1 to 25 of 46 Legacy Code Jobs in the UK

as its key differentiator they're looking to further grow and diversify their SaaS solutions offering.In this role, you'll take ownership of both new and existing systems, maintaining legacy code where needed while leading the design and development of new solutions. You'll work closely with the Head of Software to align on technical direction, while taking … PHP Developer looking for ownership over development and direction in a role that offers support, progression, and development opportunities. The Role: *Take ownership of new and existing systems, including legacy code, and lead development of a new software suite*Build, maintain, and improve Laravel applications, including APIs and third-party integrations*Make technical decisions to guide the growth More ❯

its key differentiator they're looking to further grow and diversify their SaaS solutions offering. In this role, you'll take ownership of both new and existing systems, maintaining legacy code where needed while leading the design and development of new solutions. You'll work closely with the Head of Software to align on technical direction, while taking … PHP Developer looking for ownership over development and direction in a role that offers support, progression, and development opportunities. The Role: *Take ownership of new and existing systems, including legacy code, and lead development of a new software suite *Build, maintain, and improve Laravel applications, including APIs and third-party integrations *Make technical decisions to guide the growth More ❯

work in Cheshire) Fed up with "agile sprints" where nothing actually ships? Here's something different. Medical device manufacturer needs an embedded firmware engineer who can work with real code, not just talk about it. The work: Life-support equipment. Oxygen systems, breathing devices - stuff that actually matters. You'll be debugging and improving legacy C code … But as long as the projects get completed, the Manager is flexible in terms of where you work. What you get: £70k + benefits. The satisfaction of knowing your code keeps people alive. No corporate buzzword bingo. You'll love this if you: Write solid C for embedded systems and don't need to be told why malloc() is … a bad idea in safety-critical firmware Have 5+ years in a regulated industry - aerospace, automotive, medical, defence Enjoy the detective work of legacy code - understanding why it was built that way, and how to improve it without breaking everything Prefer solving real problems over architectural purity Want to work on medical devices without the bureaucracy of big More ❯

work in Cheshire) Fed up with "agile sprints" where nothing actually ships? Here's something different. Medical device manufacturer needs an embedded firmware engineer who can work with real code, not just talk about it. The work: Life-support equipment. Oxygen systems, breathing devices - stuff that actually matters. You'll be debugging and improving legacy C code … But as long as the projects get completed, the Manager is flexible in terms of where you work. What you get: £70k + benefits. The satisfaction of knowing your code keeps people alive. No corporate buzzword bingo. You'll love this if you: Write solid C for embedded systems and don't need to be told why malloc() is … a bad idea in safety-critical firmware Have 5+ years in a regulated industry - aerospace, automotive, medical, defence Enjoy the detective work of legacy code - understanding why it was built that way, and how to improve it without breaking everything Prefer solving real problems over architectural purity Want to work on medical devices without the bureaucracy of big More ❯

to attract the best talent on the 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 the worlds most More ❯

to attract the best talent on the 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 the worlds most More ❯

to attract the best talent on the 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 the worlds most More ❯

to attract the best talent on the 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 the worlds most More ❯

and use it is essential to realising that potential. OQC is looking for a Senior Software Engineer to join our team to drive the scaling and development of our code and ensure that OQC is able to offer a truly seamless Quantum Computing experience both via the cloud and direct access via data centres. This is a chance to … stepping out of your comfort zone to drive forward projects. You have led projects through the entire development lifecycle and are ready to take on maintaining, debugging and improving legacy code as well as being able to develop innovative solutions from the ground up. Ensuring best practice and appropriate methodology is built into every project; you use your … and balancing risks against progress in projects. Owning technical problems and the development lifecycle to solve these challenges through to final product deployment and beyond. Developing, debugging and maintaining code and ensuring the thorough testing of both your own and other team members work. Evaluating the expected and actual outcomes of your team's projects; ensuring the delivered work More ❯

minded and love solving messy, complex problems You thrive in small teams where ideas move from whiteboard → production in hours You want to build something meaningful, not just maintain legacy code, with a love for building 0-1 products. 📍 London (4 days a week building together onsite) 💰 Up to £130,000 + meaningful early-stage equity % If you More ❯

minded and love solving messy, complex problems You thrive in small teams where ideas move from whiteboard → production in hours You want to build something meaningful, not just maintain legacy code, with a love for building 0-1 products. 📍 London (4 days a week building together onsite) 💰 Up to £130,000 + meaningful early-stage equity % If you More ❯

from day one, both inside and outside of development. We are looking for somebody with a proactive, solution-oriented mindset who can contribute to both new system development and legacy system enhancements, with a demonstrated ability to identify and implement improvements in team processes and procedures. Outside of development there is opportunity to coordinate with our Sales and QA … and helping to drive the project(s) forward. Managing and mentoring software developers. Setting and maintaining architectural standards. Writing and reviewing code. Creating a long-term strategy for modernising legacy code base. Collaborating with cross-functional teams. Building strong relationships with customers. Customer site visits, conference visits and supporting at product user groups. The above list is not More ❯

is discovered, protected, and accelerated. The 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 respected technology companies and More ❯

is discovered, protected, and accelerated. The 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 respected technology companies and More ❯

by colleagues who are at the top of 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 scale. They More ❯

by colleagues who are at the top of 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 scale. They More ❯

