1 to 25 of 132 Permanent Legacy Systems Jobs in the UK excluding London

a dynamic and forward-thinking Head of Engineering to lead our Roadside IT function through a major transformation programme. This is a rare opportunity to modernise legacy systems, simplify a complex technology estate, and inspire a high-performing engineering team to deliver real impact. We're proud to foster an inclusive culture where everyone can thrive. We … end-to-end technical deliveryacross Roadside value streams, ensuring alignment with strategic goals and high-quality outcomes. Drive engineering transformationby implementing a Scaled Agile Framework, modernising legacy systems, and simplifying a complex technology estate. Oversee multi-project deliveryacross value streams, ensuring excellence throughout the software delivery lifecycle and effective stakeholder engagement. Foster a high-performing engineering culture … performance, security, maintainability, and continuous improvement across tools, frameworks, and methodologies. What do I need? Proven experience leading engineering transformation within a Scaled Agile Framework, modernising legacy systems, and simplifying complex technology estates. Strong track record of strategic technical delivery across multiple projects and value streams, with deep expertise in the full software delivery lifecycle. Inspiring and More ❯

a dynamic and forward-thinking Head of Engineering to lead our Roadside IT function through a major transformation programme. This is a rare opportunity to modernise legacy systems, simplify a complex technology estate, and inspire a high-performing engineering team to deliver real impact. We're proud to foster an inclusive culture where everyone can thrive. We … end-to-end technical deliveryacross Roadside value streams, ensuring alignment with strategic goals and high-quality outcomes. Drive engineering transformationby implementing a Scaled Agile Framework, modernising legacy systems, and simplifying a complex technology estate. Oversee multi-project deliveryacross value streams, ensuring excellence throughout the software delivery lifecycle and effective stakeholder engagement. Foster a high-performing engineering culture … performance, security, maintainability, and continuous improvement across tools, frameworks, and methodologies. What do I need? Proven experience leading engineering transformation within a Scaled Agile Framework, modernising legacy systems, and simplifying complex technology estates. Strong track record of strategic technical delivery across multiple projects and value streams, with deep expertise in the full software delivery lifecycle. Inspiring and More ❯

in supporting underserved segments of the mortgage market. Two years ago, they embarked on an ambitious journey to modernise their operations, initiating a massive migration from legacy systems to a cutting-edge cloud environment (Azure). You'll be joining a forward-thinking organisation committed to leveraging technology to enhance its services and operational efficiency. THE ROLE … will lead a large and dynamic team of approximately 30 Data Engineers across multiple locations. Your primary responsibilities will include: Leading Cloud Migration: Overseeing the strategic migration of legacy databases (primarily SQL Server) to the Azure cloud platform. Team Leadership: Managing multiple Data Engineering teams, ensuring continued delivery of legacy projects while simultaneously driving the adoption … leaders across the data office, including the CTO and CIO, to ensure alignment. Third-Party Management: Effectively managing relationships with key third-party partners supporting both legacy systems and modernisation efforts. YOUR SKILLS AND EXPERIENCE: The ideal Head of Data Engineering will have: Proven Leadership: Extensive experience leading large Data Engineering teams, including managing multiple teams and More ❯

currently undergoing a large-scale digital transformation. They are looking for a Full Stack Developer with strong Microsoft and Azure experience to help modernise and integrate legacy systems with cloud-native, scalable applications. This is a hands-on role with involvement across the full software development lifecycle. You'll work in a hybrid environment with a tech … skills with a focus on scalability and security Experience working in agile teams and collaborating with product/design stakeholders Nice to Have Experience with modernising legacy systems Microsoft Azure Developer Certification Familiarity with Durable Functions , Logic Apps, or messaging systems like Event Grid Perks & Benefits 25 days holiday + birthday off Hybrid working Professional development More ❯

ongoing evolution of key platforms in collaboration with cross-functional teams. For this, they are looking for a technically confident developer who's comfortable working across a range of systems, technologies, and business needs. Key Responsibilities: Participate in the design, enhancement, and migration of legacy systems built in C#, VB, and Angular, using MySQL, PostgreSQL, and … maintainability, and ongoing evolution. Contribute to the implementation of modern architectures: microservices, containerised services, and serverless cloud-native components in AWS. Diagnose and resolve complex support issues in legacy applications. Contribute to Agile processes using KANBAN, ensuring transparency and delivery alignment. Document architecture decisions, deployment processes, and codebase changes clearly and thoroughly. Skills & Experience: Expertise in backend development … Javascript, HTML, CSS Strong database skills with SQL Server, MySQL, and PostgreSQL Familiarity working within a cloud environment, particularly AWS or Azure Experience maintaining and modernising legacy systems Experience working in a client-facing or business-facing technical role This is a full-time, permanent role, offering a starting salary up to £65,000 (Depending on experience More ❯

