176 to 200 of 473 Legacy Systems Jobs in the UK

IR35 £500.00 - £525.00 Clearance: Active SC Clearance (Must hold Active SC) We are seeking a Lead Operations Engineer to take ownership of day-to-day operations across our legacy technology estate. The role will focus on maintaining service stability, ensuring operational readiness, and leading the response to incidents and outages. The Lead Operations Engineer will play a pivotal … phase by embedding operational standards, improving monitoring and support processes, and enabling knowledge transfer into ongoing service delivery teams. Key Responsibilities: Lead daily operational support of legacy systems, ensuring availability, performance, and resilience. Manage incident, problem, and change activities in line with ITIL and enterprise service standards. Proactively monitor and tune infrastructure, applications, messaging, and scheduling platforms. … ordination, triage and joint working is essential for operational activities. Familiarity with ITIL-aligned service management . Building KT libraries Previous involvement in system migrations, re-platforming, or legacy modernisation programmes highly desirable. Background in high-availability, disaster recovery, and enterprise integration patterns. . More ❯

Job summary The Business Change Specialist is responsible for delivering business change activities that enable internal teams and external stakeholders to adopt and embed changes associated with the Research Systems Programme. The role owns and leads discrete business change deliverables--readiness assessments, stakeholder engagement, adoption interventions, and early-life support--and operates with a high degree of autonomy to … ensure the successful transition from legacy systems to new digital services. This role is part of a fast-paced, iterative programme to build a user-centred digital service and achieve a successful transition from current systems (IRAS, HARP and TOPS). The programme will: connect processes for health and social care research in the UK; make … UK. This directorate is responsible for:-Delivering HRA Approval-Supporting the Confidentiality Advisory Group and advising on the use of confidential patient information without consent-Working to refine the systems and processes researchers need to follow to ensure a swift, robust and simple experience-Providing guidance to applicants-Providing training-Working collaboratively with external partners to improve the research More ❯

Job summary The Business Change Specialist is responsible for delivering business change activities that enable internal teams and external stakeholders to adopt and embed changes associated with the Research Systems Programme. The role owns and leads discrete business change deliverables--readiness assessments, stakeholder engagement, adoption interventions, and early-life support--and operates with a high degree of autonomy to … ensure the successful transition from legacy systems to new digital services. This role is part of a fast-paced, iterative programme to build a user-centred digital service and achieve a successful transition from current systems (IRAS, HARP and TOPS). The programme will: connect processes for health and social care research in the UK; make … UK. This directorate is responsible for:-Delivering HRA Approval-Supporting the Confidentiality Advisory Group and advising on the use of confidential patient information without consent-Working to refine the systems and processes researchers need to follow to ensure a swift, robust and simple experience-Providing guidance to applicants-Providing training-Working collaboratively with external partners to improve the research More ❯

Job summary The Business Change Specialist is responsible for delivering business change activities that enable internal teams and external stakeholders to adopt and embed changes associated with the Research Systems Programme. The role owns and leads discrete business change deliverables--readiness assessments, stakeholder engagement, adoption interventions, and early-life support--and operates with a high degree of autonomy to … ensure the successful transition from legacy systems to new digital services. This role is part of a fast-paced, iterative programme to build a user-centred digital service and achieve a successful transition from current systems (IRAS, HARP and TOPS). The programme will: connect processes for health and social care research in the UK; make … UK. This directorate is responsible for:-Delivering HRA Approval-Supporting the Confidentiality Advisory Group and advising on the use of confidential patient information without consent-Working to refine the systems and processes researchers need to follow to ensure a swift, robust and simple experience-Providing guidance to applicants-Providing training-Working collaboratively with external partners to improve the research More ❯

multiple product teams, ensuring that what we build is reliable, scalable, and impactful. You’ll be the bridge between strategic thinking and pragmatic delivery, helping the engineering teams design systems that move fast without breaking things, and influencing through code, collaboration, and clarity. What you’ll work on: Modernising our platform – lead the complete replacement of our legacy systems with a new, cloud-native architecture in Java & Kotlin on AWS. Next-gen pricing models – design and deliver a cutting-edge AI-driven pricing platform that powers smarter, real-time decisions. New product development – help define and launch innovative fintech products that will shape the next wave of our customer experience. Culture-building – play a key … it matters. You'll have deep expertise in Java (and Kotlin), with a strong track record of building high-scale distributed systems. You’ve led or influenced large-scale systems, ideally in a cloud-first environment (AWS preferred). You think in systems, trade-offs, and impact, balancing long-term vision with incremental, value-driven delivery. You have More ❯

