76 to 100 of 223 Legacy Systems Jobs in the UK

as part of their continued UK growth in 2025. They are looking to recruit a NAV/Business Central Developer on a permanent basis - supporting their investment in business systems modernisation in 2026. Job Purpose: We are seeking support for the migration of multiple on-premises and cloud installations of Microsoft Dynamics NAV and Business Central (BC) into a … meet business needs Build and support integrations between NAV, Business Central and other applications using APIs, web services (REST, OData) and data exchange frameworks Upgrade legacy NAV systems to Business Central, ensuring minimal disruption and improved functionality Troubleshoot functional and technical issues, identifying root causes and delivering effective solutions Optimise performance and ensure code quality through testing … expectations effectively Logical problem solver with great attention to detail Skills & Competencies: Experience providing 2nd and 3rd line support for Dynamics 365 Business Central and legacy NAV systems Strong hands-on development experience with Dynamics NAV and Business Central (AL and C/AL) Excellent understanding of BC functionality across finance, sales, purchasing, inventory and warehousing Deep More ❯

Project Manager Needed for Commercial Systems Replacement Project/2.5 Year Contract InsideIR35 £450 Per Day/Edinburgh Hybrid Please note - ****Must come from Public Sector background and worked on EPOS related projects Are you an experienced Project Manager with a passion for leading transformative initiatives? This company is seeking a talented individual to oversee the replacement of their … two largest commercial systems, which generate a significant portion of their earned income. The Role of the Project Manager As the Project Manager , you will be responsible for the overall management and successful delivery of this high-profile project. Key responsibilities include: Developing and managing the project plan, ensuring deliverables are completed on time and within budget Coordinating with … to ensure seamless implementation Establishing effective project governance and controls, including regular reporting and stakeholder engagement Identifying and mitigating risks, and driving the change management strategy Ensuring the new systems are aligned with the company's IT standards and strategic objectives The Ideal Candidate The successful Project Manager will possess the following skills and experience: Proven track record of More ❯

Provide support to interoperability Information management and sharing between legacy, current and future capabilities. Work with LC2, OpNET L3/4 teams and other legacy systems to ensure interoperability solutions have IM support and can be implemented across Navy FLC interests. Develop and administer the Navy FLC OpNET HUB, create and collapse site collections as … information management MOD security clearance or be willing to undergo Security Clearance to DV level Desirable Skills Some knowledge of industry standards - BRd7747 Involvement in an iHub Communications information systems (Royal Navy) Providing support with SharePoint Background knowledge of either naval or maritime would be advantageous Excellent communication skills Able to follow the laid-down process Computer literate and More ❯

Provide support to interoperability Information management and sharing between legacy, current and future capabilities. Work with LC2, OpNET L3/4 teams and other legacy systems to ensure interoperability solutions have IM support and can be implemented across Navy FLC interests. Develop and administer the Navy FLC OpNET HUB, create and collapse site collections as … information management MOD security clearance or be willing to undergo Security Clearance to DV level Desirable Skills Some knowledge of industry standards - BRd7747 Involvement in an iHub Communications information systems (Royal Navy) Providing support with SharePoint Background knowledge of either naval or maritime would be advantageous Excellent communication skills Able to follow the laid-down process Computer literate and More ❯

oversee the rollout of Syspro across its UK operations. This is a pivotal role in driving system transformation and operational efficiency as the business transitions from legacy systems (Sage and Microsoft AX) to Syspro. £600-£700pd. ERP/MRP Project Manager West Midlands - Travel to other sites required Contract position (Outside IR35) Full-Time, Monday to Friday … the Syspro ERP system Deliver in-depth training to staff across departments, ensuring effective adoption Coordinate and manage project phases, timelines, and stakeholder engagement Support the transition from existing systems (Sage and AX) to Syspro Collaborate with teams in operations, warehousing, and finance Travel regularly to key sites during the rollout Key Skills and Experience: Demonstrable experience with Syspro More ❯

