1 to 25 of 26 Legacy Code Jobs in the UK

Senior Kotlin Engineer (Event Streaming/Sourcing) – London

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
pair programming, mob programming, and test‐first development practices Build and maintain CI/CD pipelines and deploy services to cloud environments Continuously refactor code and uphold high standards of code quality and reliability Participate in architectural and technical design discussions Collaborate closely with front‐office stakeholders … experience with event‐driven systems (event streaming and/or event sourcing) Experience with CI/CD tools and practices Strong background in refactoring legacy code and maintaining clean, maintainable systems Experience working in Agile/XP environments, ideally including mob programming Excellent communication skills with the ability ...

Senior Kotlin Engineer (Event Streaming/Sourcing) - London

Hiring Organisation
Salt Search
Location
London, UK
Employment Type
Full-time
utilising: Pair programming Mob programming Test-first development practices Build and maintain CI/CD pipelines and deploy services to cloud environments Continuously refactor code and uphold high standards of code quality and reliability Participate in architectural and technical design discussions Collaborate closely with front office stakeholders … experience with event-driven systems (event streaming and/or event sourcing) Experience with CI/CD tools and practices Strong background in refactoring legacy code and maintaining clean, maintainable systems Experience working in Agile/XP environments, ideally including mob programming Excellent communication skills with the ability ...

Senior Android Developer

Hiring Organisation
GUARDIAN NEWS AND MEDIA
Location
London, UK
Employment Type
Full-time
encouraged to help others grow - you will pass on your expertise to other developers, whilst continuing to grow yourself. Sometimes deciding what code to write is as hard as writing the code itself. As an engineer you'll be involved in product decisions as well as technical ones. … more of modern Android development tools, including Jetpack Compose, Coroutines/Flow, MVVM, Webviews, other Jetpack libraries, and modular app architectures. You test your code and promote a culture of testing. Demonstrate experience with some of JVM unit testing, instrumented testing, and UI regression testing You are comfortable working ...

Senior .Net Developer (Billing Systems Essential)

Hiring Organisation
Hays Specialist Recruitment Limited
Location
Southampton, UK
Employment Type
Full-time
join initially on a 2-year Fixed Term Contract.With a significant multi-year Billing Transformation Programme underway, the business is replacing a complex legacy billing platform with a modern enterprise solution. This is a high-impact programme to with strong investment to modernise and the chance to introduce … your time will involve working on a heavily customised, customer-specific billing platform, where logic can vary significantly between clients. You'll analyse existing code, uncover undocumented behaviours and translate this into clear documentation and understanding for both technical and business teams.You'll work closely with Billing SMEs, Business ...

Senior .Net Developer (Billing Systems Essential)

Hiring Organisation
Hays Specialist Recruitment Limited
Location
Southampton, Hampshire, England, United Kingdom
Employment Type
Full-Time
Salary
£60,000 - £65,000 per annum
join initially on a 2-year Fixed Term Contract.With a significant multi-year Billing Transformation Programme underway, the business is replacing a complex legacy billing platform with a modern enterprise solution. This is a high-impact programme to with strong investment to modernise and the chance to introduce … your time will involve working on a heavily customised, customer-specific billing platform, where logic can vary significantly between clients. You'll analyse existing code, uncover undocumented behaviours and translate this into clear documentation and understanding for both technical and business teams.You'll work closely with Billing SMEs, Business ...

.NET Developer

Hiring Organisation
Octad Recruitment Consultants (Octad Ltd )
Location
Wickford, Essex, South East, United Kingdom
Employment Type
Permanent, Work From Home
Salary
£60,000
help build, modernise, and support business-critical Windows applications for this fantastic Software Consultancy. If you enjoy C#, SQL Server, system integrations, and transforming legacy code into clean, modern.NET solutions, this is a great opportunity to make a real impact. Work with: C#, .NET/.NET Core, WinForms ...

