1 to 25 of 470 Legacy Systems Jobs in the UK

and they are in the process of continuing to evolve and modernise, they are undertaking a major transformation of their digital platforms, including the migration of legacy systems to Microsoft Dynamics and cloud-native solutions. We are looking for a talented Software Developer to contribute to the ongoing development and maintenance of in-house systems as … functional delivery teams. This is a hands-on role with both technical and stakeholder-facing responsibilities. Key Responsibilities Participate in the design, enhancement, and migration of legacy systems built in C#, VB.NET, and Angular/TypeScript, using MySQL, PostgreSQL, and SQL Server technologies. Maintaining core business-critical applications, ensuring reliability, maintainability, and ongoing evolution. Act as a … MySQL, and PostgreSQL. Familiarity with Amazon Web Services (AWS) or Azure. Experience working in a client-facing or business-facing technical role. Experience maintaining and modernising legacy systems, including VB.NET. Excellent communication skills and the ability to engage confidently with non-technical stakeholders. Experience integrating with or migrating to MS-Dynamics. Understanding of RESTful APIs, WSDL, and More ❯

Finance Systems (SAP) Lead Work Location: Chiswick, London, UK (3 days) It Means More (Personalised Bullet Points) We are seeking a highly skilled and hands-on SAP Finance Process Lead to support and enhance customer's Finance operations within SAP ECC 6. This role will serve as the primary SAP expert for the Finance function, responsible for both business … users, providing expertise and troubleshooting support. The ideal candidate will have deep functional knowledge of SAP Finance modules, strong configuration skills, and the ability to bridge legacy systems with future-state architecture3rd personalised bullet points The Role Candidate would be able to work with Business teams. This role ensures smooth operation and efficient use of SAP applications … in SAP configuration and support for core Finance processes. Experience in year-end and month-end close processes, including reporting and reconciliation. Demonstrated ability to analyse legacy systems, identify improvement opportunities, and plan for future-state architecture. Experience working on SAP change and enhancement projects, coordinating or supporting end-to-end testing, cutover, and hypercare activities for More ❯

will be responsible for designing, building, and maintaining robust data infrastructure to support the organisations expanding data and analytics needs. This includes leading the migration of legacy systems to modern cloud-based platforms , managing APIs for seamless data exchange , and ensuring data quality, security, and reliability across all systems. Youll play a key role in developing and … optimising ETL pipelines , automating data workflows , and supporting integration between core business systems such as Microsoft Dynamics . Strong hands-on experience with Azure, SQL, and Python-based data engineering is essential. This is an excellent opportunity for someone who thrives in a scalable, acquisition-driven environment , enjoys solving complex data challenges, and wants to help shape the data … strategy of a dynamic, technology-focused business. What Youll Be Doing Lead and deliver data migration projects from legacy systems to modern, cloud-based environments. Design, develop, and optimise ETL pipelines and automated data workflows. Collaborate across IT and business functions to define data requirements and deliver efficient solutions. Manage and maintain data integrations and APIs for More ❯

successful candidate will be responsible for designing, planning, and delivering end-to-end data migration solutions — ensuring the integrity, accuracy, and completeness of data transitioning from legacy systems to Oracle Cloud ERP. Key Responsibilities Lead the data migration strategy, planning, and execution for the Oracle Cloud ERP implementation (Finance, Procurement, Projects, HR, etc.). Design and manage … data extraction, transformation, and loading (ETL) processes from multiple legacy systems into Oracle Cloud ERP. Develop data mapping and transformation logic , ensuring alignment with Oracle Cloud data models and business requirements. Collaborate with business process owners and functional leads to define data migration scope, rules, validation criteria, and reconciliation methods . Manage data cleansing, validation, and reconciliation … complex data migration strategies across large datasets. Experience in data profiling, cleansing, and reconciliation techniques. Hands-on experience with Excel-based data loads, REST APIs, and integration with external systems (desirable). Strong analytical, problem-solving, and communication skills. Experience working in agile or hybrid project environments and collaborating with cross-functional teams. Qualifications Bachelor’s degree in Information More ❯

