526 to 550 of 793 Software Engineering Jobs in the City of London

science, algorithmic precision, and intuitive design, we develop cutting-edge tools that enable users to analyze, interpret, and act on market dynamics with confidence. Your role As a Senior Software Engineer in the Product Engineering team you will build and evolve a data and content dissemination platform (Web, App, APIs, messaging) and corresponding data pipelines, ensuring that our … direct contact with business and technical stakeholders Work with product management to analyze and improve our business processes Conduct workload and complexity assessments Design, plan and implement new efficient software solutions in Python and Go Maintain and enhance our Airflow data pipelines Improve observability and scalability to support our constantly growing client base Continuously adapt to changing requirements in … Build and extend knowledge of financial instruments Minimum qualifications B.Sc. in Computer Science or similar field involving coding (e.g. physics or applied mathematics) Algorithms, data structures, complexity analysis and software design Hands-on senior level experience in Python programming Unix based systems, containerized environments and Kubernetes Working experience with databases: relational, NoSQL and time series Websocket, REST API and More ❯

Senior C# Developer/Software Engineer (C# .Net) London onsite to £150k Opportunity to progress your career in a senior, hands-on C# Developer role at a global Asset Manager with c$3 million under management. As a Senior C# Developer within the trading engine team you'll collaborate to design and develop real-time trading systems, you'll … excellent communication and stakeholder management skills You are degree educated in Computer Science or similar technical discipline What's in it for you: As a Senior C# Developer/Software Engineer you will receive a competitive package: Salary to £150k Bonus paid every six months based on personal performance (10-25%) Professional development Pension Health Insurance Gym membership Social … events, free fruit, snacks, coffee etc. Apply now to find out more about this Senior C# Developer/Software Engineer (C# .Net) opportunity. At Client Server we believe in a diverse workplace that allows people to play to their strengths and continually learn. We're an equal opportunities employer whose people come from all walks of life and will More ❯

science, algorithmic precision, and intuitive design, we develop cutting-edge tools that enable users to analyze, interpret, and act on market dynamics with confidence. Your role As a Senior Software Engineer in the Product Engineering team you will build and evolve a data and content dissemination platform (Web, App, APIs, messaging) and corresponding data pipelines, ensuring that our … direct contact with business and technical stakeholders Work with product management to analyze and improve our business processes Conduct workload and complexity assessments Design, plan and implement new efficient software solutions in Python and Go Maintain and enhance our Airflow data pipelines Improve observability and scalability to support our constantly growing client base Continuously adapt to changing requirements in … Build and extend knowledge of financial instruments Minimum qualifications B.Sc. in Computer Science or similar field involving coding (e.g. physics or applied mathematics) Algorithms, data structures, complexity analysis and software design Hands-on senior level experience in Python programming Unix based systems, containerized environments and Kubernetes Working experience with databases: relational, NoSQL and time series Websocket, REST API and More ❯

Software Developer Key Technologies: C#, .NET, .NET Core, Azure, SQL London Perm Role | Hybrid Working Structure £50,000 - £60,000 Harrington Starr has partnered with a global Investment Bank who are looking to hire a seasoned Senior C# Developer with extensive experience developing from Back to Front Office trading systems. Key Responsibilities: Design, develop and maintain Front Office systems More ❯

About the Job Staff Software Engineer Hybrid – 3 days a week in Central London Up to £120k + bonus + equity (or open to contract) Robotics/Automation/Life Sciences We’re working with a cutting-edge company at the intersection of robotics, software, and life sciences. Their mission is to build the engine that powers the … next generation of automated labs transforming how experiments are run and accelerating scientific discovery at scale. This is a chance to join a small, high-calibre engineering team working on systems that literally help save lives. About the Company Building next-gen lab automation platforms used in research and diagnostics Combining robotics, software, and data to automate experiments … end-to-end Backed by tier-1 investors and partnering with leading pharma and biotech companies Engineering-first culture with deep technical challenges Operating at the intersection of hardware, software, and AI What You’ll Be Doing Designing and building high-performance, real-time backend systems that power automated lab operations Working with Python and high-performance languages More ❯