PHP Developer - Newcastle (Hybrid)

Hiring Organisation
Reed
Location
Newcastle upon Tyne, UK
Employment Type
Full-time
Developer ready to make a genuine impact across a growing web ecosystem. This isn’t a role where you’ll be stuck maintaining legacy code or working in silos. You’ll be part of a collaborative, modern engineering environment where your ideas are valued, your voice is heard … maintaining applications in AWS cloud environments Troubleshooting, optimising, and improving system performance Collaborating across teams to deliver high-quality, user-focused solutions Contributing to code reviews, technical direction, and best practices Skills: Strong experience with PHP and Laravel (this is key) Solid front-end skills (React or Vue would ...

PHP Developer - Newcastle (Hybrid)

Hiring Organisation
Reed
Location
Newcastle Upon Tyne, Tyne and Wear, England, United Kingdom
Employment Type
Full-Time
Salary
£45,000 - £50,000 per annum, Inc benefits
Developer ready to make a genuine impact across a growing web ecosystem. This isn’t a role where you’ll be stuck maintaining legacy code or working in silos. You’ll be part of a collaborative, modern engineering environment where your ideas are valued, your voice is heard … maintaining applications in AWS cloud environments Troubleshooting, optimising, and improving system performance Collaborating across teams to deliver high-quality, user-focused solutions Contributing to code reviews, technical direction, and best practices Skills: Strong experience with PHP and Laravel (this is key) Solid front-end skills (React or Vue would ...

Firmware Engineer

Hiring Organisation
YT Technologies
Location
Basingstoke, Hampshire, South East, United Kingdom
Employment Type
Permanent
Salary
£75,000
searching for their first dedicated Firmware Engineer to take sole charge of the embedded software roadmap from a completely clean slatemeaning absolutely zero legacy code to fix or maintain . If you are a senior embedded professional looking to escape the corporate machine, own a connected product … your code ship in devices sold globally, this is your next step . The Role This is a high-autonomy, sole-charge technical specialist position . Reporting directly to the Innovation Director, you will be the absolute authority on firmware and connected software platforms within the building . ...

Junior Python Developer

Hiring Organisation
Global
Location
Greater London, United Kingdom
Employment Type
Full Time
machine learning models to run efficiently and effectively in production. 3 best things about the job Build the Future: You aren't just maintaining legacy code; you are building the "brain" of the company, working on end-to-end AI and data developments that directly impact … accelerated engineering: You are capable with using agentic coding tools and able to deliver outcomes effectively into production with tools like Claude Code, Codex, etc. Domain Passion: You should love the challenge of using data & intelligence to drive ad campaign efficiency and demonstrate the value of the investment ...

.NET Developer

Hiring Organisation
Octad Recruitment Consultants (Octad Ltd )
Location
Wickford, Essex, United Kingdom
Employment Type
Permanent
Salary
GBP 60,000 Annual
help build, modernise, and support business-critical Windows applications for this fantastic Software Consultancy. If you enjoy C#, SQL Server, system integrations, and transforming legacy code into clean, modern.NET solutions, this is a great opportunity to make a real impact click apply for full job details ...

Senior SAP ABAP Developer/ Engineer - £80K-£120K + Options - UK

Hiring Organisation
KES EU
Location
London, UK
client has a world-class AI solution for SAP customers looking to modernise their legacy code and optimise business processes. This client has received significant funding and has a great leadership team, putting them in a strong position to realise their ambitious business plans. They require SAP Engineers ...

Senior SAP ABAP Developer/ Engineer - £80K-£120K + Options - UK

Hiring Organisation
KES EU
Location
City of London, Greater London, UK
client has a world-class AI solution for SAP customers looking to modernise their legacy code and optimise business processes. This client has received significant funding and has a great leadership team, putting them in a strong position to realise their ambitious business plans. They require SAP Engineers ...

Senior SAP ABAP Developer/ Engineer - £80K-£120K + Options - UK

Hiring Organisation
KES EU
Location
City of London, London, United Kingdom
client has a world-class AI solution for SAP customers looking to modernise their legacy code and optimise business processes. This client has received significant funding and has a great leadership team, putting them in a strong position to realise their ambitious business plans. They require SAP Engineers ...

