776 to 800 of 1,192 Full Stack Engineer Jobs in London

that emphasises simplicity, efficiency, and rapid execution. Our goal is to remove obstacles, enabling you to achieve success faster and more effectively. Role Overview As a Senior Software Engineer, you will play a pivotal role in architecting and developing our next-generation web application and API. This role requires technical leadership, hands-on development, and mentoring of junior … API endpoints using NodeJS and Express, including detailed API documentation. Database Management: Design, optimize, and maintain complex SQL data models, ensuring efficient data structures, query performance, and reliability. Full-Stack Development: Develop responsive and performant front-end applications using ReactJS, focusing on UX/UI best practices. Integration & Automation: Architect and maintain integrations with external APIs … to enhance development efficiency. Qualifications and Key Skills Education: Bachelor’s in Computer Science or related field from a Tier 1 university. Experience: Minimum of 4 years of full-time professional experience in software development, with strong expertise in TypeScript, ReactJS, and Next.JS. Solid experience in building RESTful APIs Leadership: Proven track record of leading development teams and More ❯

Code (IAC), security, testing, and continuous delivery pipelines. Flexibility to transition between programming languages with a clear understanding of their suitability for different tasks Essential Extensive experience in full-stack software engineering, including design, development, testing, and deployment. Significant hands on experience with Java, Spring Boot and Microservices. Strong understanding of software development methodologies such as … and lead engineering teams to success. Expertise in designing scalable and secure software architectures. Desirable Knowledge of emerging technologies like AI Previous, relevant experience as a senior software engineer Leading a large multidisciplinary project Line management experience Experience interviewing and screening candidates Experience responding to bid questions Skills Software Architecture:Expertise in designing scalable, secure, and efficient software More ❯

Staff Software Engineer – AI/ML (Business Systems Intelligence) London (Hybrid – 2 days per week in office) An opportunity to take on a high-impact, hands-on leadership role within a scaling global SaaS company that’s using AI to reinvent how internal business systems and data work together. As a Staff Software Engineer (AI/… with large language models — creating intelligent tools and insights that enhance the way teams operate. This is a role with real influence: you’ll own the internal AI stack, mentor other engineers, and help define how AI and automation are adopted across the company. What You’ll Do Lead the design, architecture, and implementation of internal AI/… and deliver high-value AI applications. Mentor engineers and shape the company’s approach to internal AI enablement. What You’ll Bring 7+ years’ experience in backend or full-stack engineering, ideally within a SaaS or data-driven business. Strong knowledge of LLMs , prompt engineering, and fine-tuning approaches. Hands-on experience with AI/ML More ❯

Staff Software Engineer – AI/ML (Business Systems Intelligence) London (Hybrid – 2 days per week in office) An opportunity to take on a high-impact, hands-on leadership role within a scaling global SaaS company that’s using AI to reinvent how internal business systems and data work together. As a Staff Software Engineer (AI/… with large language models — creating intelligent tools and insights that enhance the way teams operate. This is a role with real influence: you’ll own the internal AI stack, mentor other engineers, and help define how AI and automation are adopted across the company. What You’ll Do Lead the design, architecture, and implementation of internal AI/… and deliver high-value AI applications. Mentor engineers and shape the company’s approach to internal AI enablement. What You’ll Bring 7+ years’ experience in backend or full-stack engineering, ideally within a SaaS or data-driven business. Strong knowledge of LLMs , prompt engineering, and fine-tuning approaches. Hands-on experience with AI/ML More ❯

Staff Software Engineer – AI/ML (Business Systems Intelligence) London-based Remote if you don't live in London (2 days in office if you are London based) An opportunity to take on a high-impact, hands-on leadership role within a scaling global SaaS company that’s using AI to reinvent how internal business systems and data … work together. As a Staff Software Engineer (AI/ML) , you’ll be the technical lead for a newly formed AI Engineering function , designing and delivering the internal AI and data infrastructure that supports smarter decision-making across the organisation. You’ll build and scale AI-powered backend systems that connect enterprise data platforms (CRM, analytics, and communication … with large language models — creating intelligent tools and insights that enhance the way teams operate. This is a role with real influence: you’ll own the internal AI stack, mentor other engineers, and help define how AI and automation are adopted across the company. What You’ll Do Lead the design, architecture, and implementation of internal AI/ More ❯

