1 to 25 of 266 Legacy Systems Jobs in the UK

engineering performance across delivery, quality and technical standards, while helping shape the next phase of platform evolution. This includes modernising legacy systems, driving adoption of modern technologies and embedding AI-led efficiencies into both internal engineering workflows and customer-facing products. The Role Reporting directly … high-performing engineering function across multiple disciplines Own engineering delivery, release quality and technical execution Drive platform modernisation and migration from legacy systems to modern architectures Build scalable, modular, service-oriented systems and technical standards Oversee DevOps, infrastructure reliability, monitoring and release processes Foster strong collaboration ...

critical software used by hundreds of thousands of users every day. Their platform is undergoing a major transformation, moving away from legacy systems towards a modern, API first architecture designed for scalability, performance, and long term maintainability. They are now looking for an experienced Tech Lead … systems. What you’ll be doing Owning the technical direction and architecture of an API driven platform Leading the migration from legacy systems to modern backend services Defining standards for API design, versioning, security, and documentation Writing high quality production code and leading by example Line managing ...

scale financial data platform. You'll be working with the technology team, supporting a core platform modernisation initiative. Our environment combines long-established enterprise systems and legacy components with modern cloud-based services running on AWS. The platform processes high-volume structured financial data and underpins both … internal systems and customer-facing products. A substantial portion of the platform is built on large SQL Server data estates, making strong SQL expertise non-negotiable. You will play a key role in modernising core systems, improving performance and reliability, and delivering scalable services for the next generation ...

Business Systems and Application Engineer Permanent Milton Keynes Hybrid working Were supporting a leading SME engineering organisation that specialises in complex, high value electromechanical systems for naval and defence platforms. Theyre looking to appoint a driven Business Systems and Application Engineer to help drive digital transformation … operational efficiency across the business. Key Responsibilities Own and manage core business systems and integrations Build Power Apps for data capture and operational workflows Automate processes using Power Automate Develop Power BI dashboards, reports and KPI displays Integrate data across multiple systems (SQL, SharePoint, Dataverse, APIs, legacy ...

requests, and system improvement work ABOUT THE CLIENT We're working with an established and growing technology-driven organisation that specialises in data-led systems and analytics solutions. Due to continued demand and internal growth, they're looking to bring in an experienced Application Support Engineer to support … 12pm -8pm shifts due to US based clients. THE BENEFITS * Hybrid working model with flexibility * Opportunity to work on complex, data-driven systems * Exposure to both modern and legacy environments * Strong focus on autonomy and problem-solving * Collaborative environment with opportunities to influence system improvements ...

suited to someone who enjoys owning delivery, leading projects, and working closely with stakeholders. While there is some responsibility for supporting legacy systems, the focus of the role is firmly on the future - building, shaping, and delivering data pipelines into GCP and BigQuery. You'll be part … working on: Designing, building, and maintaining data pipelines feeding GCP and BigQuery Supporting the transition from legacy SQL-based systems into cloud-native architectures Day-to-day Python development within a modern cloud environment Delivering and leading data engineering projects end-to-end - from scoping through ...

live trading. This is not a greenfield role. Success comes from adding value immediately within a large, demanding codebase — understanding existing Java and .NET systems well enough to reason about trade-offs, guide refactoring or selective rewrites, and make sound architectural decisions under pressure. The roadmap you produce … themselves. A strong candidate will actively embrace agentic AI tooling as a force multiplier — not just to accelerate development, but to rapidly comprehend unfamiliar systems, trace behaviour across services, uncover hidden dependencies, and validate architectural thinking. Combined with deep equities domain knowledge and experience building large-scale distributed systems ...

.We ENABLE hybrid cloud transformation – You will implement modern hybrid data architectures (e.g. Snowflake, Redshift, BigQuery) and drive the migration of legacy systems to cloud-native solutions that unlock agility and performance.We INNOVATE with AI-driven data solutions – You will create Proof of Concepts and Minimum Viable … understanding of ETL/ELT processes and modern architecture patterns such as Data Mesh and Data Fabric.* Migration & Transformation: Experience migrating legacy systems to cloud-native data stores.* Consulting & Commercial Acumen – Strong background in advisory roles, project scoping, budgeting and managing complex stakeholder relationships.* SC Cleared/ ...

