76 to 100 of 200 Legacy Systems Jobs in the UK

Head of Data Engineering

Hiring Organisation
Rec3 Global Ltd
Location
West London, London, United Kingdom
Employment Type
Permanent
just write clean code yourself. Bonus Experience Nice to have, but not required: Experience building new products from scratch rather than inheriting legacy systems. Sensitive datasets in regulated industries, especially telco Data cleanrooms - Google, Snowflake or equivalent Why This Opportunity Is Worth Your Time Real architectural scope ...

Java Technical Lead

Hiring Organisation
Adecco
Location
Wembley, London, England, United Kingdom
Employment Type
Full-Time
Salary
£80,000 - £85,000 per annum
Engineering Lead who breathes engineering excellence . If you're a 10+ year Java/Spring Boot expert who is tired of bloated, unmaintainable systems and wants the authority to "fix it properly" , this is your opportunity to make a lasting impact. You will work directly with the Head … Binary stream processing Structured logging (Application Insights) Security-first development Drive a culture of clean, maintainable, production-grade code Cloud-Native Excellence Ensure all systems are built for Azure Container Apps from day one Own best practice implementation across: Stateless architecture Health check endpoints Secure secret management (Azure ...

Java Developer

Hiring Organisation
Hays Technology
Location
Reading, Berkshire, United Kingdom
Employment Type
Contract
Contract Rate
£375 - £410/day c. £410 per day
Your new company You will be joining a dynamic organisation supporting critical public sector operations, working on complex systems within a secure and highly regulated environment. Your new role As a Java Developer, you will be responsible for supporting and enhancing legacy applications, providing L3 support … Flexible remote working with structured on-site training Potential for contract extension beyond the initial term Exposure to modern technologies alongside legacy systems What you need to do now If you're interested in this role, click 'apply now' to forward an up-to-date copy ...

Software Engineer

Hiring Organisation
Rise Technical Recruitment
Location
Somerset, United Kingdom
Employment Type
Permanent
Salary
£38000 - £45000/annum Bonus + Hybrid + Training
used in demanding industrial environments, working with C#, WPF, front-end languages such as Vue.JS, Angular or React. You will collaborate with electrical and systems engineers, contribute to system architecture and support both new platform development and legacy product improvement. This role offers strong technical variety, career … supportive engineering culture. You should bring solid commercial experience, excellent understanding of SOLID principles, and confidence contributing to design discussions. Exposure to industrial systems or electronics is beneficial. This role is ideal for someone who enjoys autonomy: you will be given open technical problems, trusted to investigate and propose ...

Salesforce Engineer (Financial Services Cloud)

Hiring Organisation
Morson Edge
Location
City of London, London, United Kingdom
Employment Type
Contract
standards, contributing to solution design, and ensuring all changes are appropriately documented and controlled. You will also support integration activity between Salesforce and surrounding systems, using appropriate integration patterns to enable seamless data and process flow across the wider enterprise landscape. Strong collaboration across internal teams and external partners … Cards, DataRaptors, and Integration Procedures) will be highly advantageous, particularly in enterprise-scale implementations. Additional experience integrating Salesforce with external or legacy systems is important, along with exposure to identity and verification tools such as Onfido or Experian being a plus. Relevant Salesforce certifications, including Administrator, Platform ...

Continuous Improvement Lead

Hiring Organisation
Hays Specialist Recruitment Limited
Location
Gloucestershire, England, United Kingdom
Employment Type
Full-Time
Salary
£58,000 - £60,000 per annum
continued digital and organisational development.Technology plays a critical role in enabling frontline services and improving efficiency across the organisation with ongoing investment in systems, infrastructure, and data-driven capabilities. The environment is complex and fast-paced, requiring individuals who can balance day-to-day operational demands with longer-term … technical teams, understanding system integrations, data flows and operational constraints, while ensuring solutions are robust, secure and scalable. Experience working with legacy systems and third-party vendors, alongside an ability to oversee testing, deployment and ongoing optimisation, will be key to success in this role. Previous experience ...

Data Engineer

Hiring Organisation
Halian Technology Limited
Location
South West London, London, United Kingdom
Employment Type
Permanent
Salary
£95,000
modern data platform from the ground up. Were working with a business in the middle of a high-impact data transformationmoving away from legacy constraints towards a scalable, cloud-first architecture. Theyre looking for a Data Engineer to take a leading role in that journey. This isnt … skills in Python and SQL Hands-on experience with Databricks, Azure, and GCP/BigQuery Proven ability to work across both legacy systems and modern cloud environments Key Skills DevOps mindset you automate wherever possible and write clean, testable code Pragmatic approach focused on delivering value without ...