Staff Software Engineer – AI/ML (Business Systems Intelligence) London-based Remote if you don't live in London (2 days in office if you are London based) An opportunity to take on a high-impact, hands-on leadership role within a scaling global SaaS company that’s using AI to reinvent how internal business systems and data … work together. As a Staff Software Engineer (AI/ML) , you’ll be the technical lead for a newly formed AI Engineering function , designing and delivering the internal AI and data infrastructure that supports smarter decision-making across the organisation. You’ll build and scale AI-powered backend systems that connect enterprise data platforms (CRM, analytics, and communication … with large language models — creating intelligent tools and insights that enhance the way teams operate. This is a role with real influence: you’ll own the internal AI stack, mentor other engineers, and help define how AI and automation are adopted across the company. What You’ll Do Lead the design, architecture, and implementation of internal AI/ More ❯

Machine Learning Engineer Description The company We are a rapidly growing startup developing solutions that blend human expertise and AI agents to handle manual customer and marketplace operations tasks. Our unique approach combines the strengths of human expertise (high accuracy and nuanced decision-making) with the advantages of AI automation (speed and cost efficiency). This cutting-edge … our journey - and we are very excited about our plans for growth over the coming year and beyond! The role We are now looking for a Machine Learning Engineer to build and deliver innovative AI products to our customers. Your software expertise and machine learning knowledge will help transform our customers' manual processes into AI-automated solutions. Your … machine learning and computer vision technologies, shaping Unitary's future. Take ownership of customer outcomes with the autonomy to make decisions that surprise and delight our customers. Contribute full-stack development, including software engineering, DevOps, and MLOps, along with light task and project management to ensure your AI solutions deliver maximum value. Requirements You We are More ❯

Machine Learning Engineer Description The company We are a rapidly growing startup developing solutions that blend human expertise and AI agents to handle manual customer and marketplace operations tasks. Our unique approach combines the strengths of human expertise (high accuracy and nuanced decision-making) with the advantages of AI automation (speed and cost efficiency). This cutting-edge … our journey - and we are very excited about our plans for growth over the coming year and beyond! The role We are now looking for a Machine Learning Engineer to build and deliver innovative AI products to our customers. Your software expertise and machine learning knowledge will help transform our customers' manual processes into AI-automated solutions. Your … machine learning and computer vision technologies, shaping Unitary's future. Take ownership of customer outcomes with the autonomy to make decisions that surprise and delight our customers. Contribute full-stack development, including software engineering, DevOps, and MLOps, along with light task and project management to ensure your AI solutions deliver maximum value. Requirements You We are More ❯

Role: Java Engineer - Native Apps Location: London office/Hybrid (2 days per week in the office) Reporting to: Engineering Manager Rightmove's Native Apps are central to how millions of people find their next home. We are investing in creating faster, smarter, and more personalised mobile experiences, built on modern technology, powered by data, and driven by … technology that powers the UK's most trusted property platform, while contributing to an inclusive engineering culture that values learning, creativity, and impact. The Role As a Java Engineer , you will develop high-quality, reliable, and scalable software that can be deployed frequently and safely into production. You will work in a cross-functional team alongside product managers … of scalable, secure, and maintainable systems • Work closely with colleagues in Product, UX, QA, and Data to deliver complete, high-quality features Nice to Have: • Experience across the full stack or exposure to front-end, iOS, or Android development • Familiarity with cloud and container technologies such as Kubernetes and Google Cloud Platform (GCP) • Experience working with More ❯

About The Role Job Level: 9 UK Wide We are looking for a Senior Software Engineer who will be responsible for designing, developing, and deploying high-quality software solutions. You will work on complex software projects, contributing to the architecture, development, and improvement of software systems. This role involves mentoring junior engineers, collaborating with cross-functional teams, and … processes are followed, and contribute to process optimisation initiatives. Communicate complex technical concepts effectively to non-technical stakeholders. About You Professional knowledge and experience Essential Proven experience in full-stack software development, including design, development, testing, and deployment. Significant hands on experience with Java, Spring Boot and Microservices. Strong understanding of Agile and DevOps practices, with More ❯

