1 to 25 of 37 Legacy Systems Jobs in the City of London

scalable, secure, and reusable API architectures. • Establish API governance, lifecycle management, and versioning standards. Solution Design & Integration • Lead and document the design of end-to-end API solutions across systems (internal and external). • Ensure seamless integration with legacy systems, third-party services, and cloud platforms. • Collaborate with enterprise and domain to align solutions. Security & Compliance More ❯

scalable, secure, and reusable API architectures. • Establish API governance, lifecycle management, and versioning standards. Solution Design & Integration • Lead and document the design of end-to-end API solutions across systems (internal and external). • Ensure seamless integration with legacy systems, third-party services, and cloud platforms. • Collaborate with enterprise and domain to align solutions. Security & Compliance More ❯

who thrives at the intersection of technology, transformation, and business value? We're supporting a well-established financial services organisation undergoing a major change programme. They're modernising core systems and moving a significant number of legacy applications to the cloud - and they need a technical Delivery Manager to drive success across key change initiatives with strong … over £2m. Translating strategic goals into practical execution plans with measurable outcomes. Managing cross-functional teams across business, technology, and change. Overseeing cloud-related change delivery - including application migration, systems decommissioning, and platform integration. Owning stakeholder engagement and ensuring smooth handover into operations. What we're looking for A proven track record delivering complex technology-enabled change in regulated … environments. Strong knowledge of cloud transformation - particularly moving legacy systems to Azure Cloud). Comfortable with both Agile and traditional delivery methodologies (e.g., Scrum, Kanban, Waterfall). A confident communicator able to influence at senior levels and drive results across matrix teams. Experience in Financial Services, Insurance, or Pensions preferred. Why apply? This is a chance to More ❯

a Microsoft-centric, Azure-native estate. This is a greenfield opportunity to define architecture strategy, governance frameworks, and drive transformation. * Define data architecture strategy for disparate legacy systems across numerous business lines. * Maximise £200k+ annual Microsoft E5 licensing investment. * Design CSS portal multi-tenancy architecture enabling US enterprise expansion. * Establish architecture governance appropriate for scale. * Optimise Azure More ❯

a Microsoft-centric, Azure-native estate. This is a greenfield opportunity to define architecture strategy, governance frameworks, and drive transformation. * Define data architecture strategy for disparate legacy systems across numerous business lines. * Maximise £200k+ annual Microsoft E5 licensing investment. * Design CSS portal multi-tenancy architecture enabling US enterprise expansion. * Establish architecture governance appropriate for scale. * Optimise Azure More ❯

Engineer to join a major cloud transformation programme for a global logistics and maritime services organisation. This role sits within a high-performing engineering team responsible for migrating core systems and services to the cloud a key strategic initiative that drives scalability, resilience, and global efficiency. The Role You’ll play a pivotal role in architecting, automating, and supporting … long-term sustainability. Key Responsibilities Lead infrastructure design and deployment using Terraform (IaC) Build and manage Kubernetes clusters to support containerised workloads Support the migration of legacy systems to cloud platforms (AWS, Azure, or GCP) Develop and optimise CI/CD pipelines for cloud-native delivery Create automation scripts and tools — ideally using Python Implement monitoring, alerting More ❯

Engineer to join a major cloud transformation programme for a global logistics and maritime services organisation. This role sits within a high-performing engineering team responsible for migrating core systems and services to the cloud a key strategic initiative that drives scalability, resilience, and global efficiency. The Role You’ll play a pivotal role in architecting, automating, and supporting … long-term sustainability. Key Responsibilities Lead infrastructure design and deployment using Terraform (IaC) Build and manage Kubernetes clusters to support containerised workloads Support the migration of legacy systems to cloud platforms (AWS, Azure, or GCP) Develop and optimise CI/CD pipelines for cloud-native delivery Create automation scripts and tools — ideally using Python Implement monitoring, alerting More ❯

