Legacy Systems Jobs in London

76 to 100 of 165 Legacy Systems Jobs in London

Data Scientist

London, United Kingdom
Hybrid / WFH Options
Church International
Science This is a pivotal role for someone eager to grow their career, influence the direction of data science at an enterprise level, and work with legacy systems and emerging technologies. You'll bring a solid analytical background-ideally from maths, physics, or data science-and a strong track record of delivering results. This role combines technical More ❯
Employment Type: Permanent
Salary: GBP Annual
Posted:

Head of Infrastructure & Tools

London, United Kingdom
Barclays
AI to inform business strategies. Implementing technology practices in accordance with security, compliance, and regulatory requirements, and actively managing risks. Leading digital transformation projects and modernizing legacy systems to support digital solutions for customers, clients, and colleagues. Managing the technology team, including hiring, training, mentoring, and resource allocation. Managing technology budgets, prioritizing resources, optimizing costs, and mitigating More ❯
Employment Type: Permanent
Salary: GBP Annual
Posted:

Senior Manager-Digital Product Operations

London, United Kingdom
Americanexpress
earn and redeem rewards, enjoy travel perks, and access partner benefits across channels and geographies. We are in the midst of a major transformation-modernizing our legacy systems to a scalable, resilient, and configurable platform that powers the next generation of loyalty experiences. This year marks a critical phase in that journey, and we are looking for More ❯
Employment Type: Permanent
Salary: GBP Annual
Posted:

Senior Integration Engineer - Enterprise Applications

London, United Kingdom
Hybrid / WFH Options
Bauer Media Outdoor
mind. What You'll Be Doing Build New Solutions: Design, develop, and lead secure, scalable applications from concept to deployment. Collaborate with stakeholders to ensure alignment with business goals. Systems Integration: Develop and support integrations across internal and third-party platforms using APIs, middleware, and event-driven architecture. Modernise legacy systems and promote modular, reusable designs. … someone who can bring a flexible, solution-oriented mindset and has experience working across different environments and systems. Ideally, you will have: Experience integrating with a range of business systems and platforms Hands-on experience building business applications from the ground up (e.g. D365, SAP, stock management solutions) A good understanding of Microsoft Power Platform (Power Apps, Power Automate … The ability to adapt quickly, switch contexts, and work comfortably across different teams and technologies Integrating with platforms like Dynamics 365, SAP, HR systems or third-party SaaS tools Collaborating with senior stakeholders to translate business needs into technical delivery Taking ownership of solutions with a view to long-term usability, scalability, and impact What Success Looks Like More ❯
Employment Type: Permanent
Salary: GBP Annual
Posted:

Senior HRIS Technical Analyst

London, United Kingdom
Method-Resourcing
thrilled to be partnering with a global leader in the travel services and benefits sector. They're looking for a Senior HRIS Technical Analyst to join the Global Business Systems division. In this hands-on technical role, you'll serve as a trusted expert on HR systems and a critical support partner to the HR team, with a … system operations, enable greater automation, and play a pivotal role in advancing our HR technology landscape. Key Responsibilities: Act as the technical subject matter expert for Workday and HR systems Maintain and enhance system integrations using EIB, Workday Studio, Web Services (REST, SOAP), and related APIs Provide 2nd and 3rd line support, translating business needs into technical solutions Explore … transformation Proficiency in Excel and solid SQL/data reporting skills Knowledge of data privacy and compliance in HRIS environments Experience with Workday data conversion from legacy systems (desirable) If you're an experienced Senior HRIS Technical Analyst looking to drive innovation and mentor a high-performing team, apply today or send your CV to Please note More ❯
Employment Type: Permanent
Salary: £80,000
Posted:

Senior HRIS Technical Analyst

London, South East, England, United Kingdom
Method Resourcing
thrilled to be partnering with a global leader in the travel services and benefits sector. They're looking for a Senior HRIS Technical Analyst to join the Global Business Systems division. In this hands-on technical role, you'll serve as a trusted expert on HR systems and a critical support partner to the HR team, with a … system operations, enable greater automation, and play a pivotal role in advancing our HR technology landscape. Key Responsibilities: Act as the technical subject matter expert for Workday and HR systems Maintain and enhance system integrations using EIB, Workday Studio, Web Services (REST, SOAP), and related APIs Provide 2nd and 3rd line support, translating business needs into technical solutions Explore … transformation Proficiency in Excel and solid SQL/data reporting skills Knowledge of data privacy and compliance in HRIS environments Experience with Workday data conversion from legacy systems (desirable) If you're an experienced Senior HRIS Technical Analyst looking to drive innovation and mentor a high-performing team, apply today or send your CV to Please note More ❯
Employment Type: Full-Time
Salary: £70,000 - £80,000 per annum
Posted:

LEAD Developer (TALL Stack) High-Growth SaaS

South West London, London, United Kingdom
Hybrid / WFH Options
Robert Half
team , directly shaping products used by thousands. Expect fast releases, ownership of features, and the chance to genuinely influence direction. Projects You'll Work On: Rebuilding legacy systems using Laravel & Vue.js Driving adoption of the full TALL stack (Tailwind, Alpine.js, Laravel, Livewire) Building new customer-facing tools, portals, and automation features Improving performance and scalability across high … traffic systems Supporting a long-term product roadmap across multiple business units The Stack: PHP (Laravel) Tailwind, Alpine.js, Livewire Vue 2 & 3 Agile/CI/TDD mindset The Setup: Hybrid - 3 days in-office for collaboration and 2 days from home (more flex offered) 3-stage interview process and super quick turnaround Competitive salary + bonus 25 days More ❯
Employment Type: Permanent, Work From Home
Posted:

Software Engineer

London, South East, England, United Kingdom
Morgan McKinley
Software Engineer - FinTech/Compliance Systems A leading organisation is seeking a Software Engineer to join its fast-paced technology function, focused on developing secure, scalable and compliant systems that support complex regulatory requirements and partner onboarding experiences. This is an exciting opportunity to work at the intersection of technology, risk management and innovation, building next-generation systems … Work with cross-functional teams to understand requirements and implement automated solutions Solve complex technical problems with a strong customer-centric focus Help automate and modernise legacy systems to reduce manual intervention and increase resilience What You'll Bring: Experience in backend software development Proficiency in Java and at least one other server-side programming language Experience … with microservices architecture and distributed systems Strong understanding of data storage technologies (MySQL, Hadoop, Cassandra) Familiarity with AWS services such as RDS, Step Functions and Kinesis (preferred) Experience with unit, integration and end-to-end testing frameworks Ability to define and monitor SLOs/KPIs and contribute to architecture design Exposure to regulatory processes or FinTech/payments Understanding More ❯
Employment Type: Contractor
Rate: £600 - £650 per day
Posted:

Site Reliability Engineer

London, United Kingdom
Hybrid / WFH Options
ZILO
truly flexible and designed to transform any business at scale. We've created a unified platform that adapts to diverse needs, offering the scalability and reliability legacy systems simply can't match. At ZILO, our DNA is built on Character, Creativity, and Craftsmanship. We face every challenge with integrity, explore new ideas with a curious mind, and … the front line when issues affect our users and services. This is a high-impact role ideal for someone who thrives in a modern DevOps culture, cares about both systems uptime and customer experience , and is comfortable working across infrastructure and application layers. Key Responsibilities ️ Infrastructure Reliability & Operations Own patching, upgrades, and maintenance of AWS and EKS infrastructure Define … Datadog) Partner with security teams on compliance and vulnerability remediation ️ Chaos Engineering & Resilience Design and execute Chaos Engineering experiments. Develop and track SLOs, SLIs, and error budgets for critical systems Conduct resilience reviews and game days to validate system behavior under failure Kafka & Eventing Ensure Kafka clusters are optimally configured for performance and durability Support producers/consumers and More ❯
Employment Type: Permanent
Salary: GBP Annual
Posted:

Staff Software Engineer

London, United Kingdom
Hybrid / WFH Options
eBay Inc
Join us to make an impact on one of the world's largest e-commerce websites. The team is a backend team building internal and external APIs, enterprise distributed systems, services. Our teams operate a DevOps philosophy. You, together with the rest of your team, support in production what you build. We value delivery to production, getting data/… domain Requirements To be considered for this role, you must have 10+years of experience in software development, 5+years of experience with software design and architecture, running large scale distributed systems in production environments. You must have significant commercial experience and a passion for working in: Java Spring Boot Developing and using enterprise APIs Various testing methodologies System design at … and have mentoring experience. Maturity : You understand the necessity of the engineering vs business balance and are able to compromise efficiently. You are not afraid of legacy systems and know how to deal with them and when. You plan just right according to a situation and not too much or too little. Sensible approach when it comes More ❯
Employment Type: Permanent
Salary: GBP Annual
Posted:

Partner Solution Architect, UK & Ireland - Data & AI

London, United Kingdom
Microsoft
optimization of cloud solutions, enhancing partner satisfaction and solution performance, to maximize the value of partner cloud investments and adapt efficiently to challenges. Transition Partners from Legacy Systems - Facilitate smooth transitions to modern cloud environments, improving efficiency and reducing operational risks for partners, helping them stay competitive by leveraging the latest technologies and cloud best practices. Partner … UK & I area. Qualifications Required: Bachelor's Degree in Computer Science, Information Technology, Engineering, Business, or related field AND experience in cloud/infrastructure technologies, IT consulting/support, systems administration, network operations, software development/support, technology solutions, practice development, architecture, and/or consulting. OR equivalent experience. OR master's degree in related fields with technical consulting More ❯
Employment Type: Permanent
Salary: GBP Annual
Posted:

Data Analyst

London, United Kingdom
Hybrid / WFH Options
Salt Digital Recruitment
year transformation programme across core service areas including Adult Social Care , Children's Services , and Housing . This programme is data-led and insight-driven, aiming to modernise outdated systems, improve service delivery, and foster a culture of continuous improvement. We are seeking two experienced Data Analysts to support this work as part of a dynamic internal consultancy team. … within services, working hands-on with real data challenges to inform critical decisions and reform frontline delivery. KEY RESPONSIBILITIES Cleanse, validate, and restructure complex datasets from legacy systems (e.g. Liquid Logic, NEC, Jigsaw, Academy) Create clear, visual dashboards and performance reports using Power BI Collaborate across housing, social care and children's services to support redesign of … frontline services Link and reconcile data from disconnected systems to provide accurate, meaningful insights Coach non-technical staff to build internal understanding and capability in data usage Support service leaders in making informed decisions around resources, costs, and delivery models Essential Skills & Experience MUST have recent experience in Local Government or Council settings (Experience with public sector consultancies working More ❯
Employment Type: Permanent
Salary: GBP Annual
Posted:

Staff Software Engineer

London, United Kingdom
Hybrid / WFH Options
Lunar
revolutionize healthcare with cutting-edge, AI-powered software designed to help every hospital deliver world-class care for their patients. Our platform is already the core backbone of health systems today, transforming clinical and operational workflows at scale with the world's first AI-native hospital information system. This next-generation platform is a fundamental rebuild of the information … love to talk. Here are some deep technical problems you may tackle in your first 6 months: Modern cloud architecture, built from scratch : We have no legacy systems to untangle. We're designing a modern cloud-native platform with Elixir at its core. Develop a radically better access control system for clinical data : Create a modern access More ❯
Employment Type: Permanent
Salary: GBP Annual
Posted:

Staff Software Engineer (Backend)

London, United Kingdom
Hybrid / WFH Options
eBay Inc
Join us to make an impact on one of the world's largest e-commerce websites. The team is a backend team building internal and external APIs, enterprise distributed systems, services. Our teams operate a DevOps philosophy. You, together with the rest of your team, support in production what you build. We value delivery to production, getting data/… and have mentoring experience. Maturity : You understand the necessity of the engineering vs business balance and are able to compromise efficiently. You are not afraid of legacy systems and know how to deal with them and when. You plan just right according to a situation and not too much or too little. Sensible approach when it comes More ❯
Employment Type: Permanent
Salary: GBP Annual
Posted:

Senior Frontend Engineer - Trading React & Typescript

London, South East, England, United Kingdom
Robert Walters
are well-architected, scalable, and integrate seamlessly Collaborate effectively with cross-functional teams-including traders, backend engineers, and product managers Contribute actively to the decommissioning of legacy systems by facilitating the adoption of strategic technologies Engage regularly with business stakeholders to gather requirements, provide technical guidance, and ensure that delivered solutions address real-world challenges faced by More ❯
Employment Type: Full-Time
Salary: £70,000 - £85,000 per annum
Posted:

Software Engineer, AI/ML

London, United Kingdom
Ecm Selection
Established companies have legacy systems and software that require years' experience to use it well or a bookshelf of manuals to operate it. When these systems are no longer fit-for-purpose, the usual response is to hire an IT consultancy on a slightly better system, but is there another way? This growing start-up is More ❯
Employment Type: Permanent
Salary: GBP Annual
Posted:

Software Engineer, AI/ML

London, United Kingdom
ECM Selection (Holdings) Limited
Improving productivity in industry through ML based software development Established companies have legacy systems and software that require years' experience to use it well or a bookshelf of manuals to operate it. When these systems are no longer fit-for-purpose, the usual response is to hire an IT consultancy on a slightly better system, but More ❯
Employment Type: Permanent
Salary: £70000 - £110000/annum + benefits
Posted:

S/4HANA Data Migration Lead - Local Gov

London, United Kingdom
IO Associates
SAP S/4HANA ERP implementation within a UK local authority. *Local Government experience is essential* This role is critical to ensuring a smooth migration from legacy systems, with a strong emphasis on public sector data governance and stakeholder collaboration. Key Responsibilities: Lead the full data migration lifecycle for a local authority ERP programme Design and execute More ❯
Employment Type: Contract
Posted:

Catastrophe Modelling Analyst - 28866

London, United Kingdom
The Emerald Group
but not limited to): To assist with quality checks of exposures cleansed via the AI platform for all Property and Marine classes To assist with the backfilling of legacy system accounts into the new automated platform, Touchstone and Analyze Re To assist with Cat modelling/data capture processes, maintaining up-to-date documentation. To ensure exposure data More ❯
Employment Type: Permanent
Salary: GBP Annual
Posted:

ServiceNow Architect

London, United Kingdom
Robert Walters
maintain a CSDM-compliant data strategy. You'll support the client through the go live and business adoption stage. Key Responsibilities: Be apart of the delivery of a legacy system upgrade and supporting clients through the go live stage and business adoption. Develop and implement a Common Service Data Model (CSDM)-compliant data strategy. Define and execute technology More ❯
Employment Type: Permanent
Posted:

ServiceNow Architect

London, United Kingdom
Robert Walters
maintain a CSDM-compliant data strategy. You'll support the client through the go live and business adoption stage. Key Responsibilities: Be apart of the delivery of a legacy system upgrade and supporting clients through the go live stage and business adoption. Develop and implement a Common Service Data Model (CSDM)-compliant data strategy. Define and execute technology More ❯
Employment Type: Contract
Rate: £650 - £850 per day + Inside IR35
Posted:

Head of Engineering

London, United Kingdom
Barclays
kept current. Implementation of work in accordance with policies and controls and are actively managing risks. . Digital transformation/change projects, programmes and initiatives, modernising legacy systems new and enhanced digital solutions to enable customers, clients and colleagues Management of the technology team includes hiring, training, mentoring, and setting and achieving team goals and ensuring that More ❯
Employment Type: Permanent
Salary: GBP Annual
Posted:

Head of Technology Value & Insight

London, United Kingdom
Marks & Spencer Plc
with the ability to engage and manage diverse teams and partners to drive shared outcomes. Significant experience in programme or portfolio management within IT, ideally involving application decommissioning, legacy system migration, or similar transformation initiatives. Everyone's welcome We are ambitious about the future of retail. We're disrupting, innovating and leading the industry into a more conscientious More ❯
Employment Type: Permanent
Salary: GBP Annual
Posted:

Lead PMO

London Area, United Kingdom
Albany Beck
Overview: Albany Beck is seeking a dynamic and experienced Lead PMO to support a major investment bank in delivering a high-impact, fast-paced change programme replacing a legacy core banking system. This role is ideal for someone with a strong background in PMO who thrives in environments with evolving processes and limited structure. If you’re hands More ❯
Posted:

Lead PMO

City of London, London, United Kingdom
Albany Beck
Overview: Albany Beck is seeking a dynamic and experienced Lead PMO to support a major investment bank in delivering a high-impact, fast-paced change programme replacing a legacy core banking system. This role is ideal for someone with a strong background in PMO who thrives in environments with evolving processes and limited structure. If you’re hands More ❯
Posted:
Legacy Systems
London
10th Percentile
£55,050
25th Percentile
£60,313
Median
£77,500
75th Percentile
£95,000
90th Percentile
£105,000