176 to 200 of 240 Legacy Systems Jobs in London

on solving functional and technical issues related to web applications. Provides enterprise technology solution consultation and development. Manages complex integration scenarios and interfaces between on-premise, cloud, and legacy systems. Requirements for the Software Engineer (React) 6+ years of experience in JavaScript, React, Redux, TypeScript, Styled Components, React Testing Library, REST APIs. Demonstrable experience in energy or commodity More ❯

on solving functional and technical issues related to web applications. Provides enterprise technology solution consultation and development. Manages complex integration scenarios and interfaces between on-premise, cloud, and legacy systems. Requirements for the Software Engineer (React) 6+ years of experience in JavaScript, React, Redux, TypeScript, Styled Components, React Testing Library, REST APIs. Demonstrable experience in energy or commodity More ❯

on solving functional and technical issues related to web applications. Provides enterprise technology solution consultation and development. Manages complex integration scenarios and interfaces between on-premise, cloud, and legacy systems. Requirements for the Software Engineer (React) 6+ years of experience in JavaScript, React, Redux, TypeScript, Styled Components, React Testing Library, REST APIs. Demonstrable experience in energy or commodity More ❯

teams to build features that delight users. Are comfortable mentoring others and helping set technical direction for projects. Bonus points if you0ve worked on fintech products or complex transactional systems . Why Join Penfold At Penfold, were on a mission to help everyone save enough to be comfortable in later life . Were tackling one of society biggest challenges … for their future by making pension saving easy, accessible and engaging. Our vision How we help everyone adopt healthy saving habits Weve done away with the legacy systems and processes that old-school providers are built on, starting from scratch with our purpose-built pension platform which: Brings clarity and confidence about pensions Creates a sense of More ❯

. Responsibilities: Design robust integration solutions across commercial, HR, and data platforms within a complex, multi-brand retail environment Lead architectural planning for the decommissioning of legacy systems, ensuring smooth transitions to modern, scalable services Define and document integration standards, including API strategies, event schemas, and interface contracts to enable decoupled, reusable services Implement event-driven architectures … in enterprise system integration, including legacy system transformation and platform modernisation Hands-on experience with integration technologies, including Kafka (or similar event streaming platforms), Java-based backend systems, and service orchestration Strong proficiency in API design (REST/GraphQL), microservices architecture, and middleware solution Deep understanding of data flow, interface management, and end-to-end process mapping More ❯

and ensuring robust governance supports innovation. You’ll bring proven experience establishing and delivering IG frameworks across complex, multi-stakeholder organisations. Early priorities will include replacing legacy systems, strengthening relationships across IT, Legal, Compliance and Information Security, and driving the adoption of modern, practical governance practices. Right now, this is a standalone role, reporting to the Director More ❯

and ensuring robust governance supports innovation. You’ll bring proven experience establishing and delivering IG frameworks across complex, multi-stakeholder organisations. Early priorities will include replacing legacy systems, strengthening relationships across IT, Legal, Compliance and Information Security, and driving the adoption of modern, practical governance practices. Right now, this is a standalone role, reporting to the Director More ❯

and ensuring robust governance supports innovation. You’ll bring proven experience establishing and delivering IG frameworks across complex, multi-stakeholder organisations. Early priorities will include replacing legacy systems, strengthening relationships across IT, Legal, Compliance and Information Security, and driving the adoption of modern, practical governance practices. Right now, this is a standalone role, reporting to the Director More ❯

and ensuring robust governance supports innovation. You’ll bring proven experience establishing and delivering IG frameworks across complex, multi-stakeholder organisations. Early priorities will include replacing legacy systems, strengthening relationships across IT, Legal, Compliance and Information Security, and driving the adoption of modern, practical governance practices. Right now, this is a standalone role, reporting to the Director More ❯

delivering complex IT transformation programmes in large, global organisations. Strong track record of mainframe modernisation , ideally involving BlueAge or similar technologies – very desirable . Experience migrating legacy systems to public cloud environments – desirable . Demonstrated ability to manage multi-vendor delivery models and complex stakeholder landscapes. Experience in the reinsurance or insurance sector , ideally with exposure to More ❯

delivering complex IT transformation programmes in large, global organisations. Strong track record of mainframe modernisation , ideally involving BlueAge or similar technologies – very desirable . Experience migrating legacy systems to public cloud environments – desirable . Demonstrated ability to manage multi-vendor delivery models and complex stakeholder landscapes. Experience in the reinsurance or insurance sector , ideally with exposure to More ❯