supplements directly to our customers all over the world. We are proud to have a team of enthusiastic customers and colleagues who are all dedicated to creating a legacy of wellbeing. At Lifeplus we celebrate and embrace diversity and we believe that our success comes from creating a caring and fun community. Job Purpose: The primary purpose of … as a hands on Test Analyst with Project/Programme Go Live exposure. Perform ETL testing to validate data extraction, transformation logic, and loading accuracy between legacy systems and ERP platforms (Hands-on experience with tools like Informatica, Talend, SSIS, DataStage, or Azure Data Factory) Familiarity with validating data migration from legacy systems to More ❯

Principal AI/ML Consultant to lead strategic technical transformation within a financial services environment. This is a hands-on, client-facing role focused on modernising legacy systems, driving AI adoption, and delivering measurable business value. Key Responsibilities Lead the systematic modernisation of legacy services, prioritising based on business impact. Eliminate technical debt by extracting … APIs, decommissioning obsolete services, and consolidating functionality. Collaborate with engineering teams to identify and deliver high-impact modernisation opportunities. Support platform services strategy by transforming legacy services into reusable, shared components. Drive adoption of AI tooling (e.g., Claude Code, GitHub Copilot) to accelerate development and modernisation. Create playbooks and replicable patterns for AI-enabled development and modernisation. Use … AI adoption. Ensure modernised services are handed off with clear ownership and integrated into new workflows. Skills & Experience Proven experience leading technical teams and modernising complex legacy systems at scale. Strong architectural skills and ability to design logical abstractions for legacy code. Experience managing mixed teams of employees and contractors. Hands-on experience implementing AI More ❯

Principal AI/ML Consultant to lead strategic technical transformation within a financial services environment. This is a hands-on, client-facing role focused on modernising legacy systems, driving AI adoption, and delivering measurable business value. Key Responsibilities Lead the systematic modernisation of legacy services, prioritising based on business impact. Eliminate technical debt by extracting … APIs, decommissioning obsolete services, and consolidating functionality. Collaborate with engineering teams to identify and deliver high-impact modernisation opportunities. Support platform services strategy by transforming legacy services into reusable, shared components. Drive adoption of AI tooling (e.g., Claude Code, GitHub Copilot) to accelerate development and modernisation. Create playbooks and replicable patterns for AI-enabled development and modernisation. Use … AI adoption. Ensure modernised services are handed off with clear ownership and integrated into new workflows. Skills & Experience Proven experience leading technical teams and modernising complex legacy systems at scale. Strong architectural skills and ability to design logical abstractions for legacy code. Experience managing mixed teams of employees and contractors. Hands-on experience implementing AI More ❯

Be) that supports business and IT strategy. Create and maintain roadmaps for legacy transformation and decommissioning, including detailed plans and timelines for phasing out legacy systems while ensuring continuity of operations and minimising risks. Ensure solutions comply with legislation and cybersecurity standards. Establish and maintain architectural principles and standards, formalising and regularly updating guidelines and … by defining, tracking, and reporting on KPIs that measure the effectiveness, agility, and value of the enterprise architecture. Improve user experience with modern technology and streamlined legacy systems, increasing efficiency. Promote system interoperability across council boundaries to reduce administrative burdens and boost public engagement. Foster a one-team culture across technology and council. Engage in budgeting and More ❯

of AWS technologies such as Glue, Athena, LakeFormation, and DataBrew — unlocking the full potential of the organisation’s data assets. Working confidently across both AWS and legacy systems, you’ll source, validate, and connect data into a unified view, ensuring consistency and reliability. Collaboration will be at the heart of what you do. You’ll work closely … modern architectures, with proven experience using AWS tools such as Glue, Athena, LakeFormation, or DataBrew. You’ll also be adept at working across both cloud and legacy systems, with excellent communication skills that allow you to bridge technical and non-technical audiences alike. A proactive, curious mindset and a passion for using data to influence and improve More ❯

