Cosine
Job title: Founding Head of Public Sector Location: London; 4 days in-office, 1 day wfh Reports to: Chief Commercial Officer Cosine at a glance Cosine is the UK's frontier AI lab for autonomous software engineering - not another coding assistant, but our own models, agent stack, eval harnesses, and product layer. We build our agent tooling entirely in-house and post-train open-source models to deliver reliable, enterprise grade coding performance in security critical settings. Our offerings can be used as SaaS, deployed on VPC, on prem or fully air gapped. Through this flexability, we are able to service large scale, highly regulated enterprises and industries including defence, financial service and healthcare. We're backed by YC and were recently selected for the UK's sovereign AI programme. The company is at a rare stage: deep technical work, real enterprise pull, and a chance to shape how AI is deployed inside defence, banking, government, and other high trust environments. Mission Own Cosine's public sector engagement and GTM motion from founder led relationship building into a repeatable commercial engine. The role exists to build on Cosine's growing reputation across government, defence adjacent bodies, public sector technology teams, and the wider UK sovereign AI ecosystem, turning senior interest into deep institutional relationships, clearly understood priorities, and qualified commercial opportunities. This is a critical sector building role: part enterprise sales, part partnerships, part market development, part public sector navigation, and part GTM leadership. Core responsibilities 1. Lead engagement with public sector organisations and priority accounts Own Cosine's day to day engagement with priority public sector organisations, including central government departments, arm's length bodies, regulators, public agencies, national infrastructure bodies, and public sector technology teams. Build on Cosine's growing reputation in sovereign AI, secure deployment, and trusted AI engineering to create senior routes into the right organisations. Maintain a clear account map across key public sector organisations, including executive sponsors, digital and technology leaders, commercial/procurement stakeholders, policy teams, risk/security owners, and delivery teams. Move relationships from broad sovereign AI interest into specific, practical areas where Cosine can create value. 2. Build multi threaded senior relationships Develop relationships across multiple departments, divisions, seniority levels, and decision making layers in each target account. Engage CIO, CTO, CISO, CDIO, digital, data, engineering, architecture, commercial, procurement, transformation, policy, security, and operational stakeholders. Identify how priorities differ across teams, for example secure AI deployment, software assurance, legacy modernisation, operational resilience, cost reduction, productivity, national capability, procurement risk, and governance. Build enough trust that Cosine becomes part of the strategic conversation around sovereign AI adoption, not just another vendor responding to tenders. 3. Build Cosine's understanding of public sector sovereign AI priorities Run structured discovery across public sector organisations to understand what they truly care about in sovereign AI. Capture use cases, constraints, buying triggers, objections, governance requirements, security expectations, procurement routes, deployment models, and success metrics. Translate public sector customer signal into internal intelligence for sales, partnerships, product, research, engineering, marketing, and leadership. Build a sector view of where Cosine has the strongest right to win, including priority use cases, highest intent accounts, likely buyer personas, procurement routes, SI influence, and repeatable commercial narratives. Priority areas to explore include: Secure AI coding and software engineering inside sensitive or regulated public sector environments. AI adoption where source code, credentials, data, or infrastructure cannot leave the customer's control boundary. Legacy system modernisation and maintenance. Software assurance, auditability, testing, review, and governance. Productivity and resilience across public sector digital delivery teams. Deployment models across public cloud, customer VPC, on prem, secure environments, and air gapped environments where required. National capability, sovereign AI, and reducing dependency on foreign controlled AI infrastructure. 4. Build towards commercial opportunities Convert reputation, relationship building, and market education into qualified pipeline opportunities. Identify where there is a real public sector problem, accountable owner, budget route, technical champion, procurement path, and reason to act now. Shape opportunities into concrete next steps: workshops, technical deep dives, discovery sessions, pilots, proof of concepts, deployment planning, bid participation, or commercial proposals. Work with the wider GTM team to move qualified public sector opportunities through the sales cycle. Keep a clear view of account status, stakeholder map, open actions, risks, next steps, procurement routes, SI involvement, and commercial likelihood. The role should focus deeply on commercial pull: serious conversations, mapped accounts, live opportunities, pilots, bid routes, and ultimately revenue. 