101 to 125 of 189 Legacy Systems Jobs in London

/Regulatory Technology team within a leading global investment bank. You’ll work on business-critical regulatory reporting platforms, helping modernise legacy systems and build strategic, cloud-based data solutions used across the firm. You’ll be part of a collaborative Agile squad focused on Java services ...

/Regulatory Technology team within a leading global investment bank. You’ll work on business-critical regulatory reporting platforms, helping modernise legacy systems and build strategic, cloud-based data solutions used across the firm. You’ll be part of a collaborative Agile squad focused on Java services ...

business teams, and network teams for data requirements. Implement best practices for data governance, security, and cost management. Support migrations from legacy systems to AWS-native data lakes or Redshift. Ideal Candidate Profile 310+ years of experience in AWS Data Engineering/Support Engineering. Strong telecom domain ...

talented team on our mission to help people and businesses thrive through technology. If you love untangling hard problems, improving legacy systems, and shipping clean, tested code, you'll fit right in. Your role as a Senior PHP Software Engineer at True9: Lead the back-end - write ...

talented team on our mission to help people and businesses thrive through technology. If you love untangling hard problems, improving legacy systems, and shipping clean, tested code, you'll fit right in. Your role as a Senior PHP Software Engineer at True9: Lead the back-end - write ...

Skills:Strong understanding and ability to design integrated, scalable, and secure IT solutions for procurement and supply chain operations, often involving cloud and legacy systems. Communication:Excellent communication skills, both written and verbal, and able to effectively communicate with senior stakeholders and managing their expectations ensures projects align ...

data quality, performance, and maintainability Tech environment • Kotlin & Spring Boot for core data processing services • Python for tooling and automation • Legacy systems in C# and Scala/Spark • Exposure to data lakes and large-scale data platforms is a strong plus What they’re looking for • Strong … background (Kotlin, Java, or Scala) • Experience building or modernising data pipelines • Solid understanding of SQL and data processing systems • Comfortable working in complex, performance-sensitive environments • Financial markets or trading data experience is beneficial but not essential 6-month initial contract with potential to extend. Onsite by default, with ...

data quality, performance, and maintainability Tech environment • Kotlin & Spring Boot for core data processing services • Python for tooling and automation • Legacy systems in C# and Scala/Spark • Exposure to data lakes and large-scale data platforms is a strong plus What they’re looking for • Strong … background (Kotlin, Java, or Scala) • Experience building or modernising data pipelines • Solid understanding of SQL and data processing systems • Comfortable working in complex, performance-sensitive environments • Financial markets or trading data experience is beneficial but not essential 6-month initial contract with potential to extend. Onsite by default, with ...

migration phases Interface with Oracle Fusion data models and manage FBDI, HDL, and BICC artefacts Coordinate migration activities across multiple legacy source systems Provide leadership and guidance to technical and functional teams Identify, manage, and mitigate risks related to data quality, security, and cutover readiness Minimum Requirements … projects for Oracle Fusion Cloud Financial Management, HCM, and EPM Experience working in complex legacy environments with both Oracle and non-Oracle systems Proven experience with Oracle Master Data Management products Strong understanding of data management methodologies Excellent problem-solving, analytical, communication, and leadership skills Ability ...

migration phases Interface with Oracle Fusion data models and manage FBDI, HDL, and BICC artefacts Coordinate migration activities across multiple legacy source systems Provide leadership and guidance to technical and functional teams Identify, manage, and mitigate risks related to data quality, security, and cutover readiness Minimum Requirements … projects for Oracle Fusion Cloud Financial Management, HCM, and EPM Experience working in complex legacy environments with both Oracle and non-Oracle systems Proven experience with Oracle Master Data Management products Strong understanding of data management methodologies Excellent problem-solving, analytical, communication, and leadership skills Ability ...

