1 to 25 of 53 Remote/Hybrid Legacy Systems Jobs in London

architecture across teams, helping avoid unnecessary coupling and complexity while keeping teams focused on pragmatic, high-impact solutions. Dive into complex legacy systems, identify root causes of friction, and define a clear path to modernisation Deliver high-quality, reliable production code through testing, logging, and alerting Move … leadership. Leverage AI-assisted engineering to accelerate system understanding and delivery Establish best practices, guardrails, and tooling to improve engineering velocity and safety Ensure systems are scalable, reliable, and adaptable as we grow Partner closely with Engineering and Platform You will raise our technical bar by mentoring senior engineers ...

considering: We are seeking a highly skilled Data Analyst to support client Business Transformation Programme a largescale initiative modernising core systems processes and data architecture This role will play a critical part in data migration data quality assurance and business analysis ensuring the accurate and efficient transition of legacy … Data Management Analyse and document source to target data mappings for complex migration activities Profile cleanse and validate large datasets from legacy systems Support ETL processes and transformation logic development Perform reconciliation between legacy and target systems to ensure data integrity and completeness Identify ...

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 ...

making a tangible difference every day, we'd like to hear from you. ABOUT THE ROLE As a Senior Specialist – Mission Critical Radio & Cellular Systems , you will provide technical leadership for the operational support, maintenance and continual improvement of Heathrow Airport's critical communications infrastructure. Working across a diverse … technology estate spanning legacy and modern radio systems, RF over Fibre Distributed Antenna Systems (DAS), public and private cellular infrastructure and IP-based communications platforms, you'll lead the resolution of complex technical issues while helping shape the future direction of operational communications at Heathrow. This ...

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 ...

many of the following areas:Lead the design and implementation of cloud-native data platforms.Architect and deliver data modernisation strategies, transitioning legacy systems to scalable, cloud-native solutions.Design and implement lakehouse architectures that unify data lakes and data warehouses for advanced analytics and AI/ML workloads.Partner ...

extend About the Role We’re partnering with a financial client that’s undertaking a large-scale data transformation, modernising legacy systems and building a unified analytics platform in the cloud. As part of this initiative, you’ll play a key role in developing and optimising … data models, ensuring performance, accuracy and user accessibility. Contribute to the migration of legacy SQL Server (SSIS/SSAS/SSRS) systems into a modern Snowflake/Power BI environment. Work collaboratively with business users to understand requirements, translate them into technical solutions and deliver robust, scalable ...

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 ...

most ambitious financial services programmes. They work closely with business and technology leaders to drive strategic change, from platform modernisation and core systems reengineering, to cloud adoption and integration overhaul. Your Role You’ll be part of a highly credible, expert-led team shaping complex solutions across the full … technology stack. Whether modernising legacy systems, enabling cloud-first strategies, or improving end-to-end integration, you’ll bring structure, clarity, and delivery alignment to everything you do. What You’ll Be Doing as a Solution Architect: Lead the design and implementation of end-to-end solutions ...

Developer. A hands-on role in modernising our core platform. This individual will be help in driving the migration away from Legacy systems into, cloud-native architectures, and working closely with your team to acheiuve these goals. This is new role looking for someone who has worked … GraphQL JPA, and Hibernate. *Good knowledge of message brokers (particularly AWS SQS, SNS, or Kafka). *Solid experience working with RESTful APIs, event-driven systems, and distributed architectures. Containerisation & DevOps *Hands-on experience with Docker in production environments. *Familiarity with orchestration tools such as Kubernetes (a plus). *Understanding ...

clear requirements and investment roadmaps. Lead full delivery lifecycle: discovery, design, process re‐engineering, UAT, and global rollout. Drive modernization of legacy systems, workflow automation, API‐based integration, cloud adoption, and enterprise architecture alignment. Promote data governance: data models, data contracts, lineage, and quality controls. 2. Corporate … underwriting, documentation, servicing, and monitoring processes. Proven delivery experience with complex lending platforms such as nCino, LoanIQ, ACBS, Finastra Fusion, AFS Vision, Salesforce‐based systems . Strong analytical, documentation, and policy‐to‐product translation skills. Agile experience and familiarity with credit policy, finance/ops controls, and lending data ...

