1 to 25 of 42 Legacy Systems Jobs in the South East

Business Systems & Applications Engineer

Hiring Organisation
Orion Electrotech Automation
Location
South East, United Kingdom
Employment Type
Permanent, Work From Home
Business Systems and Application Engineer Permanent Milton Keynes Hybrid working Were supporting a leading SME engineering organisation that specialises in complex, high value electromechanical systems for naval and defence platforms. Theyre looking to appoint a driven Business Systems and Application Engineer to help drive digital transformation … operational efficiency across the business. Key Responsibilities Own and manage core business systems and integrations Build Power Apps for data capture and operational workflows Automate processes using Power Automate Develop Power BI dashboards, reports and KPI displays Integrate data across multiple systems (SQL, SharePoint, Dataverse, APIs, legacy ...

LogiInfo Specialist

Hiring Organisation
Tenth Revolution Group
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
£350 - £500 per day
experienced engineer who possesses hands-on LogiInfo web application development expertise and is eager to play a vital role in transforming legacy systems into contemporary solutions. In this role, you will be crucial in understanding the existing application framework and ensuring a successful transition … application development.- Solid understanding of application architecture, backend services, and data management principles.- Proven ability to analyze and document legacy systems effectively.- Excellent communication skills for collaboration across technical and non-technical teams.- Experience with custom-built platforms and modern web stacks is a plus.If ...

Software Engineer

Hiring Organisation
Technify Talent
Location
Guildford, England, United Kingdom
active role in shaping the next generation of our platform. This is an ideal opportunity for an engineer who enjoys working with complex systems, values clean and maintainable code, and is motivated by meaningful technical challenges. Key Responsibilities Design, build, test, and deliver new features within a desktop-based … grounding in software engineering principles and best practices Experience working within large or complex codebases Demonstrated ability to refactor and improve legacy systems Excellent debugging and problem-solving capabilities Experience with real-time or multi-threaded applications Proficiency in C/C++ and C# Personal Attributes Clear ...

Product Lead - Billing Migration (Commercial Banking)

Hiring Organisation
Lorien
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
Salary negotiable
play a pivotal role. This is a high-impact position where you'll lead the end-to-end migration from legacy billing systems to a modern, scalable platform , while owning the digital billing experience across customer channels. You'll sit at the intersection of product, technology … billing migration strategy and execution Own the migration roadmap, including dependencies, risks, and key milestones Oversee transition from legacy systems with minimal/no customer disruption Ensure pricing integrity, service continuity, and regulatory compliance throughout Proactively resolve product, billing, and integration challenges Digital Product Ownership Own billing ...

Lead AI DevOps Engineer

Hiring Organisation
Lorien
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
Salary negotiable
DevOps Engineer to join a growing engineering capability and play a central role in shaping how AI is embedded into real, production-grade software systems . This is not a traditional people-management role . Instead, you'll lead through technical depth, architectural judgement, and delivery experience by setting … 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 ...

Software Engineer

Hiring Organisation
NUS Consulting
Location
Redhill, Surrey, South East, United Kingdom
Employment Type
Permanent
Salary
£45,000
forefront of the industry. This is a rare opportunity to be part of the core technical team developing the next generation of systems to form a new foundation for the business. This position requires 3+ years of experience in building, maintaining and troubleshooting SaaS products, ideally using .NET, React … database query optimization in both Oracle SQL and TSQL is highly desirable. A willingness to dive deep into legacy on-prem systems is crucial. Key Responsibilities Build and maintain full-stack systems that run in Azure Cloud environments, both internal and client-facing Create and maintain ...

Project Manager (IT Transformation)

Hiring Organisation
Positive Employment
Location
Portsmouth, Hampshire, England, United Kingdom
Employment Type
Temporary
Salary
£450 per day
government organisation in Portsmouth. The organisation is embarking on a major transformation of its Housing Management services, replacing a complex mix of ageing systems with a single, modern, cloud-hosted Housing Management System (HMS). This high-profile project will play a significant role in improving services for more … engagement where required, ensuring supplier deliverables meet contractual expectations. Oversee all technical and functional workstreams, including data cleansing, migration from multiple legacy systems, integrations with Repairs, Community Safety, Finance and corporate platforms, environment management, and configuration. Manage testing cycles end-to-end, including SIT, UAT, defect tracking ...

Enterprise Data Architect

Hiring Organisation
Coltech
Location
Horsham, England, United Kingdom
insurance or broader BFSI environments, with deep expertise in enterprise data modelling, modern cloud data platforms, governance, and transformation from legacy insurance systems to modern architectures. Role Overview As Enterprise Data Architect, you will own and evolve the target-state data architecture for the Insurance EDP, ensuring … Insurance EDP across ingestion, storage, processing, governance, and consumption layers. Develop target-state architecture and transition roadmaps from legacy insurance systems, including PAS, claims platforms, and mainframe technologies, into modern cloud-based EDP architectures. Establish enterprise canonical data models and domain-driven data structures across: Policy Claims ...

