26 to 50 of 78 Clean Code Jobs in London

Ready to build software that actually matters? Join a team where you’ll be solving real-world problems from day one — not just writing code in the corner. We’re looking for an ambitious Graduate Software Developer who loves tackling technical challenges, learning fast, and working with smart, supportive … Stack Engineer role within 12–24 months. What You’ll Do Design and build high-performance software used by thousands of users daily Develop clean, efficient, and scalable code in Python, C++ or JavaScript Collaborate with engineers, data scientists, and product teams on exciting new features Contribute ...

consistent, and maintainable. This is a hands-on engineering position suited to someone who understands how data and logic flow through a system, writes clean and well-structured code, and enjoys solving complex, real-world operational challenges. Tech Stack · Frontend: Angular, RxJS, TypeScript · Backend: Node.js, GraphQL, PostgreSQL, Apollo … optimise relational database schemas and SQL queries. · Work with the team to refine requirements, clarify tickets, and ensure accurate implementation of functionality · Write clean, testable, and maintainable code · Integrate with and enhance GraphQL APIs and backend services · Contribute to GraphQL schema design and resolver implementation · Collaborate on improving ...

have a good knowledge of AWS You also have an appreciation of UI development with TypeScript/React You take in pride in producing clean, high quality code You're familiar with modern software engineering tools such as Kafka, Kubernetes, MongoDB You are collaborative and pragmatic, able ...

Guide and mentor junior developers within the team. Lead architecture design and technical planning discussions. Ensure coding standards, security best practices, and high-quality code reviews. Promote continuous improvement in development practices and processes. Advocate for a security by design mindset in all engineering activities. Software Development Design, build … test, and deploy full stack applications using modern tools and frameworks. Collaborate with product managers, designers, and stakeholders to understand business needs. Write clean, maintainable, and efficient code. Troubleshoot and resolve complex production issues. Contribute to automation and CI/CD testing workflows. Skills & Experience Back End: Proficiency ...

Guide and mentor junior developers within the team. Lead architecture design and technical planning discussions. Ensure coding standards, security best practices, and high-quality code reviews. Promote continuous improvement in development practices and processes. Advocate for a "security by design" mindset in all engineering activities. Software Development Design, build … test, and deploy full stack applications using modern tools and frameworks. Collaborate with product managers, designers, and stakeholders to understand business needs. Write clean, maintainable, and efficient code. Troubleshoot and resolve complex production issues. Contribute to automation and CI/CD testing workflows. Skills & Experience Back End: Proficiency ...

with real ownership of the front‐end stack. You'll evolve and scale existing platforms, lead on new greenfield builds and set standards for code quality, performance and front‐end architecture. What you'll do Design, build and ship modern PWAs, web apps and sites using Vue.js, ES6, HTML …/CSS. Create reusable components and libraries, and optimise apps for speed, scalability and reliability. Own pull requests, code reviews and front‐end best practices, keeping security and performance front of mind. Spot and fix performance bottlenecks across web and mobile experiences. Mentor other developers and help drive ...

processing pipelines using PySpark (batch and/or streaming). • Implement robust ETL/ELT workflows to ingest, transform, and validate large datasets. • Write clean, testable, and efficient code; perform unit/integration testing and support CI/CD practices. • Monitor, troubleshoot, and improve performance of applications … Spark jobs. • Collaborate with data engineers, analysts, and product teams to translate requirements into technical solutions. • Contribute to code reviews, technical documentation, and adherence to coding standards. Required skills and experience: • Strong programming skills in Java (e.g., collections, multithreading, exception handling, REST APIs). • Hands-on experience with PySpark ...

representing UWP with confidence and clarity. Role Overview As a Senior Developer, you'll lead the build and implementation of front-end features, ensuring clean, reusable code and seamless collaboration with designers and strategists. You'll be hands-on in translating UI/UX concepts into working digital ...

