1 to 25 of 477 Legacy Systems Jobs in the UK

Role:HR Data Administrator/AnalystLocation:Coventry Contract: 6 Months (3 Days A Week)Day Rate: Up to £200/day (All in) Support Smarter HR Systems with One of Europe’s Leading Distributors We’re working with a major European distributor undergoing a transformation of their HR systems and processes. They’re now looking for a part … time HR Data Administrator/Analyst to support the HR Systems team with data management, reporting, and compliance. This is a great fit for someone who enjoys cleaning, organising, and handling sensitive HR data and who’s confident navigating legacy systems and older file structures. What You’ll Be Doing Managing HR data across legacy systems, backup drives, and SharePoint Supporting HR with ad hoc data queries and reporting tasks Locating, verifying and cleaning historical HR records Maintaining compliance and integrity across sensitive employee data Identifying gaps, errors, or inconsistencies using logical reasoning What They’re Looking For Experience handling HR data or other confidential records Familiarity with older file systems More ❯

tools to accelerate and enhance the migration process, and we’re looking for developers who are excited by the opportunity to work at the intersection of legacy systems, modern development, and AI-assisted engineering. Key Responsibilities - Collaborate with the existing team to re-engineer Oracle PLSQL stored procedures into C# services. - Design and implement .NET-based components … that integrate with both legacy PHP systems and new PostgreSQL databases. - Work closely with business analysts and stakeholders to ensure functional parity and identify opportunities for enhancement. - Participate in the design of a hybrid architecture that supports phased migration. - Use AI-assisted tools to analyze, translate, and optimize legacy code. - Support BAU operations during the … Required SkillsExperience - 5+ years of experience in .NET/C# development, with a strong focus on backend services and data access layers. - Proven experience in migrating legacy systems, especially from Oracle to PostgreSQL or similar. - Strong understanding of PL/SQL and experience translating stored procedures into application logic. - Familiarity with PostgreSQL, including performance tuning and SQL More ❯

tools to accelerate and enhance the migration process, and we’re looking for developers who are excited by the opportunity to work at the intersection of legacy systems, modern development, and AI-assisted engineering. Key Responsibilities - Collaborate with the existing team to re-engineer Oracle PLSQL stored procedures into C# services. - Design and implement .NET-based components … that integrate with both legacy PHP systems and new PostgreSQL databases. - Work closely with business analysts and stakeholders to ensure functional parity and identify opportunities for enhancement. - Participate in the design of a hybrid architecture that supports phased migration. - Use AI-assisted tools to analyze, translate, and optimize legacy code. - Support BAU operations during the … Required SkillsExperience - 5+ years of experience in .NET/C# development, with a strong focus on backend services and data access layers. - Proven experience in migrating legacy systems, especially from Oracle to PostgreSQL or similar. - Strong understanding of PL/SQL and experience translating stored procedures into application logic. - Familiarity with PostgreSQL, including performance tuning and SQL More ❯

in cloud architecture and implementation. - Bachelor's degree in computer science, Engineering, related field, or equivalent experience. - Substantial hands-on technical experience with mainframe, non-x86 legacy systems and with technologies such as COBOL, JCL, CICS, DB2 for z/OS, Assembler, PL/I, Java, Rexx, flat/sequential files, GDGs, and VSAM. - Proven track record … in a technical lead role migrating workloads from mainframe and non-x86 legacy systems to distributed x86 infrastructures either on-premises or on to the Cloud. - Deep experience integrating mainframe and non-x86 legacy systems with distributed Linux-based or Windows-based x86 servers. PREFERRED QUALIFICATIONS - Strong communication skills with the ability to explain … both technical and non-technical audiences - AWS associate or professional level certifications (e.g., Solutions Architect Associate or Professional, DevOps Engineer Professional) preferred - Experience leading customers with mainframe and legacy modernization initiatives. - Experience with tools and methodologies used to migrate mainframe workloads via hardware/middleware emulation, automated code conversion, and re-platforming. - Experience with analyzing on-premises mainframe More ❯

