1 to 25 of 26 Permanent Legacy Code Jobs in the UK

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 ...

electrical drawings and system schematics Attending customer sites as required, representing the business professionally and living the company's values Reviewing, maintaining and updating legacy code where necessary Conducting system analysis and development, often working independently Testing and validating software to ensure full compliance with FDS and test … plans Producing clear, consistent and well structured code documentation aligned with best practice and company standards Experience: HNC, HND or Degree in Computer Science, Software Engineering, Electrical Engineering or Electronic Engineering Strong IT skills, including word processing, spreadsheets and databases Proven experience with PLC programming in a customer focused ...

untangling complex systems and modernising core infrastructure without breaking production. This is an exciting opportunity to modernise core C#/SQL systems! Extract legacy business logic, build clean services, and verify changes in shadow mode with zero downtime to revenue flows. Extract business rules scattered across C#, embedded JavaScript … rules assemblies. Build new services cleanly. with proper Dependency Injection (DI), robust authentication/authorization, structured logging, and full observability. Work fluently across both legacy .NET Framework 4.8 (ASP.NET MVC5, WebAPI 2, EF6) and modern .NET, as both will coexist for the whole transition period. Navigate across the multiple ...

pair programming, mob programming, and test‐first development practices Build and maintain CI/CD pipelines and deploy services to cloud environments Continuously refactor code and uphold high standards of code quality and reliability Participate in architectural and technical design discussions Collaborate closely with front‐office stakeholders … experience with event‐driven systems (event streaming and/or event sourcing) Experience with CI/CD tools and practices Strong background in refactoring legacy code and maintaining clean, maintainable systems Experience working in Agile/XP environments, ideally including mob programming Excellent communication skills with the ability ...

help build, modernise, and support business-critical Windows applications for this fantastic Software Consultancy. If you enjoy C#, SQL Server, system integrations, and transforming legacy code into clean, modern.NET solutions, this is a great opportunity to make a real impact. Work with: C#, .NET/.NET Core, WinForms ...

systems with a constant focus on testing, reliability, scalability, and maintainability. Designing, modeling, and programming in a variety of languages and technologies. Working on legacy code as well as green field development. Initiative driving projects to completion. Learning and promoting new technologies with a focus on best practices. ...

experienced engineers, lead the technical delivery of work packages, and represent the software discipline directly with customers. You'll also stay close to the code, working on embedded and GUI software in C and C++, RTOS environments, and supporting certification activity against DO-178C and similar standards. This … with requirements management tools such as DOORS, Jama or Polarion Confident working across multiple projects at once, and able to pick up and improve legacy code Due to the nature of the projects involved, you'll need to be a UK national for security clearance purposes Nice ...

join initially on a 2-year Fixed Term Contract. With a significant multi-year Billing Transformation Programme underway, the business is replacing a complex legacy billing platform with a modern enterprise solution. This is a high-impact programme to with strong investment to modernise and the chance to introduce … your time will involve working on a heavily customised, customer-specific billing platform, where logic can vary significantly between clients. You'll analyse existing code, uncover undocumented behaviours and translate this into clear documentation and understanding for both technical and business teams. You'll work closely with Billing SMEs ...

environment that values innovation, teamwork, and shared success. You love to build new things but also don’t shy away from digging into a legacy codebase. You love to work in a complex problem domain that is implemented with simple software systems You have an interest or experience ...

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 ...

lean heavily into AI‐driven development. Using Goldman Sachs' AI tooling and agentic coding assistants, you will govern multiple AI agents, rapidly comprehend large legacy codebases, generate and assess production‐quality code, and accelerate every phase of the software development lifecycle. Your Impact Drive a strategic transformation : Work … centric, AI‐driven world, and define and deliver the requirements for CTL integration. Multiply your output with AI : Orchestrate AI coding agents (e.g., Claude Code, GitHub Copilot, Devin, Gemini Code Assist) across all stages of the SDLC while maintaining mastery, quality, and production fitness over all AI‐generated ...

lean heavily into AI‐driven development. Using Goldman Sachs' AI tooling and agentic coding assistants, you will govern multiple AI agents, rapidly comprehend large legacy codebases, generate and assess production‐quality code, and accelerate every phase of the software development lifecycle. Your Impact Drive a strategic transformation : Work … centric, AI‐driven world, and define and deliver the requirements for CTL integration. Multiply your output with AI : Orchestrate AI coding agents (e.g., Claude Code, GitHub Copilot, Devin, Gemini Code Assist) across all stages of the SDLC while maintaining mastery, quality, and production fitness over all AI‐generated ...