drive real product and business impact. In this role, you will work closely with principal engineers and architects to define technical best practices, champion clean coding standards, and deliver robust tools that integrate seamlessly with monitoring, operations, and security platforms. You will take ownership of technical research activities, such … guiding the team through the full software development lifecycle. You will actively contribute to and often lead collaborative engineering activities including pair programming, code reviews, troubleshooting, and issue resolution. A strong commitment to quality is essential, as you will be expected to apply automated test-driven techniques, maintain high ...

machine-readable and automation-ready using methodologies. Python Development - Strong proficiency in Python programming including object-oriented design, asynchronous programming, error handling, and writing clean, maintainable code. Experience with key libraries including Pandas, NumPy for data manipulation, requests and APIs for integrations, asyncio for concurrent processing, and building robust … databases (Pinecone, ChromaDB, FAISS), embeddings, and building AI-powered automation solutions that leverage natural language understanding. Appian BPA Platform - Strong experience with Appian low-code platform including process modelling, interface design, expression rules, integration objects, and data modelling. Skilled in building end-to-end business process applications, configuring workflows ...

machine-readable and automation-ready using methodologies. Python Development - Strong proficiency in Python programming including object-oriented design, asynchronous programming, error handling, and writing clean, maintainable code. Experience with key libraries including Pandas, NumPy for data manipulation, requests and APIs for integrations, asyncio for concurrent processing, and building robust … databases (Pinecone, ChromaDB, FAISS), embeddings, and building AI-powered automation solutions that leverage natural language understanding. Appian BPA Platform - Strong experience with Appian low-code platform including process modelling, interface design, expression rules, integration objects, and data modelling. Skilled in building end-to-end business process applications, configuring workflows ...

oriented design Must be eligible for SC Clearance Nice-to-Have Skills Python exposure Experience with AWS What You'll Bring A passion for clean, maintainable code A cooperative mindset and willingness to contribute to team success Curiosity, problem-solving ability, and a drive to continuously improve Reasonable ...

applications. You will work closely with designers and back-end developers to create seamless user experiences using modern front-end technologies. You will write clean, maintainable code and ensure optimal performance across all devices. Key responsibilities: - Develop new user-facing features using React, Vue, or Angular - Build reusable … code and libraries for future use - Ensure the technical feasibility of UI/UX designs - Optimize applications for maximum speed and scalability - Collaborate with back-end developers and web designers - Implement responsive design principles - Conduct code reviews and mentor junior developers - Stay up-to-date with emerging front ...

have a good knowledge of AWS You also have an appreciation of UI development with TypeScript/React You take in pride in producing clean, high quality code You're familiar with modern software engineering tools such as Kafka, Kubernetes, MongoDB You are collaborative and motivated to learn ...

believes in empowered autonomy. We value results, trust, diligence & attention to detail. We need a \"safe pair of hands\" who can take ownership of code quality and manage their own time effectively. The Opportunity We don't just patch bugs; we innovate. We actively encourage the use of Agentic … integrate third-party systems (ERPs, Payment Gateways). Architectural Collaboration: Collaborate with the CTO on architectural decisions and performance optimizations. Quality Control: Write clean, standards-compliant, testable code and assist in code reviews. The Essentials (About You) Experience: Minimum 3+ years of commercial experience with Magento ...

backend development when needed. Our systems are already live and in active use, so your focus will be on reliability, performance, automation, observability, and clean, maintainable Infrastructure-as-Code. You’ll also support Python and Node.js backend services. This role is centred on operational excellence, continuous improvement, and technical … evolve cloud infrastructure, primarily on Google Cloud Platform (GCP), with some exposure to AWS and Azure Write, review, and manage modular, reusable Terraform code Operate and enhance CI/CD pipelines using GitHub Actions Containerise and deploy backend applications using modern tooling (e.g., Docker, Kubernetes) Implement and manage comprehensive ...