based on experience) - Hybrid working (3 days in office). This person will lead engineering and DevOps across the banks Cross-Product Platforms, providing technical and strategic direction for systems supporting key Group Functions such as Risk, Finance, and Regulatory Reporting. The Head of Engineering will oversee a distributed team of 30+ engineers and developers across London, Dublin, and … India, driving high-quality software delivery, modernising legacy technology, and establishing consistent engineering and platform standards. The role requires a seasoned technology leader with experience in large, global banking environments, strong stakeholder management skills, and the ability to lead … transformation across complex, multi-domain environments. Key requirements: Proven background managing globally dispersed engineering teams (20-30+ heads) in global banks. Experience with Microsoft-based legacy systems (.NET, C#, SQL, Azure, on-prem/cloud) and emerging technologies including Linux, Java, microservices, and containerisation (Docker, Kubernetes, Helm, Camunda). Proficiency in CI/CD pipelines (Jenkins More ❯

based on experience) - Hybrid working (3 days in office). This person will lead engineering and DevOps across the banks Cross-Product Platforms, providing technical and strategic direction for systems supporting key Group Functions such as Risk, Finance, and Regulatory Reporting. The Head of Engineering will oversee a distributed team of 30+ engineers and developers across London, Dublin, and … India, driving high-quality software delivery, modernising legacy technology, and establishing consistent engineering and platform standards. The role requires a seasoned technology leader with experience in large, global banking environments, strong stakeholder management skills, and the ability to lead … transformation across complex, multi-domain environments. Key requirements: Proven background managing globally dispersed engineering teams (20-30+ heads) in global banks. Experience with Microsoft-based legacy systems (.NET, C#, SQL, Azure, on-prem/cloud) and emerging technologies including Linux, Java, microservices, and containerisation (Docker, Kubernetes, Helm, Camunda). Proficiency in CI/CD pipelines (Jenkins More ❯

embedded in some of the UK’s most ambitious financial services programmes. They work closely with business and technology leaders to drive strategic change, from platform modernisation and core systems reengineering, to cloud adoption and integration overhaul. Your Role You’ll be part of a highly credible, expert-led team shaping complex solutions across the full technology stack. Whether … modernising legacy systems, enabling cloud-first strategies, or improving end-to-end integration, you’ll bring structure, clarity, and delivery alignment to everything you do. What You’ll Be Doing as a Solution Architect: Lead the design and implementation of end-to-end solutions across application, integration, and infrastructure domains Shape and steer technology change across major … You’ll Bring as a Solution Architect: You’re a credible solution architect who thrives in fast-paced, high-compliance environments. You understand the realities of Financial Services, legacy complexity, data sensitivity, and the need to balance innovation with control. Key Experience: Deep experience in Financial Services (e.g. banking, insurance, wealth, or capital markets) Proven success delivering architecture More ❯

embedded in some of the UK’s most ambitious financial services programmes. They work closely with business and technology leaders to drive strategic change, from platform modernisation and core systems reengineering, to cloud adoption and integration overhaul. Your Role You’ll be part of a highly credible, expert-led team shaping complex solutions across the full technology stack. Whether … modernising legacy systems, enabling cloud-first strategies, or improving end-to-end integration, you’ll bring structure, clarity, and delivery alignment to everything you do. What You’ll Be Doing as a Solution Architect: Lead the design and implementation of end-to-end solutions across application, integration, and infrastructure domains Shape and steer technology change across major … You’ll Bring as a Solution Architect: You’re a credible solution architect who thrives in fast-paced, high-compliance environments. You understand the realities of Financial Services, legacy complexity, data sensitivity, and the need to balance innovation with control. Key Experience: Deep experience in Financial Services (e.g. banking, insurance, wealth, or capital markets) Proven success delivering architecture More ❯

multi-channel retailer, offering incredible products for every occasion. The Role My client are going through an enterprise-wide modernisation which will include the upgrading of legacy systems, re-platforming their ecommerce solution, the implementation of a new CRM & marketing solutions and other customer engagement technologies. Key Responsibilities Architecture Leadership : Define and lead solution architecture for transformational More ❯

multi-channel retailer, offering incredible products for every occasion. The Role My client are going through an enterprise-wide modernisation which will include the upgrading of legacy systems, re-platforming their ecommerce solution, the implementation of a new CRM & marketing solutions and other customer engagement technologies. Key Responsibilities Architecture Leadership : Define and lead solution architecture for transformational More ❯

