1 to 25 of 139 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 ...

Regions on both direct and indirect deals, supporting them during solutioning phases as well as during critical delivery phases. Whether modernizing legacy systems or building solutions from scratch, you will apply agentic AI to transform how projects are executed end‐to‐end. What you’ll do Architect … primary language; hands‐on experience with Python, Rust, and TypeScript/JavaScript. Proven delivery experience applying agentic AI to modernise legacy systems or build new solutions. Hands‐on expertise with agentic AI frameworks such as AutoGen, Semantic Kernel, LangChain, or equivalents. Ability to apply AI agents across ...

teams, driving large‐scale modernization programs, and fostering a culture of innovation. You will be at the forefront of transforming our legacy systems into a modern, data‐enabled, and microservices‐based architecture to support our growing business needs. Key Responsibilities Technology Leadership & Strategy Define and execute … Finance, Agency Lending, or Collateral Management/Optimization is strongly preferred. Proven experience leading a successful, large‐scale technology transformation from legacy systems to a microservices‐based architecture. Education Bachelor’s or Master’s degree in Computer Science, Engineering, or a related technical field. Desired Skills Technical ...

teams, driving large-scale modernization programs, and fostering a culture of innovation. You will be at the forefront of transforming our legacy systems into a modern, data-enabled, and microservices-based architecture to support our growing business needs.**Key Responsibilities*** **Technology Leadership & Strategy:** + Define and execute … Agency Lending, or Collateral Management/Optimization is strongly preferred. + Proven experience leading a successful, large-scale technology transformation from legacy systems to a microservices-based architecture.* **Education:** + Bachelor’s or Master’s degree in Computer Science, Engineering, or a related technical field.**Desired Skills ...

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 ...

/CTO for SymphonyAI’s Supply Chain Division in EMEA, responsible for driving a multi-year transformation from legacy on-premise systems to a cloud-native, AI-first composable SaaS platform. Lead platform architecture, large engineering teams (150–300+), generative AI integration, client-facing technology engagements … based in EMEA (Paris headquarters) and includes global engineering leadership and client-facing responsibilities. Key Responsibilities Define and own the multi-year roadmap for Systems of Execution (WMS, TMS, OMS) and Systems of Intelligence (demand planning, supply optimization, decision analytics). Architect transformation from monolithic legacy ...

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 ...

build internal tools and targeted application improvements. You will thrive here if you care about pragmatic delivery, continual learning, high standards, and building systems that make the whole team more effective. This role is for someone who wants to own real systems in production, not just pipelines … production Manage and evolve infrastructure as code using Terragrunt Build and improve CI/CD pipelines using GitLab CI Debug complex issues across distributed systems, often without full visibility Help us move to our new systems from our legacy systems, paying down technical debt where ...

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 ...

environments Define, implement, and enforce robust SOPs for backups, disaster recovery, patch management, and hardware lifecycle Ensure reliable connectivity between legacy core systems and modern application platforms Oversee internal security monitoring and collaborate with external security partners (SOC/MDR) Lead incident and problem management activities, including … including incident, problem, and change management processes Experience with ITSM tools (e.g., Jira) and working within SLA-driven environments Familiarity with legacy systems connectivity (e.g., AS/400/iSeries) is highly beneficial ...

scalable, cloud‐native platforms to support critical national services. This role sits within a growing engineering function focused on modernising legacy systems, delivering microservices architectures, and embedding DevOps‐first delivery practices. We are looking for a hands‐on Lead Developer who can set technical direction, lead teams … Skills & Experience Required Core Engineering Strong experience with C#/.NET (Core, 6, 7, 8+) Deep knowledge of REST APIs, Web APIs, and distributed systems Experience building event‐driven microservices architectures Strong understanding of design patterns, SOLID principles, and clean architecture Cloud & DevOps Proven experience with Microsoft Azure ...

