23 of 23 Legacy Systems Jobs in West Yorkshire

Services — a business that processes over 200,000 vehicles a year for the UK’s leading manufacturers, finance, and rental companies. We’re not just maintaining legacy systems — we’re transforming. You’ll be at the heart of a major tech shift: moving from .NET Framework monoliths to microservices in .NET 8, AWS, Docker, GraphQL, and Terraform … PostgreSQL, GraphQL, React, GitHub Actions What You Bring: Hands-on experience in .NET , AWS , and infrastructure-as-code ( Terraform ) Solid understanding of both SQL & NoSQL databases and event-driven systems Experience in TDD , clean code, and continuous delivery Strong communication and collaboration skills across technical and non-technical teams A proactive, curious mindset and desire to grow in a More ❯

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 ❯

Services — a business that processes over 200,000 vehicles a year for the UK’s leading manufacturers, finance, and rental companies. We’re not just maintaining legacy systems — we’re transforming. You’ll be at the heart of a major tech shift: moving from .NET Framework monoliths to microservices in .NET 8, AWS, Docker, GraphQL, and Terraform … PostgreSQL, GraphQL, React, GitHub Actions What You Bring: Hands-on experience in .NET , AWS , and infrastructure-as-code ( Terraform ) Solid understanding of both SQL & NoSQL databases and event-driven systems Experience in TDD , clean code, and continuous delivery Strong communication and collaboration skills across technical and non-technical teams A proactive, curious mindset and desire to grow in a More ❯

tech team and help modernise the business's data infrastructure. It's a great opportunity for someone who thrives on turning complex, legacy data into clean, scalable systems with a forward-thinking mindset. This is a hybrid role (2-3 days in the office), with flexibility following probation, and the opportunity to work on projects at the … be at the heart of a strategic shift. You'll be tasked with designing and maintaining robust, scalable frameworks that allow the business to unify its legacy systems with a newly built modern data platform. Your work will directly support AI-driven decision-making and unlock the potential of data across the entire organisation. What You'll … years' experience in a similar Data Engineering role Excellent SQL and relational database knowledge Strong understanding of data modelling and ETL/ELT processes Familiarity with legacy systems (ideally Progress DB or similar) Python skills for scripting and automation A collaborative attitude with strong problem-solving skills Nice to Have: Experience with hybrid cloud/on-prem More ❯

Lead Cloud & Architecture Transformation for a Financial Services Organisation Are you a technically hands-on Solutions Architect with experience in modernising legacy systems and a passion for cloud-native design? We're supporting a Financial Services company on a multi-year transformation programme as they evolve their platform architecture and modernise a key business-critical solution used … major financial institutions (think large UK banks and other FS clients) helping them streamline critical digital transactions. Specific responsibilities include: Cloud Modernisation: Lead the architecture design of a legacy .NET-based platform, moving it to Microsoft Azure, building cloud-native capabilities along the … way. Architecture Governance: Help design and implement governance frameworks, design authorities, and target-state architectures across the wider group. Legacy System Uplift: Introduce new functionality to existing systems while ensuring scalability, compliance, and long-term maintainability. Data Architecture & Compliance: Work on establishing data flow mapping, data classification, and compliance with industry regulations (e.g., ISO27001). Security by 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 ❯

You will ensure high-quality outcomes across delivery teams, managing risks, budgets, and stakeholder expectations while addressing legal, regulatory, and operational challenges. Your leadership will transform legacy systems, enabling smarter, faster access to land for infrastructure development. What will you be doing? Own the delivery of the release backlog across the entire product program, applying Agile/… no-code SaaS solutions. Skilled in Microsoft 365, Jira, Monday.com, and other project delivery tools. Preferred Experience in AI solution delivery and digital transformation, particularly modernising legacy systems or land access platforms. Background in fast-paced, start-up environments with a proactive, hands-on mindset. Familiarity with UX/UI principles and tools such as Miro, Lucid 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 ❯

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 ❯

and this role will be pivotal in supporting and leading this transformation. Key Responsibilities: Cloud Adoption: Play a central role in helping the organisation move its legacy systems to the Cloud, with the goal of making solutions cloud-native. Technical Leadership: Work on modernising the company's legacy systems, adding new functionality while ensuring More ❯

You will ensure high-quality outcomes across delivery teams, managing risks, budgets, and stakeholder expectations while addressing legal, regulatory, and operational challenges. Your leadership will transform legacy systems, enabling smarter, faster access to land for infrastructure development. What will you be doing? Own the delivery of the release backlogacross the entire product program, applying Agile/Scrum … no-code SaaS solutions. Skilled in Microsoft 365, Jira, Monday.com, and other project delivery tools. Preferred Experience in AI solution delivery and digital transformation, particularly modernising legacy systems or land access platforms. Background in fast-paced, start-up environments with a proactive, hands-on mindset. Familiarity with UX/UI principles and tools such as Miro, Lucid More ❯

and this role will be pivotal in supporting and leading this transformation. Key Responsibilities: Cloud Adoption: Play a central role in helping the organisation move its legacy systems to the Cloud, with the goal of making solutions cloud-native. Technical Leadership: Work on modernising the company's legacy systems, adding new functionality while ensuring 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 ❯

