1 to 25 of 45 Legacy Systems Jobs in London

Data Migration Architect, you will play a key role in preparing and assuring HR data for migration from legacy systems into a new HR environment. You will work closely with HR stakeholders, technical teams and programme colleagues to understand existing HR systems and data, identify quality … planned and governed. This is an ideal opportunity for someone who combines strong data migration and architecture experience with a practical understanding of HR systems, HR data and highly regulated environments. Key Responsibilities Engage with HR stakeholders to understand business requirements, processes and data needs. Analyse and understand legacy ...

requirements into scalable, maintainable product logic. Implement interest, accruals, repayments, fees, payment allocation, balances and lifecycle events. Support product migration from legacy systems to Vault. Collaborate with Product, Business Analysis, Architecture and Engineering teams. Develop automated tests covering business rules, edge cases and regression scenarios. Participate … reviews and technical design discussions. Investigate defects and support functional, integration, migration and production testing. Validate and reconcile financial calculations between legacy systems and Vault. Support releases and produce technical documentation. Follow engineering, security, governance and regulatory standards. Essential Skills & Experience Strong software development experience, preferably Python ...

will lead the delivery of business-critical applications while supporting a major ERP transformation programme. You'll oversee the transition from legacy systems to a new ERP platform, ensuring business continuity throughout the migration. Managing a team of application specialists, you'll coordinate testing, training and data … applications such as ERP, WMS and OMS. You'll be a confident people leader with strong stakeholder management skills, a solid understanding of enterprise systems, integrations and data governance, and experience managing multiple projects simultaneously. Knowledge of Oracle Retail would be highly advantageous, as would experience supporting legacy ...

security, performance, and backend best practices Support high-risk releases, rollouts, and cross-team dependencies across modern and legacy systems Delivery Leadership Lead delivery of complex, multi-team initiatives by managing dependencies, resources, and blockers Define and drive technical strategy, improving engineering practices and delivery processes Build … fast-paced, regulated environments Deep expertise in a relevant engineering discipline, with broad end-to-end technical knowledge Track record of owning production systems from delivery through to operational support Experience leading complex, cross-team initiatives and driving technical outcomes Strong architectural judgement and a pragmatic approach to technical ...

initial discovery phase. Analyse existing datasets and assess data quality. Develop data mapping and migration strategies. Execute data migration from legacy systems to a new cloud platform. Provide recommendations on migration approach, risks, and timelines. Support successful implementation and completion of the migration project. Map the Ocella … systems. Proven ability in data mapping , including matching and transforming data between source and target systems. Experience migrating data from legacy systems to cloud-based platforms . Ability to assess data quality, identify issues, and recommend migration approaches. Desirable Skills Previous experience with iDocs Cloud migrations . ...

initial discovery phase. Analyse existing datasets and assess data quality. Develop data mapping and migration strategies. Execute data migration from legacy systems to a new cloud platform. Provide recommendations on migration approach, risks, and timelines. Support successful implementation and completion of the migration project. Map the Ocella … systems. Proven ability in data mapping , including matching and transforming data between source and target systems. Experience migrating data from legacy systems to cloud-based platforms . Ability to assess data quality, identify issues, and recommend migration approaches. Desirable Skills Previous experience with iDocs Cloud migrations . ...

myGwork – the largest global platform for the LGBTQ+ business community. Please do not contact the recruiter directly. Your Role We are seeking an experienced Systems Engineer to support the design, development, and lifecycle management of complex technical systems. You will apply rigorous systems engineering practices to elicit requirements … Engage with stakeholders and specialists to understand domain requirements, business use cases, and solution architecture - Analyse complex data sets, documents, and legacy systems to inform requirements and specifications - Support epic planning and topic management through agile delivery cycles - Develop and evolve comprehensive technical documentation and business requirement ...