Senior Data Architect

Hiring Organisation
Harnham - Data & Analytics Recruitment
Location
London, South East, England, United Kingdom
Employment Type
Full-Time
Salary
£70,000 - £87,500 per annum
business teams across the full lifecycle Engaging with stakeholders to translate business requirements into technical solutions Supporting data migrations from legacy systems to modern cloud environments YOUR SKILLS AND EXPERIENCE Proven experience as a Data Architect (not purely engineering-focused) Strong Financial Services experience (banking, capital markets ...

Data & AI Solutions Developer

Hiring Organisation
Amtis professional Ltd
Location
London, South East, England, United Kingdom
Employment Type
Full-Time
Salary
£80,000 - £100,000 per annum
integrations Working with large-scale SQL datasets for analytics and reporting Developing automation workflows using RPA technologies including UiPath Bridging legacy systems with modern Microsoft cloud platforms Supporting governance, GDPR compliance, and responsible AI usage Collaborating with senior stakeholders to shape data and AI initiatives Supporting colleagues ...

SAP Implementation Business Analyst

Hiring Organisation
Sussum Consulting LTD
Location
Marlow, Buckinghamshire, England, United Kingdom
Employment Type
Contractor
Contract Rate
£50,000 - £55,000 per annum
live stability. Data Migration Support: Collaborate with data owners to define objects, cleansing rules, and validation logic for migration from legacy systems to S/4HANA. Testing & QA: Coordinate User Acceptance Testing (UAT), develop test scripts, and ensure that the solution meets defined business criteria. Change Management ...

Dynamics 365 Business Central Consultant

Hiring Organisation
True North Group
Location
South East, England, United Kingdom
Employment Type
Full-Time
Salary
Salary negotiable
deployed globally. Key Responsibilities Support the implementation and rollout of Microsoft Dynamics 365 Business Central across the business. Lead the migration of legacy data, ensuring data … cleansed, validated, and accurately transferred prior to go-live. Work with project teams to map data fields and business processes from legacy systems into the new ERP environment. Configure Business Central modules and reporting solutions aligned to approved business requirements. Create and execute test scripts within Azure ...

Software Engineer - Defence Technology

Hiring Organisation
CBSbutler Holdings Limited trading as CBSbutler
Location
Southampton, Hampshire, Nursling, United Kingdom
Employment Type
Permanent
Salary
£60000 - £85000/annum
high-performing team tackling some of the most technically demanding challenges in the defence sector. This isn't about maintaining legacy systems or shipping incremental updates - it's about building cutting-edge capability that operates at the edge, in the field, and under pressure. ## The Role … hardware environments, sensors, and robotics - the kind of engineering problems that push you to grow. You'll own code releases and deployments, support operational systems, and collaborate across disciplines to drive agile best practice into real-world solutions. ## What You'll Be Doing You'll work closely with ...

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
Bridge, Canterbury, Kent, England, United Kingdom
Employment Type
Full-Time
Salary
£70,000 - £80,000 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 ...

Senior C# Developer (Desktop - Web migration)

Hiring Organisation
Avanti Recruitment
Location
SL1, Slough, Berkshire, United Kingdom
Employment Type
Permanent
Salary
£65000 - £80000/annum
Avanti Recruitment is working with a growing, technology-led business based in Slough, that is undergoing a major systems transformation following a recent acquisition. As part of this programme, they are looking to hire a Senior .NET/C# Developer to play a key role in evolving a large … Server Refactoring and modernisation projects Agile environments CI/CD practices Testing methodologies such as TDD Cloud experience Desirable: Experience migrating legacy systems React or JavaScript exposure This is an opportunity to shape a long-term transformation programme, with high-level of technical ownership and influence. This ...

Project / Senior Engineer

Hiring Organisation
SSR Personnel incorporating Executive Profiles Ltd
Location
Walton-on-thames, Surrey, United Kingdom
Employment Type
Permanent
Salary
GBP 45,000 - 55,000 Annual
exceptional van callout (1 in 3-4) Requirements • 5 years in electronic security • Experience with enterprise and legacy systems • Competent with servers, firmware, commissioning & fault finding Systems Experience (some of) • Milestone Systems, Genetec, Avigilon • Gallagher, Lenel, Nedap • CCure, AMAG, S2 • 2N, Zenitel Profile • Strong ...

