76 to 100 of 479 Legacy Systems Jobs in the UK

we are committed to delivering world-class digital experiences for our customers, partners, and stakeholders. Are you a Senior Software Engineer with a passion for building high-performing, scalable systems and solving complex technical challenges? We’re looking for a talented engineer with strong expertise across .NET and SQL Server to join our team during an exciting period of … with a strong focus on SQL, ETL, data pipelines, performance tuning, and system integrations. You’ll play a key role in shaping our future architecture, modernising legacy systems, and driving improvements in quality, performance, and scalability. This is a hands-on engineering role to start, with a clear path to progression into a Tech Lead position -where … DataBricks Implement clean, maintainable code using SOLID principles and design patterns Collaborate with architecture and product teams to deliver high-quality software at pace Refactor and re-platform legacy data centric components into modern, cloud-first services Data Engineering Drive ETL development, data ingestion, and transformation pipelines Improve database performance and optimise slow-running queries across large datasets More ❯

SSRS and SSAS SSIS is very important for this position. Must be an excellent problem solver and adept writing documentation for all projects. You ideally have worked on banking systems particularly Core Banking. Responsible for the development and delivery of new systems to automate and streamline processes required by different departments. To support the internal IT department with … changes and upgrades to software platforms. To be primary contact for all technical questions relating to in-house bespoke systems and interfacing. Analysis of issues pertaining to problems or errors raised by in-house systems, i.e. CORE, SharePoint interface, Equation, Kondor, Eximbills, end of day cycle. Support Supporting budgeting and financial planning processes for Finance department, including loading … Forms with Equation system to introduce automation of processes thereby eliminating the need for duplicate entry. Utilise web services to integrate from cutting edge technology into legacy systems such as Equation. Integrate with all the systems using data abstraction and connectivity layers, i.e. ODBC, ADO.net. ?Duties Maintain knowledge of all applicable regulatory requirements including the Banks More ❯

mission, the Data Migration Specialist role focuses on the planning, execution, and management of data migration projects. Data Migration Specialists are responsible for transferring data from legacy systems to new platforms, ensuring accuracy, consistency, and adherence to data integrity standards. Analyse existing data structures and understand business requirements for data migration. Design and implement robust data migration More ❯

Overview The client is seeking a mid-to-senior level contractor with strong backend and infrastructure development experience. The successful candidate will work on maintaining and upgrading a legacy Java/Oracle system, collaborating with existing developers to gain domain knowledge and contribute to modernisation efforts using cloud-based technologies. Key Responsibilities * Maintain and enhance a monolithic Java … skills and a passion for working with data * Be comfortable working with legacy Oracle PL/SQL code and motivated to improve it * View legacy systems as an opportunity to gain valuable domain knowledge * Embrace 3rd line support responsibilities and seek ways to automate and improve support processes * Be proficient in test-driven development and More ❯

Role OverviewThe client is seeking a mid-to-senior level contractor with strong backend and infrastructure development experience. The successful candidate will work on maintaining and upgrading a legacy Java/Oracle system, collaborating with existing developers to gain domain knowledge and contribute to modernisation efforts using cloud-based technologies. Key Responsibilities* Maintain and enhance a monolithic Java … skills and a passion for working with data* Be comfortable working with legacy Oracle PL/SQL code and motivated to improve it* View legacy systems as an opportunity to gain valuable domain knowledge* Embrace 3rd line support responsibilities and seek ways to automate and improve support processes* Be proficient in test-driven development and More ❯

is partnered with a fast-growing, family-run organisation undergoing a major digital transformation. We’re looking for a hands-on, people-focused Head of IT who can modernise systems, uplift the perception of IT across the business, and lead a small but capable technology team through an exciting period of change. This is a true leadership role for … someone who enjoys being close to the operation, visible to staff, and trusted by the leadership team. You’ll also play a pivotal role in the rollout of new systems, including their Salesforce-based ERP, while shaping an empowered, proactive, high-performing IT culture. Key Responsibilities Lead, mentor, and develop a team across support, development, cybersecurity, and programme delivery … Modernise and stabilise legacy systems and lead the transition to a future-fit IT landscape Manage infrastructure, networking, cybersecurity, and system resilience across a multi-site operation Drive a positive IT reputation by building strong relationships with stakeholders at all levels Oversee ERP and core business systems, including integrations and ongoing transformation projects Own IT vendor More ❯

