176 to 200 of 277 Legacy Systems Jobs in London

underpins Outsmart’s crowdsourcing operations – a mature, revenue-generating system that has evolved over years and continues to scale. If you enjoy owning real systems, thinking architecturally, improving legacy code thoughtfully rather than rewriting it, and being trusted to deliver without heavy supervision, this role will feel … unusually well-matched. The role As Senior Fullstack Software Engineer, you will help design, build and maintain the production systems that power Outsmart’s platform. You’ll work closely with our CTO, operating as a high‐agency individual contributor with genuine ownership across backend systems, infrastructure and platform ...

partnering with a nationally focused organisation working across energy efficiency, sustainability and the delivery of government-backed programmes to recruit a Finance Systems Project Manager on a two-year fixed-term contract. The organisation manages significant grant and loan programmes on behalf of government and local authorities, alongside … growing portfolio of commercial work. It is now embarking on a major finance systems transformation, replacing a long-established legacy system with Microsoft Business Central. This is a hands-on project management role rather than a pure systems accounting position. The successful candidate will lead ...

join at an important stage of the transformation, helping to shape the architecture and provide technical leadership as the organisation moves from a legacy data estate towards a scalable, modern cloud platform. You will be responsible for designing the target architecture, defining data patterns and standards, supporting migration … Cloud Data Platform. Develop a prioritised migration roadmap, identifying dependencies, risks and opportunities. Lead architectural input into the migration of legacy data systems onto the new platform. Identify opportunities for data consolidation, rationalisation and standardisation during migration. Define appropriate approaches for data validation, verification and reconciliation ...

infrastructure underpin our economy and daily lives. Yet many of the organizations responsible for them are constrained by fragmented processes, fragile legacy systems, and decades-old ways of working. These organizations must manage aging assets, deliver major infrastructure programs, meet tighter standards, and keep essential services running. … experience in a job where solving complex client problems using customisable software/product was core to the role: this could be product management, systems engineering, a deployment strategist role, technical consultancy, etc. Experience of leading and growing high‐performance teams, including hiring, role mapping, resourcing, performance management Experience ...

will play a key role in understanding banking application data, mapping data across workstreams, and ensuring accurate and compliant migration from legacy systems to new solutions. This is an onshore UK-based role with direct engagement across engineering, business, and compliance stakeholders. #J-18808-Ljbffr ...

teams and driving the strategy for Agency Lending and Collateral Technology platforms. The successful candidate will oversee a major transformation from legacy systems to modern architectures, delivering innovative solutions that meet business needs. A strong background in financial services technology and leadership is essential. #J-18808-Ljbffr ...

including CICS, z/OS, and COBOL, to work on critical banking applications. The role involves development, maintenance, and optimization of legacy systems, with a focus on performance tuning and production support. Candidates should have strong skills in DB2, IMS, and experience with Agile methodologies. This ...

apps, focusing on front‐to‐back capabilities and robust, scalable solutions. You will mentor teams, drive architectural decisions, and help migrate legacy systems to the cloud while aligning with Marex’s agile and AI-enhanced development initiatives. #J-18808-Ljbffr ...

Identity and Access Management (Entra ID/Azure AD), MFA, and RBAC, plus data integration and RESTful APIs to connect to legacy systems and third-party services. #J-18808-Ljbffr ...

apps. Based in the Netherlands, the role combines onsite and remote work across a hybrid setup, with a focus on modernising legacy systems using Java/Spring Boot and Angular. You will work with business stakeholders to translate requirements into scalable solutions, implement CI/ ...

.NET and SQL Server experience for a bank-based role in Central London. The candidate will automate and streamline processes, integrate legacy systems with modern data workflows, and support cross-departmental IT initiatives. The role requires 7+ years of hands-on development, expertise in SSIS/SSRS ...

available for their entire digital ecosystem.Key RequirementsSolid understanding of data, API’s and digital architectures – comfortable dealing with technical architects and legacy systems, facilitating sessions with clear logical outcomesSignificant experience in developing product strategy and roadmap using data and research to drive changeExperience of managing multiple projects ...

contact. Essential – complex B2B platform sales. Long cycles, multi‐stakeholder committees, six‐figure deals. Valuable – replacement selling. You have displaced entrenched legacy systems and know the status quo is the real competitor. Valuable – procurement fluency. Public‐sector, charity or council tendering experience is a genuine asset. Rates ...

needs Competitive stock options program and location-based salary Who we are: Sanity.io is a modern, flexible content operating system that replaces rigid legacy content management systems. One of our big differentiators is treating content as data so that it can be stored in a single source ...

trillion on benefits every year. It's their second-largest cost after payroll — yet the entire category is still running on legacy systems and outdated assumptions. AI-first startups have almost completely overlooked it, and incumbents, constrained by decades-old tech stacks, simply can't move fast ...

Working closely with Data Architecture, Analytics, and wider business teams, you will be responsible for designing and maintaining robust data pipelines, integrating multiple business systems, and ensuring data remains trusted, accessible, consistent, and fit for purpose. This role is ideal for a technically strong data engineering professional who enjoys … Data Engineering Lead, you will: Design, develop and maintain enterprise ETL/ELT pipelines, integrating data from case management, finance, CRM and third-party systems into a central data platform. Lead the development and continuous improvement of our cloud-based data platform within Azure. Ensure data pipelines are scalable ...

About Venmark Safety-critical industries are under mounting pressure. The work that keeps buildings, workplaces, infrastructure, and the public safe relies on paperwork, fragmented systems, and manual reporting. The result is a growing backlog of inspections and certifications, and in this industry, delay has real human consequences. Venmark … team to match. About you Strong requirements Strong engineer, comfortable across any tech stack, does not need hand-holding to ship Has shipped real systems and wants to do it again in a place where it counts Comfortable travelling 2–3 days a week to work directly with businesses ...

trading platform. The role involves delivering production-ready trading tools, collaborating with traders and data teams, and supporting both greenfield and legacy systems across C++, Python and Typescript. #J-18808-Ljbffr ...

redesign. Support the rollout of server-driven UI, enabling card layouts to be updated through configuration. Migrate traffic from legacy systems to the new platform. Apply API design considerations, including additional calls, traffic management, and error handling. Deliver reliable software with a rigorous development approach ...

redesign and BEX redesign.Support the rollout of server-driven UI, enabling card layouts to be updated through configuration.M igrate traffic from legacy systems to the new platform.Apply API design considerations, including additional calls, traffic management, and error handling.Deliver reliable software with a rigorous development approach ...

redesign. Support the rollout of server-driven UI, enabling card layouts to be updated through configuration. Migrate traffic from legacy systems to the new platform. Apply API design considerations, including additional calls, traffic management, and error handling. Deliver reliable software with a rigorous development approach ...

Lead Business Analyst to join the CHAPS Modernisation programme within the Payments CIO. The role focuses on transforming payment processing from legacy systems to strategic platforms, improving resilience, control and scalability. You will shape and deliver complex business and technology change across multiple teams and stakeholders ...

design, and own features from requirements through delivery with cross-functional teams. The role emphasizes server-driven UI rollout, migration from legacy systems, and delivering high-quality software with a rigorous approach. #J-18808-Ljbffr ...

Sanity.io is a modern, flexible content operating system that replaces rigid legacy content management systems. In this Enterprise Account Executive role, you will own the full sales cycle end to end, selling infrastructure to engineering teams and collaborating with SDRs, marketing, and product to turn technical buyers into ...

solutions, and a deep understanding of modern architecture patterns. This position offers an opportunity to be at the forefront of transforming legacy systems into a modern, data-driven architecture. #J-18808-Ljbffr ...