26 to 50 of 64 Code Quality Jobs in Central London

based frontend development, with extensive expertise in React. This includes a deep understanding of the DOM, component design, CSS, and state management. Solid performance and security knowledge: profiling, memoization, code-splitting, tree-shaking, bundle analysis, Core Web Vitals, OAuth2/OIDC, JWT handling, CSRF/XSS mitigation, CSP/SRI, dependency hygiene. Proven experience interacting with and co-designing … such as: polling/SSE/WebSockets for long-running tasks, optimistic updates, progress states, idempotent actions. Proficiency in integration, component and unit testing, with a strong commitment to code quality and maintainability. Strong knowledge of DevOps and Git best practices. Experience automating version control, testing, and releases, preferably with GitHub Actions. Nice to have Some experience … Golang). This includes knowledge of database (MongoDB) access patterns (e.g., Optimistic Concurrency Control - OCC) and schema design, domain-driven architecture, and concurrency. Familiarity with the OpenAPI specification and code generation toolsets for API development. Some experience with Python, modern development techniques, and design patterns. Experience in data science tools and ML tools (e.g., NumPy, pandas, scikit-learn, PyTorch More ❯

based frontend development, with extensive expertise in React. This includes a deep understanding of the DOM, component design, CSS, and state management. Solid performance and security knowledge: profiling, memoization, code-splitting, tree-shaking, bundle analysis, Core Web Vitals, OAuth2/OIDC, JWT handling, CSRF/XSS mitigation, CSP/SRI, dependency hygiene. Proven experience interacting with and co-designing … such as: polling/SSE/WebSockets for long-running tasks, optimistic updates, progress states, idempotent actions. Proficiency in integration, component and unit testing, with a strong commitment to code quality and maintainability. Strong knowledge of DevOps and Git best practices. Experience automating version control, testing, and releases, preferably with GitHub Actions. Nice to have Some experience … Golang). This includes knowledge of database (MongoDB) access patterns (e.g., Optimistic Concurrency Control - OCC) and schema design, domain-driven architecture, and concurrency. Familiarity with the OpenAPI specification and code generation toolsets for API development. Some experience with Python, modern development techniques, and design patterns. Experience in data science tools and ML tools (e.g., NumPy, pandas, scikit-learn, PyTorch More ❯

Docker. Leverage MongoDB and Databricks for data processing and analytics. Integrate with relational databases and support legacy data migration. Collaborate with stakeholders and contribute to technical decision-making. Ensure code quality through testing, debugging, and optimisation. Essential Skills 3+ years of backend development experience in financial systems. Proficiency in Java and/or Kotlin. Strong knowledge of More ❯

to our serverless GCP architecture — including Cloud Functions, Firestore, and Cloud Run Collaborate with designers and product managers to deliver beautiful, intuitive user interfaces Write clean, testable, and maintainable code following best practices Integrate with third-party APIs and Shopify’s ecosystem Contribute ideas to improve code quality, developer workflows, and overall architecture Help shape new More ❯

to our serverless GCP architecture — including Cloud Functions, Firestore, and Cloud Run Collaborate with designers and product managers to deliver beautiful, intuitive user interfaces Write clean, testable, and maintainable code following best practices Integrate with third-party APIs and Shopify’s ecosystem Contribute ideas to improve code quality, developer workflows, and overall architecture Help shape new More ❯

and/or implementing data pipelines from major financial market data vendors (Bloomberg, Refinitiv, Factset....) SDLC and DevOps: Git, Docker, Jenkins/TeamCity, monitoring, testing, agile practices. Passionate about code quality, data integrity, and building scalable and robust systems. Ability to communicate clearly with technical and non-technical colleagues. This hire has been budgeted at a salary More ❯

and/or implementing data pipelines from major financial market data vendors (Bloomberg, Refinitiv, Factset....) SDLC and DevOps: Git, Docker, Jenkins/TeamCity, monitoring, testing, agile practices. Passionate about code quality, data integrity, and building scalable and robust systems. Ability to communicate clearly with technical and non-technical colleagues. This hire has been budgeted at a salary More ❯

Description Develop, maintain, and enhance PHP-based applications and systems. Working on SaaS Enterprise systems Collaborate with cross-functional teams to deliver high-quality technology solutions. Ensure code quality and performance through testing and debugging practices. Participate in architectural discussions and provide innovative solutions. Optimise existing systems for scalability and efficiency. Document technical specifications and More ❯

Project Reactor Designing, building, deploying and running services for retail scale workloads and considerations for running at scale Working in agile teams with a strong focus on testing and code quality across the whole build and deployment cycle, including pair programming, TDD and BDD practises Building for security, resilience and scale with testing practises to evidence behaviours … of your software using automation Tools required to run and deliver software in agile teams including automation pipelines, and Infrastructure as Code technologies, ideally terraform, with public cloud infrastructure a positive More ❯

level investment expertise. Improving connectivity - integrate and incorporate additional data sources into our agent loop, increasing the depth and breadth of the analyses that can be performed. Maintaining high code quality - uphold rigorous standards across our codebase, ensuring tech debt doesn't impede our velocity. Recent projects include: Agentic assistant with a finance-focused toolkit and advanced More ❯

level investment expertise. Improving connectivity - integrate and incorporate additional data sources into our agent loop, increasing the depth and breadth of the analyses that can be performed. Maintaining high code quality - uphold rigorous standards across our codebase, ensuring tech debt doesn't impede our velocity. Recent projects include: Agentic assistant with a finance-focused toolkit and advanced More ❯

with global stakeholders to deliver robust, maintainable solutions and drive technical improvements across the platform. Responsibilities Develop new business features and improve existing system capacity Work on system architecture, code quality, and delivery best practices Analyze and modernize legacy components to simplify architecture and improve maintainability Improve testability, CI/CD, deployment reliability, and system observability Troubleshoot More ❯

