24 of 24 Contract Legacy Systems Jobs in London

Technical Architect Are you someone with a passion for transforming legacy systems into modern, scalable solutions? Join us as a Technical Architect and lead the way in redefining banking integration platforms and data warehouses. Based in London, you'll be at the forefront of innovative architectures, collaborating … with top-tier professionals to deliver future-proof, high-performance systems that meet stringent regulatory standards. Required Skills: - Over 10 years of experience in application architecture and design, with deep expertise in .NET/C#, SQL Server, and integration technologies - Proven track record of modernising legacy monolithic ...

modernization program. This is an opportunity to work on a cutting-edge initiative leveraging AI and modern data platforms to transform legacy systems into a future-ready architecture. What You'll Do Phase 1: Foundation & Discovery Legacy Inventory & Triage: Lead discovery of 40-50 legacy ...

support a major, multi-year MOD information and knowledge management programme. The programme is focused on migrating several disparate legacy systems onto a MOD-hosted enterprise Product Lifecycle Management (PLM) solution and has already delivered an initial MVP. You will be embedded client-side within ...

experience in Change Data Capture (CDC). The candidate will design and implement robust data migration strategies, ensuring seamless integration between legacy systems and modern cloud-based architectures. Responsibilities Architect CDC Pipelines: Design and optimize Change Data Capture workflows (IBM CDC or equivalent), including subscription design, bookmarks ...

looking for a senior C# Developer with a strong architectural focus to join a highly skilled engineering team working on business-critical systems at scale . This role sits at the heart of a major technology estate and offers the chance to modernise legacy platforms , shape technical … Doing Designing and developing applications using .NET Framework/.NET Core , React/TypeScript , Python , and relational databases Refactoring and modernising legacy systems to reduce technical debt and improve performance and reliability Embedding modern security patterns across APIs and services (authentication, authorisation, OWASP controls, secure access) Contributing ...

digital transformation. Working as part of the Digital Solutions team, you will design, build and maintain APIs, services and integration patterns that connect systems across the business. Back End Integration Engineer's Key Responsibilities Design and implement integrations between internal systems, cloud services and third-party vendor platforms. … work effectively across technical and business teams. Good understanding of data flows, data modelling and system interoperability. Experience integrating with legacy systems and/or third-party vendor platforms. Role Overview: Position : Back End Integration Engineer Type : Contract Location : London – Hybrid – 2/3 days per week ...

digital transformation. Working as part of the Digital Solutions team, you will design, build and maintain APIs, services and integration patterns that connect systems across the business. Back End Integration Engineer’s Key Responsibilities Design and implement integrations between internal systems, cloud services and third-party vendor platforms. … work effectively across technical and business teams. Good understanding of data flows, data modelling and system interoperability. Experience integrating with legacy systems and/or third-party vendor platforms. Role Overview: Position : Back End Integration Engineer Type : Contract Location : London – Hybrid – 2/3 days per week ...

digital transformation. Working as part of the Digital Solutions team, you will design, build and maintain APIs, services and integration patterns that connect systems across the business. Back End Integration Engineer’s Key Responsibilities Design and implement integrations between internal systems, cloud services and third-party vendor platforms. … work effectively across technical and business teams. Good understanding of data flows, data modelling and system interoperability. Experience integrating with legacy systems and/or third-party vendor platforms. Role Overview: Position : Back End Integration Engineer Type : Contract Location : London – Hybrid – 2/3 days per week ...

Framework/.NET Core, HTML/CSS/TypeScript/React, Python, SQL Server, Oracle). The role focuses on refactoring legacy systems to reduce technical debt, improve reliability and performance, and embed modern security patterns across the service estate. Tasks Design, build, and maintain server-side … TypeScript, Python, and relational databases (SQL Server, Oracle); contribute to API and UI development, data access layers, and integration points. Refactor and modernise legacy codebases: modularisation, dependency updates, performance tuning, improved observability, and raising automated test coverage within CI/CD. Embed modern security patterns and controls across ...

business teams, and network teams for data requirements. Implement best practices for data governance, security, and cost management. Support migrations from legacy systems to AWS-native data lakes or Redshift. Ideal Candidate Profile 310+ years of experience in AWS Data Engineering/Support Engineering. Strong telecom domain ...

migration phases Interface with Oracle Fusion data models and manage FBDI, HDL, and BICC artefacts Coordinate migration activities across multiple legacy source systems Provide leadership and guidance to technical and functional teams Identify, manage, and mitigate risks related to data quality, security, and cutover readiness Minimum Requirements … projects for Oracle Fusion Cloud Financial Management, HCM, and EPM Experience working in complex legacy environments with both Oracle and non-Oracle systems Proven experience with Oracle Master Data Management products Strong understanding of data management methodologies Excellent problem-solving, analytical, communication, and leadership skills Ability ...

