1 to 25 of 92 Permanent Unit Testing Jobs in London

of APIs with other services. Write clean, well-designed, and reusable code. Test your code on an appropriate level and cooperate with the Developers in Test in creation of testing frameworks Acknowledge and be able to explain the tradeoffs with any technical decision. Take part in specification workshops where we define functional and non-functional characteristics of our systems … over a range of interfaces. You understand how the web works, REST APIs, OpenAPI spec/Swagger, GraphQL, and the difference between REST and RPCs. You understand TDD, BDD, unit testing, integration testing and when to use them. You are familiar with trunk-based development in git. Experience with back-end web application frameworks (Django, FastAPI, etc More ❯

and MySQL and caching mechanisms such as server caching, browser caching, CDN caching, database query caching, in-memory caching (like Redis and Memcached), and application caching Expertise in comprehensive testing lifecycle inclusive of Unit Testing, User Acceptance Testing, Regression Testing, and Defect Remediation. Comfortable with Agile and Waterfall development lifecycles for project deliveries Experience with More ❯

card issuing market. Collaborate with Product Managers, UX/UI Designers, Solutions Architects, and other Engineers to define requirements, create software architecture, and deliver high-quality solutions. Implement automated testing and deployment strategies to ensure reliability and efficiency in the software delivery process. Optimize applications for maximum speed, scalability, and security. Stay abreast of emerging trends and technologies in … QL Databases: MS SQL Server, Dynamo DB, MySQL, Postgres (others advantageous) ORMs: Entity Framework, Dapper Microservice Architecture, Containerisation, Event Driven Systems Cloud Services: API Gateway, k8s, Serverless (Preferably AWS) Unit Testing Using: XUnit, NUnit A Bit About Us Thredd is the trusted next-gen payments partner for innovators looking to modernise their payments offering. Certified by Mastercard, Visa More ❯

continuous learning, pairing and structured onboarding. Collaborate with the wider digital delivery team, ensuring alignment with the clients business objectives and user needs. Quality Assurance & Standards: Implement robust automated testing strategies, including unit, integration and end-to-end testing. Champion adherence to coding standards, accessibility (WCAG 2.2 AA), security best practices and Government Digital Service (GDS) guidelines. Oversee … using Next.js (preferred) and/or .NET Core. Solid grasp of component-based architecture, client-server integration and front-end performance optimisation. Test-driven mindset with demonstrable experience in: Unit testing (e.g. Jest, XUnit) Integration and E2E testing (e.g. Cypress) Proficient in Git and working with version control in collaborative teams. Desirable Skills and Experience Experience using More ❯

continuous learning, pairing and structured onboarding. Collaborate with the wider digital delivery team, ensuring alignment with the clients business objectives and user needs. Quality Assurance & Standards: Implement robust automated testing strategies, including unit, integration and end-to-end testing. Champion adherence to coding standards, accessibility (WCAG 2.2 AA), security best practices and Government Digital Service (GDS) guidelines. Oversee … using Next.js (preferred) and/or .NET Core. Solid grasp of component-based architecture, client-server integration and front-end performance optimisation. Test-driven mindset with demonstrable experience in: Unit testing (e.g. Jest, XUnit) Integration and E2E testing (e.g. Cypress) Proficient in Git and working with version control in collaborative teams. Desirable Skills and Experience Experience using More ❯

continuous learning, pairing and structured onboarding. Collaborate with the wider digital delivery team, ensuring alignment with the clients business objectives and user needs. Quality Assurance & Standards: Implement robust automated testing strategies, including unit, integration and end-to-end testing. Champion adherence to coding standards, accessibility (WCAG 2.2 AA), security best practices and Government Digital Service (GDS) guidelines. Oversee … using Next.js (preferred) and/or .NET Core. Solid grasp of component-based architecture, client-server integration and front-end performance optimisation. Test-driven mindset with demonstrable experience in: Unit testing (e.g. Jest, XUnit) Integration and E2E testing (e.g. Cypress) Proficient in Git and working with version control in collaborative teams. Desirable Skills and Experience Experience using More ❯

