1 to 25 of 66 Permanent Clean Code Jobs in London

effort and enabling scale. Key Responsibilities Build and maintain internal systems such as job schedulers, monitoring stacks, and automation tools Improve reliability, repeatability, and self-service across infrastructure Write clean, efficient code (primarily Go, Python, Bash) Support traditional infrastructure such as servers, switches, and storage systems Participate in a shared on-call rota across the team Required Experience … networking protocols and hardware environments Understanding of low-latency or post-trade systems Why Apply? Work on the internal infrastructure that makes the firm run Tackle technical challenges across code, systems, and hardware High autonomy in an engineering-led environment Exposure to large-scale compute, low-latency trading systems, and incredibly talented dev teams No legacy drag, just clean code, fast iteration, and meaningful work Strict confidentiality applies – your profile is only shared with your permission. More ❯

web applications while collaborating closely with cross-functional teams to ensure seamless front-end and back-end integration. You'll focus on optimizing website performance, ensuring scalability, and writing clean, maintainable code that adheres to industry standards. As a key contributor, you'll troubleshoot issues, participate in agile development processes, and stay current with emerging trends in full … web applications using React and Typescript Collaborate with cross-functional teams to ensure seamless integration of front-end and back-end functionalities Optimize website performance and ensure scalability Write clean and maintainable code that adheres to industry standards and best practices Troubleshoot and debug issues that arise during development and testing Continuously improve the quality of the codebase … through code reviews and refactoring Participate in agile ceremonies such as sprint planning and retrospectives Stay up-to-date with emerging trends and technologies in full-stack development Requirements: You have at least 5 years of experience in software development and are highly skilled in React, Typescript, and APIs You possess strong problem-solving skills and can think critically More ❯

defining technical standards, optimising runtime performance, and mentoring less- experienced engineers in workflow-centric delivery. This is an ideal role for someone who enjoys solving complex process problems through clean code, automation, and modern engineering practices. The role involves visiting client sites; the company will cover travel expenses. Frequency is uncertain but candidates should be comfortable with that … iterate business processes Develop and maintain automated test suites, CI/CD pipelines, and containerised deployments Optimise Camunda engine performance and monitor workflow metrics for production environments Participate in code reviews, peer testing, and technical design discussions Contribute to their internal best-practice frameworks and automation accelerators Essential Eligible (have resided in the UK for the past 5 years … solutions using Camunda 7 or 8 (BPMN/DMN) Familiarity with Camunda connectors, external task workers, and scripting extensions Exposure to cloud platforms (AWS, Azure, GCP) and infrastructure-as-code (Terraform, Helm) Experience integrating process automation with case-management or service-orchestration platforms Understanding of agentic AI capabilities and how they can complement workflow automation Experience mentoring developers or More ❯

defining technical standards, optimising runtime performance, and mentoring less- experienced engineers in workflow-centric delivery. This is an ideal role for someone who enjoys solving complex process problems through clean code, automation, and modern engineering practices. The role involves visiting client sites; the company will cover travel expenses. Frequency is uncertain but candidates should be comfortable with that … iterate business processes Develop and maintain automated test suites, CI/CD pipelines, and containerised deployments Optimise Camunda engine performance and monitor workflow metrics for production environments Participate in code reviews, peer testing, and technical design discussions Contribute to their internal best-practice frameworks and automation accelerators Essential Eligible (have resided in the UK for the past 5 years … solutions using Camunda 7 or 8 (BPMN/DMN) Familiarity with Camunda connectors, external task workers, and scripting extensions Exposure to cloud platforms (AWS, Azure, GCP) and infrastructure-as-code (Terraform, Helm) Experience integrating process automation with case-management or service-orchestration platforms Understanding of agentic AI capabilities and how they can complement workflow automation Experience mentoring developers or More ❯

and solutions that directly align with our strategic business goals and deliver real value to our customers. Craft High-Quality Software : Write, test, and maintain robust, scalable, and efficient code that exemplifies engineering best practices and stands the test of time. Champion Operational Excellence : Ensure our systems are reliable, performant, and maintainable in production, creating seamless experiences for our … users. Elevate Your Team : Guide and mentor fellow engineers through coaching, knowledge sharing, and thoughtful code reviews, fostering a culture of continuous learning. Shape Our Engineering Culture : Actively participate in and contribute to the company's broader engineering initiatives, helping to define and evolve our technical standards and practices. It will be a match if you have... A Bachelor … consuming RESTful APIs. Full-Stack Integration : Experience bridging frontend and backend systems, including API design, data flow optimisation, and end-to-end feature development. Strong foundation in unit testing, clean code practices, SOLID principles, and software design patterns. Proficiency with relational databases (MSSQL, PostgreSQL) and cloud platforms (AWS, GCP, or Azure). It will be even better if More ❯

