101 to 125 of 457 Legacy Systems Jobs in the UK

phase of their tech journey. What You’ll Be Doing: You’ll lead on rebuilding a high-volume pricing platform, modernising legacy systems, and supporting complex backend architecture. While the role leans heavily towards backend work, you’ll occasionally contribute to front-end projects to ensure seamless … integration across systems. Key Responsibilities: Rebuild and modernise existing systems with minimal PHP maintenance. Design and develop backend services in C# and PostgreSQL . Collaborate on front-end features using Node.js and React when needed. Support Python-based AI content projects. Apply your DevOps and Linux expertise to ensure … of projects from concept to delivery in a flat, agile team. What You’ll Need: Strong backend experience (C# preferred), with solid PostgreSQL knowledge. Systems architecture and API integration experience. Comfortable with front-end tech (Node/React) for full-stack delivery. DevOps skills: Linux command line, Docker, AWS More ❯

for a senior architect with strong experience in platform modernization. WMT needs an architect to design a roadmap to modernize key legacy systems and technology stacks. Looking for thought leadership in terms of both strategic design and also reduced effort of migration, as well as an eye More ❯

teams offer you an environment that will present you with exciting challenges - be it through the support and further development of legacy systems or the introduction of modern technologies such as AI, machine learning and highly automated trading applications. Our Technology department of around 300 employees works More ❯

CRM modules, including Sales, Customer Service, and Marketing, to meet business requirements. Data Migration: Ensure smooth data migration, integrity, and testing from the legacy Dynamics 2011 system to D365 CE Online. Collaboration: Work closely with functional consultants, project managers, and the wider development team to ensure successful project More ❯

solutions aligned with user needs and business goals. Ensure compliance with architectural standards and design patterns. Develop strategic roadmaps for new services and legacy system integration. Work with Data Architects to maintain enterprise data models. Champion agile development practices. Mentor staff and lead continuous improvement projects. Skills & Experience More ❯

data processing and reporting. Automation and Efficiency: Develop and implement VBA macros to automate data migration and reconciliation activities, including the transformation of legacy system journals into OneStream-compatible formats. Reporting and Analysis: Create OneStream Excel add-in formulae to efficiently extract and analyse data from OneStream for More ❯

operational systems. Working across business units, this role will focus on data strategy, modelling standards, and the migration of data from legacy systems into a modern Azure-based environment. Key Skills & Experience: Strong experience in conceptual, logical, and physical data modelling Excellent knowledge of metadata management and More ❯

initiatives such as cloud migration, workforce enablement, and innovation Operations and improvement Monitor and optimise performance of cloud and Microsoft environments Collaborate on legacy system migration and manage vendor lock-in Enhance operational efficiency through automation and DevOps best practices Strategic contribution Support scalability, cost optimisation, and decision More ❯

a Cutover role, you would plan, manage, and execute the cutover activities for SAP implementations to ensure a smooth transition from legacy systems to SAP solutions. As PMO, you will be responsible for the definition of project management and governance processes for the SAP implementation, while supporting More ❯

experience is essential You have experience with building APIs, microservice, and event-driven solutions You have experience integrating with greenfield and legacy systems You have experience working with NoSQL & relational databases You believe that testing and software quality is everyone's responsibility, have experience with both unit More ❯

and querying of both transactional and analytical databases A proven track record of delivering end to end solutions and supporting incremental updates to legacy systems. 5+ years of professional .NET experience: Entity framework 6 and Core ASPNET MVC and MVC Core Data manipulation and querying in a conventional More ❯

extraction of existing data and alignment with SAP S/4 HANA requirements. You will be developing and maintaining ETL scripts to transform legacy … data into the format required for SAP S/4 HANA, whilst validating and troubleshooting data quality issues, ensuring consistency between legacy systems and SAP, thus ensuring a smooth transition to SAP S/4 HANA. What you'll need to succeed * Strong proficiency in SQL, including More ❯

Integration Lead. This hire will help architect and execute the company-wide data infrastructure from the ground up. Building the data warehouse, connecting disparate systems, and driving the overall data vision. £500 p/day (Outside IR35) 6 months (with view to extend) Hybrid - London (city)/remote. The … and scalable data infrastructure. Proven experience in building and managing data warehouses (e.g., Microsoft, Oracle, or Snowflake platforms) Strong familiarity with Microsoft and Oracle systems and environments is essential Deep experience integrating CRM and financial platforms Solid understanding of ETL/ELT processes and modern data pipeline tools Hands … on experience managing data migrations from diverse legacy systems into new consolidated environments (e.g., post-M&A or system upgrades) Strong strategic mindset with the ability to own, articulate, and execute a data strategy Excellent communication and stakeholder management skills, with the ability to influence at all More ❯

