1 to 25 of 191 Permanent Legacy Systems Jobs in the UK

Prime Brokerage Developer VP – FX Prime Role Overview Hands‐on technical implementation of FX trading systems Work with teams across FX Technology to implement solutions that benefit the business Drive the design and development of system architecture, engage with end‐users, and enhance the quality of deliverables Contribute … responsibility Key Skills and Experience Required Proven understanding of FX (highly preferred) Understanding of low‐latency development practices Proven track record of building new systems, replacing legacy systems, and renovating existing systems Systems (software, hardware, networks) knowledge required to define solutions and troubleshoot issues ...

architecture roles are advisory. This one has teeth. Our client is on a genuine platform transformation journey, moving away from complex legacy systems toward a modern, cloud-native architecture,and they need someone who can lead that charge technically and culturally. If you've ever wanted real … outcomes. What you'll be doing: Architecture & Platform Modernisation Define and own the target architecture, leading the transition from legacy systems to modern, cloud-native platforms Drive the decomposition of monolithic systems into modular services, APIs, and event-driven components Collaborate with frontend and backend leaders ...

teeth About the Company Our client is a technology organisation on a genuine platform transformation journey, moving away from complex legacy systems toward a modern, cloud-native architecture. Operating at significant scale, they work with multiple engineering teams across Belfast and international sites, and are investing heavily … lead change, not just recommend it. Key Responsibilities Architecture & Platform Modernisation Define and own the target architecture, leading the transition from legacy systems to modern, cloud-native platforms Drive the decomposition of monolithic systems into modular services, APIs, and event-driven components Introduce modern engineering practices ...

efficient data ecosystem, playing a key part in bridging Data, IT Security, and Business Strategy. Youll lead the move away from legacy systems, embedding a modern lakehouse approach and ensuring our data operations are production-ready, governed, and built to scale. You will: Design and implement … lineage, and cataloguing tools Solid understanding of IT security principles (IAM, network controls, secure architecture) Experience leading large-scale migrations from legacy systems to cloud platforms The ability to translate complex technical challenges into clear, business-focused insights A passion for raising engineering standards and mentoring others ...

complex datasets? This is an opportunity to join a growing data team supporting multiple clients, playing a key role in migrating legacy systems to modern platforms while ensuring data integrity and continuity. You'll work closely with engineers, analysts, and stakeholders to deliver reliable, high quality data … build data integration solutions using SSIS * Write and optimise SQL (T-SQL) for data transformation and retrieval * Support migration from legacy systems to a modern database platform * Automate data processes and improve existing workflows * Collaborate with internal teams and external stakeholders on data delivery * Contribute to database ...

complex datasets? This is an opportunity to join a growing data team supporting multiple clients, playing a key role in migrating legacy systems to modern platforms while ensuring data integrity and continuity. You'll work closely with engineers, analysts, and stakeholders to deliver reliable, high quality data … build data integration solutions using SSIS * Write and optimise SQL (T-SQL) for data transformation and retrieval * Support migration from legacy systems to a modern database platform * Automate data processes and improve existing workflows * Collaborate with internal teams and external stakeholders on data delivery * Contribute to database ...

hub. This role is designed for a technical visionary capable of navigating large-scale enterprise environments while leading the transition from legacy systems to cloud-native, microservices-based architectures. As a Lead, you will bridge the gap between complex requirements and technical execution, taking direct responsibility … offshore development team of 20+ members, ensuring delivery excellence and code quality. Cloud Transformation: Lead the transition of hosting platforms from legacy systems to Kubernetes-based environments on GCP or AWS. Full-Stack Delivery: Architect and maintain robust, scalable applications using Java 17+ and Angular. Data Modernization ...

