1 to 25 of 168 Legacy Systems Jobs in the UK

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. ...

Title: Systems Engineer Location: Remote + Quarterly Planning Sessions in Bristol Remuneration: £600 per day via Umbrella Company Contract Details: Temporary - 6 Months (Scope for Extensions) Responsibilities: Our client is seeking a talented Systems Engineer to play a pivotal role in a transformative modernisation programme. The organisation … replacing ageing on-premises systems with a cutting-edge cloud-native architecture within a greenfield AWS environment. This is an exciting opportunity to contribute to significant advancements in technology and operational excellence. Key responsibilities include: Analysing and understanding existing legacy systems and infrastructure. Collaborating with stakeholders ...

Data Migration | ETL | Legacy Systems | Cloud Technology | Actionstep Complex Data. Critical Migrations. Real Ownership. Know your way around a legacy database? Confident untangling complicated data structures and getting business-critical migrations over the line? At Nexian , we're helping law firms move beyond outdated systems … Microsoft technologies. As Actionstep Global Partner of the Year 2026, we're helping legal practices transition from legacy practice and case management systems to modern cloud-based platforms. Demand for these projects is growing, and we're expanding our data migration capability to support more clients, deliver ...

differentiator. We are modernising the platforms that power how M&S Foods designs products, collaborates with suppliers and manages commercial decisions. These systems sit at the centre of the M&S Foods ecosystem and support thousands of internal users and suppliers across product development, supply chain and commercial operations. … establish shared technical patterns that enable teams to build safely and efficiently. Our focus is evolving a complex landscape of legacy systems and point-to-point integrations into modern API-led and event-driven distributed systems that are easier to scale, operate and extend. ...

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. ...

.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 ...

pick up new domains quickly and often. A multi-agent case-handling assistant for a public sector client, retrieving from several legacy systems of record, with full audit trails and human-in-the-loop approval on every outbound decision. A document-intelligence pipeline for a utilities client … pick up new domains quickly and often. A multi-agent case-handling assistant for a public sector client, retrieving from several legacy systems of record, with full audit trails and human-in-the-loop approval on every outbound decision. A document-intelligence pipeline for a utilities client ...

long-term maintainability Guide API and domain design standards - clear service boundaries, consistent contracts, and pragmatic integration between modern services and legacy systems Shape event-driven and integration patterns so teams can build independently without breaking cross-squad journeys Champion automated testing, observability, and production readiness … Oversee database and schema evolution practices - migrations, data integrity, and performance - in partnership with platform and infrastructure teams Lead incident response for backend-owned systems - triage, escalation, post-incident reviews, and runbook quality Mentor engineers on PHP (Yii/Yii2), Go, Security, Performance and Optimisation - raising the bar through ...

Agile product development teams Experience contributing to large-scale application modernisation or transformation programmes Comfortable working with both modern and complex legacy systems Strong understanding of software development lifecycles, testing strategies, and quality assurance best practices Experience collaborating closely with developers, product managers, and engineering teams Technical … Agile product development teams Experience contributing to large-scale application modernisation or transformation programmes Comfortable working with both modern and complex legacy systems Strong understanding of software development lifecycles, testing strategies, and quality assurance best practices Experience collaborating closely with developers, product managers, and engineering teams Technical ...

sales, not a service function. Teams ship high-quality software frequently and predictably. Platforms are scalable, secure and future-ready, with legacy systems retired and technical debt under control. Engineers use AI and modern tooling to work faster and better. Engineering is a place where strong people … Champion agile ways of working and keep improving how teams plan, build, test and ship. Platform, ad serving and scaleOwn the engineering of the systems that carry the marketplace: hosting and distribution, real-time and dynamic ad insertion, the auction and yield layer, the data platform behind targeting ...

Business Systems Analyst Location: Cullompton About Us: Welcome to Gregory Distribution Ltd, where technology and logistics come together to drive operational excellence. As part of our commitment to continuous improvement, we are undertaking a group-wide IT equipment upgrade. Join our dynamic Technology Team and be part … project that will modernise and enhance our IT infrastructure across the UK. Job Description: Join our dynamic Technology team as an IT Business Systems Analyst , where you'll play a pivotal role in shaping and supporting the systems that drive our visionary logistics solutions. This is more than ...

/CD workflows, focusing on consolidation, automation, and scalability. Drive the design and development of system architecture, work with end-users of the systems, and enhance the quality of deliverables Ensure staff follows Citi documented policy and procedures as well as maintain desktop procedures and supporting documentation for filings … degree or above (or equivalent education) in a STEM discipline. Proven experience in software engineering and development, and a strong understanding of computer systems and how they operate. Hands on Experience in Java , Spring, Understanding of ultra-low-latency development practices. Proven understanding of FX highly preferredWell versed with ...

Control Systems Engineer x2 £45-60k + Paid Overtime, Pension, Training, 23 Days Holiday + Bank Holidays Hinckley/Coventry - Hybrid/Flexible Working Available Ref: 25681 A fantastic opportunity has arisen for two experienced Controls Engineers to join a well-established and growing control systems engineering … across sectors including Automotive, Food & Beverage, Aerospace and Pharmaceutical, taking projects from software design and development through to testing, commissioning and customer handover. Control Systems Engineer – The Role: Design and develop PLC software from first principles for bespoke industrial automation systems Program primarily Siemens TIA Portal/ ...