established business in Brentford is seeking an experienced BI Developer to join their BI & Data Team as they embark on a major transformation journey, moving from legacy systems towards a modern Microsoft ecosystem built on Azure and Fabric. The team operates mostly remotely, with office collaboration up to once per week alongside the wider BI & Data team … data models for performance and reusability Supporting governance, security, and compliance best practices in a modern data platform Tooling for migration and reconciliation of data from legacy systems or acquisitions Providing technical support and hands-on data engineering across the full stack We are looking for: Strong experience as a BI Developer, Data Engineer, or similar Hands … Solid background in database technologies (SQL), reporting tools (Power BI) Excellent communication skills to work across technical and non-technical teams Experience with migration projects (e.g., moving from legacy BI to Fabric) is desirable Knowledge of governance and security within Microsoft Purview is a plus You will be rewarded with: Salary up to £60,000 depending on experience More ❯

established business in Brentford is seeking an experienced BI Developer to join their BI & Data Team as they embark on a major transformation journey, moving from legacy systems towards a modern Microsoft ecosystem built on Azure and Fabric. The team operates mostly remotely, with office collaboration up to once per week alongside the wider BI & Data team … data models for performance and reusability Supporting governance, security, and compliance best practices in a modern data platform Tooling for migration and reconciliation of data from legacy systems or acquisitions Providing technical support and hands-on data engineering across the full stack We are looking for: Strong experience as a BI Developer, Data Engineer, or similar Hands … Solid background in database technologies (SQL), reporting tools (Power BI) Excellent communication skills to work across technical and non-technical teams Experience with migration projects (e.g., moving from legacy BI to Fabric) is desirable Knowledge of governance and security within Microsoft Purview is a plus You will be rewarded with: Salary up to £60,000 depending on experience More ❯

drive the evolution of our Player Account Management systems. Full-time Closes 03/12/2025 We are seeking innovative individual with proven experience in architecting complex software systems and a strong track record in stakeholder engagement, particularly within in fast-paced environments. Your expertise in Microsoft technologies, GoLang, Kubernetes, and cloud platforms will be invaluable as you … emerging technologies, and deliver scalable and reliable solutions. You will collaborate with Business stakeholders to translate requirements into a robust architectural vision, guiding the transformation of legacy systems into modern, cloud-based solutions This role is eligible for inclusion in the Company's hybrid working from home policy. Preferred Skills and Experience Demonstrable experience in a dedicated … Architect role, with a proven ability to design and deliver complex software systems in fast-paced environments. Demonstrated ability to produce vision documents and technical roadmaps from Business requirements. Experience with Microsoft technologies, such as VB.Net, WPF, C# and MSSQL Server, and successful migration to modern, cloud-based solutions. Detailed understanding of the architectural application of modern technology stacks More ❯

established business in Brentford is seeking an experienced BI Developer to join their BI & Data Team as they embark on a major transformation journey, moving from legacy systems towards a modern Microsoft ecosystem built on Azure and Fabric. The team operates mostly remotely, with office collaboration up to once per week alongside the wider BI & Data team … data models for performance and reusability Supporting governance, security, and compliance best practices in a modern data platform Tooling for migration and reconciliation of data from legacy systems or acquisitions Providing technical support and hands-on data engineering across the full stack We are looking for: Strong experience as a BI Developer, Data Engineer, or similar Hands … background in database technologies (SQL), and reporting tools (Power BI) Excellent communication skills to work across technical and non-technical teams Experience with migration projects (e.g., moving from legacy BI to Fabric) is desirable Knowledge of governance and security within Microsoft Purview is a plus You will be rewarded with: Salary up to £60,000 depending on experience More ❯