Lead Integration Architect - Workday Contract/Outside IR35 A leading UK-based organisation is undergoing a strategic transformation of its enterprise systems, with Workday at the core of its HR and finance operations. We're seeking a Lead Integration Architect to design and oversee the integration landscape, ensuring seamless data flows across platforms using Workato. Key Responsibilities * Define and … Ensure alignment with enterprise architecture principles and IT governance * Collaborate with Workday implementation teams to ensure integration readiness * Design and implement data flows between Workday and legacy systems * Support data migration, validation, and reconciliation * Own Workato platform governance, performance, and roadmap * Lead development of APIs, connectors, and integration workflows * Manage vendor relationships and platform capabilities * Translate business More ❯

IT systems. This role will offer you a wide variety of technical and business challenges as new products, regulations, and market practices emerge. You’ll work across both legacy and modern platforms, with a strong focus on training and development to get you up to speed quickly. From day one, you’ll contribute to real-world projects and … ownership of tasks in a small team setting Why Join Us? Join a stable, permanent position with strong growth potential Gain experience in both modern and legacy systems Be part of a high-impact, agile team where your contributions matter Receive hands-on technical and business training Work in the fast-paced and ever-evolving world of … financial trading systems Ready to Start Your Career with Us? This is a permanent, full-time position ideal for a graduate looking to launch their career in a collaborative and technically rich environment. Send your CV and a brief cover letter and tell us why you're the right fit for the team. Due to the volume of applications More ❯

to help drive the design and delivery of modern, scalable software solutions as part of a wider digital transformation. This role will support the reduction of legacy systems, guide a small internal team, and promote best practices across development. Responsibilities Design and build internal applications and services (architecture curiosity and input encouraged) Lead migration of legacy … code reviews, and foster technical growth Recommend tools, frameworks, and stay aligned with .NET roadmap Knowledge of modern development practices (CI/CD, Git, unit testing) Experience migrating legacy applications Comfortable mentoring and reviewing code Note: Be first to hear about new opportunities with job alerts direct to your inbox. More ❯

against agreed outcomes, budget, and timelines. Oversee project managers and PMO resources, providing leadership, mentoring, and line management where required. Drive technical strategy and optimisation, including licence rationalisation, legacy estate transformation, and fit-for-purpose design solutions. Lead the introduction and adoption of AI technologies and Copilot, including governance, policy, and business integration. Ensure cyber security, compliance, and … Intune, Entra ID, Azure, EUC, VMware, and SaaS solutions. Proven experience introducing and landing AI solutions within a business context. Strong architectural perspective, capable of challenging legacy systems and driving optimisation. Excellent stakeholder management and communication skills, with credibility and gravitas at senior levels. Track record of programme delivery in regulated or risk-averse environments, ideally with More ❯

at senior consultant or manager level. You will work closely with cross-functional teams and high-level stakeholders, supporting large-scale transformation programmes focused on modernising legacy systems and enhancing digital payment capabilities. Responsibilities Collaborate with business and technical stakeholders to elicit, document, and validate requirements across complex payments and banking platforms Translate business objectives and user … and timely deliverables Requirements Minimum of 4 years proven experience as a Technical Business Analyst within the UK banking and payments sector Strong understanding of payment platforms, schemes, and systems (e.g. Faster Payments, BACS, CHAPS, SEPA) Hands-on experience in payments transformation or modernisation initiatives Excellent communication skills, with the ability to effectively interface between business users and technical More ❯

play a key role in shaping the future of digital solutions in a professional services setting? This Enterprise Architect opportunity will see you influencing strategy, modernising Legacy systems, and designing solutions that have real impact, both internally and for clients. Role: Enterprise Architect Location: East Anglia (Ipswich, Norwich, Cambridge or Chelmsford) Hybrid pattern: 3 days per week … You'll also enjoy the freedom to shape architectural strategy and directly influence how technology enables transformation. What you'll be doing Designing innovative, scalable technology solutions that modernise systems, reduce technical debt and enable new services Setting and aligning architecture with business strategy and long-term vision Driving integration of cloud platforms (Microsoft Azure), data management, and modern More ❯

