926 to 950 of 1,242 Software Engineer Jobs in London

Full Stack Engineer - Investment Technology My hedge fund client is hiring a full stack engineer to join a high-performing team focused on building advanced tools for discretionary trading. This team develops analytics platforms that support portfolio managers in making informed decisions and managing risk across global markets. The role offers the chance to work closely with investment More ❯

Lead Java Engineer – London | £140k + Shares Java 21, Spring Boot, Microservices, TDD, BDD, REST, AWS, React You know that feeling when you’re not just writing code, you’re building the engine behind something that moves money, manages risk, and scales globally? That’s exactly what this team is doing. They’re a fast-growing FinTech tackling cross … be fast, secure, and bulletproof. Tech stack: Java 21 (you’ll need experience with Java 17+, must), Spring Boot, PostgreSQL, AWS, TDD, CI/CD, React. As a Lead Engineer, you’ll have the freedom to shape the team, influence architecture, and build things the right way. They’re in-office just 1–2 days a week in London More ❯

Lead Java Engineer – London | £140k + Shares Java 21, Spring Boot, Microservices, TDD, BDD, REST, AWS, React You know that feeling when you’re not just writing code, you’re building the engine behind something that moves money, manages risk, and scales globally? That’s exactly what this team is doing. They’re a fast-growing FinTech tackling cross … be fast, secure, and bulletproof. Tech stack: Java 21 (you’ll need experience with Java 17+, must), Spring Boot, PostgreSQL, AWS, TDD, CI/CD, React. As a Lead Engineer, you’ll have the freedom to shape the team, influence architecture, and build things the right way. They’re in-office just 1–2 days a week in London More ❯

Founding C# Engineer - Cybersecurity - Seed-Stage Start-Up Join an early-stage cybersecurity start-up on a mission to transform how modern organisations detect and respond to threats across cloud and enterprise systems. They’re already working with forward-thinking customers - and now we’re hiring exceptional engineers to help build the future of security from the ground up. … Why Join Join as an early founding engineer , working directly with the founders Shape product, architecture, and company culture from day one Build for real customers - solving critical problems at scale Modern, lean tech stack designed for speed, reliability, and scale Competitive salary + meaningful early equity What You’ll Do Design, build, and ship high-impact features across … About You 3+ years’ experience building backend systems at scale Strong in C#, Python , Go , Java or similar backend languages Familiar with cloud platforms (AWS, GCP, or Azure) Pragmatic engineer who values both speed and quality Excited by cybersecurity - no prior experience needed, just curiosity London-based or able to collaborate in-person regularly This is a unique opportunity More ❯

Founding C# Engineer - Cybersecurity - Seed-Stage Start-Up Join an early-stage cybersecurity start-up on a mission to transform how modern organisations detect and respond to threats across cloud and enterprise systems. They’re already working with forward-thinking customers - and now we’re hiring exceptional engineers to help build the future of security from the ground up. … Why Join Join as an early founding engineer , working directly with the founders Shape product, architecture, and company culture from day one Build for real customers - solving critical problems at scale Modern, lean tech stack designed for speed, reliability, and scale Competitive salary + meaningful early equity What You’ll Do Design, build, and ship high-impact features across … About You 3+ years’ experience building backend systems at scale Strong in C#, Python , Go , Java or similar backend languages Familiar with cloud platforms (AWS, GCP, or Azure) Pragmatic engineer who values both speed and quality Excited by cybersecurity - no prior experience needed, just curiosity London-based or able to collaborate in-person regularly This is a unique opportunity More ❯

of digital lending. Tech Stack Java 11+ Spring Boot AWS Microservices architecture Docker/Kubernetes Kafka (or similar messaging tools) Key Responsibilities Design and develop high-performance, low-latency software components. Contribute across the full software development lifecycle. Write and maintain clean, testable, scalable code. Manage and enhance CI/CD and development process tooling. Collaborate in agile … Upgrading core systems to newer Java versions. Enhancing UI frameworks (e.g., Vaadin). Building a new lender platform and modern payment systems. Who You Are A hands-on, pragmatic engineer who thrives in collaborative, fast-moving teams. A self-starter who enjoys autonomy and contributing ideas that drive real change. Experienced in modern Java development with a solid understanding More ❯

