426 to 450 of 484 Legacy Systems Jobs in the UK

FX Options trading desk to design and build a system that handles large volumes of market data in near real-time. Key Responsibilities: Design and develop scalable, high-performance systems using modern C# .Net (version 9) Build and integrate APIs and microservices to support trading workflows Collaborate closely with FX Options traders to understand business requirements and deliver tailored … solutions Contribute to architectural decisions and establish development standards for a greenfield application Participate in the migration of legacy monolithic systems to microservices (Optional) Support front-end development using ReactJS across related applications Required Experience: Expert-level proficiency in C# with a strong grasp of recent language features and .NET ecosystem Proven experience working with FX Options … trading systems or directly with Options traders Solid understanding of systems integration, API design, and microservices architecture Experience handling large-scale market data in low-latency or real-time environments Hands-on experience converting monolithic applications into microservices Desirable: Exposure to ReactJS or willingness to contribute to front-end development when needed This role offers the chance to More ❯

FX Options trading desk to design and build a system that handles large volumes of market data in near real-time. Key Responsibilities: Design and develop scalable, high-performance systems using modern C# .Net (version 9) Build and integrate APIs and microservices to support trading workflows Collaborate closely with FX Options traders to understand business requirements and deliver tailored … solutions Contribute to architectural decisions and establish development standards for a greenfield application Participate in the migration of legacy monolithic systems to microservices (Optional) Support front-end development using ReactJS across related applications Required Experience: Expert-level proficiency in C# with a strong grasp of recent language features and .NET ecosystem Proven experience working with FX Options … trading systems or directly with Options traders Solid understanding of systems integration, API design, and microservices architecture Experience handling large-scale market data in low-latency or real-time environments Hands-on experience converting monolithic applications into microservices Desirable: Exposure to ReactJS or willingness to contribute to front-end development when needed This role offers the chance to More ❯

Model: 2 days a week ABOUT THE COMPANY/ROLE A leading organisation within the entertainment, media and sport sector is undergoing a major digital transformation to modernise its systems and deliver a more enterprise-wide approach. This role sits within their technology division and focuses on the CRM replacement programme , which aims to improve customer engagement, data insight … and marketing effectiveness across the organisation. ROLE AND RESPONSIBILITIES Define and oversee solution design for CRM and marketing technology platforms Lead the CRM replacement and integration of new systems Liaise with internal stakeholders and external implementation partners Ensure smooth data migration between legacy and new CRM systems Translate business needs into scalable technical solutions SKILLS AND More ❯

Model: 2 days a week ABOUT THE COMPANY/ROLE A leading organisation within the entertainment, media and sport sector is undergoing a major digital transformation to modernise its systems and deliver a more enterprise-wide approach. This role sits within their technology division and focuses on the CRM replacement programme , which aims to improve customer engagement, data insight … and marketing effectiveness across the organisation. ROLE AND RESPONSIBILITIES Define and oversee solution design for CRM and marketing technology platforms Lead the CRM replacement and integration of new systems Liaise with internal stakeholders and external implementation partners Ensure smooth data migration between legacy and new CRM systems Translate business needs into scalable technical solutions SKILLS AND More ❯

to expert for the Housing Management System and other critical applications. Lead on integrations and configuration for specific modules, including leaseholder management, rent setting, and rent analytics. Support additional systems Workforce management, Asset management, Compliance, and Financials. Play a key role in projects such as: Migrating infrastructure to Azure. Decommissioning legacy systems. Implementing MuleSoft for integrations. Expanding More ❯

per hour The client is seeking a Functional Lead to support the delivery of an Oracle Fusion HCM implementation, specifically focusing on reporting, integrations, and data migration from legacy systems. The role involves working closely with SI partners, business SMEs, and IT teams through build, test, and cutover phases. Key responsibilities include managing data cleansing and reconciliation, supporting … quality assurance, testing and user testing support. Provide expertise and support for the data cleansing, data preparation, data mapping and reconciliation for data migration and integrations from non-EBS systems or data sources Identify risks, issues, and dependencies of the Integrations and Data Migration Workstream, mitigate, and manage these as required. Support the upcoming test phases with expertise in … Suite to Oracle Cloud Full lifecycle experience of Oracle HCM Cloud implementations from design, build, test through to deployment Experience in Data Migration from both EBS and from other systems to HCM Cloud from a functional perspective, which would include writing functional specs for DM routines, defining data mappings, and supporting the end-to-end process, including data validation More ❯

