1 to 25 of 657 Legacy Systems Jobs in the UK

over 20 years quietly powering some of the UK’s most complex networks -and now we’re growing fast. We’re looking for a Systems Data Architect to take ownership of how data and systems should work together across the business. You’ll reverse-engineer existing and legacy systems, establish the true current state, and design practical future-state data architecture, data flows and integrations that Development can implement. What it’s really like here The pace and intensity are higher than most environments in our sector. The workload is typically around 30% greater than ...

Legacy Systems Discovery & Migration Readiness Contract/Freelance (Initial 5–15 day engagement) Hybrid/On-site required initially (North West England) MadeByAI is seeking an experienced technical contractor to support the discovery, interrogation and documentation of a complex legacy business systems environment … part of a wider AI and systems transformation programme. This is not a typical software development role. The environment We are specifically looking for someone who is comfortable working with mature, business-critical systems that have evolved over decades. The environment includes: Microsoft Access applications VBA/Visual ...

join a well-established, cash rich business in this Director position. This is a pivotal moment in the evolution from legacy systems to a modern business, driving increased revenues and profits . This is a rare opportunity to lead a 2 year transformation of legacy ICT systems and ways of working, shaping the business into a modern, agile technology driven organisation that underpins growth, then afterwards undertake the ongoing IT Director role. You will work with the CEO and be at the centre of strategic decision-making, driving change and leading ...

join a well-established, cash rich business in this Director position. This is a pivotal moment in the evolution from legacy systems to a modern business, driving increased revenues and profits . This is a rare opportunity to lead a 2 year transformation of legacy ICT systems and ways of working, shaping the business into a modern, agile technology driven organisation that underpins growth, then afterwards undertake the ongoing IT Director role. You will work with the CEO and be at the centre of strategic decision-making, driving change and leading ...

Data Integration Architect (SQL, Reverse Engineering, MSSQL API) Our client is seeking Data Integration Architect to take ownership of how data and systems interact across a growing and evolving organisation. This is a highly influential role that combines investigative analysis with future-state design. You'll reverse-engineer existing … legacy systems, uncover how they truly operate, and translate that understanding into scalable, practical architectures that development teams can implement. If you enjoy solving complex system challenges, making sense of undocumented processes, and designing clear, effective solutions, this role offers the opportunity to make a significant impact. ...

MadeByAI is seeking an experienced technical contractor to support the discovery and documentation of a complex legacy systems environment in the North West of England. This position requires strong analytical skills and experience with legacy systems, specifically those reliant on Microsoft Access and SQL. … role focuses on understanding existing systems, identifying risks, and preparing for future migration. The contractor should thrive in challenging environments, especially with business-critical systems. #J-18808-Ljbffr ...

Business Systems Specialist (Manufacturing) Hydram Engineering | Chilton, County Durham Contract 18-month fixed-term, with potential for extension Salary £50,000 – £65,000 DOE Hours Full-time (38.5 hrs/wk) or part-time (25.5 hrs/wk) considered Working pattern Mon–Thu 8:00am–5:00pm … core transactional system with a new implementation of Epicor's Kinetic ERP platform — a challenging project given how established and interconnected our existing systems are. Our current two-person IT systems team brings strong development and integration experience but lacks the capacity and Epicor-specific expertise to achieve ...

advanced containerisation initiatives and improving the developer experience across the organisation. We’re particularly interested in engineers with deep experience modernising legacy systems, integrating CI/CD pipelines and mentoring senior technical teams. The Opportunity As Principal Engineer, you’ll lead pivotal engineering initiatives focused on making … complex Java estate fully containerisable. You’ll use your technical expertise to replatform, refactor and rebuild legacy systems, ensuring they integrate effectively with modern developer tooling and CI/CD pipelines. Alongside hands-on technical delivery, you’ll provide leadership and mentorship to senior engineers while promoting ...

standard range are managed through governance controls to protect internal equity.At Leonardo in Yeovil we are seeking an experienced **Software Engineer******-** Mission Management Systems** to drive the end-to-end development of high-integrity aircraft software during a critical technical pivot. This role focuses on the evolution … Tactical Mission Management Systems—maintaining the reliability of our legacy manned platforms while architecting the software for our emerging uncrewed and autonomous capabilities.**Your impact**Working within our Helicopter division, you will be taking ownership of complex mission system software component, ensuring legacy systems ...

