1,126 to 1,150 of 1,667 Full Stack Engineer Jobs in London

LLM Engineer - 120k - Hybrid Do you want to work for a business thats set to become the UKs next unicorn? We're looking for engineers who can take existing LLMs and shape their outputs into polished, user-facing features. You'll collaborate closely with product and design, and make AI experiences that feel seamless, intelligent, and trustworthy. The … between Senior and Staff level, so you'll be working alongside some of the best minds in the field. What we're looking for: Experience with LLM APIs Full-stack experience, including Python Bonus: start-up experience What's on offer: 120,000 Equity Flexible hybrid working If you're passionate about AI, we'd love More ❯

LLM Engineer - 120k - Hybrid Do you want to work for a business thats set to become the UKs next unicorn? We're looking for engineers who can take existing LLMs and shape their outputs into polished, user-facing features. You'll collaborate closely with product and design, and make AI experiences that feel seamless, intelligent, and trustworthy. The … between Senior and Staff level, so you'll be working alongside some of the best minds in the field. What we're looking for: Experience with LLM APIs Full-stack experience, including Python Bonus: start-up experience What's on offer: 120,000 Equity Flexible hybrid working If you're passionate about AI, we'd love More ❯

LLM Engineer - £120k - Hybrid Do you want to work for a business that’s set to become the UK’s next unicorn?🦄✨ We're looking for engineers who can take existing LLMs and shape their outputs into polished, user-facing features. You'll collaborate closely with product and design, and make AI experiences that feel seamless, intelligent, and … between Senior and Staff level, so you'll be working alongside some of the best minds in the field. What we're looking for: Experience with LLM APIs Full-stack experience, including Python Bonus: start-up experience👀 What's on offer: £120,000 Equity Flexible hybrid working If you're passionate about AI, we'd love More ❯

LLM Engineer - £120k - Hybrid Do you want to work for a business that’s set to become the UK’s next unicorn?🦄✨ We're looking for engineers who can take existing LLMs and shape their outputs into polished, user-facing features. You'll collaborate closely with product and design, and make AI experiences that feel seamless, intelligent, and … between Senior and Staff level, so you'll be working alongside some of the best minds in the field. What we're looking for: Experience with LLM APIs Full-stack experience, including Python Bonus: start-up experience👀 What's on offer: £120,000 Equity Flexible hybrid working If you're passionate about AI, we'd love More ❯

through national programmes and grants, helping everyone find the tools to overcome challenges and thrive.We’re now looking for a Back End Developer to join us on a full-time, permanent basis, working 37 hours per week. The Benefits - Salary of £43,042 per annum (inclusive of £1,044 market supplement and £480 home working allowance)- An annual … flu jabs vouchers- Cycle to work scheme- Investing in your professional development with ongoing quality training and career development opportunitiesThis is a brilliant opportunity for a talented software engineer who’s confident working with Node.js, TypeScript, and PostgreSQL to join a team that values creativity and growth.You’ll be enabled to keep learning, experiment with new ideas, and … and data models- Experience managing PostgreSQL databases including, schema design and optimisationThe closing date for this role is Sunday 9th November 2025.Other organisations may call this role Software Engineer, Software Developer, Back End Software Engineer, Server-Side Developer, Full Stack Developer, or API Developer.Our commitment to Equality, Diversity & Inclusion:We are happy More ❯

through national programmes and grants, helping everyone find the tools to overcome challenges and thrive. Were now looking for a Back End Developer to join us on a full-time, permanent basis, working 37 hours per week. The Benefits - Salary of £43,042 per annum (inclusive of £1,044 market supplement and £480 home working allowance) - An annual … jabs vouchers - Cycle to work scheme - Investing in your professional development with ongoing quality training and career development opportunities This is a brilliant opportunity for a talented software engineer whos confident working with Node.js, TypeScript, and PostgreSQL to join a team that values creativity and growth. Youll be enabled to keep learning, experiment with new ideas, and use … models - Experience managing PostgreSQL databases including, schema design and optimisation The closing date for this role is Sunday 9th November 2025. Other organisations may call this role Software Engineer, Software Developer, Back End Software Engineer, Server-Side Developer, Full Stack Developer, or API Developer. Our commitment to Equality, Diversity & Inclusion: We are More ❯

