fast-moving problem spaces Experience influencing engineering standards and practices across multiple projects Its a Plus If You Also Have These Skills Experience building AI platforms or reusable frameworks and patterns Familiarity with LLMOps / MLOps and production evaluation practice Experience embedding AI into core business processes or enterprise systems Experience working in large-scale or regulated enterprise environments What's in it for you? 26 days holiday, rising to 30 with service A holiday buy scheme (up to 5 extra days) Double matched pension, with up to 14% from NewDay Generous annual performance bonuses Private medical insurance with Bupa, including mental health support and cancer care 26 weeks paid maternity, adoption and shared parental leave Free breakfast and lunch in the office every day, provided by our in-house chefs and more, which you can explore here!At NewDay, we value all types of diversity. We're an equal opportunity employer and believe that our differences create a vibrant, authentic working culture. We want all our colleagues to feel able to bring their whole selves to work. We don't discriminate on the basis of protected characteristics or identities. We make sure that every job is crafted to be inclusive and that people with disabilities or caring responsibilities can take part in the application and interview process.Tell us if you need accommodations: We'll put reasonable adjustments in place to support you.We work with Textio to make our job design and hiring inclusive.Permanent

NewDay Ltd in Greater London is seeking a Lead AI Engineer to own the design and delivery of AI systems across the business. This role emphasizes hands-on development of scalable solutions using LLMs and agentic systems, transforming high-value problems into tools for real workflows. The ideal candidate will guide technical direction and implementation of production-grade AI solutions, working collaboratively with engineers to ensure robust outcomes that drive measurable business benefits.

Senior Software Engineer .NetApplylocations: Londontime type: Full timeposted on: Posted Todaytime left to apply: End Date: July 17, 2026 (28 days left to apply)job requisition id: JR0642As a Senior Software Engineer at NewDay, You'll design and deliver high-quality C#/.NET applications, create robust APIs, and contribute to event-driven architectures in a hands-on role at the core of our tech ecosystem.Working in a fast-paced, agile team, you'll take solutions from code to production and help evolve our Stratus platform-driving reuse, consistency and engineering excellence.Your impact: faster delivery, better performance, and scalable, future-ready systems that support NewDay's growth. How you'll contribute Collaborate with engineers to build and deliver new platform capabilities. Engage in hands-on programming, including coding, pair programming, and testing. Participate in regular scrum ceremonies, contributing to the agile development process. Work closely with the technical lead to build out Stratus Capabilities for other teams to leverage. Implement Continuous Delivery practices to ensure fast and high-quality code deployment. Leverage AI tools (e.g. GitHub Copilot) thoughtfully to improve efficiency and code quality Own what you build - overseeing the performance and resilience of our systems in production. Key Skills & Responsibilities Proficiency in crafting modern .NET applications using C# 12+ (including .NET 8+ and NuGet). Experience in crafting robust HTTP APIs with tools such as ASP.NET MVC, Web API, Carter, or Nancy. Experience navigating Platform-as-a-Service (PaaS) cloud environments. Proven experience with Event-Driven Architecture, designing systems that react in real-time. Experience building and maintaining CI/CD pipelines (e.g. GitHub Actions, Octopus) Ability to thrive in autonomous, agile environments where daily innovation is the norm. Preferred Skills and Experience Experience working with other technologies aside from .NET ( e.g. Java, Node) Proven experience working with Microsoft Azure Knowledge of Event-Sourced Systems, building architectures that track every state change. Experience working with distributed, scalable database solutions. Strong understanding of system design principles and modern engineering tooling. Familiarity with Event Sourced architectures. Your Impact By joining NewDay Cards Ltd, you will contribute significantly to delivering top-tier financial solutions. You will be involved in crafting the future of our technology stack and promoting success through collaboration and innovation. You will work on demanding projects that call for creativity and technical skill, keeping us competitive.Submit your application today to become a member of a team that recognizes your efforts and fosters your professional advancement. We look forward to discovering how you can contribute to accomplishing our ambitious aims and making a difference! NewDay, we value all types of diversity. We're an equal opportunity employer and believe that our differences create a vibrant, authentic working culture. We want all our colleagues to feel able to bring their whole selves to work. We don't discriminate on the basis of protected characteristics or identities. We make sure that every job is crafted to be inclusive and that people with disabilities or caring responsibilities can take part in the application and interview process.Tell us if you need accommodations: We'll put reasonable adjustments in place to support you.