Python, leveraging FastAPI. Lead architectural discussions with a focus on performance, scalability, and reliability. Deliver complex features end-to-end - from design through deployment and monitoring. Provide mentorship through code reviews, technical guidance, and best practices. Collaborate with Product, Design, and Engineering teams to deliver at pace. Continuously raise the bar for engineering standards, code quality, and delivery. … development environment Solid expertise in microservices, APIs, messaging patterns, and distributed systems. Proficient with cloud platforms (AWS, GCP, Azure) and containerisation (Docker; Kubernetes preferred). Strong engineering fundamentals - testing, clean code, performance tuning, and algorithms. Experience with relational and non-relational databases (PostgreSQL, MongoDB). Comfortable working in agile, fast-moving environments with high ownership. Curious about new More ❯

Collaborate with product managers and designers to define user requirements and convert them into functional applications. Implement responsive user interfaces that ensure a seamless user experience across devices. Write clean, maintainable code and conduct code reviews to uphold coding standards. Optimize applications for maximum speed and scalability, addressing performance bottlenecks as they arise. Develop and maintain backend More ❯

established, fast-growing EdTech company whose platform is used by tens of millions of users per month. You’ll work in a small, high-performing engineering team that values clean code, ownership, and practical problem-solving. The environment is straightforward and delivery-focused, no unnecessary process, just smart people building a product that makes a real difference. The More ❯

established, fast-growing EdTech company whose platform is used by tens of millions of users per month. You’ll work in a small, high-performing engineering team that values clean code, ownership, and practical problem-solving. The environment is straightforward and delivery-focused, no unnecessary process, just smart people building a product that makes a real difference. The More ❯

architectures etc) and how to apply them Experience with software engineering and DevOps best practices as well as the complete SDLC applied to data, e.g. automation, testing, contract definition, clean code, CI/CD, path to production Worked with AWS as a cloud platform Extensive hands-on experience with modern data technologies, ETL tools (e.g. Kafka, Flink, DBT More ❯

Transformation functions to help architect and deliver applications in line with best design and development practices. Operating in an Agile/Scrum environment, they will be adept at producing clean, testable and maintainable code and will demonstrate strong analytical skills, technical problem-solving ability, and an understanding of development excellence within the constraints of a regulated banking environment. … development is required, along with the ability to turn wireframes and UI designs into functioning applications. Experience working in a technical Agile environment—using build tools, static/dynamic code analysis, CI/CD pipelines (such as Jenkins or TeamCity) and automation testing—is essential, as is strong unit-testing capability. Additional knowledge of the Elastic ELK stack, Docker More ❯

What You’ll Be Doing: Building and refining key features within the new platform - focusing on report presentation, editing, and configuration. Working across React (TypeScript) and Go to deliver clean, maintainable, well-structured code. Understanding how data flows through backend services into the presentation layer. Partnering closely with Product, Design and the CTO to shape user experience and technical More ❯

experience working onbehaviouraltracking implementations for Adobe and Google Analytics,and marketing tags with GoogleAdWorks, Criteo, Bing, Facebook, Adjust andAdobe Analytics. Strong working knowledgein handling APIs, eventlistenersandJavaScript able to write clean,readableandperformant code. Prior experience in implementing Analytics for native mobile apps, able todemonstrateclear process of providing requirements, QA and sign-off. Additional Information Our commitment: Equal opportunities are important More ❯

experience working onbehaviouraltracking implementations for Adobe and Google Analytics,and marketing tags with GoogleAdWorks, Criteo, Bing, Facebook, Adjust andAdobe Analytics. Strong working knowledgein handling APIs, eventlistenersandJavaScript able to write clean,readableandperformant code. Prior experience in implementing Analytics for native mobile apps, able todemonstrateclear process of providing requirements, QA and sign-off. Additional Information Our commitment: Equal opportunities are important More ❯

experience working onbehaviouraltracking implementations for Adobe and Google Analytics,and marketing tags with GoogleAdWorks, Criteo, Bing, Facebook, Adjust andAdobe Analytics. Strong working knowledgein handling APIs, eventlistenersandJavaScript able to write clean,readableandperformant code. Prior experience in implementing Analytics for native mobile apps, able todemonstrateclear process of providing requirements, QA and sign-off. Additional Information Our commitment: Equal opportunities are important More ❯

Imagine joining a fintech thats small enough for your code to make a dent yet backed by the kind of financial power that moves billions every day. This isnt another digital transformation project. Its about re-engineering how institutions handle short-term investmentswith clean code, smart automation, and a touch of elegance. Youll sit between the tech … everything flowing smoothly, from trade execution to data orchestration. What Youll Be Doing Building and designing systems that the financial ops team actually use daily. Writing lean, reliable Python code that scales. Spotting inefficiencies and automating them before anyone else does. Collaborating across teams to translate business needs into solid engineering. Bringing ideas to the table Youre Likely Someone More ❯

drive growth and enhance the customer experience. What You'll Do Build and maintain robust, scalable applications across the full stack Collaborate in an agile team environment to deliver clean, maintainable, and testable code Influence architectural decisions and technology choices Optimise Front End and Back End performance to ensure fast, seamless user experiences Contribute to continuous improvement efforts … Stack Engineer or similar role Expertise in React, JavaScript/TypeScript, HTML, CSS , and responsive design principles Strong understanding of Back End technologies and best practices Passion for writing clean, well-tested code Experience with cloud platforms (AWS, Azure, or GCP) Excellent communication skills and the ability to explain technical ideas clearly A mindset focused on scalability, maintainability More ❯