experience delivering complex IT transformation programmes in large, global organisations. Strong track record of mainframe modernisation , ideally involving BlueAge or similar technologies – very desirable. Experience migrating legacy systems to public cloud environments – desirable. Demonstrated ability to manage multi-vendor delivery models and complex stakeholder landscapes. Experience in the reinsurance or insurance sector , ideally with exposure to broking More ❯

experience delivering complex IT transformation programmes in large, global organisations. Strong track record of mainframe modernisation , ideally involving BlueAge or similar technologies – very desirable. Experience migrating legacy systems to public cloud environments – desirable. Demonstrated ability to manage multi-vendor delivery models and complex stakeholder landscapes. Experience in the reinsurance or insurance sector , ideally with exposure to broking More ❯

for a major digital transformation programme. This role ensures readiness across business and technical teams, manages governance and stakeholder alignment, and oversees the successful transition from legacy systems to new services. Key Responsibilities Cutover Preparation Drive the development and sign-off of the Cutover Strategy and Cutover Design. Ensure ECC (Enterprise Command Centre) setup is completed and More ❯

for a major digital transformation programme. This role ensures readiness across business and technical teams, manages governance and stakeholder alignment, and oversees the successful transition from legacy systems to new services. Key Responsibilities Cutover Preparation Drive the development and sign-off of the Cutover Strategy and Cutover Design. Ensure ECC (Enterprise Command Centre) setup is completed and More ❯

for a major digital transformation programme. This role ensures readiness across business and technical teams, manages governance and stakeholder alignment, and oversees the successful transition from legacy systems to new services. Key Responsibilities Cutover Preparation Drive the development and sign-off of the Cutover Strategy and Cutover Design. Ensure ECC (Enterprise Command Centre) setup is completed and More ❯

for a major digital transformation programme. This role ensures readiness across business and technical teams, manages governance and stakeholder alignment, and oversees the successful transition from legacy systems to new services. Key Responsibilities Cutover Preparation Drive the development and sign-off of the Cutover Strategy and Cutover Design. Ensure ECC (Enterprise Command Centre) setup is completed and More ❯

level. You'll be supporting a broad range of IT infrastructure, including user management, account administration, mobile device support, networking, cloud services, end-user computing (EUC), and some legacy systems. What We're Looking For: Proven experience in technical support roles. Understanding of virtual desktop environments and cloud services. Experience with Mobile Device Management (MDM). Strong troubleshooting More ❯

level. You’ll be supporting a broad range of IT infrastructure, including user management, account administration, mobile device support, networking, cloud services, end-user computing (EUC), and some legacy systems. What We’re Looking For: Proven experience in technical support roles. Understanding of virtual desktop environments and cloud services. Experience with Mobile Device Management (MDM). Strong troubleshooting More ❯

level. You’ll be supporting a broad range of IT infrastructure, including user management, account administration, mobile device support, networking, cloud services, end-user computing (EUC), and some legacy systems. What We’re Looking For: Proven experience in technical support roles. Understanding of virtual desktop environments and cloud services. Experience with Mobile Device Management (MDM). Strong troubleshooting More ❯

level. You’ll be supporting a broad range of IT infrastructure, including user management, account administration, mobile device support, networking, cloud services, end-user computing (EUC), and some legacy systems. What We’re Looking For: Proven experience in technical support roles. Understanding of virtual desktop environments and cloud services. Experience with Mobile Device Management (MDM). Strong troubleshooting More ❯

level. You’ll be supporting a broad range of IT infrastructure, including user management, account administration, mobile device support, networking, cloud services, end-user computing (EUC), and some legacy systems. What We’re Looking For: Proven experience in technical support roles. Understanding of virtual desktop environments and cloud services. Experience with Mobile Device Management (MDM). Strong troubleshooting More ❯

security, and resilience of a mission-critical network spanning over 200 sites including stations, depots, offices, and data centres. As the business completes its transition from legacy systems to a modern Fortinet SD-WAN infrastructure, this position offers the chance to shape the future of connectivity across the network. You ll work closely with the Head of More ❯

security, and resilience of a mission-critical network spanning over 200 sites — including stations, depots, offices, and data centres. As the business completes its transition from legacy systems to a modern Fortinet SD-WAN infrastructure, this position offers the chance to shape the future of connectivity across the network. You’ll work closely with the Head of More ❯

security, and resilience of a mission-critical network spanning over 200 sites — including stations, depots, offices, and data centres. As the business completes its transition from legacy systems to a modern Fortinet SD-WAN infrastructure, this position offers the chance to shape the future of connectivity across the network. You’ll work closely with the Head of More ❯