aligns with corporate governance, MoD/Defence standards, and project timelines, delivering best value while mitigating commercial and contractual risks. Key Responsibilities: Procurement & Sourcing Lead sourcing activities for IT systems, software, and implementation services to support the ERP replacement programme (Oracle ERP implementation). Develop, issue, and manage RFPs/RFQs, supplier evaluations, and negotiation strategies in line with … the BFS Programme team, IT, and Finance to align procurement deliverables with the ERP transformation roadmap. Support the transition from SAP/Ariba procurement processes to Oracle ERP-based systems and tools. Provide procurement and commercial insight into ERP system configuration, vendor integrations, and licensing models. Support the development of procurement templates, policies, and processes within the new ERP … Defence, Aerospace, or Government). Strong understanding of software procurement, licensing models, and IT implementation services. Experience managing complex ERP or IT transformation procurements (preferably Oracle, SAP, or similar systems). Solid commercial and contractual negotiation skills. Working knowledge of public sector procurement frameworks and Defence Standards (DEFCONs, DSPCR, or equivalent). Ability to work collaboratively across multidisciplinary teams More ❯

that truly believes when you win, we all win, and when you fail, we all learn, then were eager to hear from you. We are looking to expand our Systems and Project Engineering capability in all levels of experience and are keen to hear from you if you feel youre ready to take the next step in your career. … You must be a Sole UK National and qualify for Security Clearance. Job Description The Systems Engineer will work together with the customer contributing to requirements management and problem understanding, supporting facilities engineering and major infrastructure projects. This role may include but is not limited to: requirements management , ensure projects are properly scoped and delivered using sound systems … and problem definition are done effectively and collaboratively Support the development of technical documentation including requirement sets, interface definitions, V&V plans and logical architectures. Apply and promote practical systems thinking in support of infrastructure and facilities maintenance projects Compile and peer review project and technical reports. Workload Management - Workload planning, estimating & scheduling, support project coordination if part of More ❯

scalable technology solutions across the Army's digital ecosystem. Working within a multi-disciplinary Defence team, you'll help define and implement solution architectures that modernise legacy systems, establish new digital standards, and ensure systems are interoperable, resilient, and aligned with strategic objectives. The ideal candidate will bring strong Defence or Army experience - particularly an understanding … of command, intelligence, and operational systems - combined with the technical expertise to design solutions that drive real operational advantage. This is a hybrid role and you will be required to work 2 days a week onsite in Andover. Valid SC clearance is essential, and previous MOD/Army experience is highly desirable. Key Responsibilities Lead the definition, design, and … frameworks. Skills & Experience Required Proven experience as a Solution Architect on large-scale, complex transformation programmes. Strong Army or Defence background , ideally with knowledge of command, control, and intelligence systems . Deep understanding of architecture frameworks, design standards and methodologies. Experience with secure software development lifecycles , OWASP , GDPR , and NCSC Cloud Security Principles . Demonstrated ability to design and More ❯

scalable technology solutions across the Army's digital ecosystem. Working within a multi-disciplinary Defence team, you'll help define and implement solution architectures that modernise legacy systems, establish new digital standards, and ensure systems are interoperable, resilient, and aligned with strategic objectives. The ideal candidate will bring strong Defence or Army experience - particularly an understanding … of command, intelligence, and operational systems - combined with the technical expertise to design solutions that drive real operational advantage. This is a hybrid role and you will be required to work 2 days a week onsite in Andover. Valid SC clearance is essential, and previous MOD/Army experience is highly desirable. Key Responsibilities Lead the definition, design, and … frameworks. Skills & Experience Required Proven experience as a Solution Architect on large-scale, complex transformation programmes. Strong Army or Defence background , ideally with knowledge of command, control, and intelligence systems . Deep understanding of architecture frameworks, design standards and methodologies. Experience with secure software development lifecycles , OWASP , GDPR , and NCSC Cloud Security Principles . Demonstrated ability to design and More ❯