Python Software Engineer who’s excited by the idea of building intuitive, high-impact web applications that truly make a difference to the education sector? If you love writing clean code, collaborative development and solving real-world problems, this is your chance to work on meaningful products in a modern engineering environment. This is a fantastic opportunity to More ❯

metrics, alerts) for observability and faster iteration. Collaborate closely with ML engineers to align datasets with training needs and accelerate experimentation. Requirements Must-have Strong Python fundamentals; you write clean, maintainable, production-ready code. Solid hands-on Kubernetes experience (containers, jobs, batch/distributed processing). Proven track record with unstructured data, especially images (loading, filtering, transforming at scale More ❯

platform while setting engineering standards others aspire to. Role Responsibilities Design, develop, and maintain high-quality full stack solutions that meet business and technical requirements. Lead by example—write clean, scalable, and maintainable code that sets engineering standards for the team. Drive automation and quality assurance, contributing to frameworks and metrics that ensure system correctness and reliability. Collaborate More ❯

future of the organisation. If you want influence, growth, and the chance to build things that last , this is the place. Are you a DevOps Engineer who loves to code as much as you love to automate? Do you want to help shape the future of a business that's transforming the way technology powers decisions, products, and customer … build rather than just configure - we want to meet you. We're looking for a DevOps Engineer with a strong software engineering mindset: someone who enjoys solving problems in code, is confident sharing ideas, and wants to be part of a high-impact technical evolution. You'll collaborate with engineers, data teams, and product leaders to deliver scalable, automated … cloud-native solutions that make a real difference. What You'll Do Design, build, and improve CI/CD pipelines and cloud-native infrastructure. Write production-grade code to automate, optimise, and enhance the platform. Partner with engineering teams to embed DevOps best practices across the business. Help drive the adoption of modern tooling, infrastructure as code, and More ❯

Imagine joining a fintech thats small enough for your code to make a dent yet backed by the kind of financial power that moves billions every day. This isnt another digital transformation project. Its about re-engineering how institutions handle short-term investmentswith clean code, smart automation, and a touch of elegance click apply for full job More ❯

potential for a long-term engagement. Responsibilities: -Architect, build, and maintain robust web applications using Laravel (10+) -Design and implement RESTful APIs, background jobs, and event-driven workflows -Write clean, testable code following best practices (TDD) -Author and maintain unit and feature tests, ensuring high coverage -Work with Data Transfer Objects (DTOs) and well-known design patterns (Repository … Service, etc.) -Optimize Eloquent and raw SQL queries for performance and scalability -Deploy and manage applications on Linux servers; collaborate with DevOps for CI/CD pipelines -Perform code reviews and contribute to technical documentation -Troubleshoot, debug, and resolve production issues on time Requirements Required Skills & Experience -PHP & Laravel: 4+ years of hands-on experience, with at least More ❯

Java development to join us working with our media client. You will make a key contribution to the entire development lifecycle including new writing features, fixing bugs and performing code reviews. You will have the opportunity to lead the design and development of high quality software solutions and tools to meet business needs, collaborate with Principle Engineers and Architects … to define best practices, write clean/efficient code following good design patterns, lead research activities such as technical spikes, lead troubleshooting and issue resolution activities, follow automated test-driven techniques to ensure high code quality and participate in pair programming and reviews whilst coaching/mentoring junior members of the team. The successful application will have … cloud based infrastructure ideally AWS Lambda, S3 and Step functions be comfortable following test driven development practices such as TDD and BDD have developed CI pipelines be confident deploying code to production systems be an excellent communicator and enjoy team collaboration some experience in AWS CDK (desired) have solid understanding of software development principles, best practices and Agile methods More ❯

.NET Developer The Role: As a .Net Developer you will join our team to help us deliver high quality code for new and existing projects. Your main focus will be the development and refactoring of backend-services using C# .NET (full framework, .NET6) and supporting application delivery to multiple environments. The main responsibilities of the position include: Full stack … design and the implementation of key internal applications Identify, troubleshoot and debug defects in designated application code Write reusable, testable, clean and documented code, utilising prescribed coding conventions Follow test driven development, continuous integration and agile methodologies Participate in peer code reviews Main requirements: BS/MS degree in Computer Science, Engineering, or a related subject … SOLID architecture principles Excellent problem solving and troubleshooting skills Outstanding communication and interpersonal skills Dynamic and target oriented The following will be considered an advantage: Experience with microservices architecture (Clean Architecture, CQRS) A strong background in relational database theory and excellent knowledge of Relational Databases (SQL Server/MYSQL/Oracle) Experience with communication protocols like GraphQL, GRPC Experience More ❯