with global stakeholders to deliver robust, maintainable solutions and drive technical improvements across the platform. Responsibilities Develop new business features and improve existing system capacity Work on system architecture, code quality, and delivery best practices Analyze and modernize legacy components to simplify architecture and improve maintainability Improve testability, CI/CD, deployment reliability, and system observability Troubleshoot More ❯

and contributing to multiple internal tools and products.You’ll join a collaborative team of developers with a strong peer-review culture. There are no dedicated testers, so attention to code quality is essential. Tech Stack OO PHP (7/8), bespoke MVC, Laravel , Symfony MySQL , Docker , AWS (EC2, RDS, Amplify) JavaScript , Bootstrap (minimal front-end work) Testing More ❯

high-frequency FX trading Collaborate with quants and traders to deliver platform enhancements Drive performance tuning and solve low-level technical bottlenecks Maintain high standards in testing, documentation, and code quality Tech Stack & Skills: Strong proficiency in core Java Exposure to JavaScript/TypeScript & HTML5 is a plus Deep understanding of data structures, algorithms, and performance optimization More ❯

high-frequency FX trading Collaborate with quants and traders to deliver platform enhancements Drive performance tuning and solve low-level technical bottlenecks Maintain high standards in testing, documentation, and code quality Tech Stack & Skills: Strong proficiency in core Java Exposure to JavaScript/TypeScript & HTML5 is a plus Deep understanding of data structures, algorithms, and performance optimization More ❯

for 0-1, working with regular feedback loops to iterate and improve as you go. They would expect strong opinions and pragmatism of how to balance speed with software quality/best practice. What’s in it for you? A cutting-edge, product-focused company where you will use the latest technology to build great products that are More ❯

for 0-1, working with regular feedback loops to iterate and improve as you go. They would expect strong opinions and pragmatism of how to balance speed with software quality/best practice. What’s in it for you? A cutting-edge, product-focused company where you will use the latest technology to build great products that are More ❯

youll play a key role in helping the team evolve from early-stage speed to long-term stability, with the freedom to influence both product direction and engineering quality What youll be doing … Building and scaling a Node.js application that sits at the core of the product Designing and implementing new features for different sectors and use cases Helping drive improvements in code quality, architecture, and testing practices Working closely with product and engineering to prioritise, shape, and deliver features Introducing best practices and guiding a shift towards cleaner, more … maintainable code What were looking for: Strong hands-on experience with Node.js backend software development Comfortable working across or picking up other tech as needed ie AWS, React etc (If you have experience with AWS & React, that is a bonus) Enthusiasm for writing clean, tested, production-ready code Experience (or interest) in data-heavy systems, IoT, or connected More ❯

for 0-1, working with regular feedback loops to iterate and improve as you go. They would expect strong opinions and pragmatism of how to balance speed with software quality/best practice. What’s in it for you? A cutting-edge, product-focused company where you will use the latest technology to build great products that are More ❯

platform expertise with architectural vision and mentoring capability. Key Responsibilities Lead the design and delivery of ServiceNow architecture across multiple product lines (beyond ITSM). Guide development teams, enforcing code quality, standards, and architecture reviews. Act as a trusted advisor to clients and internal teams, influencing design decisions and solution strategy. Develop integrations with cloud infrastructure (AWS More ❯

customer-facing tools. ->Contribute to architecture discussions, suggest improvements, and help optimize system performance. ->Write clean, testable, and maintainable code. ->Collaborate in an agile environment, participating in sprint planning, code reviews, and team knowledge-sharing sessions. Tech Stack ->TypeScript ->Next.js ->Node.js ->GCP ->AWS (ML) ->CI/CD with GitHub actions and workflows ->SQL (PostgreSQL, MySQL) ->NoSQL (MongoDB, Firestore, Redis … front-end frameworks like React.js -> Experience with Docker, REST APIs, and cloud services (AWS, GCP, or Azure). -> A pragmatic problem solver who can balance delivering features with maintaining code quality. ->Strong communication skills and ability to collaborate across teams. Nice to haves... ->Python experience. ->GCP experience. ->Experience with AI/ML-powered applications. ->Exposure to real-time data More ❯

customer-facing tools. ->Contribute to architecture discussions, suggest improvements, and help optimize system performance. ->Write clean, testable, and maintainable code. ->Collaborate in an agile environment, participating in sprint planning, code reviews, and team knowledge-sharing sessions. Tech Stack ->TypeScript ->Next.js ->Node.js ->GCP ->AWS (ML) ->CI/CD with GitHub actions and workflows ->SQL (PostgreSQL, MySQL) ->NoSQL (MongoDB, Firestore, Redis … front-end frameworks like React.js -> Experience with Docker, REST APIs, and cloud services (AWS, GCP, or Azure). -> A pragmatic problem solver who can balance delivering features with maintaining code quality. ->Strong communication skills and ability to collaborate across teams. Nice to haves... ->Python experience. ->GCP experience. ->Experience with AI/ML-powered applications. ->Exposure to real-time data More ❯

features Work closely with product managers, designers, and stakeholders to translate ideas into robust, scalable solutions Mentor, guide, and grow a talented engineering team, while setting best practices for code quality, performance, and security Stay hands-on with code, while also steering technical strategy and project planning Champion an agile development process, ensuring efficient delivery and More ❯

features Work closely with product managers, designers, and stakeholders to translate ideas into robust, scalable solutions Mentor, guide, and grow a talented engineering team, while setting best practices for code quality, performance, and security Stay hands-on with code, while also steering technical strategy and project planning Champion an agile development process, ensuring efficient delivery and More ❯