Founding Engineer Build Something That Matters £You ve built products from scratch, worn five hats at once, and made tough calls with limited data. A stealth-mode climate tech startup is building a new category of AI-powered environmental intelligence. They're turning cutting-edge science into real-time insights for global industries, helping operators, investors, and … planetary-scale data Now they need you as their first software engineer. Turning scientific models into a usable, commercial product Building APIs, setting up infra, and shaping the full-stack Defining the early engineering culture and best practices 7+ years of experience (Python-focused, ideally backend-leaning) Experience with huge datasets and/or geospatial data More ❯

Founding Engineer Build Something That Matters £100–130k upwards plus equity (~1%) You’ve done the 0 to 1 thing. You’ve built products from scratch, worn five hats at once, and made tough calls with limited data. You want your next move to count, not just for your career, but for the planet. This one’s for … Turning scientific models into a usable, commercial product Setting up the technical toolkit Designing and architecting the product from scratch Building APIs, setting up infra, and shaping the full-stack Working hands-on with the CEO and Chief Scientist Defining the early engineering culture and best practices You should have: 7+ years of experience (Python-focused More ❯

Founding Engineer Build Something That Matters £100–130k upwards plus equity (~1%) You’ve done the 0 to 1 thing. You’ve built products from scratch, worn five hats at once, and made tough calls with limited data. You want your next move to count, not just for your career, but for the planet. This one’s for … Turning scientific models into a usable, commercial product Setting up the technical toolkit Designing and architecting the product from scratch Building APIs, setting up infra, and shaping the full-stack Working hands-on with the CEO and Chief Scientist Defining the early engineering culture and best practices You should have: 7+ years of experience (Python-focused More ❯

boost their engineering team due to high speed growth.Remember to check your CV before applying Also, ensure you read through all the requirements related to this role. Tech Stack: ● Backend: Python is our go-to for its versatility and suitability for both application logic and data processing, fostering collaboration. ● Frontend: We value great UX; expect React and rigorous … a hybrid role where you'll be spending 2/3 days a week onsite in London What you'll bring: ● Significant professional experience (e.g., 5+ years) in full-stack software development. ● Strong proficiency in Python for backend development. ● Experience with modern frontend frameworks (e.g., React, Vue, Angular). ● Solid understanding of database technologies (e.g., PostgreSQL More ❯

Job: DataOps Engineer Location: Kings Cross London 2/3 times per week Pay rate: £850.66 per day Inside IR35 Term: 6 months, ASAP start date Description : Our client want to supercharge their data capability to better understand their patients and accelerate their ability to discover vaccines and medicines. The organization represents a major investment by our clients … R&D and Digital & Tech, designed to deliver a step-change in their ability to leverage data, knowledge, and prediction to find new medicines.They are a full-stack shop consisting of product and portfolio leadership, data engineering, infrastructure and DevOps, data/metadata/knowledge platforms, and AI/ML and analysis platforms, all geared toward … unit collaborators to get faster to key insights leading to faster biopharmaceutical development cycles. Improving engineering efficiency: Extensible, reusable, scalable, updateable We are looking for an experienced DataOps Engineer to join our clients’ growing Data Ops team. As a Data Ops Engineer is a highly technical individual contributor, building modern, cloud-native, DevOps-first systems for More ❯

Job: DataOps Engineer Location: Kings Cross London 2/3 times per week Pay rate: £850.66 per day Inside IR35 Term: 6 months, ASAP start date Description : Our client want to supercharge their data capability to better understand their patients and accelerate their ability to discover vaccines and medicines. The organization represents a major investment by our clients … R&D and Digital & Tech, designed to deliver a step-change in their ability to leverage data, knowledge, and prediction to find new medicines.They are a full-stack shop consisting of product and portfolio leadership, data engineering, infrastructure and DevOps, data/metadata/knowledge platforms, and AI/ML and analysis platforms, all geared toward … unit collaborators to get faster to key insights leading to faster biopharmaceutical development cycles. Improving engineering efficiency: Extensible, reusable, scalable, updateable We are looking for an experienced DataOps Engineer to join our clients’ growing Data Ops team. As a Data Ops Engineer is a highly technical individual contributor, building modern, cloud-native, DevOps-first systems for More ❯