Control Systems Engineer x2 £45-60k + Paid Overtime, Pension, Training, 23 Days Holiday + Bank Holidays Staffordshire - Hybrid/Flexible Working Available Ref: 25719 A fantastic opportunity has arisen for two experienced Controls Engineers to join a well-established and growing control systems engineering business. Following … Staffordshire, the role is commutable from Stafford, Cannock, Rugeley, Lichfield, Tamworth and surrounding areas, with customer-site travel required during commissioning phases. Control Systems Engineer – The Role: Design and develop PLC software from first principles for bespoke industrial automation systems Program primarily Siemens TIA Portal/ ...

migration strategies for complex enterprise SAP S/4HANA transformation projects. Youll bridge the gap between functional business requirements and technical implementation, ensuring legacy data is cleansed, mapped, transformed, and seamlessly migrated into the S/4HANA environment with zero compromise on data integrity, governance, or business continuity. … deep understanding of S/4HANA unified data models (Universal Journal/ACDOCA, BP Model). Experience migrating data from diverse legacy systems (SAP ECC, Oracle, Salesforce, legacy mainframe/ERP systems). Bachelors degree in Computer Science, Information Technology, Business Information Systems ...

delivery, providing practical technical leadership to development teams while defining a scalable, long-term architectural approach. Define the software architecture for complex automation and systems integration projects. Design scalable, secure and maintainable applications using C#/.NET, Python and Django . Establish clear architectural standards, design principles and technology … roadmaps. Translate customer, operational and engineering requirements into practical technical solutions. Design platforms that integrate business applications, databases, automation systems, third-party products and physical equipment. Define service boundaries, APIs, data flows, interface specifications and integration patterns. Produce architecture diagrams, technical designs, data models and supporting documentation. Design distributed ...

delivery, providing practical technical leadership to development teams while defining a scalable, long-term architectural approach. Define the software architecture for complex automation and systems integration projects. Design scalable, secure and maintainable applications using C#/.NET, Python and Django . Establish clear architectural standards, design principles and technology … roadmaps. Translate customer, operational and engineering requirements into practical technical solutions. Design platforms that integrate business applications, databases, automation systems, third-party products and physical equipment. Define service boundaries, APIs, data flows, interface specifications and integration patterns. Produce architecture diagrams, technical designs, data models and supporting documentation. Design distributed ...

Designing and implementing data mapping and transformation processes will be a major part of your role as you move data from legacy systems to modern platforms. ETL (Extract, Transform, Load) Processes : You’ll build and optimise ETL scripts and tools to ensure seamless data flow—extracting from ...

join a team establishing a new Data Platform for ETEL, working with other parts of the business to migrate data from legacy systems and establishing pipelines to move data from new applications to the data platform while adopting standard best practices. Starting with Stapleton … Azure Synapse, PostgreSQL, ADF, Python) Develop data sets which are optimised for their given use case, e.g. self-service analytics Migrate data from legacy reporting solutions onto the Azure Data Platform, ensuring that data integrity and service levels are maintained Automation of end-to-end data flows Creation ...

design, build and implementation of solutions and enhancements that align with strategic business goals Prepare, review and maintain documented requirements for enhancements to systems and/or business processes, optimizing efficiency and consistency Taking ownership for the project management of smaller initiatives, including the provision of delivery status updates … requirements and will in some instances involve the build/maintenance of full AI solutions including GenAI Agents. Supporting the implementation of data mastering systems Reviewing data usage patterns to identify redundant or duplicated datasets that can be consolidated or retired Supporting the migration from legacy systems ...

company that's building a suite of next-generation AI products from the ground up. This isn't a role focused on maintaining legacy systems. You'll be part of a small, highly experienced engineering team responsible for transforming ambitious ideas into production-ready software. Working closely with ...

Data Analyst to join a growing Data & Analytics team. The successful candidate will be responsible for managing, analysing and preparing data, maintaining reporting systems and producing accurate insights to support business decisions. Working closely with stakeholders across the organisation you will develop and maintain reports using Power … improve the quality and accessibility of business-critical information. You will also support wider data improvement initiatives, including the transition from legacy systems to cloud-based solutions. This is a varied role suited to an analytical and technically minded individual with strong reporting, data management and communication ...

transformation and integration solutions. Role Overview: Develop and deliver data migration and integration solutions across multiple systems. Extract, transform and load data from legacy applications into a modern cloud-based platform. Develop and optimise complex SQL queries, scripts and transformation processes. Build and maintain reliable data pipelines using …/.NET development experience. Bash/Linux. Azure Blob Storage, Parquet, DuckDB and bulk data loading. SSDT/DACPAC. Experience migrating legacy systems into modern cloud platforms. Experience with containerisation and API-based integrations. Familiarity with AI coding tools such as Claude Code. This is an excellent ...

offers a great blend of challenge and variety, giving you the opportunity to work across new and existing electronic designs, including legacy systems, product improvements and obsolescence projects. Your engineering expertise and problem-solving skills will play an important role in developing, improving and maintaining electronic systems … hardware design, with experience across analogue and digital electronics. Proficiency with electronic design and CAD tools, alongside a strong understanding of electronic components and systems, is essential. Experience working with legacy designs, product improvements or component obsolescence would be advantageous. Experience & Skills Required Proven experience in electronic ...

offers a great blend of challenge and variety, giving you the opportunity to work across new and existing electronic designs, including legacy systems, product improvements and obsolescence projects. Your engineering expertise and problem-solving skills will play an important role in developing, improving and maintaining electronic systems … hardware design, with experience across analogue and digital electronics. Proficiency with electronic design and CAD tools, alongside a strong understanding of electronic components and systems, is essential. Experience working with legacy designs, product improvements or component obsolescence would be advantageous. Experience & Skills Required Proven experience in electronic ...