NewDay Ltd in Greater London is looking for a Senior Software Engineer experienced in C#/.NET to design high-quality applications and collaborate in an agile team. You will enhance the Stratus platform and ensure robust performance. Your expertise in Event-Driven Architecture and CI/CD practices will drive innovation within our tech ecosystem. Join us to significantly impact our financial solutions while working in a supportive, diverse environment.

Senior Site Reliability EngineerApplylocations: Londontime type: Full timeposted on: Posted Todaytime left to apply: End Date: June 28, 2026 (12 days left to apply)job requisition id: JR0636 Mission Statement & Summary As a Senior Site Reliability Engineer, you'll sit at the intersection of software engineering and operations, driving reliability, performance, automation, and resilience across our technology estate.This is an opportunity to shape the future of our platform rather than simply maintain it. You'll work alongside talented engineers, influence technical direction, and champion modern reliability practices that enable teams to move faster with confidence. If you're passionate about solving complex problems, eliminating toil through automation, and creating systems that are resilient by design, we'd love to hear from you. How you'll contribute Lead initiatives that improve platform reliability, scalability, and operational excellence. Design and deliver automation solutions that reduce manual effort and accelerate engineering teams. Develop observability capabilities, enabling proactive monitoring and faster incident resolution. You will facilitate incident management, driving root cause analysis and continuous improvement. You'll collaborate with engineering teams to embed reliability, resilience, and performance into every stage of delivery. We're looking for these essential skills Software engineering and design experience (preferably .net/C#), to build and improve production systems, apply solid design principles, and contribute directly to codebases to deliver reliable, scalable, and maintainable services. The ability to automate infrastructure, operational processes, and deployments using modern engineering practices. Experience building effective observability solutions, including monitoring, logging, alerting, and tracing. Strong problem-solving skills with the ability to diagnose and resolve complex production issues. The ability to influence technical decisions and collaborate effectively across engineering and business teams. It's a plus if you also have these skills Experience operating Kubernetes-based platforms at scale. Knowledge of Infrastructure as Code tools and cloud platform services. Experience implementing Site Reliability Engineering principles, including SLOs, SLIs, and error budgets. Familiarity with security, compliance, and resilience best practices within cloud environments. Experience mentoring engineers and helping teams adopt modern operational and reliability practices.At NewDay, we value all types of diversity. We're an equal opportunity employer and believe that our differences create a vibrant, authentic working culture. We want all our colleagues to feel able to bring their whole selves to work. We don't discriminate on the basis of protected characteristics or identities. We make sure that every job is crafted to be inclusive and that people with disabilities or caring responsibilities can take part in the application and interview process.Tell us if you need accommodations: We'll put reasonable adjustments in place to support you.We work with Textio to make our job design and hiring inclusive.PermanentSenior SRE role profile.docx

Lead ML EngineerApplylocations: Londontime type: Full timeposted on: Posted 11 Days Agotime left to apply: End Date: May 22, 2026 (5 days left to apply)job requisition id: JR0477Are you ready to define how machine learning systems are delivered, operated, and scaled across a data driven organisation? NewDay are looking for aLead ML Engineer to set the standards, patterns, and technical foundations that define how machine learning models are delivered and operated in production. Why this role matters As the technical lead within our MLOps function, you will shape how ML is engineered in practice. This role will focus on establishing the standards, patterns, and technical approaches that enable models to move reliably from experimentation into robust production.You will shape how ML systems are engineered in practice through clear lifecycle standards, reusable approaches, and strong technical foundations. How you'll contribute Establish standard, reusable patterns for model serving, pipelines, and deployment. Define standards for model packaging, versioning, CI/CD, monitoring and observability. Set clear production readiness criteria for models entering engineering workflows. Provide technical direction for ML solutions delivered within the team. Evolve platform capabilities that reduce bespoke approaches over time. Reduce engineering effort required to productionise models by establishing reusable approaches and platform capabilities. We're looking for these essential skills Experience building and operating ML systems in production, including model serving, monitoring, and lifecycle management. Strong understanding of serving patterns across batch and real time environments, and how models move from training to production. Experience defining engineering approaches that enable Data Science teams to deliver reliable, production ready models. Ability to turn ambiguity into clear, adoptable technical standards and reusable patterns. Experience setting technical direction and influencing engineering practices across teams. Hands on experience with cloud ML platforms (e.g., AWS SageMaker) and orchestration tools (e.g., Airflow, Step Functions) Strong communication skills and the ability to collaborate across Data Science, Engineering, and Data Platforms. How you work You are comfortable operating at the boundary between experimentation and production grade ML delivery. You value structure, consistency, and high standards in engineering practices. You think in terms of reusable frameworks rather than one off solutions. You are motivated by improving reliability and long term maintainability of ML systems. You bring clarity, direction, and technical leadership to complex problem spaces. NewDay, we value all types of diversity. We're an equal opportunity employer and believe that our differences create a vibrant, authentic working culture. We want all our colleagues to feel able to bring their whole selves to work. We don't discriminate on the basis of protected characteristics or identities. We make sure that every job is crafted to be inclusive and that people with disabilities or caring responsibilities can take part in the application and interview process.Tell us if you need accommodations: We'll put reasonable adjustments in place to support you.We work with Textio to make our job design and hiring inclusive.Permanent