Team Lead C++

Hiring Organisation
Morgan McKinley
Location
London, South East, England, United Kingdom
Employment Type
Full-Time
Salary
Salary negotiable
Title: Engineering Lead (C++) - Low Latency/Trading Systems Location: London (Hybrid) Overview Our client is a global fintech operating at scale across trading, risk, and market connectivity. They are hiring an Engineering Lead (C++) to take ownership of a business-critical platform sitting at the heart of real … Define and deliver a clear technical and product vision Improve release processes, reducing downtime and increasing deployment frequency Drive modernisation across legacy systems, infrastructure, and tooling Collaborate closely with trading, quant, and risk stakeholders Remain hands-on, contributing to production-grade C++ code What They're Looking ...

Data Consultant

Hiring Organisation
Conexus
Location
London, South East, England, United Kingdom
Employment Type
Full-Time
Salary
Salary negotiable
technical and business sides of enterprise data projects. What you'll be doing Support data extraction and transformation activities from legacy systems into predefined templates Work closely with business stakeholders to identify, resolve, and improve data quality issues Support users through data validation cycles and Go-Live ...

Senior C# Developer

Hiring Organisation
Avanti
Location
Slough, Berkshire, England, United Kingdom
Employment Type
Full-Time
Salary
£65,000 - £80,000 per annum
Avanti Recruitment is working with a growing, technology-led business based in Slough, that is undergoing a major systems transformation following a recent acquisition. As part of this programme, they are looking to hire a Senior .NET/C# Developer to play a key role in evolving a large … Server Refactoring and modernisation projects Agile environments CI/CD practices Testing methodologies such as TDD Cloud experience Desirable: Experience migrating legacy systems React or JavaScript exposure This is an opportunity to shape a long-term transformation programme, with high-level of technical ownership and influence. This ...

Senior .NET Developer

Hiring Organisation
Avanti Recruitment
Location
SL3, Langley Marish, Slough, Berkshire, United Kingdom
Employment Type
Permanent
Salary
£65000 - £80000/annum
Avanti Recruitment is working with a growing, technology-led business based in Slough, that is undergoing a major systems transformation following a recent acquisition. As part of this programme, they are looking to hire a Senior .NET/C# Developer to play a key role in evolving a large … Server Refactoring and modernisation projects Agile environments CI/CD practices Testing methodologies such as TDD Cloud experience Desirable: Experience migrating legacy systems React or JavaScript exposure This is an opportunity to shape a long-term transformation programme, with high-level of technical ownership and influence. This ...

Software Development Manager

Hiring Organisation
Arc IT Recruitment
Location
London, South East, England, United Kingdom
Employment Type
Full-Time
Salary
£10,000 - £130,000 per annum
Role You’ll lead multiple engineering teams and delivery partners, driving the build and integration of modern, cloud-based platforms while transitioning from legacy systems. This is not a hands-on coding role , but equally not a pure programme role — you’ll sit at the intersection of engineering ...

Customer Success Manager - coach management platform

Hiring Organisation
Michael Page Sales
Location
London, South East, England, United Kingdom
Employment Type
Full-Time
Salary
£55,000 - £65,000 per annum
boarding of new customers in the UK Drive structured implementation processes with clear milestones Support and guide customers in migrating from legacy systems and processes (including Distinctive Systems) Map existing workflows and translate them into the platform Ensure successful go-live with minimal operational disruption Customer … from working within or alongside a coach operator Strong understanding of how a coach operator runs: sales, bookings, planning, and operations Familiarity with Distinctive Systems and how it is used in practice Project management, preferably within the implementation of technology Interest in and ability to work with technology ...

Head of Architecture - Infrastructure

Hiring Organisation
Centrica - CHP
Location
Windsor, Berkshire, South East, United Kingdom
Employment Type
Permanent, Work From Home
guiding the architectural vision across our Infrastructure business. This role sits at the heart of a product-led technology organisation, ensuring that our systems and platforms not only support current business needs but are also built to scale and evolve with future demands. You'll be the strategic mind … behind long-term technology roadmaps, aligning them with enterprise architecture and the wider technology strategy. Whether it's rationalising legacy systems or guiding future investments, your focus will be on creating a technology landscape that's efficient, secure, and ready for growth. Location: UK-based hybrid role ...

Senior Cloud Infrastructure Engineer

Hiring Organisation
Proactive Appointments
Location
London, South East, England, United Kingdom
Employment Type
Full-Time
Salary
£80,000 - £90,000 per annum
will assume day-to-day ownership of the firm’s infrastructure estate. With a clear mandate to migrate from on-premise legacy systems to a cloud-first model, this role demands both the practical expertise to manage existing environments and the vision to drive a modern, secure … working and many, many more perks! Senior Cloud Infrastructure Engineer – Key Skills: A minimum of 10 years’ experience in an infrastructure engineering or senior systems administration role, ideally within professional services i.e. legal services Demonstrated experience with Broadcom VMware Cloud Foundation and vSphere, including the ability to manage, optimise ...