Senior Software Support Engineer Hybrid – London £85,000 - £100,000 An innovative eCommerce SaaS company in London who have a global customer base and extremely innovative product suite are in need of an experienced Support Engineer (Software & Infrastructure). This will be a hugely impactful role, working with Ruby on rails & JavaScript SaaS applications, AWS cloud … environments and Linux-based systems. The new Senior Software Support Engineer will be part of a senior team and focus on identifying software issues across a broad range of software products, focusing on fixing bugs and the route cause analysis of these issues. If you have a full stack software engineering background (JavaScript and … previous Ruby on Rails) and really see the importance of ensuring a positive user experience through maintaining and improving software applications, this could be the Senior Software Support Engineer opportunity for you! What You’ll Do Own product stability end-to-end: investigate, reproduce, and resolve issues across the stack. Define and optimise our bug fixing and resolution More ❯

Senior Software Support Engineer Hybrid – London £85,000 - £100,000 An innovative eCommerce SaaS company in London who have a global customer base and extremely innovative product suite are in need of an experienced Support Engineer (Software & Infrastructure). This will be a hugely impactful role, working with Ruby on rails & JavaScript SaaS applications, AWS cloud … environments and Linux-based systems. The new Senior Software Support Engineer will be part of a senior team and focus on identifying software issues across a broad range of software products, focusing on fixing bugs and the route cause analysis of these issues. If you have a full stack software engineering background (JavaScript and … previous Ruby on Rails) and really see the importance of ensuring a positive user experience through maintaining and improving software applications, this could be the Senior Software Support Engineer opportunity for you! What You’ll Do Own product stability end-to-end: investigate, reproduce, and resolve issues across the stack. Define and optimise our bug fixing and resolution More ❯

Senior Software Support Engineer Hybrid – London £85,000 - £100,000 An innovative eCommerce SaaS company in London who have a global customer base and extremely innovative product suite are in need of an experienced Support Engineer (Software & Infrastructure). This will be a hugely impactful role, working with Ruby on rails & JavaScript SaaS applications, AWS cloud … environments and Linux-based systems. The new Senior Software Support Engineer will be part of a senior team and focus on identifying software issues across a broad range of software products, focusing on fixing bugs and the route cause analysis of these issues. If you have a full stack software engineering background (JavaScript and … previous Ruby on Rails) and really see the importance of ensuring a positive user experience through maintaining and improving software applications, this could be the Senior Software Support Engineer opportunity for you! What You’ll Do Own product stability end-to-end: investigate, reproduce, and resolve issues across the stack. Define and optimise our bug fixing and resolution More ❯

Senior Software Support Engineer Hybrid – London £85,000 - £100,000 An innovative eCommerce SaaS company in London who have a global customer base and extremely innovative product suite are in need of an experienced Support Engineer (Software & Infrastructure). This will be a hugely impactful role, working with Ruby on rails & JavaScript SaaS applications, AWS cloud … environments and Linux-based systems. The new Senior Software Support Engineer will be part of a senior team and focus on identifying software issues across a broad range of software products, focusing on fixing bugs and the route cause analysis of these issues. If you have a full stack software engineering background (JavaScript and … previous Ruby on Rails) and really see the importance of ensuring a positive user experience through maintaining and improving software applications, this could be the Senior Software Support Engineer opportunity for you! What You’ll Do Own product stability end-to-end: investigate, reproduce, and resolve issues across the stack. Define and optimise our bug fixing and resolution More ❯

looking for a Product Lead to join the first core squad of a new vertical initiative. You will own discovery, design, and early product execution, working alongside a full-stack AI engineer and business/industry experts. What You'll Do Lead user discovery : map workflows, run interviews, validate pain points. Translate insights into More ❯

Senior Product Engineer Fullstack TS + AI/ML London/Hybrid - up to 90k + Excellent Benefits Senior Product Engineer with previous experience working on AI/ML products required to join small team revolutionising the legal sector. Youd be joining a small, highly capable product team and own major architectural decisions like at a … startup but with the backing of a major firm. Role Highlights: Work full stack in a TypeScript environment and closely with AI/ML Work closely with a PM, designer, and developers to shape an AI product ready for global rollout Have all the excitement and autonomy of a startup but with the backing of a … Up to 90,000 base + annual bonus (10%) + excellent benefits Please reach out if: You have fullstack TypeScript/React experience Proven Senior SWE or Product Engineer who has worked on products with AI features Enjoy both hands-on coding and technical leadership Are comfortable making architectural calls in a small, fast-moving team. Apply here More ❯