Solutions Architect - Integrations/ERP

Hiring Organisation
Hays
Location
Birmingham, West Midlands, United Kingdom
Employment Type
Permanent, Work From Home
Salary
£90,000
/Integration Lead to play a key role in a large scale global ERP transformation programme, a strategic initiative consolidating multiple legacy systems into a single, standardised platform.This is an exciting opportunity to shape and deliver end to end integration and solution architecture, supporting the onboarding ...

Tech Lead (SC Cleared) - Inside IR35 - up to £650 per day - 1 day in Leeds per week

Hiring Organisation
Solirius Limited
Location
Leeds, Yorkshire, United Kingdom
Employment Type
Contract
Contract Rate
GBP 650 Daily
Tooling API & Integration Patterns: Hands-on experience working with APIs, complex data access patterns, identity resolution services, and managing integration constraints across fragmented Legacy systems. End-to-End Data Flow Mapping: Proven expertise in designing and documenting secure technical workflows, specifying exactly how data moves, where business logic ...

Java Developer - Active SC, Java, Oracle WebLogic

Hiring Organisation
Hays
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
£400.0 - £425.0 per day + up to £425pd (Inside IR35)
Java Developer Active SC Clearance is essential; NPPV3 would be advantageous Strong expertise in Java 11+ with experience supporting legacy systems Proven experience with Oracle WebLogic 11gR1 or similar Experience developing and supporting PL/SQL Hands-on experience with ElasticSearch development and support Nice to have ...

Business Analyst - SAP RISE Migration

Hiring Organisation
Randstad Technologies
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
£50.00 - £67.00 per hour
without waiting to be directed. The role: You'll be embedded in a new squad focused on migrating data flows from legacy systems into SAP RISE. Your job is to own discovery end-to-end: understand the current state, define the future state, write the PRDs ...

Full Stack Developer

Hiring Organisation
Oscar Associates (UK) Limited
Location
Derby, Derbyshire, East Midlands, United Kingdom
Employment Type
Permanent
Salary
£45,000
play a key role in developing new features, building applications from the ground up, and supporting the migration of legacy systems to the latest version of .NET, including the use of containerisation. You'll also work closely with analysts and other developers to continuously improve product performance ...

Delivery Consultant - Migrations, Public Sector Professional Services - UK

Hiring Organisation
Amazon
Location
South West London, London, United Kingdom
Employment Type
Permanent
migration and modernization techniques - Application discovery and dependency mapping - Migration tooling (Application Migration Service, Database Migration Service, Migration Hub) - Cutover planning and execution - Legacy system analysis and decommissioning - Risk mitigation and rollback strategies - AWS Transform PREFERRED QUALIFICATIONS - Experience and technical expertise (design and implementation) in cloud computing technologies ...

Senior Software Engineer

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
client is a global commodity trading organisation undergoing a major technology transformation focused on AI-driven engineering, operational automation and modernisation of legacy trading platforms. They are seeking a strong hands-on technologist to join a high-profile AI and agent-driven programme focused on automating support … Commodity trading, energy trading or ETRM exposure. Experience with AI/LLM tooling including LangChain, Langfuse or Claude Code. Experience modernising legacy systems and workflows. Experience with React, Next.js, PostgreSQL, MongoDB or Kafka. #J-18808-Ljbffr ...

Public Sector - Chief Architect

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
your clients. You will be responsible for all aspects of the technical solution, including cloud native services, SaaS, bespoke development and existing legacy systems. The right candidate will be comfortable working in ‘rainbow’ teams with multiple different suppliers or as part of a wholly IBM team. Specific responsibilities ...

Senior Software Engineer

Hiring Organisation
Rise Technical Recruitment
Location
Wellington, Somerset, United Kingdom
Employment Type
Permanent
Salary
£50000 - £60000/annum Bonus + Progression + Hybrid
shaping system architecture, driving best practice, and developing robust, maintainable solutions that are relied upon by customers worldwide. You will work closely with electrical, systems, and test engineers to deliver integrated solutions, contributing across the full lifecycle from concept and design through to delivery and long term support. Backed … software architecture and design, ensuring scalable and maintainable solutions Contribute to microservice architecture and Azure based modernisation initiatives Maintain and evolve legacy systems while planning for their future development Collaborate with multidisciplinary engineering teams in an agile environment Participate in code reviews, sprint planning, and CI/ ...