Our client an industry leading private sector business located in East Sussex is looking for a full stack .Net developer. Key Roles Participate in migration of legacy systems built in C#, VB.NET, Angular/TypeScript, using MySQL, PostgreSQL, and SQL Server technologies. Maintaining applications, ensuring reliability, maintainability, and evolution. Act as a liaison between the development team … Angular, TypeScript, JavaScript, HTML, CSS. SQL Server, MySQL, and PostgreSQL. AWS or Azure. Experience in a client-facing or business-facing technical role. Maintaining and modernising legacy systems, including VB.NET. Communication skills to engage confidently with non-technical stakeholders. Knowledge of Docker, CI/CD pipelines, GitHub, and Azure DevOps Reasonable Adjustments: Respect and equality are core More ❯

65k Our client an industry leading private sector business located in Wiltshire is looking for a full stack .Net developer. Key Roles Participate in migration of legacy systems built in C#, VB.NET, Angular/TypeScript, using MySQL, PostgreSQL, and SQL Server technologies. Maintaining applications, ensuring reliability, maintainability, and evolution. Act as a liaison between the development team … Angular, TypeScript, JavaScript, HTML, CSS. SQL Server, MySQL, and PostgreSQL. AWS or Azure. Experience in a client-facing or business-facing technical role. Maintaining and modernising legacy systems, including VB.NET. Communication skills to engage confidently with non-technical stakeholders. Knowledge of Docker, CI/CD pipelines, GitHub, and Azure DevOps Reasonable Adjustments: Respect and equality are core More ❯

business that is in the middle of an exciting technology transformation. They are seeking a Senior .NET Developer to take a leading role in modernising their legacy systems and driving AI adoption across the company. This is a fantastic opportunity for someone passionate about technology evolution, AI tooling, and delivering clean, modern code. You’ll help replace … to a React front end (already 50% there!) Mentoring and supporting other developers while ensuring best practices Collaborating with IT and product teams to redesign and modernise core business systems Participating in architecture discussions, code reviews, and deployment strategy Writing maintainable, well-documented code and implementing scalable solutions What We’re Looking For: 5+ years of .NET development experience … with proven modernisation/migration projects Experience moving from legacy systems (VB.NET) to modern stacks Strong knowledge of C#, .NET Core, SQL Server, REST APIs, and cloud environments Hands-on experience using AI developer tools like GitHub Copilot or ChatGPT Passion for clean code, architecture, and technical leadership Strong communication skills and a collaborative mindset Why Join More ❯

join during phase 1 of a multi-year strategy to unify and modernise their data, cloud, and tech set-up, including the move from on-prem legacy systems to the cloud (which will most likely be Azure). Reporting into their new CIO/CTO, you'll play a pivotal role in shaping and executing their enterprise … Trent, in line with their highly collaborative and close-knit culture. What You'll Be Doing: Assessing the current data estate across on-prem, cloud, and legacy systems Designing and implementing a scalable, future-proof data architecture Leading the migration from legacy tools (e.g., SSIS, SSRS) to modern platforms like Azure Data Factory and Power More ❯

join during phase 1 of a multi-year strategy to unify and modernise their data, cloud, and tech set-up, including the move from on-prem legacy systems to the cloud (which will most likely be Azure). Reporting into their new CIO/CTO, you'll play a pivotal role in shaping and executing their enterprise … don't live close enough to commute on a daily basis. What You'll Be Doing: Assessing the current data estate across on-prem, cloud, and legacy systems Designing and implementing a scalable, future-proof data architecture Leading the migration from legacy tools (e.g., SSIS, SSRS) to modern platforms like Azure Data Factory and Power More ❯

benefits An established, financial services group is on the lookout for a Head of Data Engineering to lead their data platform transformation - a critical migration from legacy systems (SQL Server) to modern Azure cloud technologies. You'll oversee a 40-person team of engineers (across the UK and offshore), guide delivery of critical regulatory and treasury projects … banking/financial services sector Strategic mindset with a delivery-focused leadership style Tech Environment: Azure Data Stack (Synapse, Databricks, Azure SQL, Power BI) SQL, Python Legacy systems primarily in SQL Server Interview Process: Initial 30-minute informal converdation 60-minute technical/competency interview with Engineering Managers Final 90 minute session with senior leadership (CDO, CTO More ❯