Stafford Head Office & Client Sites (Hybrid) Employment Type: Permanent, Full-time Salary: £90,000 – £110,000 (dependent on experience) Why Join DigX? At DigX, you won’t just design systems—you’ll architect the future of enterprise transformation. We’re trusted by FTSE100 enterprises and multi-country organisations to deliver complex Dynamics 365 and Azure solutions that drive genuine … the strategic force behind our Dynamics 365 implementations. You’ll define and govern architecture across complex, multi-country environments, ensuring seamless integration between D365, ISVs, and legacy systems whilst shaping Azure infrastructure, release pipelines, and technology strategy. You’ll tackle genuinely challenging problems—from multi-country D365 Finance & Operations rollouts to intricate manufacturing integrations—collaborating with business … ll Do Design and maintain enterprise-level architecture for Dynamics 365 Finance & Operations, ensuring alignment with business strategy and technical excellence Define integration patterns between D365, ISVs, and legacy applications using APIs, middleware, and Azure services Establish Azure tenant structures, subscription models, environments, and security frameworks that support scalable operations Design and implement CI/CD pipelines for More ❯

Developer Purpose of the Role To provide versatile software development expertise across a range of technologies, supporting both legacy systems and new applications as part of a major transformation programme Key Responsibilities Design & Development Work with legacy technologies during the transition to a modernised platform. Support the adoption of new low-code/no-code … Software Delivery Lifecycle (SDLC). Experience in software design, TDD/unit testing, and DevOps pipelines. Computing-related degree or equivalent practical experience. Experience with financial, banking, or accounting systems is desirable. More ❯

challenging and exciting environments with our major clients in Global Media, Banking, Government, Telecoms & Utilities. The role Responsible for the design, development, implementation, and troubleshooting of audio and video systems and infrastructure, focusing on both legacy and cloud-based solutions Key responsibilities • Install, test, analyse, troubleshoot and modify new Audio & Video processing equipment/solutions to achieve … driving improved technical and service performance. • Design and drive processes to facilitate smooth and seamless deployment of new Audio & Video processing services. • Design, develop, and implement Audio & Video processing systems and solutions for broadcast and satellite communications, ensuring compliance with industry standards and regulatory requirements. • Supervise the delivery of 3rd party suppliers and contractors to ensure that delivery specifications … sharing knowledge and skills and providing mentoring support to engineers and technicians. • Act as an escalation point for troubleshooting from junior engineers. • Support integration projects for legacy systems and cloud-based solutions Core skills, knowledge and experience required Audio and video processing - Understanding of audio and video processing principles Virtualisation & Cloud Computing – proficiency with virtualisation and cloud More ❯

challenging and exciting environments with our major clients in Global Media, Banking, Government, Telecoms & Utilities. The role Responsible for the design, development, implementation, and troubleshooting of audio and video systems and infrastructure, focusing on both legacy and cloud-based solutions Key responsibilities • Install, test, analyse, troubleshoot and modify new Audio & Video processing equipment/solutions to achieve … driving improved technical and service performance. • Design and drive processes to facilitate smooth and seamless deployment of new Audio & Video processing services. • Design, develop, and implement Audio & Video processing systems and solutions for broadcast and satellite communications, ensuring compliance with industry standards and regulatory requirements. • Supervise the delivery of 3rd party suppliers and contractors to ensure that delivery specifications … sharing knowledge and skills and providing mentoring support to engineers and technicians. • Act as an escalation point for troubleshooting from junior engineers. • Support integration projects for legacy systems and cloud-based solutions Core skills, knowledge and experience required Audio and video processing - Understanding of audio and video processing principles Virtualisation & Cloud Computing – proficiency with virtualisation and cloud More ❯

the business, true to the founding values of quality, simplicity and collaboration. We’re looking for a Lead Engineer to join a major transformation programme modernising and consolidating legacy systems. This role will suit someone with deep technical expertise and a hands-on leadership … style - someone who takes pride in engineering excellence, clear communication, and delivering measurable value. Key Requirements (Must Have): Deep Laravel/PHP expertise, including experience upgrading legacy systems (Laravel 4 → 10–12, PHP 5 → 8) Strong Cloud & DevOps experience - Ideally Azure Front-end competence with Vue or React Strong SQL knowledge and API integration experience Proven ability … to lead engineers and uphold quality standards Experience modernising and consolidating legacy platforms Excellent communication and stakeholder management skills Nice to Have: Familiarity with .NET Core/C# WordPress migration or plugin experience Exposure to Docker/Kubernetes Experience managing offshore or burst resources Understanding of micro-frontend or composable architecture Awareness of security and secrets management best More ❯