Lead Integration Architect - Workday Contract/Outside IR35 A leading UK-based organisation is undergoing a strategic transformation of its enterprise systems, with Workday at the core of its HR and finance operations. We're seeking a Lead Integration Architect to design and oversee the integration landscape, ensuring seamless data flows across platforms using Workato. Key Responsibilities * Define and … Ensure alignment with enterprise architecture principles and IT governance * Collaborate with Workday implementation teams to ensure integration readiness * Design and implement data flows between Workday and legacy systems * Support data migration, validation, and reconciliation * Own Workato platform governance, performance, and roadmap * Lead development of APIs, connectors, and integration workflows * Manage vendor relationships and platform capabilities * Translate business More ❯

expertise in HubSpot with a creative marketing mindset. You will take full ownership of DGHE’s new HubSpot CRM, leading its integration and the data migration from our legacy system (ActiveCampaign). You will build and segment our prospective-student database and design automated email journeys that nurture leads through to enrolment. In parallel, you’ll produce high More ❯

Pre-Sales Solution Architect – Legacy Modernisation Hybrid – UK London £100,000 – £130,000 + package 🚀 Shape the next era of enterprise software modernisation. We’re partnering with a major global technology consultancy that’s redefining how large organisations modernise and rebuild their software estates. They’re looking for a technically credible, commercially minded Pre-Sales Solution Architect — someone … engineering knowledge with the ability to craft compelling modernisation solutions for complex clients. You’ll sit at the intersection of technology, sales and strategy — helping enterprise customers escape legacy constraints, adopt modern architectures, and embed AI into every stage of their software delivery lifecycle. 🔧 What you’ll be doing Partner with senior sales and delivery teams to scope … large, multi-service transformation bids (£5m+) , ensuring each proposal is both technically robust and commercially sound. Translate complex client estates into clear modernisation roadmaps — from monolithic legacy systems to cloud-native, modular, AI-augmented architectures . Champion the use of AI within the SDLC , leading technical demos and developing go-to-market offerings around intelligent automation, testing More ❯

Pre-Sales Solution Architect – Legacy Modernisation Hybrid – UK London £100,000 – £130,000 + package 🚀 Shape the next era of enterprise software modernisation. We’re partnering with a major global technology consultancy that’s redefining how large organisations modernise and rebuild their software estates. They’re looking for a technically credible, commercially minded Pre-Sales Solution Architect — someone … engineering knowledge with the ability to craft compelling modernisation solutions for complex clients. You’ll sit at the intersection of technology, sales and strategy — helping enterprise customers escape legacy constraints, adopt modern architectures, and embed AI into every stage of their software delivery lifecycle. 🔧 What you’ll be doing Partner with senior sales and delivery teams to scope … large, multi-service transformation bids (£5m+) , ensuring each proposal is both technically robust and commercially sound. Translate complex client estates into clear modernisation roadmaps — from monolithic legacy systems to cloud-native, modular, AI-augmented architectures . Champion the use of AI within the SDLC , leading technical demos and developing go-to-market offerings around intelligent automation, testing More ❯

Career Just graduated and ready to launch your career in high-performance technology and quantitative finance? Join a leading global trading firm where innovation rules — no legacy systems, no bureaucracy, just a fast-paced, intellectually challenging environment built for growth. With unlimited access to cutting-edge tech and mentorship from world-class engineers and quants, you’ll … work on impactful projects that help shape the future of trading. What You’ll Do 🧠 Build and enhance advanced trading systems and infrastructure 📊 Design and implement your own quantitative models 🤝 Collaborate closely with top engineers, quants, and researchers on complex problems 🚀 Rapidly learn and develop your skills in a culture that rewards initiative What You’ll Bring 🎓 Degree in More ❯

