7 of 7 Permanent Legacy Code Jobs in London

designs, and the development team, who deliver them. You will turn HLDs into well-documented, implementable designs (Low-Level Design) and make sure the code that results is consistent, secure and maintainable. About Bestway Bestway Group is a diversified multinational family owned business with annualised turnover in excess … communities through its operations across the UK, Pakistan and the Middle East Responsibilities: Application & low-level design: Own component-level (C4 Level 3) and code-level (C4 Level 4) design and LLDs for our applications. Translate Solution Architects HLDs into clear implementation designs, and make sure the team understands ...

workflows, including model selection, prompt and harness engineering, tool integration and reusable skills. Support the adoption of AI across the SDLC, including test generation, code review, documentation, legacy code understanding and modernisation. Run structured proofs of value with clear hypotheses, baselines, success criteria and evidence-based outcomes. … integrating agents with tools and services. Strong prompt engineering and harness engineering experience. Experience with AI coding and agent tooling such as Claude Code, GitHub Copilot, Codex, Kiro or MCP. Knowledge of applying AI across the software development lifecycle. Experience defining engineering standards, guardrails or practices adopted across multiple ...

other colleagues at a time. In addition, you'll take an active role in unlocking the potential of junior colleagues: encouraging idiomatic code, demonstrating engineering rigour, and sharing hard-won knowledge with your peers. You'll also help drive our engineering processes to maintain code quality while balancing … timescales and client requirements. Desirable Skills Professional experience in the design and implementation of complex projects, ideally both clean-slate projects and updates to legacy code bases. Comfortable with platform APIs, development environments and native debugging approaches. Experience leading a team of developers through a complete project lifecycle ...

slowing the pace of new development. Demonstrable hands-on experience applying AI to software engineering at team scale with measurable results (e.g. AI-driven code modernisation, test generation for legacy code or agentic development workflows) and an informed point of view on how AI will change both ...

Hands on experience with Kotlin for server side, or/and React and Typescript for the frontend. Proven track record of refactoring and modernising legacy codebases and architectures, improving performance and maintainability while minimising risk and customer impact. Track record of integrating and optimizing AI/ML-enabled features ...

product outcomes, designing, building and scaling services from first principles with the autonomy to make technical decisions stick.With a low-meeting culture, zero legacy code and colleagues who are all staff-level engineers with 7+ years’ experience, this is a place for experienced engineers who want to think … secure, performant and scalable services in PHP (Laravel/Symfony) and JavaScript, treating non-functional requirements as first-class problems. Write clean, well-tested code using patterns like DDD and CQRS, keeping the codebase modern through proactive refactoring and avoiding unnecessary technical debt. Collaborate with DevOps engineers to ensure ...

small- to medium-sized applications that business people use in their day-to-day work. What you will do in this rolePrimarily work on legacy code, and sometimes work on green-field development. Lead small projects to completion. Hands on with business users, sometimes collaborating with them … solutions. Strong verbal and written communication skills. Fluency in one or both of Python and C#.Ability to work with AI coding assistants (e.g. Claude Code) to accelerate software development. Bachelor's degree in Computer Science or Software Engineering (or equivalent).6+ years of Software Engineering experience. For more information ...