16 of 16 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 ...

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 ...

will take ownership of modularizing large existing codebases and setting up the architecture for new projects from scratch. You will work closely with code, design and art teams to ensure our technical pipeline is scalable, maintainable, and efficient. The ideal candidate is an expert in software design patterns … define coding standards and mentor the team toward a cleaner, more robust code infrastructure. Responsibilities Architect and build scalable game systems from the ground up for new, greenfield projects, ensuring they are built on a solid, future-proof foundation. Lead the refactoring of legacy code, transitioning monolithic ...

business value Your experience should include... 7+ Years of experience in a similar role. Deep, hands-on experience refactoring, stabilising, and instrumenting large, monolithic, legacy codebases. Expertise in PHP is ideal, but deep experience with other stacks like Java/C#/.NET is transferable Demonstrated ability to move ...

business value Your experience should include... 7+ Years of experience in a similar role. Deep, hands-on experience refactoring, stabilising, and instrumenting large, monolithic, legacy codebases. Expertise in PHP is ideal, but deep experience with other stacks like Java/C#/.NET is transferable Demonstrated ability to move ...

Agile Coding is a small Java consulting company servicing European clients. We are expanding our team to help support the Java code base of a product within the large European company (SAP). We are looking to employ an experienced Java Developer with the following attributes: Minimum 5 years … Teams meetings IDE - Preferably IntelliJ IDEA Good communication skills. Responsibilities Experienced Java/Spring expert required to help with upgrading and enhancing an existing legacy code base using modern practises. Extensive use of unit and integration tests. Location This is a fully remote role although ...

Agile Coding is a small Java consulting company servicing European clients. We are expanding our team to help support the Java code base of a product within the large European company (SAP). We are looking to employ an experienced Java Developer with the following attributes: Minimum 5 years … Teams meetings IDE - Preferably IntelliJ IDEA Good communication skills. Responsibilities Experienced Java/Spring expert required to help with upgrading and enhancing an existing legacy code base using modern practises. Extensive use of unit and integration tests. Location This is a fully remote role although ...

comfortable with Teams meetings IDE - Preferably IntelliJ IDEA Responsibilities Experienced Java/Spring expert required to help with upgrading and enhancing an existing legacy code base using modern practises. Extensive use of unit and integration tests. Location This is a fully remote role although one or two team ...

business value Your experience should include... 7+ Years of experience in a similar role. Deep, hands-on experience refactoring, stabilising, and instrumenting large, monolithic, legacy codebases. Expertise in PHP is ideal, but deep experience with other stacks like Java/C#/.NET is transferable Demonstrated ability to move ...

business value Your experience should include... 7+ Years of experience in a similar role. Deep, hands-on experience refactoring, stabilising, and instrumenting large, monolithic, legacy codebases. Expertise in PHP is ideal, but deep experience with other stacks like Java/C#/.NET is transferable Demonstrated ability to move ...

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 ...

daily Why this role is different Massive autonomy - you're not one of 20 engineers; your work is the work Greenfield build - no Legacy code to untangle Direct access to technical leadership Clear, valuable real-world use case Hybrid flexibility after the first month If you enjoy creating ...

daily Why this role is different Massive autonomy - you're not one of 20 engineers; your work is the work Greenfield build - no legacy code to untangle Direct access to technical leadership Clear, valuable real-world use case Hybrid flexibility after the first month If you enjoy creating ...

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 ...