Start Available Are you a Laravel Developer looking for a role where you can make a genuine impact across modern platforms and business-critical systems? We're recruiting on behalf of a growing and forward-thinking business seeking a Mid-Level Laravel Developer to join their expanding tech team … based onsite in Crewe. This is an exciting opportunity for a developer who enjoys both building new applications and modernising legacy systems, while working closely with operational teams and stakeholders across the business. You'll become the onsite technical representative for the central IT team, playing ...

confidently govern third-party delivery to high standards. The Role You'll play a key role in designing and shaping scalable, resilient systems across e-commerce and integration platforms. Working closely with internal teams and external vendors, you'll ensure solutions are robust, secure, and aligned with long-term … third-party code and architecture to ensure adherence to defined standards and best practices. Integration Leadership: Lead complex data integrations between legacy systems and modern API-driven middleware environments. Problem Resolution: Investigate recurring system issues (e.g. performance, errors, data inconsistencies) and implement sustainable, long-term solutions. Documentation ...

delivering FX technology in support of our #1 FX business.**Role Overview/What will you do:*** Hands on technical implementation of FX trading systems* The successful candidate will work with teams across FX Trading Technology implement solutions that benefit the business* The role does not involve budget responsibility … Drive the design and development of system architecture, work with end-users of the systems, and enhance the quality of deliverables Ensure staff follows Citi documented policy and procedures as well as maintain desktop procedures and supporting documentation for filings on a current basis and in comprehensive manner* Contribute ...

delivering FX technology in support of our #1 FX business. Role Overview/What will you do Hands on technical implementation of FX trading systems The successful candidate will work with teams across FX Trading Technology to implement solutions that benefit the business The role does not involve budget … responsibility Drive the design and development of system architecture, work with end-users of the systems, and enhance the quality of deliverables. Ensure staff follows the company documented policy and procedures as well as maintain desktop procedures and supporting documentation for filings on a current basis and in comprehensive ...

Payments to define and then implement solutions Develop against an evolving system architecture using an AI‐First approach, working with end‐users of the systems, and enhancing the quality of deliverables Follow best practices and processes for the department and support transparency and consistency within immediate team … contact with sales or trading business teams is required Demonstrable understanding of FX products is preferred Proven track record of developing aspects of new systems, migrating legacy systems and renovating existing systems The candidate will have a strong systems (software, hardware, networks) knowledge required ...

Spring Boot, AWS Serverless (Lambda/Node.js) and Ruby on Rails with React Define integration patterns between modern services and Legacy Mainframe systems, supporting incremental modernisation Remain hands‐on with code: contributing to critical paths, conducting code reviews, and pairing with engineers Own the technical roadmap … ends, or comparable full‐stack experience and the ability to lead teams using these tools Strong grasp of integration patterns with Legacy systems (mainframe, ESB, message‐based, batch) and incremental modernisation strategies Solid understanding of secure‐by‐design principles, OWASP risks, and engineering for high‐assurance environments ...

Spring Boot, AWS Serverless (Lambda/Node.js) and Ruby on Rails with React Define integration patterns between modern services and Legacy Mainframe systems, supporting incremental modernisation Remain hands-on with code: contributing to critical paths, conducting code reviews, and pairing with engineers Own the technical roadmap … ends, or comparable full-stack experience and the ability to lead teams using these tools Strong grasp of integration patterns with Legacy systems (Mainframe, ESB, message-based, batch) and incremental modernisation strategies Solid understanding of secure-by-design principles, OWASP risks, and engineering for high-assurance environments ...

scale. They're building a modern, cloud-native backend to support their growth, and their engineering team is focused on doing things properly - clean systems, strong practices, and pragmatic decision-making. With an ESOP scheme on the table, this is a business that wants its engineers to grow with … well beyond hands-on Java development - you'll be mentoring engineers, defining long-term architectural direction, and leading the decomposition of legacy systems into modern, decoupled services. The right person is a pragmatic engineer who loves clean systems, builds for scale, and takes genuine satisfaction from ...

data architecture. You will be responsible for helping shape Logical and Canonical Data Models (LDM/CDM), supporting the migration of legacy systems into a modern, scalable data environment and building high performance integration solutions across multiple business systems. The role is responsible for ensuring the optimal … ROLE AND RESPONSIBILITIES Collaborate with the Data Architect to design and deploy LDMs and CDMs, facilitating the decoupling of legacy core systems from modern SaaS endpoints Design, deploy, and monitor event-driven integration patterns using Azure Logic Apps, Functions, and Service Bus to manage transactional data ...

