22 of 22 Contract Clean Code Jobs in the UK

Scala Engineer

Hiring Organisation
Sanderson Government and Defence
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
£55 - £79 per hour
data, and design teams to shape solutions Supporting live services, including monitoring, troubleshooting, and optimisation Contributing to CI/CD pipelines and infrastructure as code Writing clean, testable, maintainable code Participating in code reviews, pairing, and team delivery Tech Stack & Environment Backend: Scala, Java (Python desirable … with data platforms or risk/fraud systems How You'll Work Deliver value iteratively and early Collaborate closely across disciplines Write simple, maintainable code Take ownership of services end-to-end Continuously improve systems and team practices Reasonable Adjustments: Respect and equality are core values to us. ...

Senior Java Engineer (AWS, REST, SOAP) - Hybrid - Sussex

Hiring Organisation
Salt Search
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
£500 - £700 per day
pipelines using tools such as Jenkins, GitHub Actions, or AWS CodePipeline. Work with containerisation technologies (Docker) and orchestration platforms (ECS/EKS). Ensure code quality through unit, integration, and automated testing. Apply secure coding practices, including OAuth2/JWT authentication and general security best practices. Collaborate with cross … functional teams to deliver high-impact features and improvements. Participate in code reviews, architectural discussions, and continuous improvement initiatives. Required Skills & Experience Strong proficiency in Java, Spring Boot, and modern backend development. Hands-on experience with AWS cloud services (Lambda, API Gateway, DynamoDB, ECS, S3, etc.). Solid understanding ...

Senior Java full stack developer / Tech Lead

Hiring Organisation
E-Solutions IT Services UK Ltd
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
£70,000 - £80,000 per annum
applications. Build responsive and dynamic user interfaces using React js. Develop backend services and APIs using Java (Spring Boot/Spring Framework). Write clean, maintainable, and efficient code following best practices. Perform code reviews and mentor junior developers. Optimize applications for maximum speed and scalability. Ensure ...

Java 8 Software Engineer | £500 – £550 | Inside IR35 | 6 Months | Hybrid Remote

Hiring Organisation
Opus Recruitment Solutions Ltd
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
£500 - £550 per day
Hibernate development practices Proven ability to build microservices and reliable RESTful APIs Hands-on experience applying TDD and BDD testing approaches Good understanding of clean coding principles, SOLID, and cloud technologies Previous experience in the Finance/Fintech Industry is beneficial Key Responsibilities Design, implement, and thoroughly test ...

Fullstack Software Engineer (Agentic AI)

Hiring Organisation
Adecco
Location
City of London, London, United Kingdom
Employment Type
Contract
documentation Develop, measure, and monitor key metrics for all tools and services and consistently seek to iterate on and improve them Participate in code reviews, continuously improving personal standards as well as the wider team and product Liaise with other technical staff and data engineers in the team … cloud run preferred) including core web application infrastructure is essential Strong skills in JavaScript/TypeScript and Python, ensuring best practices are followed for clean and scalable code Demonstrated ability to work directly with designers, particularly using Figma, to convert design prototypes into engaging and interactive applications Experience ...

Fullstack Software Engineer (Agentic AI)

Hiring Organisation
Adecco
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
Salary negotiable
documentation Develop, measure, and monitor key metrics for all tools and services and consistently seek to iterate on and improve them Participate in code reviews, continuously improving personal standards as well as the wider team and product Liaise with other technical staff and data engineers in the team … cloud run preferred) including core web application infrastructure is essential Strong skills in JavaScript/TypeScript and Python, ensuring best practices are followed for clean and scalable code Demonstrated ability to work directly with designers, particularly using Figma, to convert design prototypes into engaging and interactive applications Experience ...