Job Role: Senior Software Engineer, Frontend Job Type: Full Time, Permanent Location: London, Hybrid (3 office days a week) Role purpose As a valued member of our engineering team, you will contribute to the development of our new web application, powered by a Headless CMS, using the latest frontend technologies. Working with a modern Next.js TypeScript stack, your … of Travelex's and partner applications. Being part of the Online team, you will be working closely with engineers, designers and the product team. While this is primarily an engineering role, we are always looking for developers who have a keen eye for product and who can contribute to the development of features at a product level before they … Exposure to backend or full-stack development (Node.js, Express, etc.) Developing white-label applications Building internationalised applications Familiarity with frontend observability best practices (we use Datadog) Experience in agile software development methodologies Why Travelex? To remain the world’s leading foreign exchange specialist, we are focused on making our customers’ lives simpler, more engaging and hassle free while they More ❯

Job Role: Senior Software Engineer, Frontend Job Type: Full Time, Permanent Location: London, Hybrid (3 office days a week) Role purpose As a valued member of our engineering team, you will contribute to the development of our new web application, powered by a Headless CMS, using the latest frontend technologies. Working with a modern Next.js TypeScript stack, your … of Travelex's and partner applications. Being part of the Online team, you will be working closely with engineers, designers and the product team. While this is primarily an engineering role, we are always looking for developers who have a keen eye for product and who can contribute to the development of features at a product level before they … Exposure to backend or full-stack development (Node.js, Express, etc.) Developing white-label applications Building internationalised applications Familiarity with frontend observability best practices (we use Datadog) Experience in agile software development methodologies Why Travelex? To remain the world’s leading foreign exchange specialist, we are focused on making our customers’ lives simpler, more engaging and hassle free while they More ❯

Java Software Engineer Our client, a fast-growing payments technology company building next-generation solutions that power seamless, secure transactions around the world are seeking talented Java Engineers to join their collaborative and high-performing engineering team. What You’ll Do Design and build robust Microservices using Java and Spring Boot Work on scalable, event-driven systems that … process millions of transactions Collaborate with cross-functional teams (Product, DevOps, QA) to deliver high-quality software Contribute to technical discussions, architecture decisions, and best practices Continuously improve system performance, reliability, and security What We’re Looking For Strong experience with Java (11+) and Spring Boot Solid understanding of microservices architecture and RESTful APIs Experience with AWS or another More ❯

Principal Software Engineer Join a once in a career opportunity to help build a premium private bank from the ground up. Which is currently in stealth mode , backed by significant capital and led by a visionary team. With mobilisation underway, we’re assembling a lean, elite engineering team to architect and deliver a secure, scalable, multi-cloud banking … Python in production environments. Proven track record of building and deploying systems in multi-cloud environments (AWS & GCP). Strong understanding of cloud security , infrastructure as code , and platform engineering . Comfortable working in regulated industries , ideally financial services or fintech. Self-starter mindset, able to thrive in ambiguity and take ownership of complex problems. No formal leadership experience … with Rust async ecosystem , Kubernetes , Terraform , or Pulumi . Exposure FCA or JFSC or similar regulatory bodies. What's in it for you? Be part of a top-heavy engineering team with some of the finest minds in Rust and cloud architecture. Work on a greenfield platform with zero legacy constraints. Enjoy remote-first flexibility , high autonomy , and meaningful More ❯

working with many of the highest growth B2B companies out there. In order to keep up with demand, and accelerate development of the platform, we are expanding our core engineering team. ‍ About the role: As a Senior Software Engineer at GoodFit, you'll be at the forefront of our technological innovation and product delivery. We're looking for … pragmatism will be key to our success. ‍ You will: Be part of a small team, working in a fully remote-first environment, spanning Europe and UK As a senior software engineer, own understanding of business problems, design, implementation and release of critical features across our stack Design and develop scalable, efficient solutions primarily using JavaScript/TypeScript and AWS … technologies, but be prepared to work with a variety of other languages and tools as needed Be comfortable switching between frontend, backend, devops, and data engineering tasks as the project demands Assess the trade-offs between added complexity, development effort, and expected gains for new features or technologies Stay updated with industry trends and best practices, bringing relevant insights More ❯