5. Work closely with systems integrators and delivery partners Work alongside Cosine's Head of Partnerships to build and manage relationships with the systems integrators, consultancies, and delivery partners that shape public sector buying. Identify where SIs can create routes into accounts, provide bid access, support delivery credibility, or help Cosine become part of larger transformation programmes. Build joint account plans with priority partners where there is a clear public sector opportunity. Support bid strategy, partner positioning, framework access, and teaming discussions where Cosine is best placed as a specialist sovereign AI or secure AI engineering partner. Ensure SI engagement is commercially purposeful, with clear ownership, target accounts, bid opportunities, and follow up actions. 6. Navigate public sector routes to market Build a clear view of the procurement and commercial routes that matter for Cosine in public sector. Understand where Cosine should pursue direct engagement, partner led opportunities, framework routes, innovation pathways, pilots, or inclusion in larger SI led bids. Help shape compliant engagement approaches that create trust without relying on frequent hosted events or activity that could create procurement issues. Use targeted briefings, structured discovery, partner conversations, written materials, and appropriate market engagement routes to progress opportunities. Work with legal, commercial, partnerships, and leadership to ensure public sector engagement is commercially useful and procurement aware. 7. Help build the GTM team in public sector Help define what the public sector GTM motion should become as Cosine scales. Build the early playbook for account selection, stakeholder mapping, discovery, qualification, partner led entry, SI engagement, bid strategy, pilot design, procurement navigation, and commercial progression. Help recruit, onboard, and develop future GTM hires focused on public sector. Establish the operating cadence for the sector: account reviews, pipeline tracking, partner follow up, bid tracking, customer insight capture, and internal reporting. Work closely with SDRs, partnerships, marketing, founders, enterprise sales, and the Head of Partnerships to make public sector a repeatable vertical. What good looks like in the first 6 months Multi threaded relationships established across the most important public sector accounts. The three top priority public sector accounts are established, with account maps, stakeholder coverage, routes to procurement, partner/SI strategy, and business cases set out. A structured view of public sector sovereign AI use cases, buyer priorities, objections, procurement routes, SI influence, and buying triggers. Qualified opportunities progressing into discovery, technical deep dives, pilots, bid discussions, partner motions, or commercial proposals. Clear working rhythm with the Head of Partnerships on SI engagement, bid routes, partner mapping, and public sector account strategy. A clear public sector GTM playbook that future hires can build from. Success metrics Relationship and market development Number of priority public sector accounts actively engaged. Number of senior stakeholder relationships built across target accounts. Number of multi threaded accounts with executive, technical, commercial, procurement, and partner coverage. Quality of customer insight captured on sovereign AI priorities, deployment requirements, procurement constraints, and use cases. Commercial progression Qualified public sector opportunities created. Workshops, technical deep dives, pilots, bid discussions, partner motions, or proposals initiated. Pipeline generated or influenced. . click apply for full job details
Job title: Founding Head of Public Sector Location: London; 4 days in-office, 1 day wfh Reports to: Chief Commercial Officer Cosine at a glance Cosine is the UK's frontier AI lab for autonomous software engineering - not another coding assistant, but our own models, agent stack, eval harnesses, and product layer. We build our agent tooling entirely in-house and post-train open-source models to deliver reliable, enterprise grade coding performance in security critical settings. Our offerings can be used as SaaS, deployed on VPC, on prem or fully air gapped. Through this flexability, we are able to service large scale, highly regulated enterprises and industries including defence, financial service and healthcare. We're backed by YC and were recently selected for the UK's sovereign AI programme. The company is at a rare stage: deep