1 to 25 of 69 Legacy Code Jobs in London

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 ❯

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 ❯

lightly-coupled service architectures Expectations: Building systems with a constant focus on testing, reliability, scalability, and maintainability. Designing, modeling, and programming in a variety 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. Providing on-call support as More ❯

AWS Aurora) database. Additionally, we leverage AWS Lambda and Amazon API Gateway for running supplementary services. Our UI is built in React using TypeScript, with a small portion of legacy code in jQuery, which we rarely get involved with. We use Github for version control and Github Actions for building, testing and deploying code to the staging … appropriate solutions Address issues raised within the application that prevent users from achieving their goals Identify bottlenecks in the development process and suggest/implement improvements Continuously improve the code base to make it easier to understand and more fun to work with Perform self-defined tasks geared towards your personal and professional development What We Need From You More ❯

to ensure quality is baked in from the start, while championing best practices and modern QA approaches. We're a fast-moving TransitTech business with plenty of exciting challenges-legacy code, evolving architecture, and new features that need rigorous testing across web, iOS, and Android platforms. If you thrive in an environment where you can make a real More ❯

to ensure quality is baked in from the start, while championing best practices and modern QA approaches. We're a fast-moving TransitTech business with plenty of exciting challenges-legacy code, evolving architecture, and new features that need rigorous testing across web, iOS, and Android platforms. If you thrive in an environment where you can make a real More ❯

to ensure quality is baked in from the start, while championing best practices and modern QA approaches. We’re a fast-moving TransitTech business with plenty of exciting challenges—legacy code, evolving architecture, and new features that need rigorous testing across web, iOS, and Android platforms. If you thrive in an environment where you can make a real More ❯

standards, gaining valuable experience simultaneously. Our main systems consist of micro service architecture with golang applications serving iOS, Android and Web clients. We have a strong foundation of shipping code through containers using cloud native technologies, such as Kubernetes. You can check ourStacksharepage, too. Your role: – Write code that your co-workers appreciate for its readability and elegance … and solid understanding of scalability, caching and load testing – Experience in the complete software development life cycle including coding, build, test, setting up CI/CD, monitor, working with legacy code – Experience in event driven systems (RabbitMQ, Kafka or others) and handling concurrency at scale – Experience with different SQL, NoSQL and Key-Value databases as well as an More ❯

dedicated people. What you'll do: Develop new features and functionality on internal and external systems using PHP 7/8 onwards Leverage security and best practices when writing code Delivering and supporting the implementation of projects Build strong relationships with their peers as well as relevant business stakeholders both in Boots and Boots Digital Health Proactively participating in … design and code reviews to ensure quality and consistency across the product. Provide support and doing root cause analysis to investigate issues and bugs in existing code Maintaining high-quality documentation What you'll need to have Previous working experience in development including in component based architecture Experience building highly scalable apps with reusable components Knowledge of building … on experience with AWS services (EC2, RDS, SQS, SNS, S3 etc) Excellent with MySQL 5 and 8, both with and without modern frameworks e.g. Eloquent Comfortable with working on legacy code and refactoring PSR coding styles and use of tooling such as CS-Fixer, PHPStan Experience working with CI/CD pipeline tools such as GitHub Actions, Jenkins More ❯

initiatives and tech debt. Prepare documentation on the status, operation, and maintenance of software. Clearly and regularly communicate with technical support colleagues and management. Development scheduling and deployment of code sets. Participate in peer-reviews of solution designs and code reviews. Work closely with all stakeholders to troubleshoot product and systems issues, exploring solutions and implementing long-term … fixes to prevent recurrences. Skills, Knowledge & Expertise We have a Microsoft stack, so C#/.NET, Angular and Azure experience is our highest priority from a technical perspective. Legacy code or experience working with large, complex codebases is preferred. ASP.NET/.NET CORE MVC, WPF. Experience of web-related technologies (HTML, XML, CSS, JSON, JavaScript, jQuery). MS More ❯

for the bank. We are seeking a highly experienced Senior Java Lead Developer to modernize our core financial accounting systems. You will play a critical role in rewriting our legacy sub-ledger application to a modern Java-based architecture. This involves analyzing existing code, designing equivalent Java components, and ensuring a seamless transition while maintaining system functionality and … design, coding, testing, debugging, and implementation Analyze existing modules and shell scripts to design equivalent Java components Develop and implement high-performance, scalable, and secure Java applications to replace legacy code Write clean, well-documented, and testable Java code Collaborate with architects and other developers to define the migration strategy and ensure a smooth transition Work with … relational databases, primarily Sybase ASE and MS SQL, to adapt existing database schemas and queries to the new Java architecture Thoroughly test and validate the migrated Java code to ensure functional equivalence with the legacy system Troubleshoot and resolve technical issues during the migration process Participate in code reviews and contribute to improving development processes Allocate work More ❯

developer environment. Work closely with cross-functional teams to ensure effective delivery and knowledge sharing across the organisation. Support the growth of junior developers through guidance and mentorship. Perform code reviews to uphold high standards of code quality and reinforce best practices. Key Experience Required: Extensive hands-on experience with C++, including deep familiarity with commercial development environments. … continuous professional growth. Exposure to high-level languages; Python and C# experience is a plus. Familiarity with CI/CD workflows and tooling. Skilled in working with and modernizing legacy codebases. The Package: Basic annual salary up to £85,000 (dependant on experience) Occasional expensed travel for office and home working expenses. Cycle to work scheme. 25 days of More ❯

