17 of 17 Contract Legacy Systems Jobs in London

Finance Systems (SAP) Lead Work Location: Chiswick, London, UK (3 days) It Means More (Personalised Bullet Points) We are seeking a highly skilled and hands-on SAP Finance Process Lead to support and enhance customer's Finance operations within SAP ECC 6. This role will serve as the primary SAP expert for the Finance function, responsible for both business … users, providing expertise and troubleshooting support. The ideal candidate will have deep functional knowledge of SAP Finance modules, strong configuration skills, and the ability to bridge legacy systems with future-state architecture3rd personalised bullet points The Role Candidate would be able to work with Business teams. This role ensures smooth operation and efficient use of SAP applications … in SAP configuration and support for core Finance processes. Experience in year-end and month-end close processes, including reporting and reconciliation. Demonstrated ability to analyse legacy systems, identify improvement opportunities, and plan for future-state architecture. Experience working on SAP change and enhancement projects, coordinating or supporting end-to-end testing, cutover, and hypercare activities for More ❯

Overview The client is seeking a mid-to-senior level contractor with strong backend and infrastructure development experience. The successful candidate will work on maintaining and upgrading a legacy Java/Oracle system, collaborating with existing developers to gain domain knowledge and contribute to modernisation efforts using cloud-based technologies. Key Responsibilities * Maintain and enhance a monolithic Java … skills and a passion for working with data * Be comfortable working with legacy Oracle PL/SQL code and motivated to improve it * View legacy systems as an opportunity to gain valuable domain knowledge * Embrace 3rd line support responsibilities and seek ways to automate and improve support processes * Be proficient in test-driven development and More ❯

Role OverviewThe client is seeking a mid-to-senior level contractor with strong backend and infrastructure development experience. The successful candidate will work on maintaining and upgrading a legacy Java/Oracle system, collaborating with existing developers to gain domain knowledge and contribute to modernisation efforts using cloud-based technologies. Key Responsibilities* Maintain and enhance a monolithic Java … skills and a passion for working with data* Be comfortable working with legacy Oracle PL/SQL code and motivated to improve it* View legacy systems as an opportunity to gain valuable domain knowledge* Embrace 3rd line support responsibilities and seek ways to automate and improve support processes* Be proficient in test-driven development and More ❯

deploy, and support enterprise CRM software (based on Microsoft Dynamics 365) Collaborate with functional consultants to translate business requirements into technical configurations Perform data migration from legacy systems using SQL tools Create and maintain technical documentation and reports Test software releases and contribute to continuous improvement initiatives Provide second-line technical support and assist in resolving complex More ❯

testing support. Assist users in understanding application functionality and workflows. Review and approve solution designs, configuration workbooks, and test plans. Support data integration and migration from legacy systems to Oracle Cloud. Troubleshoot issues and liaise with Oracle Support as needed. Develop custom reports and dashboards using tools like BIP and OTBI. Essential Skills & Experience Proven experience in More ❯

specifications that form the golden source for all migration activities. This position bridges business, IT, and development teams to ensure accurate and efficient data transformation from Legacy systems into Avaloq. Responsibilities: Lead the creation of detailed data mapping specifications used by developers to transform data from Legacy to target systems. Engage with IT application owners … to identify golden source systems for key data elements (eg, names, emails, addresses). Define mapping rules to standardise and merge data where inconsistencies exist (eg, field formats, currency representations). Design and document data relationships and record creation logic for Avaloq, including when and how new records should be created. Facilitate workshops and meetings with business and IT More ❯

in the office eligibility to work in the UK Role Overview We are seeking a skilled Senior Developer to join a newly formed engineering team focused on removing legacy components and addressing technical debt within our Media Services products. This role will involve working closely with stakeholders to understand system requirements, designing robust replacement components, and implementing them … development (TDD) is essential, as is hands on experience in component migrations. A proactive and detail-oriented approach will be vital to ensure smooth transitions from legacy systems to scalable, reliable, and future-proof solutions. In addition, experience with software testing practices, Agile methodologies (Scrum or Kanban), and defensive programming techniques will be highly desirable. We are … looking for someone who thrives in collaborative, fast-paced teams, who can balance technical precision with delivery deadlines, and who is motivated by the challenge of modernising complex systems to drive efficiency and long-term sustainability. Essential Key Skills and Responsibilities You will have: Good working experience with continuous integration and continuous delivery (CI/CD) AWS CodePipeline expertise More ❯

platforms, and they're looking for a TypeScript Engineer to help shape the services and tooling behind this transformation. The team's mission is to replace legacy systems with clean, event-driven services and provide consistent, reliable data to applications across the business - from customer-facing products to operational systems. The Role You'll be joining a … implementing REST or GraphQL APIs, background workers, and microservices. Ability to work with SQL or NoSQL databases and understand how to model and query data effectively. Familiarity with distributed systems concepts such as event sourcing, resilience patterns, and asynchronous communication. Experience with containerised development (Docker) and deploying cloud-native applications (Azure, AWS, or GCP). Strong understanding of DevOps … TypeScript testing tools. Strong Git/GitHub workflows and experience working in collaborative, autonomous engineering teams. What You'll Bring A track record of delivering clean, production-grade TypeScript systems at scale. Strong problem-solving skills and the ability to design robust solutions within distributed environments. A collaborative mindset and enthusiasm for working with cross-functional product and engineering More ❯