Senior Software Engineer - Backend & Data | Fully Remote (UK) Founding Engineer | Python | GCP | Terraform | Event-Based Systems | Data Pipelines An innovative, mission-driven LegalTech SaaS start-up is looking for a Senior Product Engineer (Backend & Data) with deep experience in Python, Product development, and Data engineering. Role Information: Salary : Up to £100,000 (DOE) + Equity Location : Fully remote (UK … only) Stack : Python , TypeScript, GCP, Pub/Sub, SQL & NoSQL, IaC (Terraform), CI/CD (GitHub Actions), Observability tools, AI tooling You’ll join a remote first, high-trust engineering team working with a modern, cloud-native stack - with real influence over technical decisions from day one. You’ll take technical ownership of the backend to ensure it’s … your choice to boost workflow efficiency and deliver innovative Product features Autonomy & Ambiguity - discover, design, and build without micromanagement. Professional Development - dedicated time to explore new AI tools, Data engineering practices, and emerging tech to keep the Product ahead of the curve. They want engineers to be setup to stay on top in the new AI world. More ❯

Mid-Level Software Engineer At Nando’s, we’re more than flame-grilled PERi-PERi chicken – we’re a family of people who care deeply about creating experiences, supporting each other, and leaving a positive mark on the world. We believe brilliant ideas come from diverse voices, and we’re building a tech team where everyone feels they belong … and can grow. We’re looking for a Mid-Level Software Engineer to join our Accounting, Banking and Property (ABP) team . If you’re passionate about solving real-world problems, mentoring others, and working in an inclusive environment where collaboration and wellbeing are valued as highly as technical excellence – this could be the role for you. 🌍 Why Nando … At Nando’s, you’re part of a family, not just an org chart. 🛠️ What We’re Looking For Experience with Golang, Python, and/or TypeScript . Strong engineering background, ideally with exposure to distributed systems. Experience in agile practices and collaborative team environments. Clear communication skills and a sense of ownership. A curiosity to learn, and a More ❯

Mid-Level Software Engineer At Nando’s, we’re more than flame-grilled PERi-PERi chicken – we’re a family of people who care deeply about creating experiences, supporting each other, and leaving a positive mark on the world. We believe brilliant ideas come from diverse voices, and we’re building a tech team where everyone feels they belong … and can grow. We’re looking for a Mid-Level Software Engineer to join our Accounting, Banking and Property (ABP) team . If you’re passionate about solving real-world problems, mentoring others, and working in an inclusive environment where collaboration and wellbeing are valued as highly as technical excellence – this could be the role for you. 🌍 Why Nando … At Nando’s, you’re part of a family, not just an org chart. 🛠️ What We’re Looking For Experience with Golang, Python, and/or TypeScript . Strong engineering background, ideally with exposure to distributed systems. Experience in agile practices and collaborative team environments. Clear communication skills and a sense of ownership. A curiosity to learn, and a More ❯

Staff Software Engineer | Lead Engineer | Principal Engineer | £120K | Hybrid - London Staff Software Engineer – .NET | London (Hybrid) We’re working with a high-growth, tech-driven company undergoing a major platform modernization and are looking for a Staff Software Engineer to join their mission-critical engineering team. This is a hands-on technical leadership role with high … performance, reliability, and scalability Lead architecture and development of backend services using C#, ASP.NET, .NET Core Automate infrastructure, CI/CD pipelines, and cloud operations (AWS/Azure) Promote engineering best practices, security, and observability Mentor engineers and foster a culture of continuous improvement Contribute to technology direction, including adoption of tools like Go and Python What We’re More ❯

Staff Software Engineer | Lead Engineer | Principal Engineer | £120K | Hybrid - London Staff Software Engineer – .NET | London (Hybrid) We’re working with a high-growth, tech-driven company undergoing a major platform modernization and are looking for a Staff Software Engineer to join their mission-critical engineering team. This is a hands-on technical leadership role with high … performance, reliability, and scalability Lead architecture and development of backend services using C#, ASP.NET, .NET Core Automate infrastructure, CI/CD pipelines, and cloud operations (AWS/Azure) Promote engineering best practices, security, and observability Mentor engineers and foster a culture of continuous improvement Contribute to technology direction, including adoption of tools like Go and Python What We’re More ❯