and SQL Server Enhancing user experiences with modern JavaScript/TypeScript frameworks Driving product improvements through close collaboration with Product Managers, Designers, and other Engineers Ensuring software quality through code reviews, unit testing, and best development practices Contributing to architectural decisions and mentoring junior developers Supporting DevOps processes and cloud-based deployments (bonus if familiar with Azure) Nice to … Have: Experience with PHP and legacy codebases Previous work in the financial services or SaaS industry What We’re Looking For: Proven experience as a Senior or Lead Developer working with C#/.NET Solid knowledge of SQL Server and performance optimization Proficiency in JavaScript/TypeScript and front-end development Strong problem-solving skills and the ability to More ❯

cashless payments. They're now hiring for a PHP Back-End Developer to join their remote-first team and contribute to a completely modernised Laravel-based platform with no legacy code. This is a great opportunity to work with cutting-edge tools, take ownership of clean, scalable features, and be supported in your professional growth with a tailored development … plan. Key Responsibilities: Write clean, reusable, test-driven code in PHP using Laravel (TDD, OOP best practices). Build and extend APIs, platform features, and 3rd-party integrations (e.g. payment gateways, marketing tools). Maintain platform performance and functionality through robust troubleshooting and optimisation. Collaborate with front-end, mobile, and back-end teams through daily stand-ups and monthly More ❯

and support full stack software systems in multiple languages (Python, Java, Rust, Typescript). Collaborate widely with trading desks and supporting DRW business units. Work with both greenfield and legacy code, as well as assist trading desks with taking proof of concept ideas to production. Provide on-call support as needed. Qualifications: Have a minimum of 2+ years More ❯

options trading desks, designing and supporting full-stack systems in multiple languages (Python, Java, Rust, Typescript) Collaborating with trading desks and supporting business units Working with both greenfield and legacy code, assisting in taking proof of concept ideas to production Providing on-call support as needed Qualifications: Minimum of 2+ years' experience with Java or Python, or demonstrated More ❯

as fast, hassle free processes to deliver an unbeatable customer experience. The role 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 in Functional Programming, microservices and/ More ❯

proactive and experienced Senior Android Developer to work across a portfolio of successful apps in a fun, talented team. The apps are fully native, primarily developed in Kotlin, with legacy Java code being phased out. The technologies run directly on the phone with limited server interactions. As a key member of the team, youll have a strong track … best practices. It is envisaged the role will evolve into a leadership position. Responsibilities: Build on exciting new technologies and integration with wearable devices Develop new features, improve existing code work on ambitious projects ranging from low-level algorithms to high-level system design; plus the occasional development of a prototype app Utilise the latest Android SDKs and frameworks … to implement scalable, maintainable and testable architectures Conduct code reviews and champion high-quality code by leveraging unit tests, continuous integration, and code quality tools Essential Skills and experience: 5+ years of high-level Android development experience, with a wider software engineering background (8+ years in total) Excellent Kotlin skills and comfortable with other languages e.g. Java More ❯

proactive and experienced Senior Android Developer to work across a portfolio of successful apps in a fun, talented team. The apps are fully native, primarily developed in Kotlin, with legacy Java code being phased out. The technologies run directly on the phone with limited server interactions. As a key member of the team, you’ll have a strong … best practices. It is envisaged the role will evolve into a leadership position. Responsibilities: Build on exciting new technologies and integration with wearable devices Develop new features, improve existing code - work on ambitious projects ranging from low-level algorithms to high-level system design; plus the occasional development of a prototype app Utilise the latest Android SDKs and frameworks … to implement scalable, maintainable and testable architectures Conduct code reviews and champion high-quality code by leveraging unit tests, continuous integration, and code quality tools Essential Skills and experience: 5+ years of high-level Android development experience, with a wider software engineering background (8+ years in total) Excellent Kotlin skills and comfortable with other languages e.g. Java More ❯

a focus on long-term stability and performance. Collaborate with cross-functional teams, including PO, PDEF, QA, DevOps, and product stakeholders, to define, design, and deliver new features. Refactor legacy code and participate in technical debt reduction. Write clean, scalable, and maintainable code with proper documentation. Participate in code reviews and mentor junior developers where applicable. More ❯

stack lock-in, fostering a new era of interoperable and scalable solutions. What the role involves: As a Software Engineer at IOG, you are responsible for writing high-quality code for our products. You have the exciting challenge of working with cutting-edge research and technology with a focus on the market's needs. To support you on this … proactive and require minimal supervision or mentoring to complete tasks Review specifications produced by architects and formal methods specialists Contribute to the design of algorithms Write clean, straightforward, efficient code that satisfies previously agreed acceptance criteria and specifications Commit often and submit small pull requests frequently Cover your code with unit, property and integration tests when applicable Review … the pull requests of your team mates Fix bugs in your own code and in legacy code from others Be available for emergency fixing of severity 1 issues on deployed products Integrate software components and third-party libraries Verify and deploy programs and systems Troubleshoot, debug and upgrade existing software Write documentation for the code Write More ❯

developer environment. Work closely with cross-functional teams to ensure effective delivery and knowledge sharing across the organisation. Support the growth of junior developers through guidance and mentorship. Perform code reviews to uphold high standards of code quality and reinforce best practices. Key Experience Required: Extensive hands-on experience with C++, including deep familiarity with commercial development environments. … continuous professional growth. Exposure to high-level languages; Python and C# experience is a plus. Familiarity with CI/CD workflows and tooling. Skilled in working with and modernizing legacy codebases. The Package: Basic annual salary up to £85,000 (dependant on experience) Remote working. Occasional expensed travel for office and home working expenses. Cycle to work scheme. Pension More ❯