13 of 13 Legacy Code Jobs in London

pair programming, mob programming, and test‐first development practices Build and maintain CI/CD pipelines and deploy services to cloud environments Continuously refactor code and uphold high standards of code quality and reliability Participate in architectural and technical design discussions Collaborate closely with front‐office stakeholders … experience with event‐driven systems (event streaming and/or event sourcing) Experience with CI/CD tools and practices Strong background in refactoring legacy code and maintaining clean, maintainable systems Experience working in Agile/XP environments, ideally including mob programming Excellent communication skills with the ability ...

stability and performance. Collaborate with cross-functional teams, including PO, PDEF, QA, DevOps, and product stakeholders, to define, design, and deliver new features. Refactor legacy code and participate in technical debt reduction. Write clean, scalable, and maintainable code with proper documentation. Participate in code reviews ...

market. Having received huge investment, they are on a journey to truly disrupt the industry and are not held back by any legacy code or old customers. This means that they're able to build out state-of-the-art, Greenfield code which can focus on being ...

market. Having received huge investment, they are on a journey to truly disrupt the industry and are not held back by any legacy code or old customers. This means that they're able to build out state-of-the-art, Greenfield code which can focus on being ...

London team, working directly with the CTO and collaborating with colleagues in New York. This isn't a role where you'll be maintaining legacy code. You'll have real ownership over technical decisions and direct impact on the product from day one. The work spans backend services powering ...

machine learning models to run efficiently and effectively in production. 3 best things about the job Build the Future: You aren't just maintaining legacy code; you are building the "brain" of the company, working on end-to-end AI and data developments that directly impact … accelerated engineering: You are capable with using agentic coding tools and able to deliver outcomes effectively into production with tools like Claude Code, Codex, etc. Domain Passion: You should love the challenge of using data & intelligence to drive ad campaign efficiency and demonstrate the value of the investment ...

client has a world-class AI solution for SAP customers looking to modernise their legacy code and optimise business processes. This client has received significant funding and has a great leadership team, putting them in a strong position to realise their ambitious business plans. They require SAP Engineers ...

build something from scratch, and the people you build it for sit right next to you. This is a greenfield project. No legacy codebase to wrestle with, no inherited technical debt to apologise for. You are designing and building from the ground up, owning the work across the full ...

joining a trading firm that is actively overhauling its execution systems with modern technologies. That means you are not here to maintain legacy code and hope for the best. You are here to build, shape, and leave a real mark on the architecture that drives the business. … structure is flat. The CEO walks the floor. You are not buried in a hierarchy waiting for sign-off from someone who stopped writing code a decade ago. Your work has visibility from day one. And while you are absolutely in the trading space, it does not feel like ...

clients that actually matter. These are high-profile, complex projects that push what is currently possible with applied AI. You are not maintaining legacy code or retrofitting AI into something that does not want it. You are shipping real LLM-based solutions end to end, from architecture through … end. You know the full journey, not just the prototype stage. Your Python fundamentals are strong and you can write clean, reliable code without leaning on AI tools to do it for you. You understand what it takes to make these systems work in the real world, not just ...

will have real ownership, real influence on architecture and direction, and the opportunity to rebuild and redesign systems end to end rather than maintaining legacy code. What you will be working on Designing and building high performance C++ systems that sit directly in the live trading path Optimising latency ...

Understanding of model evaluation methods and metrics . Ability to operationalize non-technical ideas into relevant research designs, features, and model outputs. Experience translating code between languages (primarily R to Python) Comfort working with legacy codebase Experience writing production code, not just notebooks What Would Make ...

configuration). Contribute to the end-to-end delivery of a bespoke research and risk assessment tool built in Dynamics. Write, review, and validate code written in C#, ensuring alignment with development standards and governance. Work across both project delivery and BAU, including backlog ownership and triage support. Collaborate … software development, with strong exposure to Microsoft Dynamics and Power Platform. A solid development background in C# .Net, with the ability to understand legacy code. Experience delivering custom Dynamics solutions (not just configuration/customisation). Understanding of Power Platform (Power Apps, Power Automate, etc.) Experience working in project ...