Contract Full-Stack JavaScript Developer - React & Node

Hiring Organisation
Opus Recruitment Solutions Ltd
Location
South West, England, United Kingdom
Employment Type
Contractor
Contract Rate
£400 per day
features using React & TypeScript Developing server-side functionality with Node.js Working with Nunjucks templating for government service patterns Supporting high-traffic, transactional systems Writing clean, test-driven code ( TDD/Jest ) Improving CI/CD pipelines and development automation Contributing to ever-greening and modernisation Ensuring WCAG-compliant ...

Software Developer

Hiring Organisation
Robert Walters
Location
Warwickshire, England, United Kingdom
Employment Type
Contractor
Contract Rate
Salary negotiable
understand requirements and deliver solutions. Integrate new software systems with existing technologies seamlessly. Troubleshoot and resolve technical issues during development and deployment phases. Write clean, efficient, and maintainable code following best practices. Ensure timely delivery of milestones while maintaining high-quality standards. Key Skills & Experience Required ...

Senior Java Developer - Multithreading/Caching

Hiring Organisation
Harvey Nash
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
£700 - £800 per day
defects. Follow best-practice engineering standards, design patterns, and architectural principles. Apply Test-Driven Development (TDD) in day-to-day development. Use static code analysis tools such as SonarQube to maintain clean, high-quality code. Work efficiently with SQL, data joins, and large/complex datasets. Leverage … data processing or data-intensive applications. Solid understanding of modern architectural patterns (Microservices, Event-Driven Architecture). Strong TDD skills and experience using static code analysis (e.g., SonarQube). Clear communication skills with the ability to explain technical concepts to varied audiences. Nice to Have Cloud experience: AWS/ ...

Front End UI Developer (SC or DV Clearance req'd)

Hiring Organisation
Matchtech
Location
Romsey, Hampshire, United Kingdom
Employment Type
Contract
Contract Rate
GBP Annual
design and evolution of front end architecture, ensuring scalability, usability, and maintainability Integrating UI components with APIs, data stores, and existing backend services Writing clean, secure, well-tested code following modern engineering practices Participating in agile ceremonies including stand-ups, sprint planning, demos, and refinement sessions Collaborating with … environments as part of the wider platform ecosystem Documenting work effectively using appropriate standards, tools, and prototyping methods Job Requirements: A passion for creating clean, usable, and engaging interfaces Confidence collaborating across teams and engaging directly with users A proactive, problem-solving mindset with a drive for innovation ...

GCP Native Engineering Lead

Hiring Organisation
Sanderson Government and Defence
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
Up to £530 per day + Inside IR35
lead engineering and design discussions. Experience working on medium to high complexity systems with minimal supervision. Strong understanding of quality-driven development, including clean code and maintainable design. Ability to collaborate effectively within a team and mentor junior engineers. Reasonable Adjustments: Respect and equality are core values ...

Python Developer

Hiring Organisation
Vallum Associates
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
£500 - £525/day
Ansible Collaborate with DevOps teams to implement and maintain CI/CD pipelines Manage cloud-based infrastructure and containerized applications (Docker/Kubernetes) Write clean, efficient, and reusable code following best practices Troubleshoot, debug, and optimize application performance Ensure security, scalability, and reliability of systems ...

Python Developer

Hiring Organisation
Indotronix Avani UK Ltd
Location
Exeter, Devon, South West, United Kingdom
Employment Type
Contract
Contract Rate
£600 per day
will develop, maintain, and operate software components, following best practices and contributing to team knowledge. Responsibilities: Develop software to meet user needs Write clean, secure, well-tested code Follow and help improve best practice guidelines Mentor junior colleagues Operate and troubleshoot production services Essential Skills: Strong analytical ...

Java Developers x 2 (Guildford)

Hiring Organisation
CBSbutler Holdings Limited trading as CBSbutler
Location
Guildford, Surrey, United Kingdom
Employment Type
Contract
Contract Rate
£500 - £525/day
innovative geospatial solutions using modern cloud technologies. You'll work across the full software development lifecycle, designing and developing scalable cloud-based applications, writing clean, maintainable code, and ensuring quality through testing and best practices. Alongside contributing to code reviews and reusable solutions, you'll collaborate closely ...