people Can bring clarity and stability to a team with big ambitions and growing demands Likes to work across the stack - and isn’t scared of legacy systems or technical debt Given the EdTech space is part of a highly regulated environment, I'm looking for candidates from similar: HealthTech, MarTech, EdTech or FinTech as they will … outcomes Visibility and communication : presenting updates at weekly company-wide meetings and feeding progress into senior leadership There is a clear desire to improve engineering output, move past legacy practices, and support a DevOps-first, test-driven approach to feature delivery. You’ll be central to making that happen. What You’ll Bring Must-haves: 5+ years of … developers - formally/informally Clear understanding of modern testing, CI/CD, and DevOps principles Confident communicating with non-technical stakeholders Nice-to-haves: Exposure to QA automation, legacy platform upgrades, or infrastructure-as-code Comfortable working in smaller product teams with a high degree of autonomy You’ll need to be comfortable presenting your work to the More ❯

and critical data assets, ensuring compliance with legal and regulatory requirements. Data Lineage and Documentation : Define and maintain data lineage to provide transparency into data flows and transformations across systems and departments. Critical Data Element (CDE) Management : Define and manage CDEs and establish governance processes around them to prioritize data quality. Data Migration Support : Ensure data migrations (e.g., from … legacy systems are carried out with full attention to data quality, security, and governance. Requirements Strong expertise in data warehouse architecture and experience with cloud-based data platforms, particularly Snowflake and Microsoft Azure. Experience designing and managing data pipelines in cloud environments, ensuring integration of data governance principles into them. Hands-on experience with data migrations, ensuring More ❯

tech stack and deliver smarter digital solutions for their customers and community. What You’ll Be Working On: Greenfield and brownfield projects across customer portals, CRM platforms, and internal systems Building modern web applications using React, .NET APIs, and Azure Working alongside a strong team of developers Designing, developing, and supporting solutions to replace legacy systems More ❯

DevOps, CI/CD, TDD/BDD, and cloud-native development practices. Technology & Operations Work closely with the Head of Architecture and Platform teams to modernise legacy systems and reduce technical debt. Promote scalability, resilience, and observability across our engineering landscape. Own SLAs, operational metrics, and runbooks for engineering-owned systems and services. Cross-functional Collaboration More ❯

tech stack and deliver smarter digital solutions for their customers and community. What You’ll Be Working On: Greenfield and brownfield projects across customer portals, CRM platforms, and internal systems Building modern web applications using React, .NET APIs, and Azure Working alongside a strong team of developers Designing, developing, and supporting solutions to replace legacy systems More ❯

opportunity to architect security across one of the UK’s most critical infrastructure environments. As a Security Architect , you’ll embed secure-by-design principles across IT and OT systems, working alongside Solution Architects and a dedicated Cybersecurity team. You’ll guide technical decisions that ensure risk, compliance, and innovation are aligned from day one. ✅ What You’ll Do … patterns, architecture principles, and frameworks. Drive security architecture across digital programmes such as ITSM (ServiceNow) and back-office modernisation. Conduct threat modelling , risk analysis, and define security requirements for systems including remote access (VPNs) and secure OT-to-IT data exchange. Ensure compliance with industry standards such as ISO27001, NIS Directive , and NCSC’s Cyber Assessment Framework (CAF) . … strategy. 🧠 What You’ll Bring 3+ years of experience as a Security Architect , ideally in enterprise or regulated environments. Deep understanding of IT/OT architecture, including air-gapped systems and the Purdue model . Experience supporting large-scale transformation programmes with cloud, infrastructure, and legacy system exposure . Familiarity with industry standards and secure system development More ❯

+ benefits depending on experience The Opportunity Fast-paced, growing ecommerce business looking for a hands-on IT Director from an ecommerce background to lead a full tech transformation. Systems are complex, with a mix of legacy and modern tech, minimal structure, and growing commercial demands. This is a high-impact role for someone who can drive … platforms to internal admin tools, infrastructure and cyber security, while directly enabling performance in ecommerce, operations, and marketing. What You'll Do * Lead the overhaul of legacy systems (.NET, Classic ASP) to modern platforms (Laravel). * Define and deliver a tech roadmap that improves speed, stability, and scalability. * Build and manage a hybrid UK/India tech … analytics capabilities. Tech Stack * Backend: Laravel (primary), bespoke PHP, .NET, Classic ASP (legacy) * Frontend: JS/CSS stack with custom integrations * Hosting: Digital Ocean + Cloudflare * Support Systems: Zendesk, Trello (ad hoc), Office 365 * Infrastructure: Internal servers accessed via VPN What You Bring * Proven leadership in ecommerce or fast-moving tech environments. * Strong PHP/Laravel skills More ❯

to login/join with: The Opportunity Fast-paced, growing ecommerce business looking for a hands-on IT Director from an ecommerce background to lead a full tech transformation. Systems are complex, with a mix of legacy and modern tech, minimal structure, and growing commercial demands. This is a high-impact role for someone who can drive … platforms to internal admin tools, infrastructure and cyber security, while directly enabling performance in ecommerce, operations, and marketing. What You’ll Do Lead the overhaul of legacy systems (.NET, Classic ASP) to modern platforms (Laravel). Define and deliver a tech roadmap that improves speed, stability, and scalability. Build and manage a hybrid UK/India tech … tech with commercial goals in ecommerce, ops, marketing, and customer service. Lay the foundation for future data and analytics capabilities. Backend: Laravel (primary), bespoke PHP, .NET, Classic ASP (legacy) Frontend: JS/CSS stack with custom integrations Hosting: Digital Ocean + Cloudflare Infrastructure: Internal servers accessed via VPN What You Bring Proven leadership in ecommerce or fast-moving More ❯

Leading the delivery of tooling in support of Access Management. Building out a suite of Access Management capabilities based on Ping Identity. Delivering modern access management options for legacy applications and systems. Being a key voice as part of the agile team, using your product owner skills to drive product development. Helping to define, communicate and implement our More ❯