21 of 21 Contract Legacy Systems Jobs in London

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 ...

scalable services using Python as the primary backend language, while supporting existing services built in Java and .NET. Maintain and enhance legacy systems using Oracle SQL PL. Implement Test-Driven Development (TDD) practices, ensuring automated tests are written prior to code development. Work with complex data challenges ...

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 ...

will work within a delivery squad, collaborating closely with stakeholders, product owners, and technical teams to enable seamless migration from legacy systems and drive adoption of Salesforce across the organisation. Key Responsibilities: Engage with business stakeholders to gather, validate, and prioritise requirements. Analyse existing processes and identify ...

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 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 ...

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 ...

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 ...

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 … paced, client-facing environment. Excellent communication skills, able to translate technical solutions into business value. QUALIFICATIONS Bachelors 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. ...

This role is critical for technical readiness, involving the design of integration patterns that will connect the new HCM with crucial internal and external systems across HR, Finance, and Payroll. The Role: End-to-End Integration Strategy & Delivery You will report directly to the Senior Technical Delivery Manager, acting … PECI, and APIs. Middleware Expertise: Leverage experience with middleware platforms (e.g., MuleSoft, Boomi, Azure Integration Services) to connect Workday to third-party and legacy systems. Delivery Management: Oversee the build, testing, and secure deployment of multiple integrations in parallel, collaborating closely with IT and external vendors. Compliance: Produce ...

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 ...

inbound end-to-end integration of master data to SAP. The successful applicant will gather requirements, manage architecture dependencies, coordinate with legacy system teams, and ensure successful delivery of article integration into SAP systems. Key Responsibilities: Gathering requirements and defining high-level requirements for design E2E Master data … approval Overseeing inbound integration of master data into SAP Validating master data flow into SAP during SIT and UAT phases Coordinating with the legacy team for high-level requirements Managing SAP dependencies on architecture E2E design and related streams MDG, BTP Engaging with stakeholders, including solution architects ...