redesign of business processes to improve efficiency, quality, and organisational alignment. Employing structured methodologies such as Lean or Six Sigma. Recommending the rationalisation or decommissioning of legacy systems, reporting mechanisms, or processes as appropriate. Plan, organise, and monitor detailed activities and deliverables across workstreams. Assist with scope definition and prioritisation to ensure timely and successful project delivery. … Dependencies (RAID). Facilitate workshops and stakeholder engagement sessions to capture insights and validate proposed solutions. Operate adaptively within evolving project and programme frameworks. Oversee the migration of legacy files into modern architectures, supporting broader data and digital migration strategies. Evaluate and contribute to the deployment of digital tools, including Power BI and M365. Standardise software delivery practices More ❯

desk or purely operational support background. The successful candidate must have strong experience in Microsoft Teams Voice administration and end-to-end UC migrations , particularly transitioning services from legacy voice platforms (PSTN, Avaya, etc.) to MS Teams . This is an on-site role across East London, Luton, and Bedfordshire , with frequent travel between sites -- own transport is … organised, proactive, technically confident, and able to communicate effectively with clinical and operational leaders. Main duties of the job Deliver hands-on project work for the migration of legacy telephony services to Microsoft Teams Voice . Configure, deploy, and support Teams endpoints (handsets, headsets, common-area devices). Carry out site-based readiness assessments (network, Wi-Fi, switching … accounts. Configure and manage Teams-certified handsets (Yealink or equivalent). Apply best practice for numbering, naming conventions, and governance. Telephony Migrations & Support Migrate services from legacy systems (Avaya, BT, MSD, PSTN, etc). Coordinate number PORTs with telco suppliers and ensure smooth cutovers. Test inbound/outbound routing, call flows, and contingency arrangements. Provide second and More ❯

workstream from the ground up. 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 as the primary authority for … Workday Studio, EIB, Core Connectors, 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 technical artefacts (interface inventory, data More ❯

critical project with a high-profile Government Client . This is a key technical role focusing on a vital component of the client's technology landscape: migrating a legacy message queueing system to a modern, scalable platform. ?? Key Requirements & Scope: The core objective of this role is to replace the existing IBM MQ Series with Kafka across the … expertise in Java (Backend Development). Strong, hands-on experience with Kafka (implementation, configuration, and integration). Essential knowledge of IBM MQ Series (or similar legacy messaging systems) to facilitate a seamless transition and integration. Ability to work in a fast-paced environment and deliver solutions to high government standards. Essential Criteria: Active SC (Security Check) Clearance More ❯

to cloud migration projects and shape new technology transformation workstreams. The Role Lead cloud modernisation projects (on-premise to public cloud) End-to-end life cycle management and legacy system transformation Navigate government commercial frameworks and procurement Work on new initiatives from inception with team of 5 Essential Skills Cloud modernisation experience (AWS/Azure) - disqualifying if absent … Legacy technology transformation (VMware, Hyper-V, Oracle) Government sector experience (almost essential) Agile delivery and digital service modernisation Strategic thinking with technical depth The Details Rate: £675/day inside IR35 Duration: 6 months Location: London/Bristol/Manchester (any location, flexible working) Clearance: BPSS minimum, SC preferable More ❯

to cloud migration projects and shape new technology transformation workstreams. The Role Lead cloud modernisation projects (on-premise to public cloud) End-to-end life cycle management and legacy system transformation Navigate government commercial frameworks and procurement Work on new initiatives from inception with team of 5 Essential Skills Cloud modernisation experience (AWS/Azure) - disqualifying if absent … Legacy technology transformation (VMware, Hyper-V, Oracle) Government sector experience (almost essential) Agile delivery and digital service modernisation Strategic thinking with technical depth The Details Rate: £675/day inside IR35 Duration: 6 months Location: London/Bristol/Manchester (any location, flexible working) Clearance: BPSS minimum, SC preferable More ❯

integrations sub-workstream from the ground up. This role is critical for technical readiness, involving the design of integration patterns that will connect Workday 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 as the primary authority for … Studio, EIB, Core Connectors, 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 technical artefacts (interface inventory, data … processes. Strong stakeholder management with IT, vendors, and business owners. Desirable: Previous experience in the Public Sector or regulated industries. Exposure to hybrid ecosystems where Workday coexists with legacy systems. Next Steps This is an Inside IR35 contract with a high likelihood of extension. If you are an SC Cleared Workday Integration Lead with the required greenfield experience More ❯

role within the Digital Delivery Team , working with stakeholders across Infrastructure, Architecture, Security, and Procurement. Programme Context The current environment is based on legacy Cisco and Aruba systems, a hub-and-spoke WAN model, and ageing LAN switches. This setup limits performance, introduces single points of failure, and constrains the rollout of modern technologies such as Wi More ❯

join their fast-paced team on an initial 3 month contract. This role is part of a strategic initiative to upgrade the existing Algo Collateral Management System. The legacy system, originally developed by IBM, is being replaced with the latest version provided by SmartStream, who acquired the platform in 2017. The upgrade focuses on updating the system?s … validation and backend testing. Financial Services Experience: Solid understanding of collateral management, settlements, or post-trade processing in a financial services environment. Experience working with SmartStream or Algo Collateral systems is highly desirable. Knowledge of financial instruments (e.g., derivatives, repos, securities lending) and associated collateral workflows. Desirable Skills: Experience in Agile or hybrid project delivery environments. ISTQB or equivalent More ❯