of digital lending. Tech Stack Java 11+ Spring Boot AWS Microservices architecture Docker/Kubernetes Kafka (or similar messaging tools) Key Responsibilities Design and develop high-performance, low-latency software components. Contribute across the full software development lifecycle. Write and maintain clean, testable, scalable code. Manage and enhance CI/CD and development process tooling. Collaborate in agile … Upgrading core systems to newer Java versions. Enhancing UI frameworks (e.g., Vaadin). Building a new lender platform and modern payment systems. Who You Are A hands-on, pragmatic engineer who thrives in collaborative, fast-moving teams. A self-starter who enjoys autonomy and contributing ideas that drive real change. Experienced in modern Java development with a solid understanding More ❯

Lead Full Stack Engineer - London (Hybrid) A well funded start up who are revolutionising real estate transactions through cutting-edge technology combining sophisticated AI capabilities with robust financial data systems are looking for a Lead Full Stack Engineer to join their team. What will I be doing: Design, develop, test, deploy, and maintain robust and scalable backend systems … engineers, and other stakeholders to translate requirements into technical solutions Mentor Senior Engineers int he team What are we looking for: At least 7+ years in professional full-stack software development Strong proficiency in Python for backend development Experience with modern frontend frameworks (React, Vue, Angular) Solid understanding of database technologies (PostgreSQL, MySQL) and data modeling Experience designing and More ❯

Lead Full Stack Engineer - London (Hybrid) A well funded start up who are revolutionising real estate transactions through cutting-edge technology combining sophisticated AI capabilities with robust financial data systems are looking for a Lead Full Stack Engineer to join their team. What will I be doing: Design, develop, test, deploy, and maintain robust and scalable backend systems … engineers, and other stakeholders to translate requirements into technical solutions Mentor Senior Engineers int he team What are we looking for: At least 7+ years in professional full-stack software development Strong proficiency in Python for backend development Experience with modern frontend frameworks (React, Vue, Angular) Solid understanding of database technologies (PostgreSQL, MySQL) and data modeling Experience designing and More ❯

Lead Full Stack Engineer - London (Hybrid) A well funded start up who are revolutionising real estate transactions through cutting-edge technology combining sophisticated AI capabilities with robust financial data systems are looking for a Lead Full Stack Engineer to join their team. What will I be doing: Design, develop, test, deploy, and maintain robust and scalable backend systems … engineers, and other stakeholders to translate requirements into technical solutions Mentor Senior Engineers int he team What are we looking for: At least 7+ years in professional full-stack software development Strong proficiency in Python for backend development Experience with modern frontend frameworks (React, Vue, Angular) Solid understanding of database technologies (PostgreSQL, MySQL) and data modeling Experience designing and More ❯

Lead Full Stack Engineer - London (Hybrid) A well funded start up who are revolutionising real estate transactions through cutting-edge technology combining sophisticated AI capabilities with robust financial data systems are looking for a Lead Full Stack Engineer to join their team. What will I be doing: Design, develop, test, deploy, and maintain robust and scalable backend systems … engineers, and other stakeholders to translate requirements into technical solutions Mentor Senior Engineers int he team What are we looking for: At least 7+ years in professional full-stack software development Strong proficiency in Python for backend development Experience with modern frontend frameworks (React, Vue, Angular) Solid understanding of database technologies (PostgreSQL, MySQL) and data modeling Experience designing and More ❯

transaction services, to make mobility ecological, efficient and convenient. Are you adaptable, flexible and pragmatic with a DevOps mindset ? Are you able to apply good engineering processes to deliver software products of high quality and performance, even with occasionally ambiguous requirements? Our ideal candidate will be a lifelong learner who enjoys solving technical problems, is curious about new technologies … pre-release and production environments running on AWS. We operate a DevOps culture and are responsible for developing, deploying, operating and monitoring our team's deliverables. As the senior engineer in the team, you will set the technical standard for the team; offering mentoring and support to your team-mates. Who are you Highly skilled and proficient coding in … direction to your team and contributing to the wider engineering organisation. Deep technical understanding of MySQL and relational databases, particularly database performance tuning. Knowledge of best practises around Modern Software Engineering, CI/CD, DORA metrics. Experience of troubleshooting and fixing performance issues in a full-stack application; from browser to the database. Experience of software architecture and More ❯