established business in Brentford is seeking an experienced BI Developer to join their BI & Data Team as they embark on a major transformation journey, moving from legacy systems towards a modern Microsoft ecosystem built on Azure and Fabric. The team operates mostly remotely, with office collaboration up to once per week alongside the wider BI & Data team … data models for performance and reusability Supporting governance, security, and compliance best practices in a modern data platform Tooling for migration and reconciliation of data from legacy systems or acquisitions Providing technical support and hands-on data engineering across the full stack We are looking for: Strong experience as a BI Developer, Data Engineer, or similar Hands … background in database technologies (SQL), and reporting tools (Power BI) Excellent communication skills to work across technical and non-technical teams Experience with migration projects (e.g., moving from legacy BI to Fabric) is desirable Knowledge of governance and security within Microsoft Purview is a plus You will be rewarded with: Salary up to £60,000 depending on experience More ❯

Our global client is looking for a D365 F&O specialist with extensive expeirence migrating from legacy to D365 F&O. This is a hybrid role outside … IR35 initially for 12 months with a good chance to extend. Data Migration Lead tasked with overseeing the planning, execution, and management of data transfers from legacy systems to Microsoft Dynamics 365. Responsibilities include ensuring data accuracy, consistency, and compliance with business needs throughout the entire migration lifecycle." Strong understanding of data migration principles and best practices. … techniques. Experience in delivering D365F&O and integration using Azure services. Successfully migrated Dynamics 365 F&O multiple times, with proven experience leading data migration from legacy systems to D365. More ❯

Our global client is looking for a D365 F&O specialist with extensive expeirence migrating from legacy to D365 F&O. This is a hybrid role outside … IR35 initially for 12 months with a good chance to extend. Data Migration Lead tasked with overseeing the planning, execution, and management of data transfers from legacy systems to Microsoft Dynamics 365. Responsibilities include ensuring data accuracy, consistency, and compliance with business needs throughout the entire migration lifecycle." Strong understanding of data migration principles and best practices. … techniques. Experience in delivering D365F&O and integration using Azure services. Successfully migrated Dynamics 365 F&O multiple times, with proven experience leading data migration from legacy systems to D365. More ❯

and business systems. You will play a central part in modernising our integrations, particularly through the development of API-driven solutions, while also providing support for legacy systems where needed. Collaborating with engineers across our two UK offices in Nottingham and Congleton and working directly with customers, you will tackle technical challenges that bridge software engineering with … Develop robust integrations using C, C# .NET, APIs, SQL, and MVC frameworks within Visual Studio • Maintain and enhance Windows-based desktop applications (WinForms, WPF, and VB.NET legacy systems) • Collaborate with customers and internal teams to scope, design, and deliver integration projects • Build and maintain scalable data solutions leveraging SQL, XML, and JSON • Debug, optimise, and performance tune … applications • Produce technical documentation • Support on-site commissioning, including occasional travel across the UK and overseas • Continuously learn and apply best practices in systems integration and automation software Required Skills • C and C# .NET proficiency • Strong SQL skills (queries, stored procedures, optimisation) • Knowledge of XML and JSON data structures • Desktop development in Windows environments (e.g., WinForms, WPF, VB.NET) • Hands More ❯

a Solutions Architect - Infrastructure & Cloud in the Technology Directorate, you would have: Led the design of a secure, scalable cloud platform to support the migration of legacy systems, enabling faster, more reliable services for users. Developed a cloud adoption roadmap that reduced operational costs while improving resilience and sustainability. Acted as a technical lead on a cross … by: Designing and assuring cloud and infrastructure solutions that align with CQC's digital strategy and enterprise architecture. Developing and maintaining infrastructure roadmaps, including transitions from legacy systems to modern platforms. Acting as the design authority for hosting, networking, identity, and platform services. Embedding security, resilience, and sustainability into all infrastructure designs. Collaborating with internal teams and More ❯