through large-scale production deployments. Design the target solution architecture for enterprise transformations: how Taktile integrates into the customer's existing landscape of core systems, data platforms, and surrounding services, and how that architecture evolves over a multi-year journey. Own the hardest architecture questions in our deals — integration … patterns (event-driven architectures, messaging, APIs, batch, streaming), and you know when to use which. You've worked with enterprise-grade legacy systems — core banking platforms, loan origination systems (LOSs), loan management systems (LMS), front-end SDKs, mainframes, on-prem estates — and know what ...

integral part of the Digital Engineering Services and Solutions leadership team and the department’s evolution to bridge the gap between legacy systems with modern, agile, cloud-based solutions whilst maintaining compliance and regulatory obligations**NUMBER OF DIRECT REPORTS*** Approximately 5**KEY RESPONSIBILITIES****Planning & Strategy … fully defined and met and operate to agreed service levels* Ensure accurate reporting of all KPIs/KRIs for the Digital Workplace products, systems and tooling* Identify key risks within the Digital Workplace team, assessing and mitigating those risks in accordance with the appropriate risk management framework* Ensure ...

design, build, and operate scalable data pipelines and data products, enabling a modern data mesh architecture. The role focuses on integrating legacy systems with cloud-native platforms to support analytics, reporting, and domain-owned data products. Primary Skills Strong experience with Databricks (Spark, PySpark/… engineering best practices. Key Responsibilities Build and maintain batch and streaming data pipelines from legacy mainframe DB2 and on‐prem SQL Server systems into an AWS‐based data lake. Implement real‐time ingestion using Confluent Kafka and land data in Amazon S3. Develop data transformations and analytics ...

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 ...

augmented Front End delivery. Previous NHS experience. GOV.UK Design System experience. Python development. API integration experience. Cloud migration projects. Extracting and modernising Legacy systems. Cross-organisation collaboration. Mentoring and coaching developers. ...

experience delivering enterprise-grade Power Platform solutions end-to-end Ability to integrate Power Platform with external APIs, Azure services, and legacy systems Experience working in secure/public sector environments highly desirable Solid understanding of application lifecycle management (ALM) within Power Platform Strong problem-solving skills ...

design, build, and operate scalable data pipelines and data products, enabling a modern data mesh architecture. The role focuses on integrating legacy systems with cloud-native platforms to support analytics, reporting, and domain-owned data products. Primary Skills • Strong experience with Databricks (Spark, PySpark/… engineering best practices. Key Responsibilities • Build and maintain batch and streaming data pipelines from legacy mainframe DB2 and on prem SQL Server systems into an AWS-based data lake. • Implement real-time ingestion using Confluent Kafka and land data in Amazon S3. • Develop data transformations and analytics ...

stage where their impact will be both immediate and lasting. As Technical Lead, Machine Learning , you won't be inheriting Legacy systems or maintaining someone else's architecture. You'll help define the foundations of the platform itself-shaping how the product reasons, remembers, plans, and executes … have the opportunity to: Define the machine learning architecture that powers the entire product. Influence technical strategy at the highest level. Build systems from first principles rather than work within established constraints. Solve some of the hardest challenges in AI, including memory, reasoning, reliability, and real-world task execution. ...

stage where their impact will be both immediate and lasting. As Technical Lead, Machine Learning , you won't be inheriting legacy systems or maintaining someone else's architecture. You'll help define the foundations of the platform itself-shaping how the product reasons, remembers, plans, and executes … have the opportunity to: Define the machine learning architecture that powers the entire product. Influence technical strategy at the highest level. Build systems from first principles rather than work within established constraints. Solve some of the hardest challenges in AI, including memory, reasoning, reliability, and real-world task execution. ...

world\'s largest financial institutions. You\'ll be building on a cloud-native platform with a modern technology stack, not maintaining decades of legacy systems. Move fast. We\'re one of the fastest-moving teams in the firm, with a startup mindset backed by JPMorgan\'s scale, customers ...

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 ...