12 software developer jobs found in London

Senior Product Developer - 3 Positions A leading Market Data and Intelligence organisation is looking for three Senior Product Developers to join its engineering teams, working on software and data products within a large-scale, data-driven environment. The roles will focus on developing and enhancing applications using .NET/C#, Azure and SQL Server , with responsibility across the full software development life cycle. You'll be working on products supporting financial institutions and investment professionals, solving complex technical and data challenges. The technology environment is centred around the Microsoft ecosystem , with .NET/C#, SQL Server and Azure forming key parts of the platform. Depending on the product area, you may also work with Azure DevOps, CI/CD, REST APIs, Blazor and data ingestion/ETL . As a senior developer, you'll contribute to technical decisions, improve existing systems, address technical debt and work closely with Product, Engineering,...

Senior Product Developer - 3 Positions A leading Market Data and Intelligence organisation is looking for three Senior Product Developers to join its engineering teams, working on software and data products within a large-scale, data-driven environment. The roles will focus on developing and enhancing applications using .NET/C#, Azure and SQL Server , with responsibility across the full software development lifecycle. You'll be working on products supporting financial institutions and investment professionals, solving complex technical and data challenges. The technology environment is centred around the Microsoft ecosystem , with .NET/C#, SQL Server and Azure forming key parts of the platform. Depending on the product area, you may also work with Azure DevOps, CI/CD, REST APIs, Blazor and data ingestion/ETL . As a senior developer, you'll contribute to technical decisions, improve existing systems, address technical debt and work closely with Product, Engineering,...

Title – Software Developer in Test Client – Growing Fintech Rate - Up to £600 P/D Location – London (Hybrid)   We are looking for a talented an enthusiastic SDET to join a rapidly expanding fintech based in London!!   You will get the chance to work along side some of the best SDETs and software engineers that the industry has to offer whilst aiding in the development of their Java platforms!!   If you are a tech driven and enthusiastic individual this is the role for you!!   Requirements:   Strong experience in automation testing - building and implementing frameworks etc Strong experience working with Java/C# Experience with JavaScript Experience working in capital markets finance Experience with performance testing   If this sounds like you then please do not hesitate to reach out!

JWT/JSON Developer Location: London - Hybrid/2 days per week onsite Contract Length: 6 months Day Rate: Up to £650 a day (Outside IR35) We're supporting a leading UK financial services organisation in the search for an experienced JWT/JSON Developer to join a high-performing engineering team on an initial 6-month contract. This role will focus on authentication, authorisation and secure service-to-service communication across a large-scale digital platform. You'll be working on OAuth 2.0 and OpenID Connect (OIDC) implementations, JWT-based authentication, and integrations with identity providers within a modern cloud-native environment. Key Responsibilities Develop and maintain authentication and authorisation services Implement OAuth 2.0 and OIDC integrations with identity providers Work with JSON Web Tokens (JWTs), including issuance, validation, signing and key management Contribute to CI/CD pipelines and trunk-based delivery practices Write and review...

JWT / JSON Developer Location: London - Hybrid / 2 days per week onsite Contract Length: 6 months Day Rate: Up to £650 a day (Outside IR35) We 're supporting a leading UK financial services organisation in the search for an experienced JWT / JSON Developer to join a high-performing engineering team on an initial 6-month contract. This role will focus on authentication, authorisation and secure service-to-service communication across a large-scale digital platform. You 'll be working on OAuth 2.0 and OpenID Connect (OIDC) implementations, JWT-based authentication, and integrations with identity providers within a modern cloud-native environment. Key Responsibilities Develop and maintain authentication and authorisation services Implement OAuth 2.0 and OIDC integrations with identity providers Work with JSON Web Tokens (JWTs), including issuance, validation, signing and key management Contribute to CI/CD pipelines and trunk-based...

Senior Java Developer - Outside IR35 - Up to £700 per day We have partnered with a leader in the financial services sector who is looking for experienced Senior Java Engineers to join their Settlements team . This is a hands-on engineering role focused on developing and enhancing software supporting complex post-trade and settlement workflows . you'll work as part of an experienced engineering team, contributing to both new and existing systems within a fast-moving financial markets environment. The Role Develop and maintain Server Side Java/JVM applications supporting settlement and post-trade processes. Build robust, scalable services using Spring and Spring Boot . Work across greenfield and brownfield development projects. Collaborate with engineers and business stakeholders to understand requirements and deliver effective solutions. Contribute to technical design, development, testing and production delivery. Work with Kubernetes, event-driven...