and enjoys leading teams to deliver secure, scalable, and resilient cloud solutions. What You’ll Do You’ll lead the planning, build, and lifecycle management of cloud infrastructure, ensuring systems are robust, secure, and aligned with business objectives. Your work will span across Azure administration, infrastructure design, and technical leadership — while mentoring a talented team and driving operational excellence. … Key responsibilities include: Oversee deployment, configuration, and ongoing maintenance of Azure cloud services. Manage Azure tenancy, security infrastructure, and DR strategies. Support migration of legacy systems to cloud platforms. Maintain SQL database infrastructure (on-prem and cloud). Oversee storage lifecycle management, including SharePoint, OneDrive, and blob storage. Lead and develop a high-performing infrastructure team through More ❯

design and delivery of cutting-edge solutions as part of a major Technical Modernisation Programme . About the Programme This transformation initiative is focused on modernising legacy systems, adopting cloud-native architectures, and enabling scalable, secure, and future-proof technology platforms. You’ll be at the heart of a multi-disciplinary team driving innovation and change across … Define and own end-to-end solution architecture across multiple workstreams Collaborate with delivery teams, stakeholders, and vendors to ensure alignment with business goals Lead the transition from legacy platforms to modern cloud-based ecosystems Ensure architectural governance, security, scalability, and performance standards Provide technical leadership and mentoring to engineering teams Evaluate emerging technologies and recommend strategic adoption More ❯

design and delivery of cutting-edge solutions as part of a major Technical Modernisation Programme . About the Programme This transformation initiative is focused on modernising legacy systems, adopting cloud-native architectures, and enabling scalable, secure, and future-proof technology platforms. You’ll be at the heart of a multi-disciplinary team driving innovation and change across … Define and own end-to-end solution architecture across multiple workstreams Collaborate with delivery teams, stakeholders, and vendors to ensure alignment with business goals Lead the transition from legacy platforms to modern cloud-based ecosystems Ensure architectural governance, security, scalability, and performance standards Provide technical leadership and mentoring to engineering teams Evaluate emerging technologies and recommend strategic adoption More ❯

redesign of business processes to improve efficiency, quality, and organisational alignment. Employing structured methodologies such as Lean or Six Sigma. Recommending the rationalisation or decommissioning of Legacy systems, reporting mechanisms, or processes as appropriate. Plan, organise, and monitor detailed activities and deliverables across workstreams. Assist with scope definition and prioritisation to ensure timely and successful project delivery. … Dependencies (RAID). Facilitate workshops and stakeholder engagement sessions to capture insights and validate proposed solutions. Operate adaptively within evolving project and programme frameworks. Oversee the migration of Legacy files into modern architectures, supporting broader data and digital migration strategies. Evaluate and contribute to the deployment of digital tools, including Power BI and M365. Standardise software delivery practices More ❯

redesign of business processes to improve efficiency, quality, and organisational alignment. Employing structured methodologies such as Lean or Six Sigma. Recommending the rationalisation or decommissioning of legacy systems, reporting mechanisms, or processes as appropriate. Plan, organise, and monitor detailed activities and deliverables across workstreams. Assist with scope definition and prioritisation to ensure timely and successful project delivery. … Dependencies (RAID). Facilitate workshops and stakeholder engagement sessions to capture insights and validate proposed solutions. Operate adaptively within evolving project and programme frameworks. Oversee the migration of legacy files into modern architectures, supporting broader data and digital migration strategies. Evaluate and contribute to the deployment of digital tools, including Power BI and M365. Standardise software delivery practices More ❯

redesign of business processes to improve efficiency, quality, and organisational alignment. Employing structured methodologies such as Lean or Six Sigma. Recommending the rationalisation or decommissioning of legacy systems, reporting mechanisms, or processes as appropriate. Plan, organise, and monitor detailed activities and deliverables across workstreams. Assist with scope definition and prioritisation to ensure timely and successful project delivery. … Dependencies (RAID). Facilitate workshops and stakeholder engagement sessions to capture insights and validate proposed solutions. Operate adaptively within evolving project and programme frameworks. Oversee the migration of legacy files into modern architectures, supporting broader data and digital migration strategies. Evaluate and contribute to the deployment of digital tools, including Power BI and M365. Standardise software delivery practices More ❯