the project We are seeking an experienced Lead Java Developer to oversee and deliver a critical Live Services Java Patching Programme within Central Government. This role involves upgrading legacy Java applications to meet contractual and compliance requirements, ensuring continued stability, performance, and security across live environments. The successful candidate will take a leading role in planning, coordinating, and … and quality assurance within the team. Maintain comprehensive documentation and reporting throughout the upgrade lifecycle. Essential Skills and Experience: Proven expertise in Java development, including upgrading and maintaining legacy systems. Strong understanding of live service environments and production change management. Demonstrated experience leading or coordinating small technical teams. Excellent communication, analytical, and stakeholder engagement skills. Active Security Check More ❯

scale ERP transformation to unify our clients finance and HR administrative processes. This role encompasses a complex pan Europe programme, replacing our client’s current legacy ERP systems to make HR and finance process as unified as other business areas, post-merger. Key Requirements: Strong hands-on experience working across large scale global ERP programmes (With Oracle More ❯

scale ERP transformation to unify our clients finance and HR administrative processes. This role encompasses a complex pan Europe programme, replacing our client’s current legacy ERP systems to make HR and finance process as unified as other business areas, post-merger. Key Requirements: Strong hands-on experience working across large scale global ERP programmes (With Oracle More ❯

modular, composable architectures. Coordinate UAT and training activities across European offices. Engage with project and business teams to align testing with operational needs. Review legacy and new systems to ensure seamless transition. Facilitate meetings with senior stakeholders. Support defect management in collaboration with third party suppliers. Experience & Skills Strong grasp of complex systems and ability to More ❯

Datapower Developer , you will be working closely with the technical team on development and implementation journeys. The role is centered on enabling and securing data flows between various enterprise systems, including mobile applications, cloud services, and legacy mainframe systems click apply for full job details More ❯

Your new company and role Hays' client is a major Glasgow-based organisation in the higher education sector. The Systems Analyst will support the implementation of a brand-new system for the end-client. This role will ensure that administration processes are effectively captured and translated into system functionality, supporting the organisation's strategy. Key Responsibilities: Process Mapping & Requirements … Configuration & Testing: Support the configuration and lead testing efforts to ensure system functionality aligns with user needs. Data Migration: Assist in the migration and validation of data from legacy systems. Stakeholder Engagement: Facilitate communication between stakeholders, IT teams, and 3rd parties. Training & Support: Develop training … materials and provide user support during and after implementation. Continuous Improvement: Identify opportunities for process improvement and system enhancements post-implementation. What you'll need to succeed Experience with systems implementation Strong analytical and documentation skills Excellent stakeholder engagement and communication Understanding of relevant administration processes Ability to manage multiple tasks and meet deadlines What you need to do More ❯

Datapower Developer , you will be working closely with the technical team on development and implementation journeys. The role is centered on enabling and securing data flows between various enterprise systems, including mobile applications, cloud services, and legacy mainframe systems. Your Responsibilities: Provide expert support and timely resolution of environmental issues related to the project, focusing on DataPower … to Python, Shell scripting, GitLab pipeline. Your Profile Essential Skills/Knowledge/Experience: Proven experience in IBM DataPower development, configuration, and troubleshooting within enterprise environments. Familiarity with mainframe systems and integration with DataPower where applicable. Good working knowledge of AWS services, particularly CloudWatch, DynamoDB, and Lambda, including monitoring, troubleshooting, and optimisation. Excellent verbal and written communication skills to More ❯

thrive and contribute their unique perspectives. Job Purpose: To provide onsite support for the in-service management of Operational Technology (OT) and ensure cyber security compliance of Plant Computing Systems (PCS) and Technical Support Computing Systems (TSCS) at Heysham 1. The role supports technical governance and cyber security policies, contributing to safe and secure station operations. Key Responsibilities … Experience with ICS, SCADA, PLCs, HMIs, and industrial protocols (Modbus, OPC, HART). Understanding of network security principles and DMZ architecture. Familiarity with legacy and modern computing systems and storage media. Strong attention to detail, record keeping, and communication skills. Ability to mentor and train new engineers, supporting long-term knowledge and skills retention. Appreciation of both … modern and legacy computer systems. Ability to build effective relationships with system owners and clearly communicate technical security concepts in simpler terms. Training Must complete site induction and Asset Guardian training. Must complete all qualification and training required for unescorted access to site. Additional Requirements: Must live within 60 minutes of Heysham 1. Full UK driving licence required. More ❯

