26 to 50 of 134 Legacy Systems Jobs in London

HR Systems Analyst

Hiring Organisation
Morgan Law
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
£500 - £550 per day
Public Sector organisation are seeking a HR Systems Analyst to provide technical analysis and business analysis skills on a HR Systems implementation programme. The HR System Analyst will play a key role in supporting the design, configuration and implementation of new Oracle Cloud HCM platform as part … wider transformation programme. This role will provide specialist technical expertise to help replace the current HR systems landscape with an integrated, secure and scalable Oracle-based solution to further improve the employee, manager and HR experience. Working closely with HR, IT, Finance, project resources and 3rd party specialists ...

Dynamics 365 Solutions Architect

Hiring Organisation
17918
Location
London, United Kingdom
Build workflows and automation using Power Automate. Implement plugins, custom APIs, and Dataverse extensions for advanced functionality. Integration & Extensibility Integrate D365 with external HR systems and microservices via REST APIs, and custom connectors. Manage data migration from legacy systems ensuring integrity and consistency. Optimize performance ...

Senior ML Ops Engineer

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
across our ad‐targeting, creative optimisation and advertising measurement capabilities. This position demands a hands‐on engineer with deep expertise in operationalising machine learning systems, a strong understanding of cloud infrastructure, ML lifecycle management and production monitoring. You will work closely with Data Scientists, Data Engineers and Product teams … innovative AI/ML & data‐driven product environment. 3 best things about the job Build from Zero: You're not maintaining legacy systems—you're establishing the MLOps patterns, tooling and standards that will scale with the team for years to come. AI at the Core: This ...

Solutions Architecture (Dynamics)

Hiring Organisation
Robert Walters
Location
London, South East, England, United Kingdom
Employment Type
Full-Time
Salary
£90,000 - £100,000 per annum
multi-vendor delivery environments. Knowledge of Agile delivery methodologies and modern software development practices. Desirable Experience leading enterprise application modernisation programmes. Experience delivering legacy system decommissioning initiatives. Knowledge of enterprise architecture frameworks such as TOGAF. Microsoft Azure and Dynamics 365 certifications. Experience within membership organisations, professional bodies ...

PowerApps Developer (Contract) - SC Cleared / NPPV3

Hiring Organisation
Sanderson Government and Defence
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
£375 - £520 per day
experience delivering enterprise-grade Power Platform solutions end-to-end Ability to integrate Power Platform with external APIs, Azure services, and legacy systems Experience working in secure/public sector environments highly desirable Solid understanding of application lifecycle management (ALM) within Power Platform Strong problem-solving skills ...

Lending Software- Sales Specialist

Hiring Organisation
Aurionpro
Location
City of London, London, United Kingdom
fintech. With our cutting-edge AI based lending solutions and deep domain expertise, we empower banks and financial institutions to transform legacy systems, drive automation, and accelerate growth. Position Summary We are seeking a highly motivated and results-driven Senior FinTech Lending Sales Executive to drive revenue … expand wallet share within existing clients. Solution Selling Understand customer lending workflows, pain points, and business objectives. Position digital lending solutions including: Loan origination systems (LOS) Loan management systems (LMS) Credit decisioning platforms AI-powered underwriting and risk solutions Embedded finance and BNPL solutions SME, consumer, and corporate ...

Senior Backend Engineer

Hiring Organisation
Deep Medical
Location
Greater London, England, United Kingdom
Engineer (Platform & AI Infrastructure) 📍 London · Hybrid (at least one day in office, Thursday) · [Competitive Salary] + Equity About Deep Medical Deep Medical helps healthcare systems treat more patients by recovering capacity that would otherwise be lost. Every day, appointments go unused while patients wait for care. Capacity disappears through … Senior Backend Engineer to help architect, build and scale the core platform powering Deep Medical's products. You'll work across distributed systems, healthcare data infrastructure, APIs and AI-powered services partnering closely with CS, product and machine learning teams to bring new capabilities into production. We are growing ...