technical work, real enterprise pull, and a chance to shape how AI is deployed inside defence, banking, government, and other high trust environments. Mission Own Cosine's public sector engagement and GTM motion from founder led relationship building into a repeatable commercial engine. The role exists to build on Cosine's growing reputation across government, defence adjacent bodies, public sector technology teams, and the wider UK sovereign AI ecosystem, turning senior interest into deep institutional relationships, clearly understood priorities, and qualified commercial opportunities. This is a critical sector building role: part enterprise sales, part partnerships, part market development, part public sector navigation, and part GTM leadership. Core responsibilities 1. Lead engagement with public sector organisations and priority accounts Own Cosine's day to day engagement with priority public sector organisations, including central government departments, arm's length bodies, regulators, public agencies, national infrastructure bodies, and public sector technology teams. Build on Cosine's growing reputation in sovereign AI, secure deployment, and trusted AI engineering to create senior routes into the right organisations. Maintain a clear account map across key public sector organisations, including executive sponsors, digital and technology leaders, commercial/procurement stakeholders, policy teams, risk/security owners, and delivery teams. Move relationships from broad sovereign AI interest into specific, practical areas where Cosine can create value. 2. Build multi threaded senior relationships Develop relationships across multiple departments, divisions, seniority levels, and decision making layers in each target account. Engage CIO, CTO, CISO, CDIO, digital, data, engineering, architecture, commercial, procurement, transformation, policy, security, and operational stakeholders. Identify how priorities differ across teams, for example secure AI deployment, software assurance, legacy modernisation, operational resilience, cost reduction, productivity, national capability, procurement risk, and governance. Build enough trust that Cosine becomes part of the strategic conversation around sovereign AI adoption, not just another vendor responding to tenders. 3. Build Cosine's understanding of public sector sovereign AI priorities Run structured discovery across public sector organisations to understand what they truly care about in sovereign AI. Capture use cases, constraints, buying triggers, objections, governance requirements, security expectations, procurement routes, deployment models, and success metrics. Translate public sector customer signal into internal intelligence for sales, partnerships, product, research, engineering, marketing, and leadership. Build a sector view of where Cosine has the strongest right to win, including priority use cases, highest intent accounts, likely buyer personas, procurement routes, SI influence, and repeatable commercial narratives. Priority areas to explore include: Secure AI coding and software engineering inside sensitive or regulated public sector environments. AI adoption where source code, credentials, data, or infrastructure cannot leave the customer's control boundary. Legacy system modernisation and maintenance. Software assurance, auditability, testing, review, and governance. Productivity and resilience across public sector digital delivery teams. Deployment models across public cloud, customer VPC, on prem, secure environments, and air gapped environments where required. National capability, sovereign AI, and reducing dependency on foreign controlled AI infrastructure. 4. Build towards commercial opportunities Convert reputation, relationship building, and market education into qualified pipeline opportunities. Identify where there is a real public sector problem, accountable owner, budget route, technical champion, procurement path, and reason to act now. Shape opportunities into concrete next steps: workshops, technical deep dives, discovery sessions, pilots, proof of concepts, deployment planning, bid participation, or commercial proposals. Work with the wider GTM team to move qualified public sector opportunities through the sales cycle. Keep a clear view of account status, stakeholder map, open actions, risks, next steps, procurement routes, SI involvement, and commercial likelihood. The role should focus deeply on commercial pull: serious conversations, mapped accounts, live opportunities, pilots, bid routes, and ultimately revenue. 5. Work closely with systems integrators and delivery partners Work alongside Cosine's Head of Partnerships to build and manage relationships with the systems integrators, consultancies, and delivery partners that shape public sector buying. Identify where SIs can create routes into accounts, provide bid access, support delivery credibility, or help Cosine become part of larger transformation programmes. Build joint account plans with priority partners where there is a clear public sector opportunity. Support bid strategy, partner positioning, framework access, and teaming discussions where Cosine is best placed as a specialist sovereign AI or secure AI engineering partner. Ensure SI engagement is commercially purposeful, with clear ownership, target accounts, bid opportunities, and follow up actions. 