redesign of business processes to improve efficiency, quality, and organisational alignment Employing structured methodologies such as Lean or Six Sigma. Recommending the rationalisation or decommissioning of legacy systems, reporting mechanisms, or processes as appropriate. Plan, organise, and monitor detailed activities and deliverables across workstreams. Assist with scope definition and prioritisation to ensure timely and successful project delivery. … Dependencies (RAID). Facilitate workshops and stakeholder engagement sessions to capture insights and validate proposed solutions. Operate adaptively within evolving project and programme frameworks. Oversee the migration of legacy files into modern architectures, supporting broader data and digital migration strategies. Evaluate and contribute to the deployment of digital tools, including Power BI and M365. Standardise software delivery practices More ❯

oversee the rollout of Syspro across its UK operations. This is a pivotal role in driving system transformation and operational efficiency as the business transitions from legacy systems (Sage and Microsoft AX) to Syspro. ERP/MRP Project Manager Minworth – Travel to other sites required Outside IR35 contract, up to £700 per day dependent on experience … the Syspro ERP system Deliver in-depth training to staff across departments, ensuring effective adoption Coordinate and manage project phases, timelines, and stakeholder engagement Support the transition from existing systems (Sage and AX) to Syspro Collaborate with teams in operations, warehousing, and finance Travel regularly to key sites during the rollout Key Skills and Experience: Demonstrable experience with Syspro More ❯

Design and implement robust solutions, coordinating User Acceptance Testing (UAT) with business stakeholders. Develop responsive web applications using GSS, Java, and open-source technologies. Integrate GE Smallworld with external systems via REST APIs using GSS. Data Management Design and manage data update services for external integrations. Oversee data migration activities from legacy systems to Smallworld, ensuring … of Smallworld 5.x architecture, Mobile Enterprise Suite, and Azure Kubernetes Services (AKS). Proficiency in GSS, JavaScript, and HTML5 for mobile and web development. Experience in integrating with enterprise systems such as IBM Maximo. Desirable Skills/Knowledge/Experience (as applicable): Strong communication and interpersonal skills. Customer-facing experience. Willingness to travel and ability to collaborate effectively with More ❯

a Senior Software Engineer to lead the technical rebuild of its flagship product. This is a hands-on role for an experienced engineer who loves modernising legacy systems and is excited about using AI tools to accelerate design, refactoring, and delivery . You’ll be the technical driver behind a full product transformation, rebuilding a complex ERP … per annum (flexible for exceptional candidates) Location: Hybrid – London office once per fortnight, remote within the UK What you’ll be doing: Lead the refactor of a large legacy system into a modern, scalable cloud-native product Design and implement new architecture using AWS microservices, PostgreSQL, Node.js, React, and TypeScript Use AI-assisted tools such as OpenAI, LangChain More ❯

a Senior Software Engineer to lead the technical rebuild of its flagship product. This is a hands-on role for an experienced engineer who loves modernising legacy systems and is excited about using AI tools to accelerate design, refactoring, and delivery . You’ll be the technical driver behind a full product transformation, rebuilding a complex ERP … per annum (flexible for exceptional candidates) Location: Hybrid – London office once per fortnight, remote within the UK What you’ll be doing: Lead the refactor of a large legacy system into a modern, scalable cloud-native product Design and implement new architecture using AWS microservices, PostgreSQL, Node.js, React, and TypeScript Use AI-assisted tools such as OpenAI, LangChain More ❯

environment. Produce API documentation that adheres to OpenAPI 3.x standards. Lead and mentor a small, focused development team, promoting collaboration, code quality, and technical excellence. Modernise legacy systems and drive the development of next-generation, cloud-native solutions aligned with architectural best practices. Champion DevOps, CI/CD, and automation to ensure fast, reliable, and secure releases. … to play a key role in defining the technical direction of a global platform, combining architecture, leadership, and deep engineering capability. If you thrive on building robust, cloud-native systems, leading high-performing teams, and solving complex challenges at scale, this role offers the opportunity to make a genuine impact within a world-class organisation. More ❯

company where your decisions directly influence performance, reliability, and innovation across platforms used by millions. You'll be at the heart of a mission to modernise legacy systems, accelerate delivery, and empower developers with world-class tooling. ?? What You'll Be Doing As a Senior Infrastructure Engineer , you'll: Architect and manage Azure infrastructure using Infrastructure as … AppDynamics) Deep knowledge of profiling, benchmarking, and optimisation Bonus Skills: Infrastructure as Code (ARM, Bicep, Terraform) Cloud networking (VNets, firewalls, load balancers) SQL Server performance tuning Experience modernising legacy apps in Azure ?? Why You'll Love Working Here Remote-First Culture - Work from anywhere in the UK Flexible Hours - Fit work around your life Career Growth - Dedicated training More ❯

