11 of 11 Legacy Code Jobs in London

Oracle Batch Developer

Hiring Organisation
Experis
Location
City of London, London, United Kingdom
Employment Type
Contract
Contract Rate
£510/day
shell script -based batch processes. Support a high-volume OLTP environment across custom Oracle applications and Oracle E-Business Suite. Analyse and modernise legacy code , working within multi-disciplinary teams to understand requirements, propose technical options, and prototype solution approaches. Deliver robust, performant code and conduct performance … Experience developing and supporting batch workloads and high-volume OLTP systems within Oracle custom or Oracle Apps/EBS environments. Proven analytical capability, including: Legacy code analysis Working with multidisciplinary teams Providing technical input into solution design Rapid prototyping of solution approaches Ability to deliver highly performant, resilient ...

Senior Software Engineer

Hiring Organisation
Burns Sheehan
Location
London Area, 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 ...

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 ...

.NET Developer

Hiring Organisation
Avanti
Location
London, South East, England, United Kingdom
Employment Type
Full-Time
Salary
£55,000 - £65,000 per annum
highly capable engineering function, working closely with other senior engineers, a dedicated frontend team, QAs, platform engineers and product specialists. This is not legacy work. Everything is being built fresh with modern tools, strong engineering principles and a clear product vision. Tech Stack • .NET 8 • Azure (Functions, cloud-native … Join? • Fully modern engineering environment • Greenfield build with real architectural influence • High autonomy and a collaborative, transparent culture • Interesting technical challenges at scale • No legacy code • Strong investment in engineering best practices Package • Up to £65,000 salary • 10 percent bonus • Fully remote • 27 days holiday + bank ...

Principal Engineer React, Typescript, C#, AWS (Serverless), MySQL

Hiring Organisation
Smart Sourcer Limited
Location
City of London, London, United Kingdom
Employment Type
Permanent
secure, event-driven systems. Embed testing-first practices (TDD/BDD, contract tests, Jest/RTL, Playwright/Cypress, xUnit/NUnit) to raise code quality. Implement modern CI/CD (GitHub Actions) and Infrastructure as Code (Terraform, CloudFormation, AWS CDK). Model secure-by-design principles; ensure … PoCs, and unblock complex problems across squads. Champion Always ship each cycle; partner with Product to balance scope, delivery, and quality. Drive modernisation: sunset legacy code, reduce tech debt, and improve performance, reliability, and observability. Who Were Looking For: Highly experienced full stack engineer with strong proficiency ...

🚀 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 ...

Digital Web Manager

Hiring Organisation
Bromcom Computers Plc
Location
Bromley, London, United Kingdom
Employment Type
Permanent
integration with Dynamics 365 and Power BI. Own website performance, accessibility, and SEO optimisation. Oversee ongoing maintenance, updates, and documentation to avoid legacy code issues. Skills & Experience Essential Experience leading website redevelopment or CMS migration projects. Knowledge of CMS platforms such as Optimizely, Umbraco, or WordPress. Working knowledge ...

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 ...

Middle Office Software Engineer

Hiring Organisation
Durlston Partners
Location
London Area, United Kingdom
confidently. You’ll design and deliver scalable, reliable architectures while balancing strategic quality with tactical speed, and knowing when to modernise vs build around legacy code. What you’ll bring 3–6 years’ software engineering experience, ideally CompSci background. Strong Python + C# experience. Exposure to either valuations, Risk ...

Founding Full-Stack Engineer

Hiring Organisation
VIA MATCH LIMITED
Location
London, South East, England, United Kingdom
Employment Type
Full-Time
Salary
£80,000 - £100,000 per annum
will shape architecture, tooling, and engineering culture, working closely with the CEO and Head of Technology. If you are looking for a large legacy codebase and rigid process, this role is not for you. If you want to ship, break things, fix them, and build something from ...

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 ...