6. Navigate public sector routes to market Build a clear view of the procurement and commercial routes that matter for Cosine in public sector. Understand where Cosine should pursue direct engagement, partner led opportunities, framework routes, innovation pathways, pilots, or inclusion in larger SI led bids. Help shape compliant engagement approaches that create trust without relying on frequent hosted events or activity that could create procurement issues. Use targeted briefings, structured discovery, partner conversations, written materials, and appropriate market engagement routes to progress opportunities. Work with legal, commercial, partnerships, and leadership to ensure public sector engagement is commercially useful and procurement aware. 7. Help build the GTM team in public sector Help define what the public sector GTM motion should become as Cosine scales. Build the early playbook for account selection, stakeholder mapping, discovery, qualification, partner led entry, SI engagement, bid strategy, pilot design, procurement navigation, and commercial progression. Help recruit, onboard, and develop future GTM hires focused on public sector. Establish the operating cadence for the sector: account reviews, pipeline tracking, partner follow up, bid tracking, customer insight capture, and internal reporting. Work closely with SDRs, partnerships, marketing, founders, enterprise sales, and the Head of Partnerships to make public sector a repeatable vertical. What good looks like in the first 6 months Multi threaded relationships established across the most important public sector accounts. The three top priority public sector accounts are established, with account maps, stakeholder coverage, routes to procurement, partner/SI strategy, and business cases set out. A structured view of public sector sovereign AI use cases, buyer priorities, objections, procurement routes, SI influence, and buying triggers. Qualified opportunities progressing into discovery, technical deep dives, pilots, bid discussions, partner motions, or commercial proposals. Clear working rhythm with the Head of Partnerships on SI engagement, bid routes, partner mapping, and public sector account strategy. A clear public sector GTM playbook that future hires can build from. Success metrics Relationship and market development Number of priority public sector accounts actively engaged. Number of senior stakeholder relationships built across target accounts. Number of multi threaded accounts with executive, technical, commercial, procurement, and partner coverage. Quality of customer insight captured on sovereign AI priorities, deployment requirements, procurement constraints, and use cases. Commercial progression Qualified public sector opportunities created. Workshops, technical deep dives, pilots, bid discussions, partner motions, or proposals initiated. Pipeline generated or influenced. . click apply for full job details
Cosine
Job title: Full Stack Product Engineer Location: London; full in-office working as default Start date: ASAP Reports to: Head of Engineering Compensation: BASE : £70,000 - £90,000 EQUITY : £70,000 - £90,000 _ Cosine at a glance Cosine is the UK's frontier AI lab for autonomous software engineering - not another coding assistant, but our own models, agent stack, eval harnesses, and product layer. We build our agent tooling entirely in-house and post train open source models to deliver reliable, enterprise grade coding performance in security critical settings. Our offerings can be used as SaaS, deployed on VPC, on prem or fully air gapped. Through this flexability, we are able to service large-scale, highly regulated enterprises and industries including defence, financial service and healthcare. We're backed by YC and were recently selected for the UK's sovereign AI programme. The company is at a rare stage: deep technical work, real enterprise pull, and a chance to shape how AI is deployed inside defence, banking, government, and other high trust environments. This role is based in our Hoxton office, five days a week, because close collaboration, fast feedback, and shared context matter for the problems we're solving. _ The role A Full Stack Product Engineer at Cosine works closely across research, engineering, infrastructure, product, and design to turn advanced AI capabilities into intuitive, reliable tools for developers. You will be responsible for building and evolving Cosine's user facing product surfaces, including dedicated apps and web applications that expose the power of our models through well designed workflows and interfaces. Your work sits at the