leadership within the technology team and a number of upcoming projects, this is a great time to join a business investing in its systems and digital capabilities. Full Stack Developer Hampshire | Hybrid Working | £45,000 – £50,000 You’ll be working as part of a collaborative development team , helping … C# and .NET Designing and building RESTful APIs that support internal and external services Contributing to new greenfield projects , as well as improving existing systems Supporting the modernisation of legacy applications Working with cloud-based infrastructure in Microsoft Azure Collaborating with developers, product stakeholders, and support teams ...

many more fantastic benefits! Join the Applications team driving the Guidewire Cloud rollout across Europe. You'll design, develop, and maintain legacy systems using Guidewire and other technologies, delivering high-quality solutions within a cross-functional team. This role requires strong technical and problem-solving skills, with … ClaimCentre, PolicyCentre, BillingCentre) configuration and customisation Experience with Guidewire Cloud migration Strong understanding of general insurance and claims processes Proven integration experience with downstream systems, including finance, payment gateways, telephony, and document management Skilled in integrating third-party data feeds into cloud platforms Experience migrating data from legacy ...

Title: Systems Developer ( .NET – Billing Systems) Location: Remote (UK) – Office based in North Yorkshire Salary: Up to £40,000 About the Role A well-established UK-based telecommunications services business is seeking a Systems Developer to join its development team. This role is focused on the support … enhancement, and modernisation of enterprise-level billing systems that process large volumes of critical data. The successful candidate will help ensure existing billing processes run accurately and efficiently, while also contributing to the development of modern, automated systems designed to reduce manual intervention and improve reliability. This position ...

hub. This role is designed for a technical visionary capable of navigating large-scale enterprise environments while leading the transition from legacy systems to cloud-native, microservices-based architectures. As a Lead, you will bridge the gap between complex requirements and technical execution, taking direct responsibility … offshore development team of 20+ members, ensuring delivery excellence and code quality. Cloud Transformation: Lead the transition of hosting platforms from legacy systems to Kubernetes-based environments on GCP or AWS. Full-Stack Delivery: Architect and maintain robust, scalable applications using Java 17+ and Angular . Data ...

date architecture repository and system inventory. Define and Manage Local Architecture: As-Is Architecture: Capture the current state of the country's systems and dependencies. Maintain and own the architecture repository, system inventory, and integration blueprint for the country. Transition Architecture: Co-develop detailed roadmaps for moving from … legacy systems to global platform/solutions, with a focus on country-specific priorities and dependencies, in close collaboration with the Regional Architect and Global Enterprise Architect, among other stakeholders. Target Architecture: Co-define the target architecture aligning with the regional architect and Global Enterprise Architect ...

play a key part in transforming how the organisation uses data by: Bringing together fragmented data sources (e.g. spreadsheets, legacy systems) Helping centralise data into a more structured and accessible environment Enabling better decision-making through improved data insight and quality Supporting a more proactive, customer-focused … Define: What data is needed Where it should be stored How it should be structured Support the migration of data from legacy systems into modern platforms Work closely with development teams to: Shape dashboards and reporting outputs Ensure they reflect business needs accurately ...

data workstream. Requirement for someone to lead the full data agenda across the programme lifecycle working across legacy systems, Workday, integrations and reporting requirements. Workday Data Lead, key responsibilities: Lead data workstream across full programme lifecycle Define and deliver data strategy - data plan for Workday Financials implementation … Understanding of finance data structures including master data Experience defining and managing data strategies and data plans Previously worked across multiple legacy systems and data sources Overseeing and coordinating technical teams Strong understanding of data quality and data controls Reasonable Adjustments: Respect and equality are core values ...

data workstream. Requirement for someone to lead the full data agenda across the programme lifecycle working across legacy systems, Workday, integrations and reporting requirements. Workday Data Lead, key responsibilities: Lead data workstream across full programme lifecycle Define and deliver data strategy - data plan for Workday Financials implementation … Understanding of finance data structures including master data Experience defining and managing data strategies and data plans Previously worked across multiple legacy systems and data sources Overseeing and coordinating technical teams Strong understanding of data quality and data controls Reasonable Adjustments: Respect and equality are core values ...