migration phases Interface with Oracle Fusion data models and manage FBDI, HDL, and BICC artefacts Coordinate migration activities across multiple legacy source systems Provide leadership and guidance to technical and functional teams Identify, manage, and mitigate risks related to data quality, security, and cutover readiness Minimum Requirements … projects for Oracle Fusion Cloud Financial Management, HCM, and EPM Experience working in complex legacy environments with both Oracle and non-Oracle systems Proven experience with Oracle Master Data Management products Strong understanding of data management methodologies Excellent problem-solving, analytical, communication, and leadership skills Ability ...

table. Details of this Senior Product Designer Role: 💰 Paying up to £100,000 + bonus +Benefits 📍 London – In-office role (HQ environment) 🧑 💻 Tools: Figma systems + AI experience 🏢 Must have previous experience in financial services Key Responsibilities Improve end-to-end product design across a varied portfolio of projects … ensuring consistency across products and aligning with best practices. Advocate for modern design thinking while working within the context of older, legacy systems, helping steer transformation and influence ways of working. Collaborate with product managers, engineers, and cross-functional teams to ensure solutions are technically feasible, user ...

table. Details of this Senior Product Designer Role: 💰 Paying up to £100,000 + bonus +Benefits 📍 London – In-office role (HQ environment) 🧑 💻 Tools: Figma systems + AI experience 🏢 Must have previous experience in financial services Key Responsibilities Improve end-to-end product design across a varied portfolio of projects … ensuring consistency across products and aligning with best practices. Advocate for modern design thinking while working within the context of older, legacy systems, helping steer transformation and influence ways of working. Collaborate with product managers, engineers, and cross-functional teams to ensure solutions are technically feasible, user ...

volume digital commerce business. This role sits at the heart of the product ecosystem, shaping how products, prices, availability and rules flow through complex systems and into customer-facing experiences. Youll work on foundational capabilities rather than surface-level features, helping to create scalable, predictable systems that enable … product, API and data requirements Define scalable product models, pricing logic and configuration rules Own roadmap initiatives that reduce reliance on legacy systems APIs, Data & Integrations Partner with engineering to design and evolve API contracts, data structures and error handling Work closely with suppliers and internal teams ...

volume digital commerce business. This role sits at the heart of the product ecosystem, shaping how products, prices, availability and rules flow through complex systems and into customer-facing experiences. You’ll work on foundational capabilities rather than surface-level features, helping to create scalable, predictable systems that … product, API and data requirements Define scalable product models, pricing logic and configuration rules Own roadmap initiatives that reduce reliance on legacy systems APIs, Data & Integrations Partner with engineering to design and evolve API contracts, data structures and error handling Work closely with suppliers and internal teams ...

state management Solid understanding of frontend design: usability, accessibility, polished UI Proven experience or understanding of OIDC/OAuth flows in multi-tenant systems Security mindset (handling sensitive data, regulatory constraints) Excellent communication - able to present technical decisions to product/business stakeholders Desirable/Bonus Experience in financial … services, payments, banking or regulated environments Exposure to Next.js, Vue.js, or other JS frameworks Prior work migrating legacy systems or transforming architecture Familiarity with containerisation, microservices, AWS deployments Please apply now if this role is of interest. ...

work within a collaborative, multidisciplinary environment to design, build, and maintain high-quality digital services. The role involves contributing to both new and existing systems, supporting multiple languages and platforms, and applying strong DevOps, TDD, and modern engineering practice throughout. Key Responsibilities Develop new services using Python while supporting … existing components written in Java and .NET Work with Oracle PL/SQL to support legacy and operational systems Engineer solutions across cloud and infrastructure environments including AWS, Azure, Linux, SQL Server, Postgres, Docker, and Kubernetes Implement CI/CD pipelines using GitHub or Azure DevOps Deliver ...

work within a collaborative, multidisciplinary environment to design, build, and maintain high-quality digital services. The role involves contributing to both new and existing systems, supporting multiple languages and platforms, and applying strong DevOps, TDD, and modern engineering practice throughout. Key Responsibilities Develop new services using Python while supporting … existing components written in Java and .NET Work with Oracle PL/SQL to support legacy and operational systems Engineer solutions across cloud and infrastructure environments including AWS, Azure, Linux, SQL Server, Postgres, Docker, and Kubernetes Implement CI/CD pipelines using GitHub or Azure DevOps Deliver ...