As the Enterprise Security Architect, you’ll own the definition and implementation of enterprise-wide security architecture. You’ll be responsible for designing strategies and frameworks that secure critical systems and services, spanning both on-premise and cloud environments. You’ll also play a hands-on leadership role in mentoring solution and technical architects, ensuring security is a foundational … business and technology strategies into security-focused architecture patterns Design and maintain conceptual and logical security architectures across multiple technology domains Support secure delivery of cloud and on-premise systems (Oracle, Microsoft, Salesforce, MuleSoft) Guide solution and technical architects on security principles, best practices, and assurance Contribute to architecture governance, standards, and documentation Partner with product, digital, data, finance … an Enterprise or Security Architect in complex environments Strong understanding of enterprise security frameworks, governance, and risk management Experience delivering secure architectures in cloud, hybrid, and legacy systems Hands-on knowledge of modelling tools and frameworks (UML, ArchiMate, Bizz design ideal) Broad technical knowledge across infrastructure, data, CRM, HR, and finance systems Strong communication and stakeholder More ❯

As the Enterprise Security Architect, you’ll own the definition and implementation of enterprise-wide security architecture. You’ll be responsible for designing strategies and frameworks that secure critical systems and services, spanning both on-premise and cloud environments. You’ll also play a hands-on leadership role in mentoring solution and technical architects, ensuring security is a foundational … business and technology strategies into security-focused architecture patterns Design and maintain conceptual and logical security architectures across multiple technology domains Support secure delivery of cloud and on-premise systems (Oracle, Microsoft, Salesforce, MuleSoft) Guide solution and technical architects on security principles, best practices, and assurance Contribute to architecture governance, standards, and documentation Partner with product, digital, data, finance … an Enterprise or Security Architect in complex environments Strong understanding of enterprise security frameworks, governance, and risk management Experience delivering secure architectures in cloud, hybrid, and legacy systems Hands-on knowledge of modelling tools and frameworks (UML, ArchiMate, Bizz design ideal) Broad technical knowledge across infrastructure, data, CRM, HR, and finance systems Strong communication and stakeholder More ❯

ownership of a specific platform domain with product leadership of our wider platform transformation. In your vertical, you’ll work closely with a squad to rebuild and evolve critical systems (for example, order generation), ensuring they’re robust, scalable, and deliver clear business and customer outcomes. At the same time, you’ll play a pivotal cross-cutting role in … ensuring transformation initiatives balance technical progress with visible customer and commercial value. This role would suit a PM who thrives on complexity, enjoys connecting the dots across teams and systems, and has the communication skills to simplify technical change for diverse stakeholders. It’s not about being the most technical person in the room – it’s about being a … systems thinker, a clear communicator, and a leader who can bring others on the journey. You will be responsible for: This role combines ownership of a core platform domain with leadership of our cross-cutting platform transformation. You'll guide a squad delivering resilient systems that power customer experiences while shaping and driving the transformation roadmap. Shape and More ❯

transformation projects, and helping shape the future of data infrastructure. The Role You'll be responsible for the day-to-day management of SQL Server and Azure-based data systems, supporting ETL processes, and driving improvements across data platforms. This is a great opportunity for someone who enjoys solving problems, improving systems, and working collaboratively across teams. Key … Responsibilities Maintain and manage SQL Server and Azure data environments Ensure data system security, patching, and performance tuning Support ETL services and data operations Analyse and remediate legacy data structures Contribute to transformation and change initiatives Identify opportunities to improve data processes and suggest solutions Produce high-quality technical documentation Investigate and resolve issues, including root cause analysis … stored procedure and function development Familiarity with Azure SQL, Azure Analytics, Dataverse or similar (or willingness to learn) Strong analytical skills and ability to reverse-engineer legacy systems Excellent documentation and stakeholder communication skills A proactive, collaborative mindset with a passion for continuous improvement Core Competencies Clear and respectful communicator Open-minded and adaptable to change Self More ❯

environment. What You’ll Be Doing: As a Senior Data Engineer, you’ll take a hands-on role in building and optimising data services across both modern and legacy platforms. Key responsibilities include: Developing, maintaining, and optimising data pipelines and ELT processes using Microsoft Fabric, Azure Data Factory, Synapse, Purview … and Power BI. Designing and implementing scalable and reliable data platform solutions aligned with the organisation’s data strategy. Supporting the migration of critical datasets from legacy systems to the new cloud platform, ensuring high data integrity and minimal disruption. Collaborating with internal stakeholders across IT, Digital, and Data Strategy teams to understand business requirements and translate More ❯