Job: DataOps Engineer Location: Kings Cross London 2/3 times per week Pay rate: £850.66 per day Inside IR35 Term: 6 months, ASAP start date Description : Our client want to supercharge their data capability to better understand their patients and accelerate their ability to discover vaccines and medicines. The organization represents a major investment by our clients … R&D and Digital & Tech, designed to deliver a step-change in their ability to leverage data, knowledge, and prediction to find new medicines.They are a full-stack shop consisting of product and portfolio leadership, data engineering, infrastructure and DevOps, data/metadata/knowledge platforms, and AI/ML and analysis platforms, all geared toward … unit collaborators to get faster to key insights leading to faster biopharmaceutical development cycles. Improving engineering efficiency: Extensible, reusable, scalable, updateable We are looking for an experienced DataOps Engineer to join our clients’ growing Data Ops team. As a Data Ops Engineer is a highly technical individual contributor, building modern, cloud-native, DevOps-first systems for More ❯

Job: DataOps Engineer Location: Kings Cross London 2/3 times per week Pay rate: £850.66 per day Inside IR35 Term: 6 months, ASAP start date Description : Our client want to supercharge their data capability to better understand their patients and accelerate their ability to discover vaccines and medicines. The organization represents a major investment by our clients … R&D and Digital & Tech, designed to deliver a step-change in their ability to leverage data, knowledge, and prediction to find new medicines.They are a full-stack shop consisting of product and portfolio leadership, data engineering, infrastructure and DevOps, data/metadata/knowledge platforms, and AI/ML and analysis platforms, all geared toward … unit collaborators to get faster to key insights leading to faster biopharmaceutical development cycles. Improving engineering efficiency: Extensible, reusable, scalable, updateable We are looking for an experienced DataOps Engineer to join our clients’ growing Data Ops team. As a Data Ops Engineer is a highly technical individual contributor, building modern, cloud-native, DevOps-first systems for More ❯

Senior Software Engineer - Gen AI 1 day a week in Central London, hybrid working Salaries paying £90k-£125k + annual bonus Oliver Bernard have partnered with a rapidly growing FinTech in London who are building the next generation of AI based financial products. We are looking for Senior Software Engineers who have commercial experience with GenerativeAI and LLM … integrations. You will be building Gen AI frontend agents and working with hybrid codebases with hosted prompts. This is a full stack opportunity working in their Gen AIU team, working across Python, TypeScript and React. We are looking for strong product led engineers, not just high scale specialists. Tech Stack: Python, TS, React, React … Databases. The client are looking for someone to start as soon as possible and they are moving quickly with interviews! Please apply now for more information! Senior Software Engineer - Gen AI More ❯

Senior Software Engineer - Gen AI 1 day a week in Central London, hybrid working Salaries paying £90k-£125k + annual bonus Oliver Bernard have partnered with a rapidly growing FinTech in London who are building the next generation of AI based financial products. We are looking for Senior Software Engineers who have commercial experience with GenerativeAI and LLM … integrations. You will be building Gen AI frontend agents and working with hybrid codebases with hosted prompts. This is a full stack opportunity working in their Gen AIU team, working across Python, TypeScript and React. We are looking for strong product led engineers, not just high scale specialists. Tech Stack: Python, TS, React, React … Databases. The client are looking for someone to start as soon as possible and they are moving quickly with interviews! Please apply now for more information! Senior Software Engineer - Gen AI More ❯

