8 of 8 Legacy Code Jobs in London

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 ...

level ownership Clear path into a future Head of Engineering role (if you want) Early customers already live You wouldn’t be inheriting a legacy codebase — you’d be helping decide what gets built and how . 🧠 This would suit you if you: Want real ownership , not just tickets ...

refactoring high-activity tables to improve performance and maintainability Developing frameworks and tooling for real-time monitoring of trading systems Modernising and upgrading legacy codebases, driving best practices in .NET development What We're Looking For: Expert .NET Developer: Deep knowledge SQL Server Proficiency: Strong fundamentals in querying, table ...

drive a large-scale refactoring initiative across a complex, multi-service platform. This is a hands-on role for someone who enjoys untangling legacy code, improving architecture, and leaving systems in a measurably better state than they found them. You'll combine deep engineering capability with pragmatic technical … ownership of significant refactoring or modernisation programmes Background in microservices and distributed architectures Track record improving scalability and performance in production systems Experience moving legacy estates toward modern designs We are an equal opportunities employer and welcome applications from all suitably qualified persons regardless of their race, sex, disability ...

their fields, pushing the boundaries of technology and finance every day. Innovation & Impact: Work in a modern, young codebase with minimal legacy code and technical debt. You’ll have the freedom to choose the best technology for the job, allowing you to innovate and deliver at an unmatched ...

Observability: Incorporating robust monitoring, alerting, and reliability into every service. Engineering Culture: Open Source friendly (internal and external) with a pragmatic approach to improving legacy code. Deep understanding of financial systems What’s on Offer Competitive salary and benefits package. Discretionary performance-related bonus. Dedicated budget for continued development ...

Java 21, Kafka, Postgres, Docker, Terraform Frontend: SolidJS, TypeScript Infra: AWS (Serverless & Containers), Confluent AI Ops: Heavy daily use of AI Coding Assistant (Claude Code) Who You Are Keep current with tech advancements and think forward Flow state is in architecture, managing agents, code quality - not just writing … code Proactively automate workflows and hate manual work AI can solve Thrive in early-stage environments, driven by impact Eager to learn, aware of blind spots, build great team camaraderie Must-Haves Polyglot mindset - read and review Java 21 (Node, Python, Go experience welcome) Frontend experience in SolidJS preferred ...