The Company At LabLogic Systems Ltd, we're pioneers in the Life Science, PET/Nuclear Medicine, and Radiation Safety sectors. We're committed to excellence, delivering high-quality products and service while fostering a positive work culture grounded in our core values: Passionate and driven, Everyone is accountable, Respectful and inclusive, Family atmosphere, Efficient, Customer-focused, and Trustworthy. … accreditation, affirming our commitment to creating an exceptional workplace. Join us in a collaborative, supportive team, where benefits like our annual Center Parcs trip foster positive working relationships. LabLogic Systems Ltd is not just a workplace; it's a rewarding journey in a globally acclaimed organisation. The Product LabLogic provides two specialist radiopharmacy Laboratory Information Management Systems (LIMS … day one, both inside and outside of development. We are looking for somebody with a proactive, solution-oriented mindset who can contribute to both new system development and legacy system enhancements, with a demonstrated ability to identify and implement improvements in team processes and procedures. Outside of development there is opportunity to coordinate with our Sales and QA More ❯

Full Stack Developer – Hybrid - London Do you love building both front-end and back-end systems? Are you comfortable switching between React components and Python? Have you worked in Cloud platforms (GCP, AWS, or Azure) ? Do you want to work on data-heavy, cloud-native microservices and modern web apps? If that sounds like you — keep reading About the … a successful Public Affairs company are looking for a Mid-Level Software Engineer to join their talented engineering team to work on a mix of greenfield development and legacy systems. You’ll get to make an impact from day one shaping architecture and writing clean code. What You’ll Do: You’ll rebuild a legacy user More ❯

Full Stack Developer – Hybrid - London Do you love building both front-end and back-end systems? Are you comfortable switching between React components and Python? Have you worked in Cloud platforms (GCP, AWS, or Azure) ? Do you want to work on data-heavy, cloud-native microservices and modern web apps? If that sounds like you — keep reading About the … a successful Public Affairs company are looking for a Mid-Level Software Engineer to join their talented engineering team to work on a mix of greenfield development and legacy systems. You’ll get to make an impact from day one shaping architecture and writing clean code. What You’ll Do: You’ll rebuild a legacy user More ❯

Engineering Manager (SEM) and working closely with product engineering squads and platform teams. The role is Node.js-heavy and initially focused on authentication: completing our migration from a legacy auth system to Auth0, moving M2M clients to Private Key JWT (with client-credentials fallback where needed), and automating customer onboarding (keys/JWKs and SSO enablement). It … the easiest path - through guardrails, self-service tooling, and CI/CD enablement. We're a collaborative, remote-first group with clear objectives: land the Auth0 rollout, deprecate legacy auth safely, and introduce scope-based, fine-grained access controls across our API and UI. You'll help us deliver these programmes while strengthening our platform security posture and … therapy via Wellness Cloud, mental health support via Headspace Strong financial wellbeing focus including access to Octopus Money, Octopus Share Incentive Plan and will writing offering via Octopus Legacy Perkbox - Flexi-points giving you a range of discounts and perks including free weekly coffee, gym and retail discounts Access to initiatives like Cycle to Work and Octopus Electric More ❯

Engineering Manager (SEM) and working closely with product engineering squads and platform teams. The role is Node.js-heavy and initially focused on authentication: completing our migration from a legacy auth system to Auth0, moving M2M clients to Private Key JWT (with client-credentials fallback where needed), and automating customer onboarding (keys/JWKs and SSO enablement). It … the easiest path - through guardrails, self-service tooling, and CI/CD enablement. We're a collaborative, remote-first group with clear objectives: land the Auth0 rollout, deprecate legacy auth safely, and introduce scope-based, fine-grained access controls across our API and UI. You'll help us deliver these programmes while strengthening our platform security posture and … therapy via Wellness Cloud, mental health support via Headspace Strong financial wellbeing focus including access to Octopus Money, Octopus Share Incentive Plan and will writing offering via Octopus Legacy Perkbox - Flexi-points giving you a range of discounts and perks including free weekly coffee, gym and retail discounts Access to initiatives like Cycle to Work and Octopus Electric More ❯

Engineering Manager (SEM) and working closely with product engineering squads and platform teams. The role is Node.js-heavy and initially focused on authentication: completing our migration from a legacy auth system to Auth0, moving M2M clients to Private Key JWT (with client-credentials fallback where needed), and automating customer onboarding (keys/JWKs and SSO enablement). It … the easiest path - through guardrails, self-service tooling, and CI/CD enablement. We're a collaborative, remote-first group with clear objectives: land the Auth0 rollout, deprecate legacy auth safely, and introduce scope-based, fine-grained access controls across our API and UI. You'll help us deliver these programmes while strengthening our platform security posture and … therapy via Wellness Cloud, mental health support via Headspace Strong financial wellbeing focus including access to Octopus Money, Octopus Share Incentive Plan and will writing offering via Octopus Legacy Perkbox - Flexi-points giving you a range of discounts and perks including free weekly coffee, gym and retail discounts Access to initiatives like Cycle to Work and Octopus Electric More ❯

