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 ...

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. ...

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 ...

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 ...

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 ...

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 ...

codebase, where you will take part in every step of the development process, from ideation to maintenance. Your expertise will guide architectural decisions, ensure code quality, and mentor fellow engineers, promoting a culture of technical excellence and innovation. What You’ll Be Doing Backend Stability & Scalability: Understand the existing … technical environment with ease. Technical Leadership: Inspire and guide the organization with your knowledge of how to solve complex architectural challenges and naturally untangle legacy systems. Best Practices & Infrastructure: Help lead the technical direction of the team through the adoption of engineering best practices, robust tooling, and Infrastructure ...

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 ...