candidate will help the Glint platform continue to grow, exercising an eye for detail across all aspects of the development lifecycle while maintaining organisation and good code hygiene. This Software Engineer should be able to effectively communicate both with internal teams and with clients. The successful candidate values teamwork and collaboration, as well as continuous learning and application of … new technologies and trends. With progression in this track, the responsibilities expand to include leading teams, designing complex software systems, providing mentorship, and managing cross-functional integration. Responsibilities: Design, build, deploy, and maintain quality code that is simple, well-structured, clear, and well-tested. Effectively break down and solve complex problems that require research or collaboration. Communicate effectively, regardless … to the team Strong command of multiple levels of automated testing (e.g., unit, integration, contract, end-to-end, etc.). Initiate design and feature discussions, advocating for improvements in software performance, scalability, reliability, and security. Coordinate with other teams to ensure the successful integration of software applications. Troubleshoot and resolve production incidents quickly and effectively. Understand, respond to More ❯

candidate will help the Glint platform continue to grow, exercising an eye for detail across all aspects of the development lifecycle while maintaining organisation and good code hygiene. This Software Engineer should be able to effectively communicate both with internal teams and with clients. The successful candidate values teamwork and collaboration, as well as continuous learning and application of … new technologies and trends. With progression in this track, the responsibilities expand to include leading teams, designing complex software systems, providing mentorship, and managing cross-functional integration. Responsibilities: Design, build, deploy, and maintain quality code that is simple, well-structured, clear, and well-tested. Effectively break down and solve complex problems that require research or collaboration. Communicate effectively, regardless … to the team Strong command of multiple levels of automated testing (e.g., unit, integration, contract, end-to-end, etc.). Initiate design and feature discussions, advocating for improvements in software performance, scalability, reliability, and security. Coordinate with other teams to ensure the successful integration of software applications. Troubleshoot and resolve production incidents quickly and effectively. Understand, respond to More ❯

leading fintech specialising in regulatory solutions, strategy and operations. The firm is a private equity-backed business with excellent growth tragectory. We are seeking a Senior Engineer with strong software experience and ambition to grow and develop their career. Responsibilities: Design and implement scalable, secure backend services to support a high-availability, data-driven SaaS platform operating in a … build microservices, automation tools, and backend logic, leveraging its rich ecosystem for data processing, compliance workflows, and API development. Collaborate with cross-functional teams including product, DevOps, and data engineering to deliver end-to-end functionality that meets regulatory and business requirements. Leverage modern cloud services (AWS, Azure, or GCP) to deploy, monitor, and scale distributed systems in production … environments. Establish and uphold engineering best practices, including CI/CD pipelines, automated testing, and peer code reviews, to ensure code quality, reliability, and auditability. Mentor and guide junior engineers, providing technical leadership and helping shape the team’s engineering culture and standards. Experience: Minimum 5 years’ experience working as a software developer in a commercial environment. More ❯

leading fintech specialising in regulatory solutions, strategy and operations. The firm is a private equity-backed business with excellent growth tragectory. We are seeking a Senior Engineer with strong software experience and ambition to grow and develop their career. Responsibilities: Design and implement scalable, secure backend services to support a high-availability, data-driven SaaS platform operating in a … build microservices, automation tools, and backend logic, leveraging its rich ecosystem for data processing, compliance workflows, and API development. Collaborate with cross-functional teams including product, DevOps, and data engineering to deliver end-to-end functionality that meets regulatory and business requirements. Leverage modern cloud services (AWS, Azure, or GCP) to deploy, monitor, and scale distributed systems in production … environments. Establish and uphold engineering best practices, including CI/CD pipelines, automated testing, and peer code reviews, to ensure code quality, reliability, and auditability. Mentor and guide junior engineers, providing technical leadership and helping shape the team’s engineering culture and standards. Experience: Minimum 5 years’ experience working as a software developer in a commercial environment. More ❯

Senior Software Engineer – Backend (Java) 📅 6-Month Contract | 🏢 Hybrid (2 Days in Office) | 💷 £600 p/d inside ir35 We’re looking for a skilled Backend Java Engineer to join an innovative team on a 6-month contract. If you love solving complex problems, mentoring others, and working on cutting-edge data platforms at scale- this one’s for … data platforms, frameworks & streaming technologies 🧩 Familiarity with microservices & distributed systems ☁️ Exposure to GCP (GKE, PubSub, BigQuery) 🗄️ Experience with relational/NoSQL databases 🐳 Proficiency with Docker & Kubernetes 🔄 Solid understanding of engineering best practices (CI/CD, Git, testing) 🧠 Problem-solving mindset & curiosity for new technologies 👉 If this sounds like your kind of challenge, I’d love to hear from you More ❯