company where your decisions directly influence performance, reliability, and innovation across platforms used by millions. You'll be at the heart of a mission to modernise legacy systems, accelerate delivery, and empower developers with world-class tooling. What You'll Be Doing As a Senior Infrastructure Engineer , you'll: Architect and manage Azure infrastructure using Infrastructure as … AppDynamics) Deep knowledge of profiling, benchmarking, and optimisation Bonus Skills: Infrastructure as Code (ARM, Bicep, Terraform) Cloud networking (VNets, firewalls, load balancers) SQL Server performance tuning Experience modernising legacy apps in Azure Why You'll Love Working Here Remote-First Culture - Work from anywhere in the UK Flexible Hours - Fit work around your life Career Growth - Dedicated training More ❯

stay up-to-date with new technologies Excellent communication and problem-solving skills Beneficial experience: Leading small development teams to deliver functionality on time Migrating large legacy systems Azure Pipelines, MSBuild, ASP.NET MVC, WCF Services WinForms/WPF Web accessibility, responsive web applications, localisation for global markets Responsibilities for Software Developer: Develop features across the full stack … our website). Keywords: Software Developer/Full Stack Developer/C# Developer/.NET Developer/Application Developer/Web Developer/Backend Developer/Frontend Developer/Systems Developer/API Engineer/C#/.NET/SQL Server/Angular/HTML/CSS/TypeScript/Web API/Azure/ASP.NET MVC/WinForms More ❯

Functional Tester We’re working with a global financial technology group undergoing a major transformation to modernise its post-trade infrastructure. The organisation is transitioning from legacy systems to a cloud-native, Kafka-based architecture designed for resilience, scalability, and performance. You’ll be part of a growing Non-Functional Testing (NFT) team responsible for ensuring that … ability to influence across technical and business teams. Experience working in Agile delivery environments with cross-functional teams. Nice to Have Background in financial services or experience supporting legacy-to-modernisation migrations. Understanding of infrastructure observability, cloud platforms, and microservice orchestration. Exposure to automation frameworks and scripting for performance testing. This is a key role within a global More ❯

Functional Tester We’re working with a global financial technology group undergoing a major transformation to modernise its post-trade infrastructure. The organisation is transitioning from legacy systems to a cloud-native, Kafka-based architecture designed for resilience, scalability, and performance. You’ll be part of a growing Non-Functional Testing (NFT) team responsible for ensuring that … ability to influence across technical and business teams. Experience working in Agile delivery environments with cross-functional teams. Nice to Have Background in financial services or experience supporting legacy-to-modernisation migrations. Understanding of infrastructure observability, cloud platforms, and microservice orchestration. Exposure to automation frameworks and scripting for performance testing. This is a key role within a global More ❯

of developers, driving technical excellence and innovation across our software platforms. You'll lead the end-to-end software development lifecycle - from project planning through to deployment - ensuring our systems are robust, scalable, and built to the highest quality standards. Working in an Agile environment, you'll help shape the team's technical direction and development practices while fostering … experience using GIT and version control. Familiarity with Azure Functions, Razor Views, and environments such as VM/IIS and private cloud hosting. Proven experience modernising legacy systems and implementing integrated third-party solutions. Experience with SQL Server/MySQL, API development (RESTful, JSON/XML), and DevOps practices including CI/CD pipelines. Background in Retail More ❯

house ERP system — a mature, Python-based platform central to their operations. The Role: The role involves a mix of feature development, code improvement, and modernisation of existing legacy components within an established Python-based ecosystem. Primary Responsibilities: Develop new features and modules for the bespoke ERP system. Maintain, refactor, and improve legacy Python code while … front-end web technologies - HTML, CSS, JavaScript (including Bootstrap and jQuery). Proficiency with Git for version control and collaborative workflows. Ability to understand and improve legacy systems while developing new features. Strong analytical and problem-solving skills, with a pragmatic approach to balancing improvement with delivery. Advantageous: Linux server administration and housekeeping – including configuration, system maintenance More ❯

are currently seeking a skilled and proactive Mainframe Assembler Developer to join a leading financial institution. You will play a key role in supporting and enhancing legacy systems critical to banking operations. The ideal candidate will have strong technical expertise in Assembler and related mainframe technologies, combined with solid experience in high-volume, regulated environments. Role Overview More ❯