Career Just graduated and ready to launch your career in high-performance technology and quantitative finance? Join a leading global trading firm where innovation rules — no legacy systems, no bureaucracy, just a fast-paced, intellectually challenging environment built for growth. With unlimited access to cutting-edge tech and mentorship from world-class engineers and quants, you’ll … work on impactful projects that help shape the future of trading. What You’ll Do 🧠 Build and enhance advanced trading systems and infrastructure 📊 Design and implement your own quantitative models 🤝 Collaborate closely with top engineers, quants, and researchers on complex problems 🚀 Rapidly learn and develop your skills in a culture that rewards initiative What You’ll Bring 🎓 Degree in More ❯

data, IT, operations and PMO Vendor & Delivery Management • Manage relationships with third-party development vendors to ensure high-quality and timely delivery. • Coordinate development efforts, including integration with legacy and modern systems. • Facilitate contract negotiation, SOW co-ordination and budget tracking with performance reporting for external partners. Customer Focus & Insight • Champion client needs through data, research, and insight. More ❯

data, IT, operations and PMO Vendor & Delivery Management • Manage relationships with third-party development vendors to ensure high-quality and timely delivery. • Coordinate development efforts, including integration with legacy and modern systems. • Facilitate contract negotiation, SOW co-ordination and budget tracking with performance reporting for external partners. Customer Focus & Insight • Champion client needs through data, research, and insight. More ❯

Backend Engineer - Scale Systems with Real Impact ?? Tired of tinkering at the edges? Want to actually shape the backbone of a platform that's transforming how the world's biggest enterprises run their tech? This is one of those rare roles where you get in early, build the foundations, and watch your work scale across global businesses. We're … AI-driven platform is already saving household-name customers millions in IT costs, shaving months off ERP project timelines, and making sense of the mess that legacy systems leave behind. SAP is just the beginning - they're building a whole new category of Enterprise System Intelligence. The Role As one of the first Backend Engineers focused on … platform and infrastructure, you'll: Build core systems capable of handling tens of millions of lines of code and large-scale LLM workloads. Own big pieces of the architecture - from job orchestration to APIs, infra, and developer tooling. Make product teams fly by building reliable, well-designed infrastructure that scales without slowing anyone down. Tame complex LLM infrastructure (real More ❯

Product Manager – Digital & Asset Systems The Opportunity A leading organisation is delivering a major long-term infrastructure and sustainability programme. We’re looking for a Product Manager to take ownership of critical digital and data systems that support complex assets, large-scale projects, and multi-organisation collaboration. This role sits at the heart of a multi-billion-pound … shape the strategy and tools that enable efficiency, compliance, and smarter decision-making. What You’ll Be Doing Manage digital products spanning asset management, GIS, and programme/project systems . Shape and deliver a multi-year roadmap that aligns multiple stakeholders under one data strategy. Lead upgrades, migrations, and integrations of legacy systems into modern … local government, digital services, or infrastructure programmes) . Experience managing complex digital or data-driven products. Strong background in stakeholder alignment across multiple organisations. Comfortable working with both technical systems and non-technical users. Understanding of asset data, GIS, or large-scale programme systems. Agile mindset with the ability to manage change and modernisation. What’s on Offer More ❯

Product Manager – Digital & Asset Systems The Opportunity A leading organisation is delivering a major long-term infrastructure and sustainability programme. We’re looking for a Product Manager to take ownership of critical digital and data systems that support complex assets, large-scale projects, and multi-organisation collaboration. This role sits at the heart of a multi-billion-pound … shape the strategy and tools that enable efficiency, compliance, and smarter decision-making. What You’ll Be Doing Manage digital products spanning asset management, GIS, and programme/project systems . Shape and deliver a multi-year roadmap that aligns multiple stakeholders under one data strategy. Lead upgrades, migrations, and integrations of legacy systems into modern … local government, digital services, or infrastructure programmes) . Experience managing complex digital or data-driven products. Strong background in stakeholder alignment across multiple organisations. Comfortable working with both technical systems and non-technical users. Understanding of asset data, GIS, or large-scale programme systems. Agile mindset with the ability to manage change and modernisation. What’s on Offer More ❯

infrastructure practices across Europe and empowering teams to deliver quality software at speed. Who We Are 🐶 IVC Evidensia is undergoing a major digital transformation. From modernising legacy systems to building cloud-native platforms, we’re laying the technical foundations to support over 2,500 veterinary practices in 20 countries. The Role 💡 As Platform Engineering Manager, you’ll More ❯