Transformation. As part of this programme, they are seeking an Oracle Project Manager to oversee the technical delivery of integrations between legacy systems and Oracle ERP. The Role: We are looking for a tech-savvy Oracle Project Manager to focus on the end-to-end delivery … requires someone who can bring structure, pace, and accountability. Key Responsibilities & Experience: Manage the delivery of inbound and outbound integrations between legacy systems and Oracle ERP (circa 60 integrations and 10 endpoints). Oversee build, testing, release management, and production cutover activities. Lead distributed nearshore and offshore ...

working with an organisation undergoing a major digital transformation, replacing legacy systems and building out a modern tech landscape with Salesforce at the core. What You’ll Be Doing Designing and delivering integration-led solutions across Salesforce and other SaaS platforms Leading on API and system integrations … translate business needs into scalable solutions Getting hands-on to troubleshoot and unblock integration or system issues Supporting the transition from legacy systems into a more modern, cloud-based architecture What They’re Looking For Experience working with Salesforce (ecosystem exposure is key, not necessarily deep specialisation ...

experienced engineer who possesses hands-on LogiInfo web application development expertise and is eager to play a vital role in transforming legacy systems into contemporary solutions. In this role, you will be crucial in understanding the existing application framework and ensuring a successful transition … application development.- Solid understanding of application architecture, backend services, and data management principles.- Proven ability to analyze and document legacy systems effectively.- Excellent communication skills for collaboration across technical and non-technical teams.- Experience with custom-built platforms and modern web stacks is a plus.If ...

experienced engineer who possesses hands-on LogiInfo web application development expertise and is eager to play a vital role in transforming legacy systems into contemporary solutions. In this role, you will be crucial in understanding the existing application framework and ensuring a successful transition … application development.- Solid understanding of application architecture, backend services, and data management principles.- Proven ability to analyze and document legacy systems effectively.- Excellent communication skills for collaboration across technical and non-technical teams.- Experience with custom-built platforms and modern web stacks is a plus.If ...

active role in shaping the next generation of our platform. This is an ideal opportunity for an engineer who enjoys working with complex systems, values clean and maintainable code, and is motivated by meaningful technical challenges. Key Responsibilities Design, build, test, and deliver new features within a desktop-based … grounding in software engineering principles and best practices Experience working within large or complex codebases Demonstrated ability to refactor and improve legacy systems Excellent debugging and problem-solving capabilities Experience with real-time or multi-threaded applications Proficiency in C/C++ and C# Personal Attributes Clear ...

major digital transformation through the implementation of the award winning Nervecentre Electronic Patient Record (EPR) system. This transition from legacy systems to a modern, integrated EPR represents a significant step forward in supporting safe, efficient and high quality patient care across the Trust. The Trust … well established Digital Systems Team responsible for the management, maintenance, development and operational stability of its clinical digital systems. The Digital Systems Support Officer is a key member of this specialist team and will play an important role in supporting the transition to the new EPR, alongside ...

clearly communicated, understood, and consistently applied Design and Innovation Define and maintain architectural patterns across backend services, APIs, data platforms, and front end systems Design scalable, resilient systems for analytics, workflow orchestration, and intelligence features Guide decomposition of legacy systems into well defined services … domains Evaluate technologies and data stores, favoring open standards and long term maintainability Architect distributed systems with focus on reliability, fault tolerance, and scalability Standards & Governance Establish API design standards ensuring consistency, discoverability, and ease of integration Define front end standards prioritizing web platform capabilities, progressive enhancement, and accessibility ...

play a pivotal role. This is a high-impact position where you'll lead the end-to-end migration from legacy billing systems to a modern, scalable platform, while owning the digital billing experience across customer channels. You'll sit at the intersection of product, technology … billing migration strategy and execution Own the migration roadmap, including dependencies, risks, and key milestones Oversee transition from legacy systems with minimal/no customer disruption Ensure pricing integrity, service continuity, and regulatory compliance throughout Proactively resolve product, billing, and integration challenges Digital Product Ownership Own billing ...

play a pivotal role. This is a high-impact position where you'll lead the end-to-end migration from legacy billing systems to a modern, scalable platform , while owning the digital billing experience across customer channels. You'll sit at the intersection of product, technology … billing migration strategy and execution Own the migration roadmap, including dependencies, risks, and key milestones Oversee transition from legacy systems with minimal/no customer disruption Ensure pricing integrity, service continuity, and regulatory compliance throughout Proactively resolve product, billing, and integration challenges Digital Product Ownership Own billing ...