Senior Product Engineer Fullstack TS + AI/ML London/Hybrid - up to 90k + Excellent Benefits Senior Product Engineer with previous experience working on AI/ML products required to join small team revolutionising the legal sector. Youd be joining a small, highly capable product team and own major architectural decisions like at a … startup but with the backing of a major firm. Role Highlights: Work full stack in a TypeScript environment and closely with AI/ML Work closely with a PM, designer, and developers to shape an AI product ready for global rollout Have all the excitement and autonomy of a startup but with the backing of a … Up to 90,000 base + annual bonus (10%) + excellent benefits Please reach out if: You have fullstack TypeScript/React experience Proven Senior SWE or Product Engineer who has worked on products with AI features Enjoy both hands-on coding and technical leadership Are comfortable making architectural calls in a small, fast-moving team. Apply here More ❯

Senior Product Engineer – Fullstack TS + AI/ML – London/Hybrid - up to £90k + Excellent Benefits Senior Product Engineer with previous experience working on AI/ML products required to join small team revolutionising the legal sector. You’d be joining a small, highly capable product team and own major architectural decisions like at … a startup – but with the backing of a major firm. Role Highlights: Work full stack in a TypeScript environment and closely with AI/ML Work closely with a PM, designer, and developers to shape an AI product ready for global rollout Have all the excitement and autonomy of a startup but with the backing of … Up to £90,000 base + annual bonus (10%) + excellent benefits Please reach out if: ✅ You have fullstack TypeScript/React experience ✅ Proven Senior SWE or Product Engineer who has worked on products with AI features ✅ Enjoy both hands-on coding and technical leadership ✅ Are comfortable making architectural calls in a small, fast-moving team. Apply here More ❯

Senior Product Engineer – Fullstack TS + AI/ML – London/Hybrid - up to £90k + Excellent Benefits Senior Product Engineer with previous experience working on AI/ML products required to join small team revolutionising the legal sector. You’d be joining a small, highly capable product team and own major architectural decisions like at … a startup – but with the backing of a major firm. Role Highlights: Work full stack in a TypeScript environment and closely with AI/ML Work closely with a PM, designer, and developers to shape an AI product ready for global rollout Have all the excitement and autonomy of a startup but with the backing of … Up to £90,000 base + annual bonus (10%) + excellent benefits Please reach out if: ✅ You have fullstack TypeScript/React experience ✅ Proven Senior SWE or Product Engineer who has worked on products with AI features ✅ Enjoy both hands-on coding and technical leadership ✅ Are comfortable making architectural calls in a small, fast-moving team. Apply here More ❯

Senior Product Engineer – Fullstack TS + AI/ML – London/Hybrid - up to £90k + Excellent Benefits Senior Product Engineer with previous experience working on AI/ML products required to join small team revolutionising the legal sector. You’d be joining a small, highly capable product team and own major architectural decisions like at … a startup – but with the backing of a major firm. Role Highlights: Work full stack in a TypeScript environment and closely with AI/ML Work closely with a PM, designer, and developers to shape an AI product ready for global rollout Have all the excitement and autonomy of a startup but with the backing of … Up to £90,000 base + annual bonus (10%) + excellent benefits Please reach out if: ✅ You have fullstack TypeScript/React experience ✅ Proven Senior SWE or Product Engineer who has worked on products with AI features ✅ Enjoy both hands-on coding and technical leadership ✅ Are comfortable making architectural calls in a small, fast-moving team. Apply here More ❯