intersection of product, platform, and research, translating emerging model capabilities into concrete experiences developers can use every day. We focus on rapid product iteration without compromising quality. This means building systems that are performant, observable, and robust, while remaining flexible enough to evolve alongside fast moving research and user needs. You will help define how developers interact with Cosine, from first use through advanced, production grade workflows. _ Your Mission Push the boundaries of what an autonomous agentic AI engineer can do by building scalable, high quality web application interfaces and integrations that expose the power of our models in intuitive, reliable ways. Responsibilities Build end user products (command line interfaces, web applications and platform capabilities) that integrate with the Cosine platform APIs Enable developers to use advanced language models to augment their workflows and problem solving capabilities Collaborate closely research to explore and validate new product experiences and capabilities Translate emerging model capabilities into concrete, user facing features Maintain a high bar for performance, reliability, and usability across platforms Be opinionated about and bring your own ideas to the table, we're building for engineers, as an engineer you have a say in what you want to use. _ Skills & Experience Frontend & Application Development Experience building reactive, highly interactive applications (React, Svelte, Vue) Experience with cli application development or local software development is a plus Backend & Systems Experience with backend development Experience designing and consuming REST APIs Developer Experience Experience working with developer tooling Familiarity with CI/CD pipelines Experience with containerization Programming Languages Strong experience with TypeScript and modern frontend frameworks Knowledge of Node.js, Python, and Go is a plus Tooling & Infrastructure Git, Docker, Webpack, npm, Kubernetes, GCP Monitoring and alerting tools (e.g. Grafana, Datadog) Feature flagging systems _ You Might Thrive in This Role If You: Have 5+ years of experience building production grade software. Have shipped and maintained complex frontend or full stack applications used by technical users. Are comfortable building highly interactive web or IDE based experiences using modern frameworks (e.g. React, TypeScript). Have experience designing and consuming APIs, and understand how frontend and backend systems evolve together. Enjoy working close to the product surface, translating ambiguous ideas and model capabilities into intuitive developer workflows. Care deeply about developer experience, performance, and reliability-not just functionality. Are comfortable iterating quickly, running experiments, and refining products based on real user feedback. Can operate effectively in a fast moving environment with evolving priorities and incomplete information. _ Cosine is an equal opportunity employer. We value diverse backgrounds, perspectives, and ways of thinking, and we're committed to creating an inclusive and respectful workplace. We encourage applications from anyone who meets the role requirements, even if you don't meet every single qualification. If you need reasonable adjustments at any stage of the hiring process, we're happy to discuss them. _ Compensation, Benefits & Ways of Working We're an in office team, five days a week, by design. We believe the work we're doing benefits from being together, collaborating closely, and building shared context. What you can expect: Competitive salary, benchmarked to the market Equity / share options, so you share in the upside you help create 30 days' holiday + bank holidays Genuine 9-5 working hours - we don't expect late nights or weekend work Work hard in the office, collaborate closely, and switch off properly Dog friendly office - bring your dog to work Weekly team breakfast & lunch Monthly socials Pension High quality equipment to do your best work We care about focus, sustainability, and doing great work - not performative overwork. We value people who show up, contribute thoughtfully, collaborate well with their colleagues, and then go home. This role won't suit everyone. But if you want structure, clarity, strong collaboration, and a team that takes both the work and work life balance seriously, it's a great place to be. _ Agency & Data Protection Notice To comply with UK GDPR and our internal data protection and equal opportunity obligations, we only accept candidate applications and agency submissions via our Applicant Tracking System (ATS). This ensures appropriate privacy notices, lawful processing, auditability, and consistent retention controls. Any CVs or candidate details received outside the ATS (including via email, Slack, or direct message) will be treated as unsolicited, will not be considered as part of the recruitment process, and will not give rise to any fee or payment obligation.