with RESTful APIs. Experience in code management tools as Git and package managers (e.g., pip, poetry, uv, npm, or yarn). Ability to write clean, efficient, and maintainable code, unit tests, and documentation, following best practices and coding standards. Strong problem-solving and analytical skills. You take accountability and can work both independently and as part of a team. … for individuals to join our team who can work both autonomously and collaboratively with our internal team and clients. Nice to have Experience with AWS services. Strong experience in unit testing and TDD. Experience with GenAI development tooling (e.g., Cursor, Kilo Code, Co-Pilot, etc). Experience with System Design. (e.g., system design components, CAP theorem/concept … TypeScript, and more within cross-functional teams. You will support the development of client-facing functionality, such as web applications, from detailing requirements, designing, and developing a solution, to testing and validating that the solution matches user expectations You will be part of the development of client-facing features for our B2B SaaS products, encompassing requirements gathering, solution design More ❯

team in the Analytics and Data Platform group, responsible for architecting and building out brand new data integration. You will be responsible for: Practicing disciplined software engineering (e.g. automated testing, code reviews, and writing beautiful, pragmatic code) Coding in Java and Python Building out a brand new data management tool to support our business and operational users, working closely … with the rest of the Data and Analytics platform Unit testing, integration testing. Contributing to maintaining and constantly improving the CI/CD pipeline Code reviews, design reviews Code instrumentation, setting up proactive monitoring dashboards Liaising with users and subject matter experts in order to gather requirements, analyse solutions and triage feedback and incidents Understanding business requirements and More ❯

mid-level developer. You must have experience with: .Net Core, C# Azure WebAPI, RESTful APIs Blazor or React, plus TypeScript Agile/Scrum delivery and DevOps basics Git, SourceTree, Unit Testing, Entity Framework Youll be trained by senior developers and work on real-world projects from day one. Youll gain experience with Azure APIs, SharePoint integrations, and full More ❯

Data Engineer - Investment Banking - London/Hybrid (Data Engineer, SQL Data Engineer, Java, Python, Spark, Scala, SQL, Snowflake, OO programming, Snowflake, Databricks, Data Fabric, design patterns, SOLID principles, ETL, Unit testing, NUnit, MSTest, Junit, Microservices Architecture, Continuous Integration, Azure DevOps, AWS, Jenkins, Agile, Data Engineer, SQL Data Engineer) We have several fantastic new roles including a Data Engineer More ❯

command of building and optimizing backend systems. Hands-on experience with relational/SQL databases, ensuring efficient and reliable data management. Well-versed in software engineering essentials such as unit testing, CI/CD, integration testing, and ensuring code reliability and reproducibility. Familiarity with cloud providers (e.g., Google Cloud, Microsoft Azure) and containerization tools like Docker is More ❯

data solutions for performance and scalability. Explore new data management and processing techniques, making recommendations where appropriate. Adhere to Interpath's software engineering best practices (eg, technical design, review, unit testing, monitoring & alerting, source code management and review, and documentation). Become a subject matter expert and point of contact on available data within the business. Collaborate with More ❯

developers. Architect and implement innovative software solutions using advanced design principles and patterns. Drive architectural discussions and strategic direction for scalable and maintainable software features. Define and implement robust unit testing strategies and mentor team members in quality assurance practices. Troubleshoot and resolve complex technical issues using advanced debugging techniques. Oversee version control practices, including branching strategies and More ❯

relevant field (including computational, numerate or life sciences), or equivalent experience Cloud experience (e.g. Google Cloud and cloud run preferred) including core web application infrastructure Strong skills in Python Unit testing experience (e.g. pytest) Knowledge of agile practices and able to perform in agile software development environments Strong knowledge of modern software development tools/ways of working More ❯