trillion on benefits every year. It’s their second-largest cost after payroll — yet the entire category is still running on legacy systems and outdated assumptions. The space is primed for transformation: despite its scale, it’s been almost completely overlooked by AI-first startups. Incumbents — including … deployment, and iteration of our next-generation benefits platform features that leverage personalization, experimentation, and AI/ML methods (e.g. agents/LLMs, recommender systems, reinforcement learning) to enhance user experience in a meaningful business domain. Contribute across the tech stack : You’ll work in React (JavaScript/TypeScript ...

your career at the intersection of technology, mathematics, and finance? Join an elite global trading firm where innovation drives everything—no legacy systems, no bureaucracy, just cutting‐edge tech and world‐class mentorship. You’ll work on greenfield projects from day one, collaborating with exceptional engineers, quants … researchers to build the systems and models shaping the future of global trading. The Role Depending on your track, you will focus on engineering high-performance systems or developing sophisticated mathematical models, all while learning how technology powers global markets. Key Responsibilities Designing and enhancing advanced trading systems ...

cloud services and our infrastructure is managed with Kubernetes and Terraform. We test with Jest and Cypress, and monitor our systems with Prometheus, Grafana and Sentry. We embrace building with AI to help us deliver faster and better, and we're looking for someone who is genuinely excited … with the Head of Platform to align Manage's architecture with the wider platform vision Identify and lead progressive modernisation of legacy systems — migrating and consolidating without disrupting delivery Deliver features with security and performance in mind, embedding compliance and governance principles throughout Platform & Infrastructure Collaboration Collaborate ...

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 complian ce.You will ...

assurance of delivery quality. Specific responsibilities are as follows: Engineering Leadership & Delivery Public-facing web platforms, customer-focused channels and digital services. Internal business systems and integrations. CRM and Dynamics-based solutions. Ensure predictable, high-quality delivery against agreed roadmaps and priorities. Balance pace, quality, and sustainability … solutions. Track record of improving engineering delivery, quality, and reliability. Familiarity with cloud-based platforms and modern integration patterns. Experience modernising legacy systems pragmatically. Proven experience leading continuous improvement initiatives across a complex organisation. Experience working in complex, regulated, or mission-critical environments. Strong analytical and problem ...

Level 1 (Level 2 desirable) Experience delivering enterprise-scale integrations Integration experience with Salesforce, SAP, ServiceNow, AWS/Azure, databases, and legacy systems Knowledge of API security (OAuth 2.0, JWT, mTLS/SSL/TLS) Familiarity with CloudHub v2.0, Runtime Fabric, and hybrid architectures Why Apply Fully ...

contribute to the development of smart contracts and core components. Integration & Scaling: Define API layers, node data flows, and enterprise integration patterns for legacy systems. Security & Governance: Implement strict security best practices (key management, node communication) and define data privacy and access models (GDPR, KYC/AML compliance ...

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 ...

Markets Technology. The Role: As a Vice President in the team, you will be a hands-on engineer building and shaping next-generation AI systems for Markets. You will design and develop production-grade services and applications, primarily in Python, and help turn fast-evolving AI capabilities into scalable … fast-moving space What We’re Looking For: Strong software engineering experience, with deep hands-on expertise in Python Experience building scalable, production-grade systems rather than just prototypes Practical experience with Generative AI, LLM-based applications, or agentic systems A strong grasp of software engineering fundamentals, including ...

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 ...

configurations to ensure alignment with business requirements and best practices. Data Migration: Validate vendor and financial data migration from legacy systems to Fusion. Testing & Validation: Manage SIT and UAT, including defect management in collaboration with the SI partner. Required skills and experience Hands-on Oracle Fusion Financials … configuration experience across core modules: GL, SLA, AR, Fixed Assets, Intercompany, Cash Management, AHCS. Extensive experience in Finance/Accounting systems with R2R domain expertise. Excellent accounting background (financial close, reporting, reconciliation, IFRS awareness). Ability to own BAU support, stabilisation, and continuous improvements post go-live. Additional valued ...

significant transformation programme focused on improving data quality and implementing a new NetSuite ERP platform. This engagement sits within a broader finance and systems transformation, where the business is transitioning from multiple legacy data sources into a more structured and scalable environment. The focus is on improving … data quality, support validation processes, and ensure data is ready for migration into NetSuite. Responsibilities Profile and assess data across multiple legacy systems, identifying quality issues and gaps Cleanse, standardise, and enrich datasets to align with target system requirements Support data migration activities into NetSuite, ensuring accuracy ...

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 ...