another architecture role. This is a chance to make a tangible impact in a truly enterprise-scale environment , working with high-traffic applications, distributed systems, and cloud-first engineering teams . You will: Define and lead the AWS cloud strategy for large-scale SaaS platforms. Architect and implement cloud … native, event-driven, microservices-based solutions . Drive modernisation initiatives , replacing legacy systems with state-of-the-art cloud solutions. Work closely with engineering teams, guiding them on best practices in .NET, AWS, and cloud security . Influence technical decision-making at the highest levels while remaining … DevOps, and Infrastructure as Code (Terraform, CloudFormation) . ? A collaborative, pragmatic approach , comfortable influencing both engineers and senior stakeholders. ? Experience in large-scale distributed systems and enterprise environments. Why Join? Exceptional package Up to £100K base + 15-30% bonus + up to £10K car allowance. True hybrid working More ❯

your role. This is an exciting time to join the team as you will be involved in developing and re-architecting legacy systems using cutting-edge technologies and driving the business into the Big Data era. Job responsibilities Executes standard software solutions, design, development, and technical troubleshooting … Tests with Flexible/Open Source Frameworks using a Test Driven Development approach Designs, develops, codes, and troubleshoots with consideration of upstream and downstream systems and technical implications Applies knowledge of tools within the Software Development Life Cycle toolchain to improve the value realized by automation Applies technical troubleshooting … making in service of secure, stable application development Learns and applies system processes, methodologies, and skills for the development of secure, stable code and systems Participates in regular standups and code reviews Adds to team culture of diversity, equity, inclusion, and respect Required qualifications, capabilities, and skills Formal training More ❯

Provide accurate progress reports to clients and internal stakeholders. Oversee user testing, issue management, and prioritization. Ensure smooth data migration from legacy systems to target solutions. Manage scope, risks, and changes, ensuring alignment with the agreed solution and business case. Collaborate with internal teams, mentor junior members … and drive process improvements. Qualifications: Strong experience in Project Management, particularly in Agile environments. Knowledge of front, middle and back office Background in Trading Systems Proven ability to manage complex projects and deliver high-quality results. Excellent communication and stakeholder management skills. Experience with data migration and user testing. More ❯

Provide accurate progress reports to clients and internal stakeholders. Oversee user testing, issue management, and prioritization. Ensure smooth data migration from legacy systems to target solutions. Manage scope, risks, and changes, ensuring alignment with the agreed solution and business case. Collaborate with internal teams, mentor junior members … and drive process improvements. Qualifications: Strong experience in Project Management, particularly in Agile environments. Knowledge of front, middle and back office Background in Trading Systems Proven ability to manage complex projects and deliver high-quality results. Excellent communication and stakeholder management skills. Experience with data migration and user testing. More ❯

applications, public-facing corporate sites, and dozens of internal bespoke web applications. Almost every person in the BBC uses at least one of our systems every week, and our audience-facing sites receive millions of views from the public every month. We're looking for an experienced full-stack … as React, Node.js and AWS is a bonus. Are you the right candidate Essential • Excellent PHP skills • Excellent experience designing and optimising relational database systems • Familiarity with frontend technologies such as HTML, CSS & JavaScript • Experience leading large/complex projects • Excellent communication skills with an ability to collaborate with … code reviews, agile planning and continuous delivery Desirable • Experience identifying and fixing accessibility issues • jQuery experience • Experience managing or working on legacy systems • Experience with data flow modelling • React, Node.js & AWS skills About the BBC The BBC is committed to redeploying employees seeking suitable alternative employment within More ❯

the company’s hydrogen production and sales operations. This role is instrumental in advancing the digital transformation agenda by integrating isolated legacy systems, deploying new digital tools, and ensuring full compliance with evolving regulatory frameworks. The ideal candidate will combine technical acumen with excellent programme management skills … custom web-based production planning tool Carbon, pricing, and scheduling data from electricity providers Data from hydrogen production plant PLCs Logistics partner transport management systems (TMS) Invoicing and financial processes through Microsoft Dynamics Core Objectives: Ensure compliance with UK regulatory and pricing mechanisms, including the Low Carbon Hydrogen Standard … Sound financial and budgeting capabilities Effective multitasking and problem-solving abilities under pressure Proficiency in project management tools (e.g. Microsoft Project) Experience integrating diverse systems and technologies Knowledge of Python is a plus Familiarity with UK low-carbon certification schemes (LCHS, RTFC) is advantageous More ❯