Lead Data Engineer

Hiring Organisation
Lorien
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
Salary negotiable
Lead Data Engineer Hands-on technical leadership building data systems that actually work We're looking for a Lead Data Engineer to join an enterprise data engineering capability and play a critical role in designing, building, and improving real-world data systems . This is not a line … engineers and adjacent roles through design decisions, code, and delivery support Improve data sharing, onboarding of new data sources, and interoperability across teams and systems Introduce and evaluate new tools, patterns, and technologies where they genuinely add value - balancing innovation with pragmatism Build robust, production-grade solutions , not proofs ...

Back End Development Lead

Hiring Organisation
Oyster Consultants
Location
London, South East, England, United Kingdom
Employment Type
Full-Time
Salary
£60,000 - £75,000 per annum
sprint goals. Your new development will be done within a Microservices architecture, but you will also be contributing to our legacy systems while we are in the transition period. Our stack runs on Azure including Front Door, App Services, Application Insights, and App Configuration with SQL Server ...

Head of Architecture

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
standards, governance, and design patterns Driving Microsoft‐first architecture across cloud, data, integration, and business platforms Leading architecture alignment across digital, operational, and business systems Translating business strategy into scalable, secure technical solutions Acting as a trusted advisor to senior leadership on technology direction and investment Technology Landscape This … Modern Data Platforms (Azure Data Services, data governance, analytics) API‐first & event‐driven architectures Enterprise‐scale integration across SaaS and legacy systems Key Responsibilities Define and govern the architecture roadmap aligned to business priorities Lead architectural design across D365 solutions and Microsoft cloud platforms Establish best practices ...

Commercial lending BA

Hiring Organisation
Capgemini
Location
Greater London, United Kingdom
Employment Type
Full Time
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 ...

Midweight .NET Developer

Hiring Organisation
Design Portfolio
Location
Greater London, England, United Kingdom
Participate actively in code reviews, sprint planning, and retrospectives Identify and resolve defects, performance issues, and technical debt Contribute to technical documentation Support production systems and participate in on-call or incident resolution where required Requirements For this role, we are looking for a candidate with the following qualifications …/CD pipelines and DevOps practices Experience writing unit and integration tests Awareness of application security best practices Experience modernising legacy systems or working with technical debt What you'll get - Flexible hybrid working (London or Leeds) - 31.5 days' holiday – includes 2 days (16 hours) of personal ...

Lead Python Engineer

Hiring Organisation
Velocity Tech
Location
City of London, London, United Kingdom
products. With a strong reputation for solving complex technical challenges, they work with leading organisations to deliver AI-enabled solutions, modernise legacy systems, and build high-performance applications. Their teams are distributed globally and operate in a highly collaborative, engineering-led environment. The Role As a Technical ...

Technical Programme Manager - Workstream Lead

Hiring Organisation
Experis
Location
London, United Kingdom
Employment Type
Contract
delivery flow. * Support effective agile ways of working, including planning, ceremonies, prioritisation and delivery discipline. * Manage dependencies across other SAP workstreams, legacy systems, integration points, data migration activities, and third-party suppliers. * Proactively identify, manage, and escalate risks, issues, and decisions, driving timely mitigation and resolution. Assess ...

Sr. Principal Technologist, Professional Services, Product and Solutions

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
keeping abreast of the ever-widening stream of platform improvements and new services. You will pioneer new technical spaces, evolve critical legacy systems, and lead cross-company technical initiatives that fundamentally change how ProServe delivers value at scale. Deep expertise in AI/ML-driven applications, agentic … architectures, cloud-native systems at production scale, and modern DevOps practices are highly applicable. You must demonstrate exceptional written and verbal communication — your documents and presentations should serve as examples of highly effective communication that influence VP-level decision-making. Key job responsibilities Own the multi-year technical vision ...

Graduate Software/Quantitative Developer

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
your career at the intersection of technology, mathematics, and finance? Join an elite global trading firm where innovation drives everything—no legacy systems, no bureaucracy, just cutting‐edge tech and world‐class mentorship. You’ll work on greenfield projects from day one, collaborating with exceptional engineers, quants … researchers to build the systems and models shaping the future of global trading. The Role Depending on your track, you will focus on engineering high-performance systems or developing sophisticated mathematical models, all while learning how technology powers global markets. Key Responsibilities Designing and enhancing advanced trading systems ...