stay up-to-date with new technologies Excellent communication and problem-solving skills Beneficial experience: Leading small development teams to deliver functionality on time Migrating large legacy systems Azure Pipelines, MSBuild, ASP.NET MVC, WCF Services WinForms/WPF Web accessibility, responsive web applications, localisation for global markets Responsibilities for Software Developer: Develop features across the full stack … our website). Keywords – Software Developer/Full Stack Developer/C# Developer/.NET Developer/Application Developer/Web Developer/Backend Developer/Frontend Developer/Systems Developer/API Engineer/C#/.NET/SQL Server/Angular/HTML/CSS/TypeScript/Web API/Azure/ASP.NET MVC/WinForms More ❯

Key Responsibilities Deliver functional expertise across Oracle Fusion Finance modules (GL, AP, PO, AR, CM); EPM (FCC) desirable Provide best-practice input on data migration from legacy systems into Oracle Fusion Define and oversee user role mappings, access management, and security provisioning Support business adoption, including training materials, end-user guidance, and change enablement Guide quality assurance More ❯

discussions and contribute ideas to improve engineering practices and tooling Write clean, maintainable, and well-documented code that aligns with team standards Help maintain and improve legacy systems while contributing to the development of new services and features Support the team in delivering high-quality software through testing, documentation, and collaboration Collaborate with the Lead Software Engineer More ❯

Intrum UK, we're reshaping how financial services accounts are managed-from debt recovery and collections to mortgages and customer support. Our mission is to modernise legacy systems and build scalable, serverless solutions using cutting-edge cloud technologies. We're building customer-facing web applications powered by AWS and React, and we're looking for a talented More ❯

Intrum UK, we're reshaping how financial services accounts are managed-from debt recovery and collections to mortgages and customer support. Our mission is to modernise legacy systems and build scalable, serverless solutions using cutting-edge cloud technologies. We're building customer-facing web applications powered by AWS and React, and we're looking for a talented More ❯

Intrum UK, we're reshaping how financial services accounts are managed-from debt recovery and collections to mortgages and customer support. Our mission is to modernise legacy systems and build scalable, serverless solutions using cutting-edge cloud technologies. We're building customer-facing web applications powered by AWS and React, and we're looking for a talented More ❯

Intrum UK, we're reshaping how financial services accounts are managed-from debt recovery and collections to mortgages and customer support. Our mission is to modernise legacy systems and build scalable, serverless solutions using cutting-edge cloud technologies. We're building customer-facing web applications powered by AWS and React, and we're looking for a talented More ❯

Utilize Power BI to develop comprehensive reporting functionalities that provide insightful analytics to stakeholders. Simplify Architecture: Identify and eliminate barriers to data analysis by automating processes and streamlining legacy systems. Stakeholder Engagement: Actively contribute to process enhancements by gathering feedback and insights from stakeholders to refine solutions. Agile Methodology: Work collaboratively in an agile environment, adapting to evolving More ❯

or Brighton Join a leading international eCommerce organization committed to driving innovation through AI. We are looking for a Senior Frontend Developer to lead the modernization of our core systems, utilizing React and JavaScript to enhance performance and efficiency. Your expertise will be key in transforming our technology stack and implementing AI-powered solutions. About the Role: Play a … pivotal role in transforming our technology stack and driving the adoption of AI-powered tools to enhance development workflows. Modernize critical systems and implement intelligent solutions that support business growth and efficiency. Key Responsibilities: Lead the migration of legacy systems to a modern tech stack using React, JavaScript, and cloud platforms. Design and implement AI-driven More ❯