YOUR EXPERIENCE AND EXPERTISE Essential Experience 5+ years’ experience delivering complex technology projects within matrixed or transformation environments. Proven experience delivering enterprise platforms, reservation systems, booking systems, ERP, CRM, transactional systems or major legacy technology replacements. Experience managing projects across the full delivery lifecycle, including … discovery, design, build, integration, data migration, testing, cutover and hypercare. Strong experience managing complex integrations and dependencies across multiple systems and technology teams. Experience leading data migration activities, including planning, validation, reconciliation and cutover. Experience working in a matrixed organisational model and co-ordinating with product, engineering, architecture, data ...

DevOps Engineer to join a growing engineering capability and play a central role in shaping how AI is embedded into real, production-grade software systems . This is not a traditional people-management role . Instead, you'll lead through technical depth, architectural judgement, and delivery experience by setting … capabilities are integrated into modern software platforms. If you enjoy working where architecture, APIs, DevOps, and AI meet , and you care about building systems that are secure, operable, and genuinely useful, this role offers the chance to have real impact. What you'll be doing Your focus will ...

experienced Finance Systems Analyst with strong Sun Systems knowledge? Do you enjoy providing hands-on systems support while helping organisations navigate large-scale transformation? Are you available at short notice for an exciting interim opportunity? A large organisation is seeking a Finance Systems Analyst to join … specialist finance systems team on an initial 6-month contract . Offering predominantly remote working with occasional travel to a North London office , this is an excellent opportunity to play a key role in maintaining critical finance systems while a major ERP implementation is underway. The key responsibilities ...

mathematicians and researchers to tackle some of the most challenging quantitative problems in industry. This isn't another role maintaining legacy trading systems or optimising existing codebases. You'll be building the core technology from the ground up, developing sophisticated quantitative models and high-performance software that … silos, endless meetings or layers of bureaucracy. Instead, you'll work closely with experienced software engineers, quantitative researchers and founders to design and build systems that operate at the intersection of mathematics, machine learning and distributed computing. You'll own meaningful projects from day one, influence technical decisions ...

reusable and scalable Salesforce components. Perform code reviews and enforce development best practices. Data Migration & Integration Support data migration activities from legacy systems to Salesforce. Design and validate ETL processes and data transformation rules. Work with integration teams to implement API-based integrations. Develop and support data ...

practices. Investigate and resolve defects identified during functional, integration, migration and production testing. Support reconciliation and validation of financial calculations between legacy systems and Vault. Analyse existing product behaviour and legacy-system rules when supporting product migration. Contribute to technical design discussions and identify potential … behaviour with both technical and non-technical stakeholders. Highly Desirable Experience implementing Lending and/or Savings products. Experience migrating financial products from legacy core banking platforms onto Thought Machine Vault. Understanding of Lending and Savings concepts, including: Interest accrual and application. Repayment schedules. Fixed and variable interest ...

leading online gaming platforms. This is an opportunity to work on a large-scale, business-critical C++ platform, helping modernise legacy systems while supporting a major cloud migration programme. Role Overview Location: Remote, must be based in UK Package: £600 - £650pd Outside IR35 Duration: 3 months (Sept … modernisation programme. Refactor and modernise legacy components while maintaining stability and existing functionality. Build and enhance high-performance, low-latency, server-side systems supporting a live platform. Integrate platform services with AWS where required as part of the wider cloud programme. Use AI-assisted development tools, including ...

recruiting on behalf of a well-established organisation in the financial services sector for an experienced HRIS Analyst to join their HR Systems team. This is an exciting opportunity to become part of a collaborative team at a pivotal stage in its HR technology journey. The organisation is implementing … Workday as its core HR platform, replacing multiple legacy systems with a single, integrated solution. You'll play a key role throughout the implementation and continue supporting, developing and optimising the platform once it's live. The Role As an HRIS Analyst, you'll support the ongoing ...