Job title: Full Stack Product Engineer Location: London; full in-office working as default Start date: ASAP Reports to: Head of Engineering Compensation: BASE : £70,000 - £90,000 EQUITY : £70,000 - £90,000 _ Cosine at a glance Cosine is the UK's frontier AI lab for autonomous software engineering - not another coding assistant, but our own models, agent stack, eval harnesses, and product layer. We build our agent tooling entirely in-house and post train open source models to deliver reliable, enterprise grade coding performance in security critical settings. Our offerings can be used as SaaS, deployed on VPC, on prem or fully air gapped. Through this flexability, we are able to service large-scale, highly regulated enterprises and industries including defence, financial service and healthcare. We're backed by YC and were recently selected for the UK's sovereign AI programme. The company is at a rare stage: deep technical work, real enterprise pull, and a chance to shape how AI is deployed inside defence, banking, government, and other high trust environments. This role is based in our Hoxton office, five days a week, because close collaboration, fast feedback, and shared context matter for the problems we're solving. _ The role A Full Stack Product Engineer at Cosine works closely across research, engineering, infrastructure, product, and design to turn advanced AI capabilities into intuitive, reliable tools for developers. You will be responsible for building and evolving Cosine's user facing product surfaces, including dedicated apps and web applications that expose the power of our models through well designed workflows and interfaces. Your work sits at the intersection of product, platform, and research, translating emerging model capabilities into concrete experiences developers can use every day. We focus on rapid product iteration without compromising quality. This means building systems that are performant, observable, and robust, while remaining flexible enough to evolve alongside fast moving research and user needs. You will help define how developers interact with Cosine, from first use through advanced, production grade workflows. _ Your Mission Push the boundaries of what an autonomous agentic AI engineer can do by building scalable, high quality web application interfaces and integrations that expose the power of our models in intuitive, reliable ways. Responsibilities Build end user products (command line interfaces, web applications and platform capabilities) that integrate with the Cosine platform APIs Enable developers to use advanced language models to augment their workflows and problem solving capabilities Collaborate closely research to explore and validate new product experiences and capabilities Translate emerging model capabilities into concrete, user facing features Maintain a high bar for performance, reliability, and usability across platforms Be opinionated about and bring your own ideas to the table, we're building for engineers, as an engineer you have a say in what you want to use. _ Skills & Experience Frontend & Application Development Experience building reactive, highly interactive applications (React, Svelte, Vue) Experience with cli application development or local software development is a plus Backend & Systems Experience with backend development Experience designing and consuming REST APIs Developer Experience Experience working with developer tooling Familiarity with CI/CD pipelines Experience with containerization Programming Languages Strong experience with TypeScript and modern frontend frameworks Knowledge of Node.js, Python, and Go is a plus Tooling & Infrastructure Git, Docker, Webpack, npm, Kubernetes, GCP Monitoring and alerting tools (e.g. Grafana, Datadog) Feature flagging systems _ You Might Thrive in This Role If You: Have 5+ years of experience building production grade software. Have shipped and maintained complex frontend or full stack applications used by technical users. Are comfortable building highly interactive web or IDE based experiences using modern frameworks (e.g. React, TypeScript). Have experience designing and consuming APIs, and understand how frontend and backend systems evolve together. Enjoy working close to the product surface, translating ambiguous ideas and model capabilities into intuitive developer workflows. Care deeply about developer experience, performance, and reliability-not just functionality. Are comfortable iterating quickly, running experiments, and refining products based on real user feedback. Can operate effectively in a fast moving environment with evolving priorities and incomplete information. _ Cosine is an equal opportunity employer. We value diverse backgrounds, perspectives, and ways of thinking, and we're committed to creating an inclusive and respectful workplace. We encourage applications from anyone who meets the role requirements, even if you don't meet every single qualification. If you need reasonable adjustments at any stage of the hiring process, we're happy to discuss them. _ Compensation, Benefits & Ways of Working We're an in office team, five days a week, by design. We believe the work we're doing benefits from being together, collaborating closely, and building shared context. What you can expect: Competitive salary, benchmarked to the market Equity / share options, so you share in the upside you help create 30 days' holiday + bank holidays Genuine 9-5 working hours - we don't expect late nights or weekend work Work hard in the office, collaborate closely, and switch off properly Dog friendly office - bring your dog to work Weekly team breakfast & lunch Monthly socials Pension High quality equipment to do your best work We care about focus, sustainability, and doing great work - not performative overwork. We value people who show up, contribute thoughtfully, collaborate well with their colleagues, and then go home. This role won't suit everyone. But if you want structure, clarity, strong collaboration, and a team that takes both the work and work life balance seriously, it's a great place to be. _ Agency & Data Protection Notice To comply with UK GDPR and our internal data protection and equal opportunity obligations, we only accept candidate applications and agency submissions via our Applicant Tracking System (ATS). This ensures appropriate privacy notices, lawful processing, auditability, and consistent retention controls. Any CVs or candidate details received outside the ATS (including via email, Slack, or direct message) will be treated as unsolicited, will not be considered as part of the recruitment process, and will not give rise to any fee or payment obligation.