Control Systems Engineer

Hiring Organisation
Vantage Consulting
Location
Exeter, Devon, United Kingdom
Employment Type
Permanent
Salary
GBP 40,000 - 50,000 Annual
electrical drawings and system schematics Attending customer sites as required, representing the business professionally and living the company's values Reviewing, maintaining and updating legacy code where necessary Conducting system analysis and development, often working independently Testing and validating software to ensure full compliance with FDS and test … plans Producing clear, consistent and well structured code documentation aligned with best practice and company standards Experience: HNC, HND or Degree in Computer Science, Software Engineering, Electrical Engineering or Electronic Engineering Strong IT skills, including word processing, spreadsheets and databases Proven experience with PLC programming in a customer focused ...

Senior Software Engineer

Hiring Organisation
Meritus Talent
Location
Portsmouth, Hampshire, England, United Kingdom
Employment Type
Full-Time
Salary
£90,000 per annum
centre of a technically complex software estate, where reliability, performance, and long term maintainability are critical. You will be working hands on across legacy and modern systems, driving improvement in code quality, resolving high severity defects, and supporting the evolution of engineering standards across the team. The environment … MATLAB and Simulink Support architecture evolution as system requirements change over time Deliver performance improvements and optimise existing systems where required Drive improvements in code quality, maintainability and engineering standards Mentor and support other engineers through coaching, code review and technical guidance Contribute to peer review processes ...

Senior Analyst, Political Science

Hiring Organisation
Fitch Group
Location
Greater London, United Kingdom
Employment Type
Full Time
Understanding of model evaluation methods and metrics . Ability to operationalize non-technical ideas into relevant research designs, features, and model outputs. Experience translating code between languages (primarily R to Python) Comfort working with legacy codebase Experience writing production code, not just notebooks What Would Make ...

.Net API Developer

Hiring Organisation
Damia Group Ltd
Location
Skipton, North Yorkshire, Yorkshire, United Kingdom
Employment Type
Contract
Contract Rate
£400 - £450 per day
global leading consultancy. They are on the hunt for a .NET Developer to join a financial client of theirs. Responsibilities: Maintained and enhanced legacy .NET applications (ASP.NET, .NET Framework, C#), ensuring business critical systems remained stable, secure, and compliant with evolving requirements. Investigated and resolved production issues by performing … root cause analysis, debugging legacy codebases, and implementing sustainable fixes to improve application reliability. Collaborated with business analysts, testers, and stakeholders to gather requirements, implement enhancements, and deliver application updates with minimal disruption to users. Supported application modernisation initiatives by refactoring legacy components, improving code quality ...

Technical Lead

Hiring Organisation
Yorkshire Water
Location
Bradford, West Yorkshire, Yorkshire, United Kingdom
Employment Type
Permanent, Work From Home
Confident writing and optimising SQL queries, scripts and stored procedures. Practical experience with Octopus Deploy, Azure Pipelines and RESTful APIs. Solid understanding of clean code practices, Agile delivery and thorough code review. Able to troubleshoot production issues and improve or refactor legacy codebases. Excellent communicator ...

MS Dynamics and Power Platform Specialist

Hiring Organisation
Morson Edge
Location
South West London, London, United Kingdom
Employment Type
Permanent
configuration). Contribute to the end-to-end delivery of a bespoke research and risk assessment tool built in Dynamics. Write, review, and validate code written in C#, ensuring alignment with development standards and governance. Work across both project delivery and BAU, including backlog ownership and triage support. Collaborate … software development, with strong exposure to Microsoft Dynamics and Power Platform. A solid development background in C# .Net, with the ability to understand legacy code. Experience delivering custom Dynamics solutions (not just configuration/customisation). Understanding of Power Platform (Power Apps, Power Automate, etc.) Experience working in project ...