8 of 8 Legacy Systems Jobs in West Yorkshire

Senior Software Engineer to join one of their most forward-thinking teams. This role offers the chance to be part of something genuinely transformative: moving from legacy systems to a modern, cloud-native platform built with .NET 8, AWS, Docker, GraphQL and Terraform. The systems you'll help build are critical to the daily operations of … engineering, product and DevOps to shape solutions end to end. What Youll Be Doing Designing and building robust, scalable services in .NET 8 Helping drive the shift from monolithic systems to distributed, microservices-based architecture Writing clean, maintainable and well-tested code Actively contributing to code reviews, knowledge sharing and mentoring Working with a modern engineering toolset including AWS … DynamoDB, Aurora), Docker, Terraform Eventing & APIs: Kafka, GraphQL, REST CI/CD: GitHub Actions Data: PostgreSQL, DynamoDB, DocumentDB What We're Looking For Solid experience building modern, cloud-based systems using .NET and AWS Strong understanding of software design principles, clean code, and TDD Exposure to infrastructure-as-code and cloud automation (ideally Terraform) A collaborative mindset and the More ❯

office, flexible working hours The client are looking for an experienced .Net Developer to join the team and hit the ground running on the migration of legacy systems into the web, this is just 1 of a range of greenfield projects you will have to work on, their client base spans across multi-nationals and smaller UK … the .Net tech stack Solid experience with ASP.NET Core Must be comfortable working with REST API's Experience working with SQL/SQL Server Experience working with version control systems e.g Git Desirables Experience with JavaScript frameworks e.g ReactJS and AngularJS Experience with Winforms Working knowledge of NodeJS Azure DevOps What they're offering Salary More ❯

stakeholder relationships to ensure seamless cross-functional programme delivery. Your expertise in enterprise software development, integration architectures, and application lifecycle management will be instrumental in modernising legacy systems, embedding CI/CD, test automation, and DevSecOps practices while leveraging both traditional and cloud-based technologies such as .NET, SQL, and AWS. Beyond driving Agile and DevOps transformation More ❯

the testing workstream of a critical enterprise integration programme. This is a hands-on role requiring a strategic thinker who can drive quality across complex integrations between cloud-based systems, SaaS platforms, and on-premise applications. You will define and own the test strategy across system, integration, and UAT phases—ensuring robust data flows, exception handling, and end-to … certification or equivalent. Why Join? You'll be at the forefront of a strategic digital transformation programme, helping to shape scalable and future-proof integrations between modern and legacy systems. If you're delivery-focused, detail-driven, and confident leading quality in fast-paced environments, we’d love to hear from you. Apply now with your CV and More ❯

skills in a supportive environment. Their core platform is written in WinForms, and they're happy to consider developers from modern web backgrounds who are open to learning legacy technologies. You'll be supported by a collaborative team with strong focus on personal development, including access to Pluralsight and Udemy subscriptions. The role requires 3 days per week … work-life balance with hybrid flexibility. Technical Requirements: Commercial experience with C#, .NET, and SQL Server Proactive mindset and excellent communication skills Willingness to work with legacy systems alongside modern development Beneficial experience (training provided): Experience with WinForms Exposure to JavaScript frameworks This role offers excellent stability and growth potential within an established, profitable business where you More ❯

skills in a supportive environment. Their core platform is written in WinForms, and they're happy to consider developers from modern web backgrounds who are open to learning legacy technologies. You'll be supported by a collaborative team with strong focus on personal development, including access to Pluralsight and Udemy subscriptions. The role requires 3 days per week … work-life balance with hybrid flexibility. Technical Requirements: Commercial experience with C#, .NET, and SQL Server Proactive mindset and excellent communication skills Willingness to work with legacy systems alongside modern development Beneficial experience (training provided): Experience with WinForms Exposure to JavaScript frameworks This role offers excellent stability and growth potential within an established, profitable business where you More ❯

culture of CI/CD, test automation and modern practices Sharp thinking, clear communication and the ability to speak to both engineers and execs Experience managing legacy systems & a passion for building something better Want to know more? Drop me a message or apply direct - happy to run you through the scope. More ❯

Commercial bank seeking to help Britain prosper and we're transforming our products and platforms with £3bn of investment to become the bank of the future. With 789 software systems and 26,000 servers we're servicing 80,000 colleagues, 30m+ customers, and over 14m+ online users you can be confident our IT professionals have sizeable and interesting challenges … every single day. In this role, you'll deliver highly complex technical support for systems and processes in mainframe environments, focusing on decommissioning and bug fixing. You'll help maintain and help migrate services according to Group standards and policies (and to agreed service levels) and will assist with the delivery of investment funded work within mainframe environments - this … includes out of hours. Additionally, you'll provide technical support (including incident and problem resolution for systems and processes in complex environments) - again this includes out of hours support. Key responsibilities Provide support for complex environments to tight timescales. Help drive the strategy and design across the mainframe development and test estate. Work closely with key stakeholders, drive and More ❯