11 of 11 Legacy Code Jobs in London

Lead Software Engineer

Hiring Organisation
Burns Sheehan
Location
City of London, London, United Kingdom
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 ...

Senior Developer

Hiring Organisation
Edison Hill Search
Location
London, United Kingdom
Employment Type
Permanent
Salary
£70000 - £90000/annum Benefits & Equity
opportunity As a Senior C++ Developer, you won’t be maintaining legacy code or adding features at the edges. You have the option to work fully remote or partically remote with access to the clients offices. You’ll be designing and building core systems that will ultimately … highly capable, mission-driven technical team If you’re a senior C++ engineer who wants their next role to be meaningful, technically deep, and legacy-defining, this is worth a conversation. Edison Hill Search are operating and advertising as an Employment Agency for permanent positions and as an Employment ...

Senior Software Engineer

Hiring Organisation
LinuxRecruit
Location
London Area, United Kingdom
team is building systems that detect infringement, streamline R&D, and empower creators to move faster. It’s a true greenfield opportunity, no legacy code, no bureaucracy, just the freedom to solve challenging technical problems with impact. The founding team comes from some of the world’s most ...

🚀 C++ Engineer – World’s Largest (Almost!) Supercomputer

Hiring Organisation
Augmentti
Location
City of London, London, United Kingdom
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 ...

Python Developer

Hiring Organisation
Thyme
Location
London Area, United Kingdom
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 ...

.NET Developer

Hiring Organisation
Roc Search
Location
City of London, London, United Kingdom
Working On Maintaining and enhancing two internal applications used across the insurance brokerage Supporting and improving existing production systems (BAU and enhancements) Working with legacy codebases and evolving them over time Fixing issues, improving reliability, and enhancing functionality Collaborating closely with internal stakeholders and technical teams Contributing to documentation ...

Full Stack Developer (PHP, Laravel, JavaScript) - Remote

Hiring Organisation
8 Signals Limited
Location
East London, London, United Kingdom
driven applications. This is a primarily remote role with a strong full stack experience. Daily tasks include writing and maintaining clean, modular code, collaborating with team members to execute software development projects, and working to ensure optimal performance and scalability of web solutions. The role also involves front … Development with skills in HTML, CSS, JavaScript and jQuery. Supporting Front-end mobile-responsive development and cross-browser compatibility. Comfortable working in existing and legacy codebases. Writing clean, maintainable and well-structured code. Able to work independently in a remote environment. Experience with software testing, including unit or feature ...

Full Stack Developer (PHP, Laravel, JavaScript) - Remote

Hiring Organisation
8 Signals Limited
Location
Central London / West End, London, United Kingdom
driven applications. This is a primarily remote role with a strong full stack experience. Daily tasks include writing and maintaining clean, modular code, collaborating with team members to execute software development projects, and working to ensure optimal performance and scalability of web solutions. The role also involves front … Development with skills in HTML, CSS, JavaScript and jQuery. Supporting Front-end mobile-responsive development and cross-browser compatibility. Comfortable working in existing and legacy codebases. Writing clean, maintainable and well-structured code. Able to work independently in a remote environment. Experience with software testing, including unit or feature ...

.NET Developer (Full Stack)

Hiring Organisation
Pharmica
Location
London, South East, England, United Kingdom
Employment Type
Full-Time
Salary
£45,000 - £60,000 per annum
C# and .NET 10+ (Minimal APIs, Blazor) Modern frontend: Svelte, Solid, HTMX, Astro, Tailwind CSS MSSQL Server AWS services (S3, CloudFront, Lambda, CloudWatch, WAF) Legacy codebase (VB.NET, .NET Framework 4.8.1, WebForms). We're migrating away and should be done within 12 months, but you'll need to work … it. We want someone who keeps up with the industry, gets excited by new tech, but also isn't afraid to dig into a legacy VB.NET codebase and figure out how to migrate it properly. If you spend your free time tinkering with side projects or reading about ...

C# .NET Core Developer - Hybrid - Banking

Hiring Organisation
GCS
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
£400 - £415/day Inside IR35
stack (.NET Framework/.NET Core, HTML/CSS/TypeScript/React, Python, SQL Server, Oracle). The role focuses on refactoring legacy systems to reduce technical debt, improve reliability and performance, and embed modern security patterns across the service estate. Tasks Design, build, and maintain server-side …/TypeScript, Python, and relational databases (SQL Server, Oracle); contribute to API and UI development, data access layers, and integration points. Refactor and modernise legacy codebases: modularisation, dependency updates, performance tuning, improved observability, and raising automated test coverage within CI/CD. Embed modern security patterns and controls across ...

Oracle Batch Developer

Hiring Organisation
KBC Technologies UK LTD
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
Salary negotiable
supporting batch processes and high-volume OLTP systems in either Oracle custom or Oracle Apps EBS. Strong analytical skills required - including analysis of legacy codeset, working within a multi-disciplinary teams to impact requirements, input into solutioning process to drive out technical options, hands-on prototyping of potential solution … approaches. Capability to produce robust, highly performant code, experience of and capability with performance testing in a high-volume environments. ...