benefits An established, financial services group is on the lookout for a Head of Data Engineering to lead their data platform transformation - a critical migration from legacy systems (SQL Server) to modern Azure cloud technologies. You'll oversee a 40-person team of engineers (across the UK and offshore), guide delivery of critical regulatory and treasury projects … banking/financial services sector Strategic mindset with a delivery-focused leadership style Tech Environment: Azure Data Stack (Synapse, Databricks, Azure SQL, Power BI) SQL, Python Legacy systems primarily in SQL Server Interview Process: Initial 30-minute informal converdation 60-minute technical/competency interview with Engineering Managers Final 90 minute session with senior leadership (CDO, CTO More ❯

for continuous improvement and innovative solutions Work on both front-end and back-end development with a focus on C#, WPF, ASP.NET, and SQL Server Support legacy systems built with VB.NET and WinForms The Junior C# Developer will have the following skills: A solid understanding of C#and .Net Framework Knowledge or experience working with WPFand ASP.NET for … modern application development Experience or familiarity with SQL Server for database management Willingness to work with VB.NETand WinFormsin legacy systems Familiarity with HTML, CSS, and JavaScriptfor front-end development is a plus Self-sufficient, with the initiative to identify and solve problems independently Enthusiastic about developing high-quality and reliable software Ideal Candidate: You have a passion More ❯

for application-related queries, triaging and resolving issues while working closely with departmental heads to improve user satisfaction and productivity. You will lead the migration from legacy systems such as ShareFile to modern platforms like SharePoint, guiding users through significant change and embedding new ways of working. You will also support business transformation projects, manage supplier relationships … Applications Manager, you will: Manage and support the Microsoft technology stack, including SharePoint, Copilot, and other SaaS applications such as Adobe and SendGrid Lead migration from legacy systems like ShareFile to modern platforms such as SharePoint Act as the primary internal contact for application-related queries, resolving issues efficiently Engage with heads of department to understand needs … should have experience with the following: Microsoft 365 suite, particularly SharePoint and Teams SaaS application management, including tools such as Adobe Creative Cloud and SendGrid Service desk and ticketing systems, preferably Freshdesk or similar Understanding of software development life cycles (SDLC) and supplier management Awareness of IT security principles and best practices Ability to promote and support adoption of More ❯

Control Systems Engineer - WinCC | Warrington | £60,000 | UK Passport Required KO2's client, a specialist in advanced control systems and is seeking an experienced Control Systems Engineer with a deep understanding of WinCC, Siemens PLCs, and redundant server architecture. This is a full-time, permanent role based onsite in Warrington. Due to the nature of the work … candidates must hold a UK passport. The Role: The successful candidate will be involved in both the design and modification of complex control systems used in managing control systems that are used to control objects of high value. Key tasks include: Developing and modifying graphical interfaces for new and legacy systems using WinCC Pro Programming … SCADA systems to interface with databases for read/write operations Working with redundant WinCC servers and multiple operator stations across a high-density tag environment Integration and control of systems using Siemens S7, TIA Portal, and STL programming Interfacing with Plant Bus and Graphical Bus environments Onsite testing, with final FAT carried out by the client before More ❯

/3rd Line Application Support Analyst to support a suite of critical legacy business applications. In this role, you'll play a key part in keeping our systems stable, secure, and reliable while we modernise our technology estate. This is an excellent opportunity for someone who thrives in complex environments, has a strong grasp of SQL, and … hands-on experience with SQL - writing queries, analysing data, and troubleshooting database issues. Experience supporting legacy applications and understanding their constraints and risks. Familiarity with Windows-based systems, application servers, and basic networking concepts. Experience with ticketing systems (e.g. Jira, ServiceNow) and ITIL practices. Ability to work under pressure, manage priorities, and collaborate across teams. Bonus … working with on-prem databases, or supporting business-critical finance or insurance systems. Why Join Us? Work in a technically rich environment where your expertise with legacy systems truly matters. Be part of an organisation on a modernisation journey - your knowledge will be key in ensuring a stable transition. Opportunities for professional development, including future work on More ❯