A Integration team — the people who take newly acquired companies and help turn them into smooth-running parts of the wider group. You’ll take legacy billing systems, unusual revenue recognition methods, inconsistent data, and make them work in a single, clean revenue world. It’s detective-work meets technical accounting.If something doesn’t reconcile... you’ll … find out why.If there’s missing revenue... you’ll uncover it.If the accounting policy doesn’t align... you’ll fix it.No two months look the same.Every acquisition brings different systems, revenue streams and challenges. If you like variety, this is it.This isn’t a repetitive month-end job. There’s ownership, visibility and progression built in. The last person … until the numbers make sense. If you want a role that stretches you, builds real commercial experience, gives you variety and opens doors in M&A, commercial finance or systems — this is a brilliant move. Offering £60,000 to £65,000 top end with industry exp + 10% bonus + Private Medical + 25 Days Holiday + Bank Holidays More ❯

with a leading organisation in the industrial technology and energy sector to hire an OT Cyber Security Engineer. This role focuses on safeguarding Operational Technology (OT) and Plant Computing Systems (PCS) through robust cyber security practices, compliance management, and continuous improvement. You ll work onsite within a highly regulated environment, supporting system security, risk management, and operational resilience across … critical infrastructure. Key Responsibilities of the OT Cyber Security Engineer: Support configuration control, malware checks, backups, and digital forensic investigations for OT/PCS systems Maintain accurate asset inventories, risk registers, and network diagrams Identify, assess, and manage cyber risks to OT assets Administer and maintain CBSIS documentation, including risk assessments and operating procedures Participate in cyber incident response … industrial protocols such as Modbus, OPC, or HART Strong understanding of network security principles, DMZ architecture, and secure configurations Familiarity with both modern and legacy industrial computing systems Experience with cyber governance, documentation, and compliance frameworks Excellent attention to detail, documentation, and communication skills Ability to build strong relationships across technical and operational teams Full UK driving More ❯

with a leading organisation in the industrial technology and energy sector to hire an OT Cyber Security Engineer. This role focuses on safeguarding Operational Technology (OT) and Plant Computing Systems (PCS) through robust cyber security practices, compliance management, and continuous improvement. You’ll work onsite within a highly regulated environment, supporting system security, risk management, and operational resilience across … critical infrastructure. Key Responsibilities of the OT Cyber Security Engineer: Support configuration control, malware checks, backups, and digital forensic investigations for OT/PCS systems Maintain accurate asset inventories, risk registers, and network diagrams Identify, assess, and manage cyber risks to OT assets Administer and maintain CBSIS documentation, including risk assessments and operating procedures Participate in cyber incident response … industrial protocols such as Modbus, OPC, or HART Strong understanding of network security principles, DMZ architecture, and secure configurations Familiarity with both modern and legacy industrial computing systems Experience with cyber governance, documentation, and compliance frameworks Excellent attention to detail, documentation, and communication skills Ability to build strong relationships across technical and operational teams Full UK driving More ❯

embarking on an exciting project to enhance and automate their royalties processing and reporting. They're implementing Curve, a specialist royalties management platform, and are seeking an experienced Royalties Systems Specialist to join them for a short interim period to help ensure a smooth and successful rollout. Key responsibilities Support the implementation and configuration of the Curve royalties system. … Work closely with internal teams and Curve's support to map, cleanse, and migrate data from legacy systems. Automate data feeds and reporting processes to improve accuracy and efficiency. Conduct testing and validation of data outputs, calculations, and reporting workflows. Troubleshoot and resolve data or process issues during rollout. Create and maintain documentation for new processes and reporting More ❯

made up of approximately 300 members of staff and has an overall budget of approximately £85 million. The goal of this directorate is to ensure that the infrastructure and systems that CPS relies on to function, are maintained and kept in a condition conducive to a successful working environment. Additionally, it is the driving force for digital transformation throughout … in environments with legacy technology and critical operational systems. Experience of driving digital and technology-enabled change in large organisations, including transitioning from legacy technology systems to modern, user-centred systems. A strong ability to influence and collaborate with complex and diverse stakeholder groups to build trust and confidence and deliver programme outcomes. Ensure stakeholder More ❯