beyond the team, and drive data-driven decisions. You love to build new things but also don’t shy away from digging into a legacy codebase. Qualifications Experience working with Python & Serverless Strong fundamental programming skills (data structures, algorithms) Excellent communication skills, both written and spoken An interest ...

client has a world-class AI solution for SAP customers looking to modernise their legacy code and optimise business processes. This client has received significant funding and has a great leadership team, putting them in a strong position to realise their ambitious business plans. They require SAP Engineers ...

drive data-driven decisions across talented colleagues. You love to build new things but also don’t shy away from digging into a legacy codebase. You will mentor builders across the company to advance from basic AI usage to sophisticated system creation, aligning with our long-term mission. #J ...

London in need of a developer to architect and enhance their regulatory reporting infrastructure. You'd be designing systems from scratch, not just maintaining legacy code. The technical challenges involve processing massive datasets, implementing robust validation protocols, and creating scalable solutions that meet strict regulatory requirements. ...

technical direction About You We're looking for an engineer with commercial experience in embedded systems who enjoys building products rather than simply maintaining legacy code. You'll ideally have experience with: Embedded C ARM-based microcontrollers Embedded firmware development Hardware debugging Sensor integration IoT or connected devices Reading ...

high-quality engineering on mature platforms. The ideal candidate will have 8-15 years of experience, strong Python skills, and comfort navigating complex legacy code. This position offers an opportunity to make architectural decisions and contribute to the company's operational growth, while working alongside senior decision-makers. #J ...

will need to be in the office twice a week. Key Responsibilities Generation of Suite Scripts to fulfil business requirements Understand, Maintain & Update Legacy Code Ability to accurately document & communicate scripts & workflows NetSuite Report Generation & Modification NetSuite System Updates - including products, classes, customers Ensuring that workflows within NetSuite ...

more modern Android development tools, including Jetpack Compose, Coroutines/Flow, MVVM, Webviews, other Jetpack libraries, and modular app architectures Ability to test code and promote a culture of testing Experience with JVM unit testing, instrumented testing, and UI regression testing Comfortable working with cutting-edge technologies and legacy code Experience in, or willingness to take on, a leadership role in team projects Rough understanding of iOS development and interest in learning more Nice to have: familiarity with Swift and ObjectiveC for iOS, Scala and Typescript for server-side development Условия: £82,000 Per year One office ...

NetSuite environment, ensuring our data and workflows are as high-performing as our team. Scripting: Generating SuiteScripts to solve business puzzles and maintaining legacy code. Optimisation: Managing system updates (products, classes, customers) and ensuring workflows run like clockwork. Data & Insights: Handling migrations, imports/exports, and building powerful reports ...

NetSuite environment, ensuring our data and workflows are as high-performing as our team. Scripting: Generating SuiteScripts to solve business puzzles and maintaining legacy code. Optimisation: Managing system updates (products, classes, customers) and ensuring workflows run like clockwork. Data & Insights: Handling migrations, imports/exports, and building powerful reports ...

business. You'll help build highly resilient APIs and backend services capable of processing millions of signalling events every day, whilst modernising legacy architecture into loosely coupled, cloud-native services that are easier to scale, maintain and evolve. This isn't a role where you'll spend months fixing … bugs in a legacy codebase. You'll be helping shape the next generation of the platform while solving the kind of scaling and reliability challenges that don't exist in smaller engineering teams. What You'll Be Doing Building scalable backend services using Python Designing robust, secure APIs powering ...

clients across the UK. You'll play a key role in developing new features, improving existing functionality and contributing to the migration of a legacy PHP application to a modern React, TypeScript and Node.js architecture. If you're looking for a role where your ideas are valued, your work … practices Maintaining and enhancing existing applications It would be great if you had experience with: PHP Linux command line Experience working within larger or legacy codebases If you feel you have the necessary skills and experience to be successful in this role click on APPLY today ...

customers and colleagues. Accountabilities Development and delivery of high-quality software solutions by using industry aligned programming languages, frameworks, and tools. Ensuring that code is scalable, maintainable, and optimized for performance. Cross-functional collaboration with product managers, designers, and other engineers to define software requirements, devise solution strategies … ensure seamless integration and alignment with business objectives. Collaboration with peers, participate in code reviews, and promote a culture of code quality and knowledge sharing. Stay informed of industry technology trends and innovations and actively contribute to the organization’s technology communities to foster a culture of technical ...