10 of 10 Legacy Code Jobs in London

operations – a mature, revenue-generating system that has evolved over years and continues to scale. If you enjoy owning real systems, thinking architecturally, improving legacy code thoughtfully rather than rewriting it, and being trusted to deliver without heavy supervision, this role will feel unusually well-matched. The role … calm, root-cause mindset Incrementally improving system architecture using sound design principles (including modular design, DDD-style thinking, and pragmatic architectural patterns) Reviewing code, raising standards constructively, and contributing to a disciplined engineering culture Leveraging modern tooling (including AI-assisted development) to improve quality and velocity This ...

analysis, implementation, testing, refactoring, unit testing, and documentation Review and strengthen AI‐generated output rather than relying on it blindly Write maintainable, production‐grade code and automated tests Make sound technical decisions across architecture, performance, security, and maintainability Help raise the bar for AI‐native engineering practices across … organisation What we value Strong engineering fundamentals Ability to produce significantly more engineering output by orchestrating AI tools effectively, not simply writing code faster manually High ownership Fast execution with quality Sound judgment Comfort operating in real production complexity Business‐result orientation Experience building and shipping production software Demonstrated ...

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 ...

systems with a constant focus on testing, reliability, scalability, and maintainability. Designing, modeling, and programming in a variety of languages and technologies. Working on legacy code as well as green field development. Initiative driving projects to completion. Learning and promoting new technologies with a focus on best practices. ...

reviews. Excellent written communication skills, with confidence working independently across time zones. Comfort balancing feature delivery with live system support and working across both legacy codebases and greenfield development. Why you'll love this job Work on a platform that powers billions of mission-critical customer conversations for major ...

lean heavily into AI‐driven development. Using Goldman Sachs' AI tooling and agentic coding assistants, you will govern multiple AI agents, rapidly comprehend large legacy codebases, generate and assess production‐quality code, and accelerate every phase of the software development lifecycle. Your Impact Drive a strategic transformation : Work … centric, AI‐driven world, and define and deliver the requirements for CTL integration. Multiply your output with AI : Orchestrate AI coding agents (e.g., Claude Code, GitHub Copilot, Devin, Gemini Code Assist) across all stages of the SDLC while maintaining mastery, quality, and production fitness over all AI‐generated ...

lean heavily into AI‐driven development. Using Goldman Sachs' AI tooling and agentic coding assistants, you will govern multiple AI agents, rapidly comprehend large legacy codebases, generate and assess production‐quality code, and accelerate every phase of the software development lifecycle. Your Impact Drive a strategic transformation : Work … centric, AI‐driven world, and define and deliver the requirements for CTL integration. Multiply your output with AI : Orchestrate AI coding agents (e.g., Claude Code, GitHub Copilot, Devin, Gemini Code Assist) across all stages of the SDLC while maintaining mastery, quality, and production fitness over all AI‐generated ...

engineering team and work directly with the CTO on the systems that sit at the heart of the product. This isn’t about maintaining legacy code or picking up tickets. It’s about building, improving, and scaling a platform that directly impacts customer experience and revenue. The environment ...

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 ...

understand priorities, influence the roadmap, and maintain a balance between new features and technical foundations. Adopt a DevOps mindset, taking full ownership of code from idea to deployment, including AWS solution design, security, and observability. Support growth of teammates through code reviews, pair programming, and knowledge sharing; foster … technical decisions independently while working closely with teammates to deliver solutions from idea to production. Experience improving or evolving existing systems, including working with legacy codebases and simplifying or automating manual workflows. Benefits 25 days annual leave with option to buy/sell more days Adoption and fertility leave ...