CMS governance, analytics setup (GA4, GTM), and 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 of HTML, CSS More ❯

accelerate transformation, and finally bring clarity to complex systems. The role Take your SAP and ABAP experience into a next-generation environment where the focus isn’t on maintaining legacy code, but on building smarter ways of understanding and improving enterprise systems . You’ll collaborate with a small, ambitious team blending deep technical know-how with automation More ❯

accelerate transformation, and finally bring clarity to complex systems. The role Take your SAP and ABAP experience into a next-generation environment where the focus isn’t on maintaining legacy code, but on building smarter ways of understanding and improving enterprise systems . You’ll collaborate with a small, ambitious team blending deep technical know-how with automation More ❯

accelerate transformation, and finally bring clarity to complex systems. The role: Take your SAP and ABAP experience into a next-generation environment where the focus isn't on maintaining legacy code, but on building smarter ways of understanding and improving enterprise systems . You'll collaborate with a small, ambitious team blending deep technical know-how with automation More ❯

the next generation of our platforms and applications that power the UK Legal and Property sectors. This is a full-stack role where you’ll work across modern and legacy technologies to deliver high-performing, secure, and scalable software. You’ll lead projects end-to-end—from concept to deployment—while championing best practice, mentoring developers, and contributing to … our strong engineering culture. Working within an Agile environment, you’ll collaborate with Product, Architecture, and cross-functional teams to deliver new features, improve code quality, drive innovation, and continually enhance the developer experience. What you’ll do Design, develop, and maintain high-quality applications using a diverse tech stack (.NET, C#, TypeScript/JavaScript, SQL/Postgres, AWS … technical delivery of new features and greenfield development across our platforms. Engage in Agile planning, estimation, and design discussions to shape solutions and deliver to agreed timeframes. Contribute to code reviews and promote engineering excellence, performance, security, and reliability. Troubleshoot, investigate, and resolve complex technical issues across our systems. Support out-of-hours deployments during scheduled release cycles. Mentor More ❯

millions. This is a modern environment where engineering standards matter — you’ll work with React, TypeScript, and Azure-based microservices in a product-led setup that values autonomy, clean code, and great UX. You’ll be joining a cross-functional team that blends speed and quality, shipping products that solve real customer problems at scale. Expect modern tooling, CI … performant, scalable, and intuitive UIs using React and modern front-end tooling. Collaborating closely with engineers, designers, and product managers to deliver high-impact features. Writing clean, testable, maintainable code with a focus on performance and accessibility. Helping shape engineering standards, best practices, and architecture across multiple products. Working in a fast-moving Agile environment with CI/CD … automated testing, and code reviews at the core. What We’re Looking For Deep expertise in React , JavaScript/TypeScript, and modern front-end frameworks. Experience working with RESTful APIs and building rich, data-driven interfaces. Knowledge of cloud environments (Azure or AWS) and CI/CD pipelines (GitHub Actions, Jenkins, etc.). Familiarity with .NET environments and SQL More ❯

doing: Designing, developing, and maintaining pricing libraries for commodity products Building and supporting risk management tools and analytics platforms Taking models from prototype to production - writing robust, scalable Python code Collaborating with quantitative analysts to implement models and frameworks Interacting with some legacy codebases, ideally in another OOP language (C C#/Java) What they’re looking for … Solid professional experience as a Quant Developer (or software developer with mathematical background) Strong programming skills in Python, with the ability to write production-grade code Experience with at least one other OOP language (C++, C#, or Java) Background in commodities trading, risk, or pricing Familiarity with numerical libraries, performance optimisation, and clean software design principles Confident working closely More ❯

doing: Designing, developing, and maintaining pricing libraries for commodity products Building and supporting risk management tools and analytics platforms Taking models from prototype to production - writing robust, scalable Python code Collaborating with quantitative analysts to implement models and frameworks Interacting with some legacy codebases, ideally in another OOP language (C C#/Java) What they’re looking for … Solid professional experience as a Quant Developer (or software developer with mathematical background) Strong programming skills in Python, with the ability to write production-grade code Experience with at least one other OOP language (C++, C#, or Java) Background in commodities trading, risk, or pricing Familiarity with numerical libraries, performance optimisation, and clean software design principles Confident working closely More ❯

Next.js & WordPress Developer £40,000–£45,000 If you enjoy building slick, modern websites without being chained to legacy codebases or endless ticket queues, keep reading. We’re working with a small-but-mighty digital agency in Birmingham that punches well above its weight. Their builds are sharp, fast, and not cobbled together with page builders and duct tape. … front-ends, and smart UX baked into everything. They’re looking for a developer who knows their way around both WordPress and Next.js and React enjoys clean front-end code, and doesn’t need to be micromanaged every 10 minutes. What you’ll actually be doing: Building bespoke websites using WordPress (custom themes, not off-the-shelf fluff) Shipping … You’ll fit right in if: You’ve worked in a digital agency or fast-paced studio before You take pride in your craft and care about clean, readable code You don’t need a brief 10 pages long to get cracking You enjoy working with designers to make sure the final build actually looks like the mockup You More ❯