1 to 25 of 122 Permanent 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 ...

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 ...

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 ...

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 ...

Technology portfolio; translate business intent into a concrete, milestone-driven execution roadmap with measurable outcomes* Develop architecture blueprints and end-to-end systems design for Generative AI and agentic workflows across diverse operational domains* Build the shared AI platform — reusable models, tooling, guardrails, evaluation frameworks, and accelerators — that reduces … prompt engineering, retrieval-augmented generation (RAG), vector database design, and evaluation methodologies. You understand how models behave in production, not just in demos.* Agentic Systems Design:Proven experience designing and deploying multi-agent architectures and orchestration frameworks (e.g., LangGraph, AutoGen, CrewAI); tool-use patterns, human-in-the-loop workflows ...

shipped production‐grade platforms: the reusable foundations, tools, infrastructure, and workflows that help other teams shift faster and more reliably Taken AI and agentic systems from prototype to production, with a strong understanding of infrastructure, authentication, and observability Delivered on high‐stakes consulting engagements across multiple language paradigms, stacks … record of understanding, assessing, and embracing new tooling and trends within the software industry Built or integrated AI/ML features into products and systems, including recommendation engines, NLP, computer vision, predictive analytics, RAG pipelines, and agents Successfully led modernisation and replatforming efforts to align legacy systems ...

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 ...

invoice volume and growing fast. We're building the AI-powered revenue platform for modern finance teams, replacing fragile spreadsheets and legacy systems with software their teams love using. Cognition, incident.io, MoonPay, and 100+ other high-growth companies trust us to handle their entire revenue cycle across … public changelog. You should apply if You're a builder who wants to solve problems end-to-end: You've shipped LLM-based systems to real customers and have first-hand experience with how they fail in production. You've designed agentic systems and have informed views ...

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 ...