1 to 25 of 37 Contract Legacy Systems Jobs in London

will be accountable for building seamless, high-converting digital experiences that are secure, compliant, and scalable, while progressively modernising and integrating legacy systems into a future-ready platform. With a core focus on their Self-Serve capabilities for their customers. This is a hands-on role … delivery cycles, working closely with engineering teams to ensure timely, high-quality releases. Digital Transformation & Platform Evolution Drive the modernisation of legacy systems, integrating them into scalable, customer-centric digital platforms. Define and deliver API-led, modular solutions that support future growth and innovation. Select and collaborate ...

term ERP implementation project. This role will support a phased ERP rollout, ensuring accurate, compliant, and validated migration of data from legacy systems into a new enterprise platform within a regulated GMP environment. Key responsibilities: Plan, execute, and validate data migration activities from multiple legacy systems into a new ERP platform. Ensure data integrity, accuracy, traceability, and regulatory compliance throughout the migration lifecycle. Support and manage data archival, data cleansing, de-duplication, and transformation activities to improve data quality. Operate independently, managing workload, timelines, and methods of delivery. Required experience and skills ...

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 ...

large-scale ERP transformation initiative. This role is responsible for planning, executing, and validating the migration of data from multiple legacy systems into a new enterprise platform. The successful candidate will take full ownership of end-to-end migration activities, ensuring data accuracy, integrity, compliance, and traceability … throughout the migration lifecycle. Key Responsibilities Analyse legacy system data structures and define detailed data mapping rules aligned with the target ERP data model. Design, develop, and execute ETL workflows for data extraction, transformation, and loading activities. Plan and conduct trial migrations, validate outputs, and reconcile migrated data ...

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 ...

ensure performance and reliability. - Monitor solutions postdeployment and proactively resolve issues, performance problems or system changes. - Integrate Microsoft solutions with legacy systems and external APIs to ensure a joinedup technology estate. - Identify opportunities to use AI, machine learning and advanced analytics to support smarter service delivery. - Work ...

Ariba environment. Role Overview You will be responsible for delivering a controlled and effective migration from legacy OCR and document-processing systems into the Council’s new SAP landscape. The role will focus on ensuring seamless system integration, improved controls, and the realisation of efficiencies across Finance … London to support delivery and stakeholder engagement. A key element of the role will be change management , ensuring successful adoption of new processes and systems across internal teams and external suppliers. Key Responsibilities Lead the end-to-end migration of OCR and document-processing activities into SAP S/ ...

bring: - Experience designing and configuring RPA workflows, bots and automation solutions - Experience developing and maintaining automated pipelines for AI tools - Ability to integrate multiple systems and applications using APIs, JSON, XML, CSV, or other data interchange methods. - Knowledge of database environments (e.g., MS SQL, Dataverse, OneLake). - Experience working … approaches including unit, integration and performance testing. - Monitor automated solutions, proactively resolving issues and optimising performance. - Design solutions that integrate with legacy systems and external APIs to ensure interoperability and a smooth user experience. - Work in an agile, multidisciplinary environment, contributing to DevOps practices, version control ...

Data Migration Engineer to support a large-scale ERP transition by planning, executing, and validating migration of data from multiple legacy systems into a new enterprise platform. The role requires strong ownership of end-to-end migration activities, ensuring data accuracy, integrity, and compliance throughout the process. … Responsibilities Analyse legacy system data structures and define mapping rules aligned to the new ERP model. Design and execute ETL workflows for data extraction, transformation, and loading. Plan and run trial migrations, validate outputs, and reconcile results against source systems. Drive data cleansing and de-duplication efforts ...

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 ...

Role overview: The Data Analyst/Data Mapper, operating within the AWS environment, is responsible for analysing, transforming, & mapping data from legacy systems to the new LIMS system. This role demands strong analytical, technical, & AWS proficiency skills to ensure accurate, efficient, & secure data transfer. Key Responsibilities: Collaborate … with data engineers, data scientists, & business stakeholders to understand data sources, data quality, & data transformation requirements.. Perform data profiling & data quality assessments on legacy data, identifying data issues, inconsistencies & gaps. Develop & maintain data mapping, transformation rules, & data cleansing procedures tailored for the AWS environment. Required skills: AWS Services ...

high-growth, product-led scale-up who are rebuilding their entire data layer in-house after moving away from their legacy systems and processes. They are in need of a hands-on Data Platform Engineer to design, build, and own a clean PostgreSQL-based backend data platform … Have PostgreSQL (design, modelling, optimisation) SQL and relational database engineering Building backend data services (APIs, views, pipelines, ETL/ELT) Data integration with operational systems ADF or similar orchestration tools Migrating/decommissioning legacy data platforms Nice-to-Have Experience in scale-ups or lean engineering teams ...