Are you a proactive IT professional with a passion for maintaining robust information systems? We're looking for an enthusiastic and collaborative IT & MIS Officer to support and enhance core technology across a growing Wales-based organisation. About the Role In this varied and hands-on role, you'll maintain and improve internal IT infrastructure and Management Information Systems. … Salary: 30,000 Key Responsibilities Maintain and support Microsoft Exchange Server, Windows Server, domain controllers, Active Directory, DNS, DHCP, and Group Policy Oversee and maintain SQL Server-based internal systems, including stored procedures, views, and user access Administer user accounts, security permissions, backups, and regular updates across infrastructure Generate and run business reports to meet operational and regulatory requirements … Policy SQL Server administration, including reports, stored procedures, and database maintenance Reporting tools such as SSRS or Crystal Reports Hybrid cloud/on-premise environments Troubleshooting legacy systems (e.g., ASP.NET, VB.NET) Excellent communication skills in English, both written and oral Strong attention to detail, time management, and organisational skills Analytical, proactive, and solutions-focused mindset Willingness to More ❯

Are you a proactive IT professional with a passion for maintaining robust information systems? We're looking for an enthusiastic and collaborative IT & MIS Officer to support and enhance core technology across a growing Wales-based organisation. About the Role In this varied and hands-on role, you'll maintain and improve internal IT infrastructure and Management Information Systems. … Salary: £30,000 Key Responsibilities Maintain and support Microsoft Exchange Server, Windows Server, domain controllers, Active Directory, DNS, DHCP, and Group Policy Oversee and maintain SQL Server-based internal systems, including stored procedures, views, and user access Administer user accounts, security permissions, backups, and regular updates across infrastructure Generate and run business reports to meet operational and regulatory requirements … Policy SQL Server administration, including reports, stored procedures, and database maintenance Reporting tools such as SSRS or Crystal Reports Hybrid cloud/on-premise environments Troubleshooting legacy systems (e.g., ASP.NET, VB.NET) Excellent communication skills in English, both written and oral Strong attention to detail, time management, and organisational skills Analytical, proactive, and solutions-focused mindset Willingness to More ❯

cloud-native architecture, and continuous delivery, the tech function is central to business success. The company is undergoing a strategic transformation, modernising its architecture and consolidating legacy systems into a more unified, service-oriented ecosystem. It offers a collaborative environment where technical leadership is valued, and architects play a key role in shaping long-term direction, evaluating … emerging technologies, and driving innovation across the stack. Key Responsibilities: Translate complex business needs into scalable tech solutions Design and document architecture across systems and platforms Evaluate emerging technologies and manage vendor relationships Ensure performance, security, and alignment with business goals Requirements: Proven experience as a Technical Architect in modern environments Strong grasp of cloud, APIs, microservices, CI/ More ❯

Collaborate with senior technical stakeholders to define AI strategy and roadmaps for digital transformation initiatives Ensure AI solutions integrate effectively with existing government technology infrastructure and legacy systems Design scalable, cloud-first AI architectures following government security and data protection standards Lead the selection and technical design of appropriate AI technologies, platforms, and tools Develop documentation and … of machine learning frameworks, cloud platforms (AWS, Azure, GCP), and MLOps(machine learning operations) practices. Deep knowledge about design and implementation of secure integrations between AI solutions and legacy enterprise software, whilst ensuring compliance with government-level security requirements, implementing single sign-on (SSO) authentication protocols, and maintaining appropriate access controls for OFFICIAL and OFFICIAL-SENSITIVE information handling. … government technology standards and security frameworks Working knowledge about appropriate Data Ethics Frameworks for AI initiatives, ensuring responsible and transparent AI deployment Understanding of the modern and current AI systems and their lifecycle. Experience working in regulated environments with strict security and compliance requirements Experience of working at pace, on cutting-edge technology and not afraid to take on More ❯

Reliability Engineer to join on a fast-paced contract, driving down technical debt and delivering urgent, high-impact fixes across a mixed environment of Linux, Windows, and Apache-based systems . This isn't a greenfield build. It's a high-urgency, hands-on role where you'll patch vulnerabilities, remediate legacy issues, and stabilise infrastructure and … You'll Be Doing Patching & hardening: Triage vulnerabilities across servers, apps, and services, applying fixes safely and quickly. Technical debt remediation: Refactor brittle components, clean up legacy systems, and stabilise critical services. Full lifecycle fixes: Take issues from diagnosis through to implementation, testing, and release. Operate at pace: Balance urgency with safety to deliver resilient solutions in More ❯