Principal Java Developer / Consultant

Hiring Organisation
Client Server
Location
City of London, London, United Kingdom
Employment Type
Permanent, Work From Home
developing and delivering a range of projects for clients, mainly within the financial services sector and with a focus on migrating legacy systems to AWS and introducing CI/CD pipelines and cloud deployments. You'll join a collaborative team with a focus on engineering best practice … continuous improvement of client systems; you will have lots of business and client exposure, leading projects and providing expertise. Location/WFH: There's a hybrid work from home policy with three days a week in the London, City office (or at client sites), you'll join a friendly ...

Forward Deployed Software Engineer

Hiring Organisation
Indicium AI
Location
City of London, London, United Kingdom
latest AI tools and models, partner technical teams, and early capability previews that the wider market does not. We are deploying production AI systems into the world's most complex organisations across Financial Services, Energy, and Healthcare. We exist to make AI a genuine competitive advantage for our clients … engagements at some of the most complex organisations in the UK. Technically, commercially, and in the room with engineering leaders who have built serious systems and are not easily impressed. What You Will Do Lead engagements that transform how enterprise engineering organisations build software - from discovery and assessment through ...

.Net Engineer

Hiring Organisation
Canada Life UK
Location
City of London, London, United Kingdom
Employment Type
Part Time
need Engineers to support the transformation and the future growth of the business, simplifying our IT architecture by removing our legacy systems and delivering new solutions providing market-leading services for our colleagues, customers and advisers. What you'll do The Engineer is responsible for the design … decision-making skills. Excellent time and self-management through effective planning & prioritisation of tasks Desirable Skills: Azure PaaS M-Files Experience with distributed systems (SOA, Microservices) Benefits of working at Canada Life We believe in recognising and rewarding our people, so we offer a competitive salary and benefits package ...

Lead Mulesoft Developer

Hiring Organisation
Akkodis
Location
City of London, London, United Kingdom
Employment Type
Permanent
Salary
£65000 - £72000/annum
Level 1 (Level 2 desirable) Experience delivering enterprise-scale integrations Integration experience with Salesforce, SAP, ServiceNow, AWS/Azure, databases, and legacy systems Knowledge of API security (OAuth 2.0, JWT, mTLS/SSL/TLS) Familiarity with CloudHub v2.0, Runtime Fabric, and hybrid architectures Why Apply Fully ...

Lead Mulesoft Developer

Hiring Organisation
Akkodis
Location
London, South East, England, United Kingdom
Employment Type
Full-Time
Salary
£65,000 - £72,000 per annum
Level 1 (Level 2 desirable) Experience delivering enterprise-scale integrations Integration experience with Salesforce, SAP, ServiceNow, AWS/Azure, databases, and legacy systems Knowledge of API security (OAuth 2.0, JWT, mTLS/SSL/TLS) Familiarity with CloudHub v2.0, Runtime Fabric, and hybrid architectures Why Apply Fully ...

AWS Data Engineer - SC Cleared

Hiring Organisation
Sanderson Government and Defence
Location
London, United Kingdom
Employment Type
Contract, Work From Home
Contract Rate
£480 - £490 per day
understanding of working in secure, regulated, or classified environments Ability to work effectively within structured delivery frameworks Desirable Experience with large-scale or legacy system migration to cloud Knowledge of data governance, security, and compliance in public sector environments This role offers an immediate start for the right ...

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 ...

Finance, ERP & Consolidation Programme Director

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
enabling the ongoing transformation of our agencies and functions. WPPs Finance, ERP and Consolidation Programme will consolidate and modernise WPP's finance and ERP systems onto Workday and Maconomy, supporting operational efficiency and global standardisation by transitioning from legacy systems, scaling delivery capacity, and aiming ...

Oracle Fusion Techno-Functional Consultant - Finance

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
understanding application functionality and workflows. Review and approve solution designs, configuration workbooks, and test plans. Support data integration and migration from legacy systems to Oracle Cloud. Troubleshoot issues and liaise with Oracle Support as needed. Develop custom reports and dashboards using tools like BIP and OTBI. Proven ...