Architect to shape the technology behind our Gas & Power Trading International (GPTI) business. This role sits across the full trading landscape from front-office systems to back-office processing, data platforms, integrations and infrastructure. Youll take ownership of the technology roadmap, with a strong focus on the Endur … technology is aligned, scalable and fit for the future. Youll play a key role in modernising our estate moving from legacy systems to more cloud-based and hybrid solutions while keeping performance and reliability at the level required for real-time trading. Were also looking for someone ...

benefit the business. The role does not involve budget responsibility. Drive the design and development of system architecture, work with end‐users of the systems, and enhance the quality of deliverables. Ensure staff follows Citi documented policy and procedures as well as maintain desktop procedures and supporting documentation … Skills and Experience Required Proven understanding of FX highly preferred. Understanding of ultra low‐latency development practices. Proven track record of building new systems, replacing legacy systems and renovating existing systems. Systems (software, hardware, networks) knowledge required to define solutions and troubleshoot issues. Exceptional communicator ...

position is available at the Belfast site for an IT in OT Specialist. You will plan and carry out activities to ensure the information systems inside production assets are well serviced, taking responsibility for IT deployment, machine software configuration, validation, scheduled maintenance and IT reactive maintenance - as well … upgrade and disposal of IT business owned software, business owned information systems hardware, business owned IT network devices as well as business owned operating systems. The IT in OT Specialist will play a key role in ensuring the Cyber Security of the Belfast site industrial assets. Additionally, and specific ...

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 … enabling AI within modern, API-first software platforms, particularly where legacy or existing systems need to evolve to support new capabilities safely and effectively. You will: Provide technical leadership across AI-enabled software and DevOps engineering teams Set architectural direction for API-first design, system integration ...

includes: Oversight of infrastructure, networks, cloud services, and business-critical applications, ensuring secure and reliable operations. Support for both legacy and modern systems, including ERP, CRM, Sage, Microsoft 365, and specialist software. Management and liaison with external providers, contractors, and internal teams to deliver IT solutions, support … user provisioning, group policies, account decommissioning, and organisational structure management. Configure and manage VLANs, switches, routers, firewalls, and wireless networks. Administer and support telephony systems, including Avaya onsite PBX, VoIP services, and phone recording/information requests. Provide support for audio-visual equipment, conferencing systems, and meeting room ...

summary The role is responsible for shaping and delivering a unified digital and innovation strategy, modernising legacy systems, and embedding a culture of digital excellence across the organisation. The role will ensure strong governance, cyber security, risk management, and supplier partnerships, while aligning IT investment to organisational … delivery of a robust technology strategy and enabling organisation-wide digital transformation. The postholder will oversee IT operations, digital services, and business intelligence, ensuring systems and infrastructure in place to support efficient, high-quality, and sustainable patient services. About us PML is a successful not-for-profit ...

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 ...

teams’ most powerful ideas. As part of our engineering team, you’ll shape the platforms and tools that drive high‐impact research – designing systems that scale, accelerate discovery and support innovation across the firm. We are looking for an experienced Development Manager to lead two strategically important engineering groups … Infrastructure (EI): Security Automation Engineering (SAE) – the development arm of the Cyber Security Incident Response Team (CSIRT), responsible for building automated detection and response systems; Enterprise Infrastructure Application Development (EIDev) – a new and growing team responsible for building secure, scalable applications and services for G‐Research’s corporate domain. ...

ownership of the technical foundations of our data platform – from ingestion and infrastructure to deployment – helping us move from legacy, on-premise systems to a modern, cloud-first data architecture. Working closely with the BI & Data Lead and an Analytics Engineer, you’ll be the primary architect … turning fragmented legacy data into a competitive, AI-ready asset. If you enjoy building things from the ground up, modernising complex systems, and shaping how data is used across a business, this role offers real ownership and influence. The Role - Data Engineer Designing a greenfield data platform ...