not a "keep the seat warm" kind of role. You'll be at the heart of a major transformation, helping the business bridge the gap between legacy systems and a cutting-edge Azure-based data platform. Senior Data Engineer: What You'll Be Doing Maintain and enhance the existing SQL-based systems (SSIS, SSRS, SSAS). … Collaborate with the Lead Engineer to deliver scalable, cloud-first solutions using Azure technologies. Ensure seamless integration between legacy and modern platforms. Work closely with finance teams to modernise their data processes Bring leadership and gravitas to a business-facing role. Senior Data Engineer: Must-Have Experience: Strong SQL skills and experience with SSIS, SSRS, SSAS Data warehousing More ❯

native applications using C# , .NET Core , and Azure Functions Build and maintain responsive front-end interfaces using React , TypeScript , and modern UI libraries Integrate with internal and third-party systems via REST APIs Contribute to the design and implementation of AI-driven features to enhance automation and user experience Lead on DevOps practices , including CI/CD pipelines, automated … It for You? A flexible hybrid working model with just one day a week in the office The chance to work on greenfield projects and modernise legacy systems A collaborative, supportive team culture with opportunities for career progression Competitive salary, comprehensive benefits, and a strong focus on work-life balance Ready to take the lead on exciting More ❯

providing technical leadership, mentoring , and ensuring best practices in delivery, rather than being deep in code. You’ll work closely with senior stakeholders to support the re-alignment of systems, guide integration strategies, and help shape the long-term technical vision as the business consolidates both modern and legacy platforms. The team is largely based across Cardiff … a Technical Lead or Team Lead capacity A strong understanding of C#/.NET platforms, with the ability to guide others (without coding daily) Experience navigating legacy systems and shaping migration or re-architecture strategies Confidence leading agile delivery and working with multiple stakeholders A collaborative and supportive leadership style The Tech Environment: C#/.NET … Azure React SQL Legacy and modern integration work What’s in it for you: £60,000 (DOE) 25 days holiday 5% matched pension Training and progression support Perkbox benefits scheme High-impact work in a business where billions of pounds in loans flow through the platform daily If you're a people-first leader who thrives on enabling More ❯

provide technical guidance and oversight of customisations, including plugins, workflows, Power Automate flows, and JavaScript, ensuring efficient, reusable, and well-documented code.* Integrate D365 CE with other applications and systems using tools like Azure Logic Apps, Power Automate, and custom APIs.* Oversee the Dynamics 365 environment to enable the successful delivery of their Digital Transformation.* Manage and control D365 … and maintenance for D365 CE applications, troubleshoot issues, and implement fixes and enhancements.* Assist in data migration tasks, ensuring accurate and secure transfer of data from legacy systems to D365 CE* Collaborate with cross-functional teams, including business analysts, project managers, and other developers, to deliver high-quality solutions.* Stay updated with the latest D365 CE features More ❯

currently undergoing a large-scale digital transformation. They are looking for a Full Stack Developer with strong Microsoft and Azure experience to help modernise and integrate legacy systems with cloud-native, scalable applications. What You'll Do Develop and maintain full-stack solutions using .NET Core , C# , and React/Angular/Blazor Build and optimise REST More ❯

currently undergoing a large-scale digital transformation. They are looking for a Full Stack Developer with strong Microsoft and Azure experience to help modernise and integrate legacy systems with cloud-native, scalable applications. What You'll Do Develop and maintain full-stack solutions using .NET Core , C# , and React/Angular/Blazor Build and optimise REST More ❯

become more efficient by leveraging our data. In addition to the technologies above, we also use Python, APIs, and various ETL solutions interfacing with a small number of legacy systems. Responsibilities Take ownership for delivering all asks made of you on time and to specification. Build strong relationships with key stakeholders outside the department. Be responsible for data 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 ❯

and Access Management (IdAM), and overall access governance.This role will collaborate closely with cyber security, engineering, and business stakeholders, ensuring the delivery of secure, modern platforms to replace legacy systems. Candidates based in the UK, able to work in a hybrid model (two days per week in either our London or Nuneaton office), are strongly preferred. The Role … new store and enterprise features. Technical Execution Ensure agile delivery of high-quality, secure solutions using Scrum, SAFe, or other scaled agile frameworks. Guide transitions from legacy systems to secure modern platforms with minimal disruption. Monitor and support post-implementation phases, addressing access issues, incidents, or escalations. Initial Objectives (First 3 Months) Establish and lead a comprehensive More ❯