25 of 25 Contract Legacy Systems Jobs in London

data migration strategy, scope, and detailed migration plan for the TPSM implementation. Identify all in-scope data objects, legacy systems, dependencies, and required transformation rules. Define data quality standards, mapping templates, and acceptance criteria. 2. Data Mapping & Design Lead workshops with business and technical teams to define … migration rules. Ensure alignment with integrations, configuration, and ServiceNow platform architecture. 3. Data Extraction, Transformation & Loading (ETL) Oversee data extraction from legacy systems or spreadsheets. Manage development and execution of ETL scripts or tooling (e.g., ServiceNow Import Sets, MID Server, APIs). Coordinate load cycles ...

overall data migration strategy, scope , and detailed migration plan for the TPSM implementation . Identify all in-scope data objects, legacy systems, data sources, dependencies, and sequencing. Define data quality standards, migration principles, mapping templates, and acceptance criteria. Plan migration waves, mock cycles, and production cutover activities … Ensure alignment with integrations, configuration , and overall ServiceNow platform architecture. 3. Data Extraction, Transformation & Loading (ETL) Oversee extraction of data from legacy systems , databases, and spreadsheets. Manage development and execution of ETL processes using ServiceNow Import Sets , Transform Maps, MID Server, APIs , or external tools. Coordinate ...

needs. Own the delivery of direct digital product journeys , ensuring seamless experiences with high conversion rates. Drive digital transformation by modernising legacy systems and integrating them into scalable, customer-centric platforms. Select and collaborate with engineering teams to ensure robust technical solutions and efficient delivery. Design … Senior Product Owner in financial services or fintech with significant experience of Mobile Applications/APPs and Portals Strong understanding of legacy systems and experience delivering digital transformation programmes, ideally within customer portals. Solid technical knowledge of software delivery, APIs, and system integration . Deep expertise ...

needs. Own the delivery of direct digital product journeys , ensuring seamless experiences with high conversion rates. Drive digital transformation by modernising legacy systems and integrating them into scalable, customer-centric platforms. Select and collaborate with engineering teams to ensure robust technical solutions and efficient delivery. Design … Senior Product Owner in financial services or fintech with significant experience of Mobile Applications/APPs and Portals Strong understanding of legacy systems and experience delivering digital transformation programmes, ideally within customer portals. Solid technical knowledge of software delivery, APIs, and system integration . Deep expertise ...

international membership organisation operating within the healthcare education and research sector. This forward-thinking not-for-profit organisation is seeking an experienced Digital Systems Manager to join them during an exciting period of digital transformation. About the Organisation As a multidisciplinary membership organisation, they champion research, education, and knowledge … providing online learning resources to members worldwide. The role The organisation has invested significantly in digital infrastructure over recent years, replacing legacy systems with a modern, integrated tech stack centred around Salesforce and Fonteva. They have built a sophisticated member portal, integrated online payment systems ...

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 ...

functional testing using Azure Devops, XRAY and JIRA. It also includes defect tracking and management. Regression, Functional, emergency change and defect testing across systems in production. API testing, data validation, and batch process testing to ensure end-to-end system integrity. Designing and maintaining a test results dashboard … 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. In addition, the engineer will contribute ...

side and client-side applications using .NET Framework/Core , React/TypeScript , and relational databases ( SQL Server , Oracle ). Refactor legacy systems to reduce technical debt and improve performance. Implement modern security patterns (OAuth2/OpenID Connect, OWASP principles). Optimise database queries and schemas; ensure ...

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 ...

Data Migration Officer will play a key role in ensuring the accurate and secure migration of HR and payroll data from legacy systems into the new HCM platform. You will work closely with HR, technology teams, third-party suppliers, and a dedicated project team to deliver high ...

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 ...

Billing (ORMB) roadmap Provide application support for the Billing platform (BAU & enhancements) Collaborate with internal development teams to build interfaces with legacy systems Participate in testing activities , including SIT/UAT Support training and knowledge transfer to business and support teams Required Skills & Experience Strong … Excellent communication skills (technical & non-technical audiences) Nice to Have Experience with Oracle E-Business Suite (EBS) v12.2 Experience integrating Oracle Billing with legacy applications Exposure to regulated or complex billing environments Please do send an up to date CV to *Rates depend on experience and client requirements ...

Telephony Consultant to support a multi-building telephony and infrastructure upgrade across a public sector organisation . Youll assess legacy systems, recommend modern solutions, and support transitions to Teams-based telephony and refreshed physical infrastructure. What youll do Survey buildings to review legacy telephony, cabling … installation and cutover activity across multiple buildings. What youll bring Project experience of working in a large multi-site environment. Strong understanding of legacy telephony and associated physical exchange infrastructure. Knowledge of Cat5/Cat6 cabling , K rone frames, structured cabling standards and installation practices. Experience with Teams ...

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 archit click apply for full job details ...

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 ...

Telephony Consultant to support a multi-building telephony and infrastructure upgrade across a public sector organisation . Youll assess legacy systems, recommend modern solutions, and support transitions to Teams-based telephony and refreshed physical infr 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 ...

trusted architectural decision-maker within large organisations 8+ years' experience of UK Customs , covering both business and technology domains Strong understanding of enterprise-scale systems, integration, and solution design Excellent stakeholder management and communication skills Ability to operate confidently in regulated, high-profile environments Nice-to-Have Experience working … large government or public-sector programmes Exposure to legacy modernisation and complex system integration Familiarity with agile and hybrid delivery models Experience influencing architecture across multiple suppliers or vendors ...

Security Architect Requirement Rate; Flexible Location; Remote - adhoc travel to London Duration; 6 month initial You will be supporting a Legacy Application program in upgrading hundreds of business applications across Wintel, Linux and cloud environments. Core Competencies Legacy System Modernisation: Proven experience in upgrading legacy … CHECK-accredited experience conducting or supporting pre- and post-deployment security assessments, vulnerability management, and remediation planning. Technical Experience Wintel/Linux: Securing legacy applications via patching, hardening, and privilege management (e.g., Active Directory, SELinux). Cloud (AWS/Azure/GCP): Designing IAM policies, encryption (FIPS ...

public-sector environments. The role is hybrid working in London and is Inside IR35. Key Responsibilities Oversee end-to-end programmes focused on legacy application modernisation and upgrades. Lead on-premise to cloud transformation programmes (AWS and/or Azure). Drive the successful delivery of software … timeline commitments. Essential Experience Previous central government experience is mandatory. Proven experience managing large-scale technology or transformation programmes. Strong background in legacy system modernisation and cloud migration (AWS/Azure). Deep understanding of software delivery practices, methodologies, and governance. Experience managing multi-disciplinary teams and complex ...

large-scale mainframe modernisation programme within a complex enterprise environment. This is a contract role, ideal for specialists in secure API integration and legacy-to-digital transformation. The Role Youll design, build and support high-performance integration solutions using IBM DataPower Gateway, exposing core mainframe services as modern … Connect, MQ, CTG) Deep knowledge of API security, XSLT and GatewayScript Experience with API management platforms and DevOps automation Background in mainframe or legacy system modernisation projects Contract Details Contract role Hybrid working Competitive day rate Initial 6-month engagement Apply now if youre a DataPower specialist looking ...

Security Architect Requirement Rate; Flexible Location; Remote - adhoc travel to London Duration; 6 month initial You will be supporting a Legacy Application program in upgrading hundreds of business applications across Wintel, Linux and cloud environments. Core Competencies Legacy System Modernisation: Proven experience in upgrading legacy ...