Clearance Nice-to-Have Skills Hands-on experience with container platforms (Docker, Kubernetes) Experience designing cloud-native solutions or modernising legacy systems Exposure to regulated, enterprise, or large-scale environments Architecture or cloud certifications (e.g. TOGAF, AWS/Azure/GCP Solutions Architect ) Familiarity with monitoring, logging ...

Role Define and validate the meaning, structure, and shape of target datasets Quantify and assess data quality issues across legacy systems Translate data anomalies into clearly defined and agreed business rules with stakeholders Essential Skills & Experience Assess data completeness, validity, consistency, and uniqueness, and interpret what issues … verify transformation results Geospatial & Public Data Experience Proven experience working with geospatial data , including spatial formats (e.g. vector, raster, GeoJSON, shapefiles), coordinate reference systems, and spatial analysis workflows Strong ability to interpret and apply geographical context within data processing pipelines Demonstrated experience identifying local or regional geospatial insights ...

North London is seeking a highly experienced Interim Data Modeller to design and implement a global finance and HR data model spanning multiple source systems . This is a pure data modelling role . The focus is on structure, consistency, and correctness of data, not reporting, dashboards, or downstream … across geographies, entities, and systems. Key responsibilities include: Designing and owning global canonical data models for Finance and HR Integrating data from multiple source systems (ERP, HRIS, payroll, planning tools) Defining conformed dimensions, facts, hierarchies, and reference data Resolving data conflicts across regions, entities, and legacy systems ...

heavily investing in modernising its data landscape to become a fully data-driven organisation. This includes migrating away from traditional legacy systems and adopting scalable, cloud-native data platforms. Within this context, the Risk Foundations Platform plays a critical role. The platform's vision is to design … enterprise-grade data products that enhance risk modelling, reporting, and regulatory compliance. A key strategic priority for the team is the decommissioning of legacy data stores and replacing them with modern, cloud-based capabilities that are fully owned and managed within the platform. Programme Focus The programme focuses ...

activities into our new SAP S/4HANA and SAP Ariba landscape . The role will involve controlling the migration from legacy systems, robust integration, and the realisation of efficiency and control improvements across finance, procurement, accounts payable and wider service areas . Duties will include project … delivery, functional & technical scope (OCR/S/4/Ariba), legacy transition & decommissioning, stakeholder & vendor management, data controls & compliance, as well as change management & training. Based in the Southwark area, South East London – minimum of 2 days per week in the office. This is a contract role ...

North London is seeking a highly experienced Interim Data Modeller to design and implement a global finance and HR data model spanning multiple source systems . This is a pure data modelling role . The focus is on structure, consistency, and correctness of data, not reporting, dashboards, or downstream … across geographies, entities, and systems. Key responsibilities include: Designing and owning global canonical data models for Finance and HR Integrating data from multiple source systems (ERP, HRIS, payroll, planning tools) Defining conformed dimensions, facts, hierarchies, and reference data Resolving data conflicts across regions, entities, and legacy systems ...

Role overview: The Data Analyst/Data Mapper, operating within the AWS environment, is responsible for analysing, transforming, & mapping data from legacy systems to the new LIMS system click apply for full job details ...

high-growth, product-led scale-up who are rebuilding their entire data layer in-house after moving away from their legacy systems and processes click apply for full job details ...

rollout of a new digital technology platform. This is a high-profile assignment within a complex operational environment, supporting the transition from a legacy system to a modern, real-time solution used across the entire business. You will act as the primary interface between the programme ...

looking to appoint an experienced SQL DBA to take full ownership of their database estate across the business. The organisation operates a legacy mainframe system that is now out of support. While it is currently stable, there is a clear business risk, and they require a proactive ...

lead the design and integration of a mission-critical Emergency Services Network . This role focuses on the transition from 4G legacy systems to a cloud-native 5G Standalone (SA) architecture. The Essentials 4G Design: Deep knowledge of MME, GW-C, GW-U and interfaces … . 5G SA Design: Expertise in SBA architecture and N-interfaces (AMF, SMF, UPF). Cloud-Native: Experience with NFVI and Kubernetes (containerised systems management). Deliverables: Ownership of HLD/LLD , integration, and configuration management. Networking: Strong understanding of IP networks and core protocols. The Mission You will ...

looking for a Packet Core specialist to lead the design and integration. This role focuses on the transition from 4G legacy systems to a cloud-native 5G Standalone (SA) architecture. The Essentials looking for candidates with 3GPP 4G and 5G SA knowledge of Packet Core Network, understanding …/S8, SGi and others, for 5G SA N-interfaces/SBA architecture), knowledge of NFVI architecture/principles of containerised virtual systems management (Kubernetes) and understanding of IP networks. The role will require contributing to High and Low Level Packet Core Network designs ...