for an experienced and pragmatic Engineering Manager to build and lead a team of software engineers in delivering high-quality, scalable, and integrated solutions. This role combines technical leadership, systems thinking, and people management, with a strong focus on interoperability between built and bought systems, data protection, and sustainable delivery. Key Responsibilities: Lead, mentor, and support a cross … functional team of engineers, fostering a high-performance and inclusive engineering culture. Provide architectural oversight across the systems the team owns, ensuring scalable, secure, and maintainable solutions aligned with business objectives. Review and guide the non-functional requirements (e.g. performance, security, reliability, scalability) and integration capabilities of third-party systems, ensuring they meet enterprise and operational standards. Oversee … stack (.NET, C#, Azure) as well as experience with modern JavaScript/TypeScript frameworks (e.g. Node.js, React). Solid experience in evaluating, integrating, and managing third-party or SaaS systems within a broader IT estate. Strong understanding of non-functional requirements and architectural principles for distributed, cloud-native systems. Experience building and maintaining robust APIs, data pipelines, and secure More ❯

propose cost-effective, scalable solutions. Identify architectural risks and mitigate them through design and governance. Key Priorities: Align enterprise architecture with strategic business transformation goals. Modernise legacy systems and infrastructure in line with future-state vision. Improve integration and interoperability across platforms and business units. Enable digital transformation, cloud adoption, and data-driven decision-making. Promote reuse More ❯

Senior Software Engineer (Backend) – London, UK | Up to £80,000 | Fully Remote or Hybrid Are you a Senior Software Engineer who ships bulletproof, scalable systems that power millions of customer interactions? Do you live to dismantle legacy monoliths and rebuild with clean, modern, cloud-native architecture? Ready to own the backend transformation of the UK’s fastest … first, on-demand collection service. Backed by aggressive digital investment, we’re building the most secure, flexible, customer-obsessed platform in the industry. Think scale, speed, and zero legacy drag. The Role You’ll report directly to … the Head of Technology & Product and own the entire backend transformation. This is your chance to rebuild a critical national platform from the ground up, replacing legacy systems with a modern, scalable architecture that powers millions of customer interactions every year. You’ll lead a seamless migration with zero downtime, integrate cutting-edge industry solutions, and deliver More ❯

ll do Work directly with aerodynamicists and engineers to uncover real requirements, challenge assumptions, and design solutions that improve workflows and decision-making. Define the architecture across key software systems, ensuring scalability, maintainability, and performance. Prototype ideas quickly, validate with users, and scale the best concepts into production-ready solutions. Modernise and unify legacy systems, reducing … platforms evolve alongside team ambitions. Collaborate across Aerodynamics and Vehicle Performance groups, influencing technology choices and promoting best practices. What you’ll need Extensive experience designing and building software systems in complex, engineering-driven environments. Strong C# programming skills, with experience in .NET Core and ASP.NET. Knowledge of data-centric applications (SQL Server) and structured workflows. Familiarity with frontend … delivery-focused mindset with an interest in clean architecture and software craftsmanship. (Bonus if you’ve worked with Kafka, Azure, or Docker/Kubernetes, or if you’ve built systems in R&D, motorsport, or real-time data environments). Click the ‘Apply’ button to find out more. Don’t worry if your CV isn’t up to date. More ❯

Technical Business Analyst - Insurance Claims Systems Location: Hybrid – London (2 days on-site) Salary: Up to £120,000 + full package Company: Leading InsurTech Industry: Lloyd’s/London Market Insurers About the Company: Join a forward-thinking InsurTech organisation that is transforming the Lloyd’s and London Market insurance landscape. Our client works with leading insurers to deliver … complex claims transformation and implementation programmes, modernising legacy systems and improving operational efficiency across the market. They are now seeking a Technical Business Analyst to join their expanding Claims Systems practice, working at the forefront of digital transformation in insurance. Key Responsibilities: Act as the bridge between business stakeholders and technical teams throughout the claims system … improvement of claims handling processes and system performance. Skills and Experience: Proven experience as a Business Analyst or Technical Business Analyst within the insurance sector. Strong background in claims systems (such as Guidewire, Sequel Claims, Sapiens, or bespoke Lloyd’s Market platforms). Deep understanding of Lloyd’s and London Market processes, data flows, and regulatory requirements. Technical proficiency More ❯