customers, operators, and the business model itself. Key Responsibilities Designing and delivering high-leverage AI use cases end-to-end Integrating into messy legacy stacks, data sources and operational workflows Balancing fast iteration with building scalable, reusable architecture Bringing together tech, people and process to drive real adoption … data integrations Strong background building or integrating automation into operational workflows Ability to ship fast, iterate and deliver impact in ambiguous environments Experience architecting systems across data, infra, APIs and internal tools Comfortable working with legacy systems, messy data and complex processes Leadership experience: hiring, coaching ...

customers, operators, and the business model itself. Key Responsibilities Designing and delivering high-leverage AI use cases end-to-end Integrating into messy legacy stacks, data sources and operational workflows Balancing fast iteration with building scalable, reusable architecture Bringing together tech, people and process to drive real adoption … data integrations Strong background building or integrating automation into operational workflows Ability to ship fast, iterate and deliver impact in ambiguous environments Experience architecting systems across data, infra, APIs and internal tools Comfortable working with legacy systems, messy data and complex processes Leadership experience: hiring, coaching ...

lead a major tax software migration within its UK Life Tax division. Key Responsibilities Lead the end-to-end migration from a legacy tax system to a new third-party platform. Manage planning, timelines, risks, and stakeholder updates. Oversee data configuration, data take-on, and system testing ...

technical depth , gain exposure to DevOps, cloud, and observability practices, and help define how we build software at Firenze. With no legacy systems , you’ll be shaping our platform from the ground up and growing alongside a team that values mentorship, learning, and engineering excellence. Key Responsibilities … pipelines) and learn how to scale reliable delivery. Performance & Observability: Gain hands-on experience with monitoring tools and learn how to build observable systems from day one. Documentation & Developer Experience: Help create clear technical docs and reusable tooling that makes development smoother for everyone. Cross-Functional Collaboration: Partner with ...

technical depth , gain exposure to DevOps, cloud, and observability practices, and help define how we build software at Firenze. With no legacy systems , you’ll be shaping our platform from the ground up and growing alongside a team that values mentorship, learning, and engineering excellence. Key Responsibilities … pipelines) and learn how to scale reliable delivery. Performance & Observability: Gain hands-on experience with monitoring tools and learn how to build observable systems from day one. Documentation & Developer Experience: Help create clear technical docs and reusable tooling that makes development smoother for everyone. Cross-Functional Collaboration: Partner with ...

Azure DevOps. Implement Infrastructure as Code (IaC) using Terraform, or ARM templates. Integration & Governance Define integration strategies across legacy and modern systems, ensuring seamless interoperability and data consistency. Provide architectural governance and enforce best practices for cloud-native development, security, and compliance. Lead the evaluation and adoption … enterprise-level solution design. Required Skills Proven expertise in Java, J2EE, and modern frameworks. Strong experience in microservices, containerisation (Docker, Kubernetes), and messaging systems (Kafka, Azure Event Bus). Hands-on experience with Azure cloud services and DevSecOps tools. Nice to have experience in technologies and platforms like OutSystems ...

Java/Scala where needed Modelling complex datasets to enable controlled, interoperable data access Integrating data from diverse and sometimes legacy operational systems Implementing fine-grained access controls , classification rules & governance frameworks Deploying data services across cloud, hybrid, and on‐prem environments Working closely with architects, security … Commercial Java and/or Scala Advanced SQL + strong data modelling Expertise in large-scale ETL/ELT pipelines Solid understanding of distributed systems Experience across AWS, Azure, or GCP Knowledge of Docker, Kubernetes , containerisation & orchestration Familiarity with CI/CD and modern DevOps practices 🔐 Security, Defence & Government ...