Lead Data Engineer Hands-on technical leadership building data systems that actually work We're looking for a Lead Data Engineer to join an enterprise data engineering capability and play a critical role in designing, building, and improving real-world data systems . This is not a line … engineers and adjacent roles through design decisions, code, and delivery support Improve data sharing, onboarding of new data sources, and interoperability across teams and systems Introduce and evaluate new tools, patterns, and technologies where they genuinely add value - balancing innovation with pragmatism Build robust, production-grade solutions , not proofs ...

digital infrastructure provider with 100+ sites across the continent - is looking for a Data Engineer to join a major transformation programme consolidating multiple operational systems into a single target platform. You'll be at the centre of the migration workstream: building the pipelines, transformation logic, and validation frameworks that … move data from legacy systems into the new target operating platform - working closely with the Data Workstream Lead, business SMEs, and application teams. What you'll be doing: Designing and building ETL/ingestion pipelines using Microsoft Fabric (Data Factory, Pipelines, Lakehouse, Notebooks) or equivalent Azure tooling ...

business services organisation, is seeking an experienced HRIS & Payroll Programme Manager to lead a major transformation programme consolidating and standardising HR and Payroll systems across its UK business. This is a critical leadership role responsible for delivering a complex, multi-workstream programme transitioning multiple legacy systems … ensure adoption The successful candidate will have proven experience delivering end-to-end HRIS and Payroll transformation programmes in complex organisations. Strong expertise in systems such as SuccessFactors, Workday, or Oracle HCM is essential, along with deep knowledge of payroll integration, data migration, and UK payroll compliance .You will ...

business services organisation, is seeking an experienced HRIS & Payroll Programme Manager to lead a major transformation programme consolidating and standardising HR and Payroll systems across its UK business. This is a critical leadership role responsible for delivering a complex, multi-workstream programme transitioning multiple legacy systems … ensure adoption The successful candidate will have proven experience delivering end-to-end HRIS and Payroll transformation programmes in complex organisations. Strong expertise in systems such as SuccessFactors, Workday, or Oracle HCM is essential, along with deep knowledge of payroll integration, data migration, and UK payroll compliance. You will ...

enterprise-grade solutions across cloud, hybrid and on-prem environments. Working alongside experienced architects, youll help shape modern architectures connecting legacy systems with emerging technologies, including AI. This is a client-facing role with strong progression into a fully-fledged Solution Architect position. Key Responsibilities Contribute ...

help shape the future of their flagship platform. This is a genuine opportunity to build software from the ground up rather than maintain legacy systems. Working within a highly collaborative engineering team, you'll develop scalable applications using TypeScript, modern JavaScript frameworks and cloud technologies, while influencing architecture ...

developing and delivering a range of projects for clients, mainly within the financial services sector and with a focus on migrating legacy systems to AWS and introducing CI/CD pipelines and cloud deployments. You'll join a collaborative team with a focus on engineering best practice … continuous improvement of client systems; you will have lots of business and client exposure, leading projects and providing expertise. Location/WFH: There's a hybrid work from home policy with three days a week in the London, City office (or at client sites), you'll join a friendly ...

civic purpose. About the Job The Data Analyst will play a key role in supporting the University’s transition from legacy systems to Banner SaaS as part of the Student Record System (SRS) Transformation Programme. Working within the Data Architecture and Data Migration workstreams, you will … data validation, cleansing and informed decision-making ahead of migration and go-live activities. Key responsibilities include: Query, analyse and present data across multiple systems using tools such as SQL, Excel and Power BI. Develop and maintain reusable queries, reports and dashboards to support migration, validation and data quality ...

Working closely with fundraising, supporter care, finance and data teams to translate operational needs into system requirements Leading data migration planning from the legacy system (e.g. Raiser's Edge, Salesforce, Dynamics, ThankQ or similar) into the new platform, working with data leads on cleansing and mapping Coordinating ...

looking for an experienced Infrastructure Operations Engineer to lead the ongoing transformation of its Microsoft cloud estate as it moves from legacy systems to a modern Azure environment. This is a strategic and hands-on leadership role, responsible for Azure infrastructure, Microsoft 365, cyber security, networking ...