Avaloq Engineer

Hiring Organisation
Fuel Recruitment
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
GBP 700 Daily
Platform ecosystem, including RM Workbench, Middleware, and digital channels Develop and maintain APIs and event-driven integrations to enable Real Time data exchange across systems Enable seamless data flows to support client 360 views, portfolio insights, and transaction processing Contribute to core banking modernisation by decoupling product and data … layers from Legacy systems Support the implementation of a dynamic operational data layer to enable Real Time data consumption Ensure data quality, consistency, lineage, and compliance with regulatory requirements Enable end-to-end wealth journeys including onboarding, financial planning, portfolio management, and trading Support straight-through processing ...

Senior C++ Programmer

Hiring Organisation
IT Search & Select
Location
Cambridge, Cambridgeshire, England, United Kingdom
Employment Type
Full-Time
Salary
£60,000 - £70,000 per annum
quality is engineered into the product. What You’ll Bring Strong expertise in modern C++ and experience working with large, legacy systems A deep understanding of refactoring, modularisation, and architectural improvement Proven experience designing and implementing robust testing frameworks Ability to improve test coverage , introduce automated tests … delivery Strong communication skills and the ability to lead and mentor a team Nice to have: Experience with multithreading, performance optimisation, or low-level systems Familiarity with Linux development environments Exposure to static analysis, sanitizers, fuzzing, or property-based testing Why Join High autonomy and ownership of a mission ...

Infrastructure/DevOps Engineer

Hiring Organisation
Method-Resourcing
Location
Cardiff, South Glamorgan, Wales, United Kingdom
Employment Type
Permanent
Salary
£45,000
Engineer, you'll be instrumental in supporting the delivery of a major Azure-based transformation project. You'll work across modern cloud platforms, legacy infrastructure, and CI/CD tooling, helping them enhance configuration management and deployment automation during this pivotal transition. What my client is looking …/CD pipelines Strong experience with Infrastructure as Code - ideally Terraform (Ansible also a plus) Hands-on understanding of Windows legacy systems Solid configuration management skills across complex environments Alongside a salary of up to £45,000, they can offer the following benefits: 10% employer pension contribution ...

SAP MDG Consultant - Data Governance & S/4HANA Expert

Hiring Organisation
Jobleads-UK
Location
Leeds, England, United Kingdom
rules for key master data domains Configure and enhance data models, UI components and workflows within MDG Support integration with SAP and non-SAP systems using IDocs, SOA services and APIs Collaborate with business stakeholders to translate data governance requirements into scalable solutions Support testing phases including … Desirable Skills for the SAP MDG Consultant: Experience within retail master data domains (Article, Store, Assortment) Integration experience with Ariba or legacy systems Experience working within large-scale, global SAP programmes Ability to support complex integration and solution design discussions If you are an experienced ...

AI Solutions Lead

Hiring Organisation
Tenth Revolution Group
Location
London, South East, England, United Kingdom
Employment Type
Full-Time
Salary
£80,000 - £100,000 per annum
working with a modern insurance business that's been built with a strong focus on technology from day one. No legacy systems, no outdated processes and no treating tech as an afterthought. They're well-funded, growing quickly and have put AI at the centre … current development processes and identifying where AI can add real value Driving prompt engineering and more modern, AI-led approaches to building and improving systems What they're looking for Experience within insurance or financial services (this doesn't need to be purely technical) Hands-on prompt engineering experience ...

NetSuite Data Migration Specialist — ETL Lead

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
NetSuite requirements Execute data loads in the correct sequence (Projects, Fixed Assets, Finance, Time) Manage data mapping, cleansing, and transformation from legacy systems Oversee data validation, reconciliation, and sign-off processes Work closely with internal stakeholders to ensure accuracy and completeness of migrated data Identify and mitigate ...

Aviation AI Strategy & Solutions Lead

Hiring Organisation
Jobleads-UK
Location
Leicester, England, United Kingdom
least 5 years of experience in AI consultancy, strong Python and SQL skills, and a passion for innovation, particularly in modernizing legacy systems in the aviation industry. #J-18808-Ljbffr ...

Azure Cloud Platform Engineer

Hiring Organisation
Devonshire Hayes Recruitment Specialists Limited
Location
Watford, Hertfordshire, England, United Kingdom
Employment Type
Full-Time
Salary
£55,000 - £60,000 per annum
Platform Engineer to design, secure, and optimise Azure environments at scale. You'll play a key role in cloud transformation, migrating Legacy systems, and driving modern data, AI, and automation capabilities. What You'll Be Doing Design and manage Azure infrastructure (compute, storage, networking, Microsoft Fabric) Lead ...

Group Head of Data and Insights

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
including building teams, developing talent, and leading through ambiguity and change. Experience working across federated or group structures, with multiple operating entities and legacy systems. Familiarity with modern analytics, data platforms and emerging techniques (e.g. advanced analytics, AI‐enabled insight), with a pragmatic understanding of their risks ...