Were looking for an experienced Systems Analyst to support a major Data Migration and SaaS implementation project within the financial services environment. The role will support the replacement of a legacy collections platform with a new SaaS solution, with a strong focus on data migration, systems … functional requirements. Define project scope, objectives, backlog items and refinements. Support solution design and development across internal teams and external vendors. Lead Systems Integration Testing (SIT) and support User Acceptance Testing (UAT). Support implementation, operational readiness and transition into live service. Work with external suppliers to ensure delivery ...

Convergence Group in Solihull is seeking a Systems Data Architect to own data and systems integration. You will reverse-engineer legacy systems, map current data flows and design practical future-state architectures that Development can implement. You will deliver clear data structures, interfaces and models ...

will lead the development and implementation of digital transformation initiatives, including the adoption of emerging technologies such as Artificial Intelligence (AI), the modernisation of systems and processes, and the reduction of reliance on legacy systems and tools. The CTO will champion digital innovation, enhancing operational efficiency … Digital and Technology Strategy, ensuring alignment with business objectives. Lead digital transformation programmes, including AI adoption and system modernisation. Drive the modernisation of business systems and processes, leading the replacement of legacy systems and tools with innovative, future focused solutions that enhance organisational capability and efficiency. ...

total software engineering experience with a track record of successfully managing, scaling, and transforming engineering teams within a fast-paced SaaS environment.* Mobile & Systems Architecture Depth: Hands-on expertise in modern mobile application development (iOS, Android, React Native, or Flutter) alongside proven experience navigating hybrid environments combining legacy systems and cloud microservices.* AI Conviction: Genuine conviction about AI in engineering—you've moved teams beyond AI as a curiosity to AI as a core capability multiplier in developer workflows and product features.* Pragmatic Debt Navigator: A track record of navigating legacy systems ...

Core Responsibilities : Lead the design, architecture, and implementation of scalable APIs, services, and accessibility-first user interfaces. Drive the modernization of legacy systems into modular, event-driven, API-first components. Deliver AI-native features and improvements across both front-end and back-end, using multiple programming languages … accountability for outcomes from design through to production. Experience with cloud platforms such as Azure, AWS, or GCP. Experience with event-driven architectures, distributed systems, or microservices. Experience modernizing legacy systems into modular, scalable platforms. Experience working in cross-functional product teams. Experience mentoring engineers ...

architectures Build and maintain CI/CD pipelines tailored to client deployment workflows and change management processes Troubleshoot integration issues across legacy systems, APIs, databases, and cloud services in real time during deployment windows Create deployment runbooks, technical documentation, and knowledge-transfer materials for client operations teams … tuning, and issue resolution during the stabilization period What We're Looking For 3+ years of experience in deployment engineering, DevOps, site reliability, or systems integration roles Strong hands-on experience with containerization and orchestration technologies, particularly Docker and Kubernetes Proficiency in at least one major cloud platform ...

annum, dependant upon skills and experience as well as car allowance, bonus and benefits package Equans UK is undertaking a major workforce systems transformation, migrating HR and payroll data for approximately 2,300 employees from HR.net and MiraclePay into SAP ECC6. We are recruiting a senior Data Analyst … lead and own the end-to-end data migration lifecycle for this project: receiving data extracts from source systems, cleansing and validating them, mapping them to SAP field structures, loading into SAP, and validating the results post-load. This is a hands‐on, delivery-focused role suited to someone ...

build new solutions in support of strategic business initiatives, andinitiatives and mature our existing software and efficiently migrate and re-platform legacy systems to the cloud, using cloud native design patterns. Working closely with the enterprise architecture stream and platform engineering team to ensure alignment to organisational … assist the wider scrum team in taking accountability for theirs Work with platform engineering to automate build and deploy of existing and new systems Support the strategic goals of Capital Markets development; greenfield initiatives, replatforming and consolidating legacy systems, and adopting an automation-first approach ...