Founding Software Engineer - AI Start-Up (Central London | On-Site | Equity + Salary)🧑‍🚀 One of London’s most promising AI start-ups are looking for their first few Founding Engineers! Backed by top-tier investors and led by an elite founding team from Oxford, Cambridge, and Imperial , this venture is already attracting serious attention within the AI space … Currently in stealth mode, they’re now searching for a Founding Software Engineer to join the core team - someone ambitious, technically exceptional, and ready to help build the company from the ground up! 💡 About the Company Founded by alumni of successful AI start-ups, this is a business led by people who’ve done it before - and done … well. With strong funding and a clear product vision, they're building cutting-edge technology that leverages the latest advances in AI to solve high-impact problems. 🛠️ Tech Stack: Python - core backend and ML integration TypeScript/Node.js/React - full-stack development AWS - scalable, production-grade infrastructure This is a hands-on role More ❯

Founding Software Engineer - AI Start-Up (Central London | On-Site | Equity + Salary)🧑‍🚀 One of London’s most promising AI start-ups are looking for their first few Founding Engineers! Backed by top-tier investors and led by an elite founding team from Oxford, Cambridge, and Imperial , this venture is already attracting serious attention within the AI space … Currently in stealth mode, they’re now searching for a Founding Software Engineer to join the core team - someone ambitious, technically exceptional, and ready to help build the company from the ground up! 💡 About the Company Founded by alumni of successful AI start-ups, this is a business led by people who’ve done it before - and done … well. With strong funding and a clear product vision, they're building cutting-edge technology that leverages the latest advances in AI to solve high-impact problems. 🛠️ Tech Stack: Python - core backend and ML integration TypeScript/Node.js/React - full-stack development AWS - scalable, production-grade infrastructure This is a hands-on role More ❯

Founding Software Engineer - AI Start-Up (Central London | On-Site | Equity + Salary)🧑‍🚀 One of London’s most promising AI start-ups are looking for their first few Founding Engineers! Backed by top-tier investors and led by an elite founding team from Oxford, Cambridge, and Imperial , this venture is already attracting serious attention within the AI space … Currently in stealth mode, they’re now searching for a Founding Software Engineer to join the core team - someone ambitious, technically exceptional, and ready to help build the company from the ground up! 💡 About the Company Founded by alumni of successful AI start-ups, this is a business led by people who’ve done it before - and done … well. With strong funding and a clear product vision, they're building cutting-edge technology that leverages the latest advances in AI to solve high-impact problems. 🛠️ Tech Stack: Python - core backend and ML integration TypeScript/Node.js/React - full-stack development AWS - scalable, production-grade infrastructure This is a hands-on role More ❯

Founding Software Engineer - AI Start-Up (Central London | On-Site | Equity + Salary)🧑‍🚀 One of London’s most promising AI start-ups are looking for their first few Founding Engineers! Backed by top-tier investors and led by an elite founding team from Oxford, Cambridge, and Imperial , this venture is already attracting serious attention within the AI space … Currently in stealth mode, they’re now searching for a Founding Software Engineer to join the core team - someone ambitious, technically exceptional, and ready to help build the company from the ground up! 💡 About the Company Founded by alumni of successful AI start-ups, this is a business led by people who’ve done it before - and done … well. With strong funding and a clear product vision, they're building cutting-edge technology that leverages the latest advances in AI to solve high-impact problems. 🛠️ Tech Stack: Python - core backend and ML integration TypeScript/Node.js/React - full-stack development AWS - scalable, production-grade infrastructure This is a hands-on role More ❯

Founding Software Engineer – AI (Python/Typescript) £150,000 – £175,000 + meaningful equity On-site in London (£10K relocation provided) Join a deeply technical AI-native startup founded by PhDs and researchers from Cambridge, Imperial, and other top European and US institutions . This is an opportunity to work directly with a team who’ve published at … leading AI conferences, built open-source tools used across the industry, and scaled high-performance systems from first principles. Now, they’re hiring a Founding Software Engineer to help build the next generation of reasoning tools powered by large language models. The product is already live with paying customers, and the company is well-funded with serious growth … ambitions. What you'll work on: Architecting and scaling LLM-powered applications Building efficient inference pipelines and backend infrastructure Working across the stack to ship production-grade code fast Collaborating directly with the founders and early technical hires What they’re looking for: A degree from a world-leading university (e.g. Cambridge, Oxford, EPFL, ETH Zurich, ENS, TUM More ❯