the company’s hydrogen production and sales operations. This role is instrumental in advancing the digital transformation agenda by integrating isolated legacy systems, deploying new digital tools, and ensuring full compliance with evolving regulatory frameworks. The ideal candidate will combine technical acumen with excellent programme management skills … custom web-based production planning tool Carbon, pricing, and scheduling data from electricity providers Data from hydrogen production plant PLCs Logistics partner transport management systems (TMS) Invoicing and financial processes through Microsoft Dynamics Core Objectives: Ensure compliance with UK regulatory and pricing mechanisms, including the Low Carbon Hydrogen Standard … Sound financial and budgeting capabilities Effective multitasking and problem-solving abilities under pressure Proficiency in project management tools (e.g. Microsoft Project) Experience integrating diverse systems and technologies Knowledge of Python is a plus Familiarity with UK low-carbon certification schemes (LCHS, RTFC) is advantageous More ❯

requirements. The Project Manager will work closely with technical teams, business stakeholders, and external partners to drive the transformation from legacy data systems to a cloud-based SAP Data Sphere environment. Key Responsibilities: Develop detailed project plans, timelines, and resource allocation for the SAP Data Sphere modernization … goals. Stay up to date with industry trends, emerging technologies, and SAP Data Sphere capabilities. Required Qualifications: Bachelor's degree in Computer Science, Information Systems, Business Administration, or a related field. Master's degree preferred. Minimum 7-10 years of experience in project management, with a focus on data … requirements. The Project Manager will work closely with technical teams, business stakeholders, and external partners to drive the transformation from legacy data systems to a cloud-based SAP Data Sphere environment. Key Responsibilities: Develop detailed project plans, timelines, and resource allocation for the SAP Data Sphere modernization More ❯

collaborative and innovative environment, supporting the FX Options Trading business. The team focuses on developing cutting-edge solutions while transitioning from legacy systems, and this is an exciting opportunity to work on high-impact projects in a fast-paced front office environment . Key Responsibilities: Develop, deploy … closely with brokers, external clients, and business partners to expand and improve electronic offerings. Ensure system integration with upstream trade execution platforms and enhance systems to meet regulatory requirements (MiFID II, UMR, IMM). Liaise with teams across Trading, Sales, Market Risk, and Operations to gather requirements and implement More ❯

University's IT landscape, ensuring alignment with institutional goals and objectives. The Enterprise Architect will lead the review of the existing on-premise legacy estate, recommend optimal future-state architectures, and develop comprehensive roadmaps for migration and modernization. This position requires a deep understanding of enterprise architecture principles … standards, and principles, ensuring alignment with institutional strategic goals. Roadmap Development: Lead the assessment of the current IT landscape (on-premise legacy systems) and develop comprehensive roadmaps for future-state architectures, including cloud migration (Azure), application modernization (CRM/ERP), infrastructure upgrades, and security enhancements. Technology Leadership … unique challenges and opportunities within a higher education environment to develop effective and relevant architectural solutions. Qualifications: Bachelor's degree in Computer Science, Information Systems, or a related field; Master's degree preferred. Extensive experience (typically 10+ years) in IT, with a focus on enterprise architecture. Proven experience in More ❯

University's IT landscape, ensuring alignment with institutional goals and objectives. The Enterprise Architect will lead the review of the existing on-premise legacy estate, recommend optimal future-state architectures, and develop comprehensive roadmaps for migration and modernization. This position requires a deep understanding of enterprise architecture principles … standards, and principles, ensuring alignment with institutional strategic goals. Roadmap Development: Lead the assessment of the current IT landscape (on-premise legacy systems) and develop comprehensive roadmaps for future-state architectures, including cloud migration (Azure), application modernization (CRM/ERP), infrastructure upgrades, and security enhancements. Technology Leadership … unique challenges and opportunities within a higher education environment to develop effective and relevant architectural solutions. Qualifications: Bachelor's degree in Computer Science, Information Systems, or a related field; Master's degree preferred. Extensive experience (typically 10+ years) in IT, with a focus on enterprise architecture. Proven experience in More ❯

Senior Systems Engineer (AWS) Technology Sector | UK (Hybrid Working) £70,000 - £90,000 An exciting opportunity has arisen for an experienced Systems Engineer with a strong background in cloud platforms, particularly AWS, to drive technical innovation, ensure robust system performance, and maintain the highest levels of security. This … Optimisation: Monitor, assess, and optimise system performance, utilising Cloudflare to enhance security and speed. Migration and Modernisation: Lead migration projects, modernising legacy systems and adopting serverless technologies where appropriate. Cost Management: Drive efficiency through cost optimisation strategies and effective budget management. Team Leadership: Mentor technical teams and More ❯