years of total software engineering experience with a track record of successfully managing, scaling, and transforming engineering teams within a fast-paced SaaS environment.Mobile & Systems Architecture Depth: Hands-on expertise in modern mobile application development (iOS, Android, React Native, or Flutter) alongside proven experience navigating hybrid environments combining legacy systems and cloud microservices.AI Conviction: Genuine conviction about AI in engineering—you've moved teams beyond AI as a curiosity to AI as a core capability multiplier in developer workflows and product features.Pragmatic Debt Navigator: A track record of navigating legacy systems and technical ...

execution of the technical vision and strategy across multiple squads. Lead the design, architecture, and development of scalable, reliable, and high-performance software systems, including system design, technology selection, and overall architecture. Champion data integrity and performance, ensuring systems are designed for scalability and operational resilience. … telemetry, alerts, and logs to ensure system reliability and performance. Expertise in data architecture and modelling, with a strong understanding of legacy systems and performance optimisation techniques relevant to operational data platforms. Proven experience designing and implementing event-driven architectures (EDA) to support real-time data flows. ...

execution of the technical vision and strategy across multiple squads. Lead the design, architecture, and development of scalable, reliable, and high-performance software systems, including system design, technology selection, and overall architecture. Champion data integrity and performance, ensuring systems are designed for scalability and operational resilience. … telemetry, alerts, and logs to ensure system reliability and performance. Expertise in data architecture and modelling, with a strong understanding of legacy systems and performance optimisation techniques relevant to operational data platforms. Proven experience designing and implementing event-driven architectures (EDA) to support real-time data flows. ...

processes and data transformation logic to improve and normalise financial data. Validate and reconcile data loaded into Workday, ensuring consistency with legacy systems and financial requirements. Engage regularly with clients throughout the project lifecycle, ensuring a smooth transition from legacy systems to Workday Financials. … Skills & Requirements: Bachelor's degree or equivalent experience in Information Technology, MIS, Finance, or a related field. Experience in ERP data conversion or financial systems implementation. Experience with Workday Financials is essentialUnderstanding of financial data structures, including General Ledger, transactions, and reporting frameworks. Experience with data conversion, migration ...

stack Identified gaps, risks, and constraints Target architecture aligned to business and product direction Migration and/or retirement proposals for legacy systems Ensure transition plans are: Realistic and incremental Aligned with delivery priorities Understood by engineering and product teams 5. Cross-Domain Alignment & Delivery Support Support … Experience, Knowledge, Skills, Abilities, Education) Required Experience 15+ years of experience in software engineering, with significant time in architectural roles Proven experience designing distributed systems across cloud and application layers Strong experience with at least one major cloud platform (Azure, AWS, or GCP), ideally across multiple Experience integrating hardware ...

.NET, Azure, SQL Server, and modern web technologies. This role is ideal for someone who enjoys working across both modern and legacy systems, values clean code and software quality, and thrives in a collaborative Agile environment. Competitive salary, long-term career progression, and the opportunity to make … practices, and comfortable working across modern and legacy technology stacks. You will play a key role in developing scalable applications, improving existing systems, and contributing to continuous improvement initiatives across the wider technology function. Key Responsibilities Software Development & Delivery Design, develop, test, and maintain high-quality software ...

design and delivery of scalable, secure, cloud-first integrations that power real business impact? Excited by the challenge of modernising legacy systems while driving best-practice engineering across Agile teams? As our Integration Lead Developer, youll drive the organisations integration capabilitydesigning and delivering secure, scalable solutions that … connect systems, products and partners. Youll act as the technical authority for APIs, define integration patterns, build reusable components and champion cloud-first (AWS) delivery. Working hands-on in an Agile environment, youll modernise legacy systems, support enterprise architecture evolution and collaborate across teams to enable ...

teams, driving large‐scale modernization programs, and fostering a culture of innovation. You will be at the forefront of transforming our legacy systems into a modern, data‐enabled, and microservices‐based architecture to support our growing business needs. Key Responsibilities Technology Leadership & Strategy Define and execute … Finance, Agency Lending, or Collateral Management/Optimization is strongly preferred. Proven experience leading a successful, large‐scale technology transformation from legacy systems to a microservices‐based architecture. Education Bachelor’s or Master’s degree in Computer Science, Engineering, or a related technical field. Desired Skills Technical ...