Python, and TypeScript) and help ensure test coverage across both web and mobile applications. You'll drive QA strategy, improve our automation capabilities, and help guide our shift-left testing approach. This isn't just about finding bugs. It's about building confidence in our product, driving quality upstream, and making sure we ship robust, scalable solutions at pace. … championing best practices and modern QA approaches. We're a fast-moving TransitTech business with plenty of exciting challenges-legacy code, evolving architecture, and new features that need rigorous testing across web, iOS, and Android platforms. If you thrive in an environment where you can make a real impact, we'd love to chat. What You'll Be Doing … Cypress, Appium, Pytest, PHPUnit). Support data-driven decision-making - using test coverage metrics, bug trends, and release health to influence quality improvements. Conduct high-value manual and exploratory testing, particularly where automation is not yet in place. Owning system, integration, and E2E testing across multiple interconnected applications Collaborate with engineers, product managers, and designers early in the More ❯

trading and technology teams to identify and implement new automation opportunities Requirements Advanced Python programming: production-level experience programming in Python 3 and adherence to software development best practices Testing proficiency including unit testing, integration testing, and automated test frameworks Database and data integration experience working with company various SQL data sources and creating data pipelines More ❯

JavaScript framework (AngularJS or ReactJS) Expertise in front-end skills, specifically HTML and CSS Proficiency in core JavaScript Experience in designing responsive websites Experience with LAMP stack Experience with unit testing (PHPUnit), application, and stress testing Experience working within SCRUM/Agile methodologies Knowledge of GIT version control Examples of previous work and published code Please note More ❯

applications with C#/.NET web and back-end functionality using Microsoft Visual Studio. Developing solutions with the Windows Presentation Foundation (WPF) framework for desktop applications. .NET, WPF, PRISM, Unit Testing, Async and applying MVC and MVVM patterns. Demonstrated experience in developing quality, maintainable and well-designed software. Good understanding and practical experience with OOA/OOD/ More ❯

the latest technologies and define the technical roadmap for future developments. Requirements: Skills and Experience: Experience : A minimum of 10 years in C# development. Technical Proficiency : Strong coding and unit testing skills (C#, LINQ, SQL) and extensive knowledge of .NET frameworks (e.g., Entity Framework). Database Expertise : Familiarity with various databases, including MySQL, Oracle, Azure SQL Server, MongoDB More ❯

support engineers' growth. Foster a culture of collaboration and mutual respect. Required Experience Experience with AI tools such as GitHub Copilot Proficiency in C# and .NET 8+ SQL, Git, Unit Testing, RESTful web services, Messaging & queuing Experience with front-end frameworks like React, Docker, Microservice Data Architecture, Microfrontend & Atomic Design Preferred Experience MySQL, Postgres, Kubernetes, GraphQL Education & Experience More ❯

the latest technologies and define the technical roadmap for future developments. Requirements: Skills and Experience: Experience : A minimum of 10 years in C# development. Technical Proficiency : Strong coding and unit testing skills (C#, LINQ, SQL) and extensive knowledge of .NET frameworks (e.g., Entity Framework). Database Expertise : Familiarity with various databases, including MySQL, Oracle, Azure SQL Server, MongoDB More ❯

Copilot (or your preferred AI coding assistant) • Work in a tight feedback loop: branch, commit, pull, test, and ship - all through Azure DevOps • Write clean, tested, production-ready code - unit testing is second nature, not an afterthought • Participate in focused sprints and daily standups - we work lean, iterate fast, and learn as we go What You ll Bring More ❯

Copilot (or your preferred AI coding assistant) • Work in a tight feedback loop: branch, commit, pull, test, and ship - all through Azure DevOps • Write clean, tested, production-ready code - unit testing is second nature, not an afterthought • Participate in focused sprints and daily standups - we work lean, iterate fast, and learn as we go What You’ll Bring More ❯

meetings in our offices are encouraged to better develop working relationships. Here's how: • Taking full ownership for delivery of technical tasks, including detailed technical design, code development and unit testing. • Resolving issues identified by internal and client testers as identified during project testing phases. • Contributing to the estimation process through accurately tracking time worked on tasks. • Providing More ❯

configuration-driven development Experience with performance optimization and feature degradation techniques • Experience creating and extending templated controls, and writing custom controls Experience with asynchronous and concurrent code Experience with unit testing and related patterns Experience with JavaScript client- and server-side development Experience with DevOps, gulp scripts, Jenkins and AWS Required Education Bachelor's degree or better in More ❯