Excellent communication skills Exceptional Stakeholder Management skills Flexible approach towards onsite working (minimum 3 days per week) Nice to have: Working knowledge of CRM systems and ability to refine requirements (ie MS Dynamics) Experience of working on Programmes relating to legacy systems, mapping out what ...

work within a collaborative, multidisciplinary environment to design, build, and maintain high-quality digital services. The role involves contributing to both new and existing systems, supporting multiple languages and platforms, and applying strong DevOps, TDD, and modern engineering practice throughout. Key Responsibilities Develop new services using Python while supporting … existing components written in Java and .NET Work with Oracle PL/SQL to support legacy and operational systems Engineer solutions across cloud and infrastructure environments including AWS, Azure, Linux, SQL Server, Postgres, Docker, and Kubernetes Implement CI/CD pipelines using GitHub or Azure DevOps Deliver ...

lead a major tax software migration within its UK Life Tax division. Key Responsibilities Lead the end-to-end migration from a legacy tax system to a new third-party platform. Manage planning, timelines, risks, and stakeholder updates. Oversee data configuration, data take-on, and system testing ...

experience in leading data migration projects for Oracle Fusion Cloud Financial Management , HCM and EPM within a complex legacy environment of source systems, which include Oracle and non-Oracle point systems Proven experience of Oracle master data management products Solid understanding of Fusion data models ...

working with a London based college who is seeking an HR data specialist to migrate HR data from their legacy system software for people into Cintra and clean up existing data within the platform. Contract Details Start date: ASAP Contract Length: 3 - 6 months Location: London (Hybrid) IR35 ...

providing regular progress updates.? Oversee data configuration and take-on activities, including strong data analytics skills tocompare, reconcile, and validate outputs from the legacy system to the new platform.? Lead and manage a small test team, coordinating testing efforts across multiple locations.? Ensure all project communications are accurate ...

data modelling. Skilled in building end-to-end business process applications, configuring workflows, implementing business rules, managing records, and integrating Appian with external systems via REST APIs, web services, and connected systems. API Development & Integration - Proficient in designing and building RESTful APIs using FastAPI, Flask, or Django REST Framework … models and automation services. Experience with API authentication (OAuth, JWT), rate limiting, error handling, API documentation (Swagger/OpenAPI), webhooks, and integrating disparate systems to create seamless automated workflows. Document Processing & OCR - Experience implementing intelligent document processing solutions using OCR technologies (Tesseract, Azure AI Document Intelligence, natural language processing ...

Technical Architect Are you someone with a passion for transforming legacy systems into modern, scalable solutions? Join us as a Technical Architect and lead the way in redefining banking integration platforms and data warehouses. Based in London, you'll be at the forefront of innovative architectures, collaborating … with top-tier professionals to deliver future-proof, high-performance systems that click apply for full job details ...

secure, and compliant data management practices, in line with G.D.P.R. and relevant data regulations. Support the migration and modernisation of legacy data systems into Azure and Microsoft Fabric environments. Monitor, troubleshoot, and improve data workflows, implementing automation and error-handling as needed. Produce and maintain technical documentation … client-facing environment. Excellent communication skills, able to translate technical solutions into business value. QUALIFICATIONS Bachelor’s degree in Computer Science, Data Engineering, Information Systems, or a related field preferred. At least 3 years of experience as a Data Engineer, ideally in consulting, professional services, or large enterprise environments. ...

responsible for developing and improving a core Python/Django server-side application , ensuring robust integration with PostgreSQL , and supporting the modernisation of legacy systems. This is a high-impact role where your work will directly contribute to the stability, security, and efficiency of a vital public service. … Django application. Manage and optimise PostgreSQL databases, ensuring high performance and data integrity. Collaborate with cross-functional teams to support the modernisation of legacy systems. Write clean, maintainable, and well-documented code following best practices. Ensure compliance with security standards and contribute to risk mitigation. Participate in code ...

August 2026 . This is a hands-on role managing a new vendor solution, overseeing testing and reconciliation between legacy and new systems, and working directly with multiple life insurance clients. The role You'll take ownership of the end-to-end delivery of a UK Life … milestones, risks and delivery timelines Managing and coordinating a test team of 3-4 people Comparing, validating and reconciling outputs from old vs new systems Acting as the primary point of contact for clients, managing expectations and issues through to go-live Liaising closely with the software vendor ...

system conversions. The Opportunity You will take ownership of a full end-to-end software conversion programme, managing the transition from a legacy system to a new vendor solution across multiple UK Life clients and funds. The role combines technical UK Life tax expertise, stakeholder engagement and hands … client communications throughout the conversion process Manage detailed project plans, timelines, risks and dependencies Reconcile and validate outputs between legacy and new systems, ensuring accuracy and completeness Lead and coordinate a small test team (c. 3–4 people), working with offshore and onshore stakeholders Provide regular progress ...

working with a London based college who is seeking an HR data specialist to migrate HR data from their legacy system software for people into Cintra and clean up existing data within the platform. Contract Details Start date: ASAP Contract Length: 3 - 6 months Location … London (Hybrid) IR35: Outside Rate: TBC Required Experience Hands-on HR data migration experience Strong data cleansing and validation skills Previous work with HR systems (Cintra experience desirable) Experience within a college or education environment preferred Please click here to find out more about our Key Information Documents. Please ...