Senior Software Engineer – Backend (Java) 📅 6-Month Contract | 🏢 Hybrid (2 Days in Office) | 💷 £600 p/d inside ir35 We’re looking for a skilled Backend Java Engineer to join an innovative team on a 6-month contract. If you love solving complex problems, mentoring others, and working on cutting-edge data platforms at scale- this one’s for … data platforms, frameworks & streaming technologies 🧩 Familiarity with microservices & distributed systems ☁️ Exposure to GCP (GKE, PubSub, BigQuery) 🗄️ Experience with relational/NoSQL databases 🐳 Proficiency with Docker & Kubernetes 🔄 Solid understanding of engineering best practices (CI/CD, Git, testing) 🧠 Problem-solving mindset & curiosity for new technologies 👉 If this sounds like your kind of challenge, I’d love to hear from you More ❯

Senior Software Engineer Node.js/AWS/React London (Hybrid, 3 days onsite) Are you the kind of Senior Software Engineer who enjoys taking something fast-and-scrappy and turning it into something scalable, elegant, and genuinely robust? This is a chance for a Senior Software Engineer to join a small, but ambitious tech-for-good/… based in the London City Centre thats building products to make sense of massive data streams. Youll be part of a tight-knit team (around ten people total, five software engineers), working on a genuinely greenfield platform with a modern stack and zero legacy The focus now is on maturing the codebase re-architecting, refactoring, testing, and scaling. As … a Senior Software Engineer, youll play a key role in helping the team evolve from early-stage speed to long-term stability, with the freedom to influence both product direction and engineering quality What youll be doing: Building and scaling a Node.js application that sits at the core of the product Designing and implementing new features for different More ❯

Senior C++ Software Developer, Python - Financial/Banking Candidates will have 5+ years C++ experience (ideally more) and excellent knowledge of Python - ideally coming from a Financial/Banking background with knowledge of Equities, Futures & Options and Fixed Income and Exchange Connectivity with some Low Latency experience. Job Overview You will work with the Product, Infrastructure and QA teams … to produce high performance, low latency and highly reliable code. Your goal will be to develop software which handle large amount of TPS to drive a highly efficient technology used by several markets around the world. To be successful in this role as a Senior Software Engineer C++, you will be a proponent of agile methodology and modern … software best practices. You can produce detailed technical work in OOP and work with other members of the Development team to produce code of high-quality standards. Ideally, you should have worked in critical systems development in the past. Responsibilities and Duties • Codes, tests, integrates, and documents software. • Provides technical leadership to more junior employees and other teams. • Apply More ❯

We are working with a growing VC-backed technology company that's revolutionising how software is built and deployed. At the forefront of AI-powered automation, creating innovative solutions - this organisation is continuing to evolve and is looking for a Senior Backend Engineer. You'll be responsible for building and evolving backend services, integrations, and workflow logic for cutting … code and make it production-ready Build robust backend services using Python APIs and data workflows Create seamless integrations with external systems Champion AI-assisted development practices across the engineering team What You'll Do: Own backend features and API integrations (Python, FastAPI, gRPC, SQL) Adapt and extend auto-generated pipelines and front-end outputs Build connectors for APIs … orchestration tools (Temporal, Dagster) Comfortable working with and improving generated code Experience with CI/CD pipelines, Docker, and cloud platforms (Azure/AWS/GCP) Understanding of modern software architecture patterns Disclaimer: Research indicates that men will apply to a role when they only meet 50-60% of the descriptions, however, when looking at women and other minority More ❯

We are working with a growing VC-backed technology company that's revolutionising how software is built and deployed. At the forefront of AI-powered automation, creating innovative solutions - this organisation is continuing to evolve and is looking for a Senior Backend Engineer. You'll be responsible for building and evolving backend services, integrations, and workflow logic for cutting … code and make it production-ready Build robust backend services using Python APIs and data workflows Create seamless integrations with external systems Champion AI-assisted development practices across the engineering team What You'll Do: Own backend features and API integrations (Python, FastAPI, gRPC, SQL) Adapt and extend auto-generated pipelines and front-end outputs Build connectors for APIs … orchestration tools (Temporal, Dagster) Comfortable working with and improving generated code Experience with CI/CD pipelines, Docker, and cloud platforms (Azure/AWS/GCP) Understanding of modern software architecture patterns Disclaimer: Research indicates that men will apply to a role when they only meet 50-60% of the descriptions, however, when looking at women and other minority More ❯