for ensuring all master data is maintained and managed with a clear focus on data quality Update and maintain account information - working in Infor and any legacy systems to manage account data Data is maintained in line with company policies and that any changes or discrepancies are identified and updated Mitigate business risks Manage onboarding process for … accounts to ensure data accuracy and key stakeholder communication New account set up of documents including Amber Road checks, ensuring CRM contacts are created Maintain product data within eCommerce systems and preparing item data for product registrations and any future solutions to ensure all product information is available to customers to order Update and maintain item data in line … with new launches and any changes as required to ensure continued availability of all products to market Update and maintain price books within Infor and legacy systems for all brands, including bespoke SLAs for customers To maintain Master Data within Infor (ERP) and legacy systems, to include account, contact, pricing, item, pack in, add More ❯

to get involved in a key ERP implementation project. The role will focus on cleansing data and will deliver the full ETL and Data Migration from legacy systems into Netsuite, as well as working with the business to troubleshoot any issues. Key requirements: Data Migration experience in a Netsuite ERP setting Experience across the full ETL lifecycle … from various legacy ERP systems or Financial Systems Experience in Data Extract, Transform, Load processes and hands-on Experience of Data Cleansing, includuing issue identification, troubleshooting and resolution Knowledge of Data migration technologies Responsibilities: Data Extraction, Transform and Load from legacy systems into the new Netsuite ERP solution Data Cleansing Transformation and Load More ❯

System Integrator partners to deliver solutions that redefine what's possible in legacy transformation Architect cloud-native ecosystems that leverage generative AI capabilities to rapidly transform outdated systems, turning decades-old applications into modern, scalable solutions Develop comprehensive transformation roadmaps that align technical excellence with business objectives, ensuring every modernization effort delivers maximum ROI and strategic value … measurable business impact A problem-solver with exceptional analytical abilities and experience addressing complex enterprise challenges that others consider unsolvable What You've Accomplished: Successfully modernized legacy systems at enterprise scale, transforming outdated applications into efficient, cloud-native solutions that drive business growth Designed and implemented architectures that deliver measurable business value, proving that technical transformation can … System Integrator partners to deliver solutions that redefine what's possible in legacy transformation Architect cloud-native ecosystems that leverage generative AI capabilities to rapidly transform outdated systems, turning decades-old applications into modern, scalable solutions Develop comprehensive transformation roadmaps that align technical excellence with business objectives, ensuring every modernization effort delivers maximum ROI and strategic value 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 ❯

a Shit." Senior Software Engineer (C++/Core Java) We are seeking a Senior Software Engineer to play a key role in the modernization of a large-scale legacy enterprise platform. This platform, critical to the core business operations, is built with a combination of C++ and Java , and requires careful evaluation, refactoring, and enhancement to align with … Conduct and participate in code reviews , architecture discussions, and technical deep dives. Ensure performance, scalability, and maintainability of all developed components. Preferred Profile Experience working in complex, enterprise-scale systems , especially modernization efforts. Ability to navigate ambiguity in legacy systems and drive incremental improvements. Comfortable with both hands-on coding and collaborative architectural discussions . A … mindset focused on quality, reliability, and long-term maintainability . Core Java (Concurrency, Multithreading, Collections, Streams) C++ (Legacy Systems, Memory Management, Performance Tuning) DevOps (Jenkins, Docker, CI/CD Pipelines - Nice to Have) Frontend (Angular - Nice to Have) Git, Maven/Gradle, JIRA, Agile methodologies Join Our Global Team: We invite you to apply for the position More ❯

design patterns API Development Building and maintaining RESTful APIs Solid understanding of HTTP protocols, status codes, headers, etc. API documentation using tools like Swagger/OpenAPI Legacy Systems Exposure to or experience with WCF services - we still support some older systems, so comfort working with a mix of modern and legacy tech is key … smart, supportive people who value clean code and collaboration You'll have space to grow, technically, professionally, and personally Experience Core C# & .NET Skills API Development Legacy Systems Security Integration & Communication Database Integration Keywords c# .Net API Location United Kingdom Apply today! We are valconeers Close Software Developer Job Primary Location: United Kingdom First Name Last Name More ❯