Senior Product Engineer – Fullstack TS + AI/ML – London/Hybrid - up to £90k + Excellent Benefits Senior Product Engineer with previous experience working on AI/ML products required to join small team revolutionising the legal sector. You’d be joining a small, highly capable product team and own major architectural decisions like at … a startup – but with the backing of a major firm. Role Highlights: Work full stack in a TypeScript environment and closely with AI/ML Work closely with a PM, designer, and developers to shape an AI product ready for global rollout Have all the excitement and autonomy of a startup but with the backing of … Up to £90,000 base + annual bonus (10%) + excellent benefits Please reach out if: ✅ You have fullstack TypeScript/React experience ✅ Proven Senior SWE or Product Engineer who has worked on products with AI features ✅ Enjoy both hands-on coding and technical leadership ✅ Are comfortable making architectural calls in a small, fast-moving team. Apply here More ❯

We are seeking a Principal Engineer/Engineering Manager to lead one of the core engineering teams within Planning Agent , our AI-powered advertising planning platform used daily by IPG agency teams. You will help shape and grow a product with AI at its core, using agents to power an AI assistant advertising planners throughout their workflow. Youll … lead a cross-functional team of 810 remote engineers and data scientists, distributed across multiple countries in Europe, with a significant presence in Poland and Ukraine. Our tech stack includes Python with a React frontend, deployed on AWS in Kubernetes clusters, using GCP for Gemini and LangGraph for agent orchestration. While youll have the resources of a large … requirements into actionable engineering tasks Discuss technical solutions with the development team, communicate goals, and facilitate execution Develop and expand product capabilities, from AI-driven features to core full-stack enhancements Lead functional design and code reviews, providing constructive feedback Coordinate with QA to achieve automated testing in support of continuous delivery Build and maintain a More ❯

We are seeking a Principal Engineer/Engineering Manager to lead one of the core engineering teams within Planning Agent , our AI-powered advertising planning platform used daily by IPG agency teams. You will help shape and grow a product with AI at its core, using agents to power an AI assistant advertising planners throughout their workflow. Youll … lead a cross-functional team of 810 remote engineers and data scientists, distributed across multiple countries in Europe, with a significant presence in Poland and Ukraine. Our tech stack includes Python with a React frontend, deployed on AWS in Kubernetes clusters, using GCP for Gemini and LangGraph for agent orchestration. While youll have the resources of a large … requirements into actionable engineering tasks Discuss technical solutions with the development team, communicate goals, and facilitate execution Develop and expand product capabilities, from AI-driven features to core full-stack enhancements Lead functional design and code reviews, providing constructive feedback Coordinate with QA to achieve automated testing in support of continuous delivery Build and maintain a More ❯

We are seeking a Principal Engineer/Engineering Manager to lead one of the core engineering teams within Planning Agent , our AI-powered advertising planning platform used daily by IPG agency teams. You will help shape and grow a product with AI at its core, using agents to power an AI assistant advertising planners throughout their workflow. Youll … lead a cross-functional team of 810 remote engineers and data scientists, distributed across multiple countries in Europe, with a significant presence in Poland and Ukraine. Our tech stack includes Python with a React frontend, deployed on AWS in Kubernetes clusters, using GCP for Gemini and LangGraph for agent orchestration. While youll have the resources of a large … requirements into actionable engineering tasks Discuss technical solutions with the development team, communicate goals, and facilitate execution Develop and expand product capabilities, from AI-driven features to core full-stack enhancements Lead functional design and code reviews, providing constructive feedback Coordinate with QA to achieve automated testing in support of continuous delivery Build and maintain a More ❯

We are seeking a Principal Engineer/Engineering Manager to lead one of the core engineering teams within Planning Agent , our AI-powered advertising planning platform used daily by IPG agency teams. You will help shape and grow a product with AI at its core, using agents to power an AI assistant advertising planners throughout their workflow. Youll … lead a cross-functional team of 810 remote engineers and data scientists, distributed across multiple countries in Europe, with a significant presence in Poland and Ukraine. Our tech stack includes Python with a React frontend, deployed on AWS in Kubernetes clusters, using GCP for Gemini and LangGraph for agent orchestration. While youll have the resources of a large … requirements into actionable engineering tasks Discuss technical solutions with the development team, communicate goals, and facilitate execution Develop and expand product capabilities, from AI-driven features to core full-stack enhancements Lead functional design and code reviews, providing constructive feedback Coordinate with QA to achieve automated testing in support of continuous delivery Build and maintain a More ❯