Senior C# Developer - Investment Banking £750/day | Outside IR35 | 12-month rolling contract | Largely Remote If you're a strong C# engineer with genuine Event Sourcing experience and interested in a long term banking project, get in touch I'm working with a leading investment bank looking for a strong Senior C# Developer to join a long-term project building and enhancing a large-scale Structured Notes platform. This is a hands-on engineering role with approximately 80% Back End C#/20% frontend, working on complex, distributed systems. The role: You'll be working across a modern .NET platform, designing and developing scalable Back End services while contributing to the Angular Front End where required. The environment involves large-scale distributed systems, asynchronous processing, Multithreading and event-driven architecture. Core technical requirements: Excellent C#/.NET development experience Strong .NET 8 knowledge Previous commercial Event...

Senior DevSecOps Engineer AWS | EKS | Platform Security | Financial Services ?? Location: London/Hybrid ?? Day Rate: Up to £650 (OUTSIDE IR35) ?? Contract: Initial 6 Months We're supporting a major financial services organisation delivering a next-generation cloud platform that will underpin multiple strategic programmes and engineering teams. As a result, we're looking for a hands-on DevSecOps Engineer to join the platform security function and help build the guardrails, controls and automation that allow product and engineering teams to scale securely by default. This is an engineering-first role focused on AWS, Kubernetes, CI/CD security and platform protection. You'll work alongside Platform Engineering, Developer Platform and Security Architecture teams to ensure security is Embedded into the platform rather than bolted on afterwards. What You'll Be Doing Engineering and maintaining security controls across a multi-tenant AWS platform Implementing and...

Senior DevSecOps Engineer AWS | EKS | Platform Security | Financial Services Location: London/ Hybrid Day Rate: Up to £650 (OUTSIDE IR35) Contract: Initial 6 Months We 're supporting a major financial services organisation delivering a next-generation cloud platform that will underpin multiple strategic programmes and engineering teams. As a result, we 're looking for a hands-on DevSecOps Engineer to join the platform security function and help build the guardrails, controls and automation that allow product and engineering teams to scale securely by default. This is an engineering-first role focused on AWS, Kubernetes, CI/CD security and platform protection. You 'll work alongside Platform Engineering, Developer Platform and Security Architecture teams to ensure security is embedded into the platform rather than bolted on afterwards. What You 'll Be Doing Engineering and maintaining security controls across a multi-tenant AWS...

Senior Java Developer - Outside IR35 - Up to £700 per day A leading organisation in the financial services sector is looking for experienced Senior Java Developers to join its engineering teams, working on bespoke software solutions across complex financial markets environments. This is a hands-on development role, with a strong focus on server-side Java/JVM , working across greenfield and brownfield projects. You'll need to be comfortable working with ambiguity, taking ownership and delivering solutions in a fast-moving environment. The Role Develop server-side Java/JVM applications across financial services and trading environments. Work across the full software development lifecycle, from technical design through to implementation and production. Work with Linux, Kubernetes, event-driven architecture and cloud infrastructure . Collaborate with engineering teams and stakeholders to solve complex technical problems. Take ownership of issues and drive them...

Full Stack Software Engineer (.NET) Location: Leeds/London (2 days per month onsite) Rate: £500 per day Engagement: Contract IR35 Status: Outside Start Date: ASAP Duration: 6 months with high likelihood of extension Overview Brio Digital is supporting a major NHS digital transformation programme via a delivery partner and we are looking for experienced Full Stack .NET Developers. You'll be working on the development and enhancement of critical healthcare applications, helping deliver scalable, secure, cloud-native solutions that directly support NHS services and patient outcomes. This is an excellent opportunity for developers who enjoy working across the full stack, with a strong Microsoft technology background and modern Front End expertise. Software Engineer Key Responsibilities: Design, develop and maintain enterprise-grade applications using .NET technologies Build and enhance responsive Front End applications using React and TypeScript...

Senior Backend AI Engineer - Contract £600 - £625 per day Outside IR35 Fully Remote - UK We're looking for an experienced Senior Backend AI Engineer to join a technical team building production-grade software with AI capabilities. This is primarily a backend engineering role , rather than a pure AI/ML position. You'll be responsible for designing and delivering reliable Python services while integrating modern LLM capabilities where appropriate. You'll have a high level of technical ownership and will be comfortable reviewing code, making engineering decisions and taking features through to production. What We're Looking For Strong commercial Python engineering experience FastAPI and asynchronous Python Experience building and supporting production APIs/services Strong approach to testing, typed code and maintainability Experience owning code quality and conducting senior-level code reviews AWS or similar cloud experience...