Senior .NET/C# Developer Oracle to PostgreSQL Migration: Our client is embarking on a strategic transformation of a legacy enterprise platform, rebuilding a … long-standing PHP and Oracle-based system into a .NET (C#) and PostgreSQL architecture. Seeking talented developers who are excited to work at the intersection of legacy systems, modern architecture and cutting-edge development tooling. Your Responsibilities: Re-engineer Oracle PL/SQL logic into performant and maintainable C# services. Design and build .NET components that interact … strategies and support comprehensive documentation efforts. What You'll Bring: Experience developing in .NET/C#, particularly in backend and data access layers. Proven success migrating legacy systems, especially from Oracle to PostgreSQL or similar. Strong working knowledge of Oracle PL/SQL and the ability to translate procedural logic into C#. Solid experience with PostgreSQL, including 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 ❯

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 ❯

Apply online only) per day Inside IR35 Contract role for an experienced Business Data Analyst required to support a large-scale transformation programme, focused on replacing legacy systems with Salesforce CRM and delivering strategic improvements to customer data. You'll bring proven experience in data analysis, data mapping, and data migration projects within CRM or enterprise system … strong advantage. This role is for a proactive and detail-oriented Data Analyst to support a major CRM and customer data transformation, including the migration from legacy systems to Salesforce. This role will focus on analysing customer data, documenting legacy structures, identifying data quality issues, and supporting data mapping, cleansing, validation, and reconciliation activities. Working … driving insight, enabling CRM optimisation, and ensuring the integrity and successful delivery of customer data throughout the migration process. Experience Required: Proven experience supporting data migration projects, including legacy data analysis and transformation. Familiarity with data governance frameworks, including stewardship, ownership, and quality monitoring. Proficiency in SQL, Excel, python and data visualisation tools (e.g., Power BI, Tableau). 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 ❯

the existing team to re-engineer Oracle PL/SQL stored procedures into C# services. Design and implement .NET-based components that integrate with both legacy PHP systems and new PostgreSQL databases. Work closely with business analysts and stakeholders to ensure functional parity and identify opportunities for enhancement. Participate in the design of a hybrid architecture that … Skills & Experience 5+ years of experience in .NET/C# development, with a strong focus on backend services and data access layers. Proven experience in migrating legacy systems, especially from Oracle to PostgreSQL or similar. Strong understanding of PL/SQL and experience translating stored procedures into application logic. Familiarity with PostgreSQL, including performance tuning and SQL … dialect differences. Experience working in hybrid environments where legacy and modern systems coexist. Comfortable using AI tools (e.g., GitHub Copilot, ChatGPT, code translators) to assist in development and migration tasks. Solid understanding of software architecture, design patterns, and integration strategies. Excellent communication skills and ability to work collaboratively in a cross-functional team. Desirable Skills Experience with 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 ❯

actionable insight? We're looking for a Salesforce Data Analyst to support a major Enterprise Data transformation programme, playing a key role in the migration from legacy systems to the new Salesforce platform. As a Salesforce Data Analyst, you will support the successful delivery of our customer and CRM data strategy as part of a multi-year … transformation. In the early phase of the project, you'll be responsible for documenting current ('as-is') data structures, analysing legacy CRM systems, and identifying data quality issues and migration requirements. You will work across multiple teams to ensure data integrity, support effective data governance, and drive data quality during and after migration. This role is essential … processes Skills & Experience Strong background as a Data Analyst, with a focus on customer and CRM data Proven experience in data migration projects, particularly involving legacy CRM systems and Salesforce Hands-on experience with SQL, Excel, Python, and visualisation tools (Power BI or Tableau) Familiarity with Salesforce data models (Leads, Opportunities, Contacts, Accounts) Experience with Snowflake is 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 … 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 ❯

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 ❯

architectural standards. Support quality assurance through proactive review cycles, test planning, and post-implementation validation of solutions to ensure benefits are realised. Maintain strategic oversight of legacy systems such as Verint where appropriate, while helping shape our roadmap toward cloud-first, digitally enabled platforms. What You'll Bring to British Airways: A passion for crafting excellent customer … system integration, service-level agreements, and cloud-based deployment strategies. Solid grasp of Agile and SAFe methodologies, with experience working in digital product teams. Familiarity with legacy systems such as Verint and a strategic approach to migration or coexistence planning. Excellent understanding of cloud infrastructure, security, and enterprise integration. What we offer: We believe that all the More ❯