Be part of HL's future. Be part of the future of investing. Shape it with us. What You'll Be Doing Building and deploying scalable, secure, and compliant software at pace. Integrating HL web and mobile apps with existing and new systems to deliver a seamless client experience across a range of products and services. Delivering value iteratively … outcomes with HL's mission and client value. Championing a culture of continuous learning, cross-functional collaboration, and inclusivity with a growth mindset. About You 5-8 years of software development experience within large-scale, regulated environments - ideally in Investment, Asset or Wealth Management. Solid experience in building and deploying frontend applications in React or React Native with hands …/TypeScript JavaScript/iOS (Swift) or Android (Kotlin) RDBMS (Oracle/Sybase)/NoSQL databases (Document DB) AWS and cloud-native microservices containerised architecture (e.g. K8s, Docker) Modern software engineering practices with CI/CD pipelines and DevOps principles TDD/BDD testing frameworks Desirable Java (21) and Spring Boot Interview Process 3 Stage Interview Stage 1 - Discussion More ❯

Job Title: Mid-Senior Java Engineer Location: London (Hybrid - 2-3 days in-office) Salary: Up to £85,000 per annum + Benefits Sector: Financial Services About the Role: We are seeking a Senior-Level Java Engineer to join a dynamic financial technology team in London. You will play a key role in developing, maintaining, and enhancing high … per week in the office. Key Responsibilities: Design, develop, and maintain high-quality Java-based applications for financial services. Collaborate with cross-functional teams to deliver robust and scalable software solutions. Ensure code quality, security, and performance standards are met. Work on both greenfield and existing applications, improving architecture and implementing best practices. Troubleshoot and resolve complex technical issues. … as AWS, Azure, or GCP. Strong problem-solving skills and a keen attention to detail. Experience in financial services or fintech is highly desirable. If you are a Java engineer looking to take the next step in your career within the financial sector, apply now More ❯

Senior Software Developer - Ruby 12-Month Contract Inside IR35 Role Details Location: London or Manchester (2 days/week onsite + monthly team rotation) Duration: 12 months Clearance: BPSS to start; active SC required due to timescale of the project Team: 10 direct reports, part of a 60+ programme Experience: 4+ years Essential Skills Technical: Strong Ruby development (primary More ❯

Senior Software Developer - Ruby 12-Month Contract Inside IR35 Role Details Location: London or Manchester (2 days/week onsite + monthly team rotation) Duration: 12 months Clearance: BPSS to start; active SC required due to timescale of the project Team: 10 direct reports, part of a 60+ programme Experience: 4+ years Essential Skills Technical: Strong Ruby development (primary 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 … mentoring, and driving delivery. In all cases, youll conduct code reviews, contribute to high-impact features, and foster a high-performance engineering culture. This position reports to the VP, Software Engineering, Planning. It will be primarily remote, though you are also welcome to work in our London office. Key Responsibilities: Shape the architecture and engineering design of the product … Proven experience as a senior technical leader in an Agile/Scrum environment Strong knowledge of Python and microservice architectures Experience building web applications, preferably including React Familiar with software development methodologies, scaled system design, and best practices Knowledge of AWS and cloud-native architectures; familiarity with LangGraph a plus Strong communication skills, able to explain technical problems clearly 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 … mentoring, and driving delivery. In all cases, youll conduct code reviews, contribute to high-impact features, and foster a high-performance engineering culture. This position reports to the VP, Software Engineering, Planning. It will be primarily remote, though you are also welcome to work in our London office. Key Responsibilities: Shape the architecture and engineering design of the product … Proven experience as a senior technical leader in an Agile/Scrum environment Strong knowledge of Python and microservice architectures Experience building web applications, preferably including React Familiar with software development methodologies, scaled system design, and best practices Knowledge of AWS and cloud-native architectures; familiarity with LangGraph a plus Strong communication skills, able to explain technical problems clearly More ❯