Affinity Labs: Founding Engineer (Backend) Location: London Area, United Kingdom · On-site Company Description At Affinity Labs, we’re building the future of company creation, a full-stack AI venture studio that partners with content creators to co-found authentic, scalable software businesses. By combining AI-native development with creator-led distribution, we're … queue/messaging patterns. Startup mindset: high ownership, pace, ambiguity; willing to burn the midnight oil when needed . Growth mindset & flexibility: open to feedback; not rigid about stack/tools. Clear communicator & collaborator; lean on your experience to guide product decisions. Evidence of shipping quickly in small teams (links to repos, case studies, or live services). … LangChain or CrewAI for orchestration; MCP servers for integrations. Security hygiene (secrets, permissions, least-privilege) and practical data-privacy basics. Planning & execution in Linear (or similar). Tools & Stack Backend/Runtime: Python (FastAPI), Node.js. Datastores: PostgreSQL, MongoDB (as appropriate), Redis (caching/sessions). Vectors/Embeddings: Chroma (or similar). AI Models & APIs: Claude (Anthropic), Gemini More ❯

Affinity Labs: Founding Engineer (Backend) Location: London Area, United Kingdom · On-site Company Description At Affinity Labs, we’re building the future of company creation, a full-stack AI venture studio that partners with content creators to co-found authentic, scalable software businesses. By combining AI-native development with creator-led distribution, we're … queue/messaging patterns. Startup mindset: high ownership, pace, ambiguity; willing to burn the midnight oil when needed . Growth mindset & flexibility: open to feedback; not rigid about stack/tools. Clear communicator & collaborator; lean on your experience to guide product decisions. Evidence of shipping quickly in small teams (links to repos, case studies, or live services). … LangChain or CrewAI for orchestration; MCP servers for integrations. Security hygiene (secrets, permissions, least-privilege) and practical data-privacy basics. Planning & execution in Linear (or similar). Tools & Stack Backend/Runtime: Python (FastAPI), Node.js. Datastores: PostgreSQL, MongoDB (as appropriate), Redis (caching/sessions). Vectors/Embeddings: Chroma (or similar). AI Models & APIs: Claude (Anthropic), Gemini More ❯

Affinity Labs: Founding Engineer (Backend) Location: London Area, United Kingdom · On-site Company Description At Affinity Labs, we’re building the future of company creation, a full-stack AI venture studio that partners with content creators to co-found authentic, scalable software businesses. By combining AI-native development with creator-led distribution, we're … queue/messaging patterns. Startup mindset: high ownership, pace, ambiguity; willing to burn the midnight oil when needed . Growth mindset & flexibility: open to feedback; not rigid about stack/tools. Clear communicator & collaborator; lean on your experience to guide product decisions. Evidence of shipping quickly in small teams (links to repos, case studies, or live services). … LangChain or CrewAI for orchestration; MCP servers for integrations. Security hygiene (secrets, permissions, least-privilege) and practical data-privacy basics. Planning & execution in Linear (or similar). Tools & Stack Backend/Runtime: Python (FastAPI), Node.js. Datastores: PostgreSQL, MongoDB (as appropriate), Redis (caching/sessions). Vectors/Embeddings: Chroma (or similar). AI Models & APIs: Claude (Anthropic), Gemini More ❯

Affinity Labs: Founding Engineer (Backend) Location: London Area, United Kingdom · On-site Company Description At Affinity Labs, we’re building the future of company creation, a full-stack AI venture studio that partners with content creators to co-found authentic, scalable software businesses. By combining AI-native development with creator-led distribution, we're … queue/messaging patterns. Startup mindset: high ownership, pace, ambiguity; willing to burn the midnight oil when needed . Growth mindset & flexibility: open to feedback; not rigid about stack/tools. Clear communicator & collaborator; lean on your experience to guide product decisions. Evidence of shipping quickly in small teams (links to repos, case studies, or live services). … LangChain or CrewAI for orchestration; MCP servers for integrations. Security hygiene (secrets, permissions, least-privilege) and practical data-privacy basics. Planning & execution in Linear (or similar). Tools & Stack Backend/Runtime: Python (FastAPI), Node.js. Datastores: PostgreSQL, MongoDB (as appropriate), Redis (caching/sessions). Vectors/Embeddings: Chroma (or similar). AI Models & APIs: Claude (Anthropic), Gemini More ❯