Java Developers x 2 (Newcastle)

Hiring Organisation
CBSbutler Holdings Limited trading as CBSbutler
Location
Newcastle upon Tyne, Tyne and Wear, Tyne & Wear, United Kingdom
Employment Type
Contract
Contract Rate
£500 - £525/day
innovative geospatial solutions using modern cloud technologies. You'll work across the full software development lifecycle, designing and developing scalable cloud-based applications, writing clean, maintainable code, and ensuring quality through testing and best practices. Alongside contributing to code reviews and reusable solutions, you'll collaborate closely ...

Scala Developer

Hiring Organisation
Teksystems
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
£700 - £900/day
based platforms. Apply functional programming principles and Domain-Driven Design (DDD) to create maintainable, testable, and well-structured codebases. Participate actively in Agile ceremonies, code reviews, and continuous improvement initiatives to enhance delivery quality and team effectiveness. Essential Skills Strong proficiency in Scala development with a focus on writing … clean, efficient, and reliable code. Solid experience with functional programming principles and their practical application in production systems. Hands-on experience designing and building high-performance, distributed systems. Practical understanding of high-performance system patterns, including event-driven and low-latency architectures. experience working within Agile delivery teams ...

Senior KDB+ Developer

Hiring Organisation
Stackstudio Digital Ltd
Location
London, United Kingdom
Employment Type
Contract
disk I/O, and network considerations across kdb+ processes. Develop robust and reusable q libraries, utilities, and frameworks with a strong focus on clean, maintainable, and performant code. Drive continuous improvement through refactoring, performance benchmarking, and adoption of best practices. Mentor and guide junior and mid-level developers … fostering a culture of technical excellence, code quality, and knowledge sharing. Participate in design reviews, production support, and root cause analysis of complex system issues. Work collaboratively within an Agile or iterative delivery environment, contributing to design, implementation, testing, and release phases. Required Skills & Experience 8+ years of hands ...

Backend Software Engineer

Hiring Organisation
Morgan McKinley
Location
Manchester, Lancashire, England, United Kingdom
Employment Type
Contractor
Contract Rate
£500 - £600 per day
maintaining backend services and APIs Working across a 50/50 Java and TypeScript stack Designing and supporting cloud-based systems in AWS Writing clean, testable, production-ready code Collaborating closely with engineers through pair programming Supporting system reliability, scalability and performance What we're looking for: Strong ...

Software Engineer

Hiring Organisation
IT Human Resources
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
GBP Annual
building Back End services using Python and Java - Working on scalable, production-grade systems - Collaborating closely with product and engineering teams - Contributing to architecture, code quality, and best practices What we're looking for: - Commercial experience with Python and Java - Spring Framework - Strong problem-solving skills and clean ...

Backend Java Engineer

Hiring Organisation
Alexander Mann Solutions - Contingency
Location
London, United Kingdom
Employment Type
Contract
Purpose of the role: Join one of the core cross functional mission teams to build and develop technology products. What you'll do: Develop clean, elegant, and reusable code that is well tested and easy to maintain and extend. Work with stakeholders across the business to drive ...

Software Development Engineer in Test (SDET)

Hiring Organisation
Alexander Mann Solutions - Contingency
Location
London, United Kingdom
Employment Type
Contract
next iteration of products. Work collaboratively across our missions to define and continually improve our testing strategy for new and existing products. Develop clean, elegant, and reusable code that is easy to maintain and extend. Build scalable automated testing systems that enable us to ship value to customers ...

Senior AI Engineer £700 p/d | Outside IR35 | Central London

Hiring Organisation
Akkodis
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
£650 - £750 per day
processes (approvals, performance workflows, document generation, analytics, etc.). Proven experience building AI agents and multi-step automation flows. Strong hands-on engineering skills (clean, explainable, well-structured code). Expertise using ChatGPT Enterprise for workflow automation. Skilled in designing prompts, guardrails, and evaluation logic for reliable outputs. ...