Full-Stack Engineer - Fixed Income Trading A top-tier hedge fund is hiring a Full-Stack Engineer aligned directly to a high-performing Fixed Income trading desk. This is not a platform role - you’ll sit close to the risk and P&L, build tools traders actually use in live markets, and ship fast. What you’ll build … better decisions. Top of the market compensation. High visibility. High expectations. No bureaucracy. Core requirements Expert-level proficiency in Python and JavaScript/TypeScript/React. 3+ years’ professional software engineering experience. Strong CS fundamentals (data structures, algorithms, performance). Comfortable building for live, data-heavy, real-time environments. Sharp communicator who’s happy to sit with risk takers … income/macro/FX/electronic trading/risk experience. Background in real-time, data-intensive, or low-latency environments. If you’re impact-led, comfortable owning production software that sits next to real money, and want to work where engineering output is directly tied to P&L, this is that role. More ❯

Full-Stack Engineer - Fixed Income Trading A top-tier hedge fund is hiring a Full-Stack Engineer aligned directly to a high-performing Fixed Income trading desk. This is not a platform role - you’ll sit close to the risk and P&L, build tools traders actually use in live markets, and ship fast. What you’ll build … better decisions. Top of the market compensation. High visibility. High expectations. No bureaucracy. Core requirements Expert-level proficiency in Python and JavaScript/TypeScript/React. 3+ years’ professional software engineering experience. Strong CS fundamentals (data structures, algorithms, performance). Comfortable building for live, data-heavy, real-time environments. Sharp communicator who’s happy to sit with risk takers … income/macro/FX/electronic trading/risk experience. Background in real-time, data-intensive, or low-latency environments. If you’re impact-led, comfortable owning production software that sits next to real money, and want to work where engineering output is directly tied to P&L, this is that role. More ❯

Full-Stack Engineer - Fixed Income Trading A top-tier hedge fund is hiring a Full-Stack Engineer aligned directly to a high-performing Fixed Income trading desk. This is not a platform role - you’ll sit close to the risk and P&L, build tools traders actually use in live markets, and ship fast. What you’ll build … better decisions. Top of the market compensation. High visibility. High expectations. No bureaucracy. Core requirements Expert-level proficiency in Python and JavaScript/TypeScript/React. 3+ years’ professional software engineering experience. Strong CS fundamentals (data structures, algorithms, performance). Comfortable building for live, data-heavy, real-time environments. Sharp communicator who’s happy to sit with risk takers … income/macro/FX/electronic trading/risk experience. Background in real-time, data-intensive, or low-latency environments. If you’re impact-led, comfortable owning production software that sits next to real money, and want to work where engineering output is directly tied to P&L, this is that role. More ❯

Full-Stack Engineer - Fixed Income Trading A top-tier hedge fund is hiring a Full-Stack Engineer aligned directly to a high-performing Fixed Income trading desk. This is not a platform role - you’ll sit close to the risk and P&L, build tools traders actually use in live markets, and ship fast. What you’ll build … better decisions. Top of the market compensation. High visibility. High expectations. No bureaucracy. Core requirements Expert-level proficiency in Python and JavaScript/TypeScript/React. 3+ years’ professional software engineering experience. Strong CS fundamentals (data structures, algorithms, performance). Comfortable building for live, data-heavy, real-time environments. Sharp communicator who’s happy to sit with risk takers … income/macro/FX/electronic trading/risk experience. Background in real-time, data-intensive, or low-latency environments. If you’re impact-led, comfortable owning production software that sits next to real money, and want to work where engineering output is directly tied to P&L, this is that role. More ❯

Senior Mobile Engineer/Technical Lead – Mobile (Flutter) Up to £110,000 + Benefits Central London, 4 Days On-Site + 1 Day Remote 80% Hands on/20% Leadership Can Provide Sponsorship We are working with an established SaaS business that has been driving innovation in the logistics and transport industry for over 25 years. Backed by significant More ❯

Senior Mobile Engineer/Technical Lead – Mobile (Flutter) Up to £110,000 + Benefits Central London, 4 Days On-Site + 1 Day Remote 80% Hands on/20% Leadership Can Provide Sponsorship We are working with an established SaaS business that has been driving innovation in the logistics and transport industry for over 25 years. Backed by significant More ❯

Seeking a highly skilled software engineering leader to join a global Risk Infrastructure function. This role will focus on developing and maintaining enterprise-grade systems and applications that enable effective management, reporting, and governance of model risk across the organisation. The successful candidate will combine technical expertise in Python, Django, and modern web frameworks with a passion for delivering More ❯