Senior AI Engineer page is loaded Senior AI Engineerlocations: Londontime type: Full timeposted on: Posted Todayjob requisition id: JR0573 Mission Statement & Summary We're hiring a Senior AI Engineer to design and deliver AI systems across the business.This is a hands-on role focused on building production-grade solutions using LLMs and agentic systems, embedding AI directly into core business processes rather than building isolated prototypes. You'll take high-value problems and turn them into scalable, reliable systems used in real workflows, driving measurable business outcomes.You'll contribute significantly to technical direction, architecture, and implementation, translating defined business priorities into robust, production-ready systems. You'll make key technical contributions and work hands-on alongside engineers to deliver solutions that are reusable, scalable, and built for long-term impact. How You'll Contribute Design and implement AI systems end-to-end, contributing to technical direction and architecture Build LLM-powered and agent-based solutions from concept through to production Contribute to engineering standards, patterns, and reusable components across use cases Make informed technical decisions on models, tooling, infrastructure, and system design within agreed architectural direction Ensure systems are robust, observable, and production-ready (evaluation, monitoring, guardrails) Provide technical guidance and mentorship to engineers contributing to AI initiatives We're Looking For These Essential Skills Proven experience delivering production-grade AI systems end-to-end Experience designing and implementing complex AI systems across multiple use cases or domains Strong expertise in generative AI / LLMs, including orchestration, prompting, and evaluation Experience building agentic or multi-step AI systems Strong software engineering fundamentals including APIs, system design, and cloud-based architectures Ability to operate effectively in ambiguous or fast-moving problem spaces Experience contributing to and influencing engineering standards and practices across projects It's a plus if you also have these skills Experience contributing to AI platforms or reusable frameworks and patterns Familiarity with LLMOps / MLOps and production evaluation practices Experience embedding AI into core business processes or enterprise systems Experience working in large-scale or regulated enterprise environments 26 days holiday, rising to 30 with service A holiday buy scheme (up to 5 extra days) Double matched pension, with up to 14% from NewDay Generous annual performance bonuses Private medical insurance with Bupa, including mental health support and cancer care 26 weeks paid maternity, adoption and shared parental leave Free breakfast and lunch in the office every day, provided by our in-house chefs and more, which you can explore !At NewDay, we value all types of diversity. We're an equal opportunity employer and believe that our differences create a vibrant, authentic working culture. We want all our colleagues to feel able to bring their whole selves to work. We don't discriminate on the basis of protected characteristics or identities. We make sure that every job is crafted to be inclusive and that people with disabilities or caring responsibilities can take part in the application and interview process.Tell us if you need accommodations: We'll put reasonable adjustments in place to support you.We work with Textio to make our job design and hiring inclusive.Permanent

A financial services company in Greater London is seeking a Senior AI Engineer to design and deliver AI systems integral to their business processes. This hands-on role involves building production-grade solutions utilizing LLMs and agentic systems, contributing significantly to the technical direction and architecture. Applicants should have proven experience in delivering AI systems end-to-end and a strong grounding in software engineering principles. The company offers a range of employee perks, including a generous holiday policy and private medical insurance.