C, C# .NET, APIs, SQL and MVC frameworks within Visual Studio Design, develop and deploy integration solutions that connect the company’s automation platforms with customer ERP and business systems Work on internal projects to enhance and modernise the firm’s seamless integrations through the development of API driven solutions Provide regular support along with the rest of development … team in maintaining legacy systems when required Maintain and enhance Windows-based desktop applications (WinForms, WPF and VB.NET legacy systems) Collaborate with customers and internal teams to scope, design and deliver integration projects Build and maintain scalable data solutions leveraging SQL, XML and JSON Debug, optimise and deploy performance tune applications Produce accurate technical … JSON and XML data structures Desktop development experience in a Windows environment Experience using Git and JIRA for version control and tracking support tickets Experience configuring and implementing ERP systems highly advantageous Previous hands-on experience with web development languages and frameworks such as ASP.NET MVC, HTML and JavaScript About Express Recruitment Express Recruitment has been offering exceptional recruitment More ❯

truly innovative technology. The role: You will be a versatile and proactive Senior Full Stack Developer to join their team and help bridge the gap between legacy systems and modern application development. This is a hands-on role working on a ColdFusion-based application backed by an Oracle database, with a strong emphasis on both front-end … and back-end capabilities. Key Responsibilities Develop and maintain full stack solutions using Oracle DB Support legacy system migration and ERP integration efforts Build and consume APIs to enhance application functionality Collaborate with offshore development teams to ensure smooth delivery and coordination Contribute to front-end development using technologies like ColdFusion Participate in code reviews, testing, and deployment … SQL Exposure to ColdFusion or willingness to learn quickly Experience of front-end technologies and frameworks Experience with API development and integration (RESTful services) Familiarity with legacy systems and migration projects Ability to coordinate and communicate effectively with offshore teams The following benefits: 10% employer pension contribution 25 Days annual leave, plus public holidays Life assurance 4x More ❯

truly innovative technology. The role: You will be a versatile and proactive Senior Full Stack Developer to join their team and help bridge the gap between legacy systems and modern application development. This is a hands-on role working on a ColdFusion-based application backed by an Oracle database, with a strong emphasis on both front-end … and back-end capabilities. Key Responsibilities Develop and maintain full stack solutions using Oracle DB Support legacy system migration and ERP integration efforts Build and consume APIs to enhance application functionality Collaborate with offshore development teams to ensure smooth delivery and coordination Contribute to front-end development using technologies like ColdFusion Participate in code reviews, testing, and deployment … SQL Exposure to ColdFusion or willingness to learn quickly Experience of front-end technologies and frameworks Experience with API development and integration (RESTful services) Familiarity with legacy systems and migration projects Ability to coordinate and communicate effectively with offshore teams The following benefits: 10% employer pension contribution 25 Days annual leave, plus public holidays Life assurance 4x 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 ❯

problems. About the Role:You will spearhead the development and enhancement of enterprise-level reporting capabilities, leading the migration and integration of reporting frameworks from various legacy systems into Oracle Fusion. This role demands a commitment to ensuring data accuracy, performance, and business alignment, delivering reliable, insightful, and scalable reporting solutions in close collaboration with stakeholders. Key … Responsibilities: Lead the development and enhancement of enterprise-level reporting capabilities within Oracle Fusion. Lead the migration and integration of reporting frameworks from legacy systems into Oracle Fusion. Ensure data accuracy, performance, and business alignment of all reporting solutions. Collaborate closely with stakeholders to deliver reliable, insightful, and scalable reporting solutions. Essential Skills & Experience: Deep expertise in More ❯

problems. About the Role: You will spearhead the development and enhancement of enterprise-level reporting capabilities, leading the migration and integration of reporting frameworks from various legacy systems into Oracle Fusion. This role demands a commitment to ensuring data accuracy, performance, and business alignment, delivering reliable, insightful, and scalable reporting solutions in close collaboration with stakeholders. Key … Responsibilities: Lead the development and enhancement of enterprise-level reporting capabilities within Oracle Fusion. Lead the migration and integration of reporting frameworks from legacy systems into Oracle Fusion. Ensure data accuracy, performance, and business alignment of all reporting solutions. Collaborate closely with stakeholders to deliver reliable, insightful, and scalable reporting solutions. Essential Skills & Experience: Deep expertise in More ❯