Knowledge of payment gateways, ISO 20022, or SWIFT formats. • Collaborative, fast-paced, and engineering-driven culture. • Emphasis on engineering autonomy, architectural decision-making, and clean code. Collaborative, fast-paced, and engineering-driven culture. Emphasis on engineering autonomy, architectural decision-making, and clean code. Join Our Global Team ...

operate services on Azure (AKS/ACI/Azure Functions, API Management). Implement CI/CD (GitHub Actions/Azure DevOps), Infrastructure as Code (Bicep/Terraform), secrets via Azure Key Vault, private networking. Add observability: tracing/telemetry (OpenTelemetry, LangSmith), metrics, logs, cost and token usage monitoring … model versioning, reproducibility, performance monitoring, bias mitigation, data governance, and ethical AI use. Document architectural decisions, runbooks, and operational procedures. Software Engineering & Collaboration Write clean, tested, maintainable code in Python (and optionally .NET). Apply SOLID, TDD/BDD where sensible, code reviews, refactoring, performance profiling. Collaborate ...

backend services and responsive user experiences using React and NextJS. What You'll Do Build and maintain scalable, secure applications, modern architectural patterns Write clean, test-driven code with a focus on performance and usability Collaborate across teams to deliver iterative improvements Lead on innovation and continuous delivery … What We're Looking For Proven experience working with React Strong understanding of microservices, CI/CD, and DevOps practices Confident writing performant frontend code Agile mindset with excellent communication skills Enthusiastic about solving problems and sharing knowledge Nice to Have: Experience with Drupal 7 Familiarity with serverless architectures ...

Design and build scalable, high-availability systems processing millions of real-time transactions Work with Java 17+, Spring WebFlux, AKKA, Kafka, and more Write clean, testable code using TDD and BDD Contribute to architectural decisions in a fast-evolving codebase Collaborate within Agile teams (Kanban/Scrum) What ...

APIs and understanding fundamentals Familiarity with authentication approaches like OAuth or JWT Exposure to Azure and cloud deployment A testing mindset and care for clean, maintainable code Nice to have, not essential: API gateways or API management platforms Event-driven or message-based systems Building APIs for external ...

able to offer your ideas and designs to help the software development team improve their quality of work. The team strives to write clean, decoupled, and testable code with a clear separation of components and responsibilities. The main responsibilities of the position include: Develop standalone applications and plug … tests, and stress tests Communicate with the team to identify business requirements Understand business requirements and develop systems/features to meet them Develop code in accordance with the system design and coding standards with minimal supervision Review the code of associate developers Main requirements: BSc/ ...

full-stack features Architect and maintain APIs, microservices and data-driven backend systems Lead system design discussions and influence long-term technical direction Ensure code quality through clean architecture, testing and documentation Optimise performance across frontend and backend layers Collaborate with Product, Design and Data teams to shape … Strong understanding of modern software architecture, design patterns and scalability Expert in at least one backend ecosystem and one frontend framework Excellent at writing clean, modular, well-tested code Comfortable leading design decisions and proposing architectural improvements Strong debugging, optimisation and performance profiling skills Comfortable mentoring others, collaborating ...

their software engineering capability, developing novel solutions of a mission critical nature. As a Full Stack Software Developer, you will be responsible for Writing clean, secure code following a test-driven approach Create code that is open by default and easy for others to reuse Translate logical ...

architecture to deployment Collaborate with analysts to solve real-world business problems Support and mentor junior team members on coding and data skills Deliver clean, maintainable, and scalable solutions Who They’re Looking For 1-5 years of experience with Java (essential) and Python Familiarity with databases, (e.g. … Server, Postgres) Experience with developing, testing, or deploying with cloud providers (e.g. AWS, GCP, Azure) Excellent problem-solving skills and clean coding habits Prior experience in finance, or high-performance environments 📩 Apply now! If you don't hear back within three working days, unfortunately, your application has not been ...