20 of 20 API Testing Jobs in London

Role: We are looking for experienced Automation Test Engineers/SDET to work on projects with our clients from both the public and private sectors. You will have a testing background and be confident using your skills to run projects directly with clients with minimal supervision. You will be a fundamental member of the team, responsible for designing, developing … to accommodate unique team requirements. Initiating and establishing processes for automation and performance monitoring. Actively contributing to both our Quality Engineering teams and our clients in establishing Automation and Testing best practices for the organisation. Collaborating with various teams to address their automation challenges and coordinating efforts with diverse teams to resolve performance test failures. Key Skills & Experience: Excellent … and troubleshooting skills as well as thrive in a dynamic work environment. In depth understanding of QA process and software development life-cycle. Proven experience with current front-end testing frameworks and tools, like Cypress or Playwright. Hands-on experience of building test automation frameworks from scratch. Proficiency in scripting and programming languages such as JavaScript and TypeScript (3+years More ❯

Data Test Automation Technical lead Location: London, UK 6 Months Contract or FTC 2 days onsite work per week • Overall Exp years, Relevant exp years. • Excellent experience in testing of data • Experience in creating data testing frameworks from scratch • Provide guidance to the team for testing of data demonstrating real experience in technology and processes • Technology experience … o JMeter – for API testing (Load and Performance testing experience not needed) o Groovy o Pyspark – Should be able to write scripts for data processing o Data Lakes o Kafka Streamsets o AWS cloud Requirements • Overall Exp years, Relevant exp years. • Excellent experience in testing of data • Experience in creating data testing frameworks from scratch … Provide guidance to the team for testing of data demonstrating real experience in technology and processes • Technology experience o JMeter – for API testing (Load and Performance testing experience not needed) o Groovy o Pyspark – Should be able to write scripts for data processing o Data Lakes o Kafka Streamsets o AWS cloud More ❯

aligning to programme timelines, release trains, and business priorities. Lead test planning, estimation and scheduling across multiple teams and workstreams to ensure on-time delivery. Drive a risk-based testing approach; identify, assess and mitigate testing risks, and maintain a living test risk register. Design and implement the Automation Strategy focusing on UI and API automation; champion … tools, frameworks, CI/CD integration, and re-usable libraries. Lead Playwright adoption and implementation for modern web UI automation, including best practices for resilience, parallel execution, cross-browser testing, and integration with pipelines. Define and lead Non-Functional Testing (NFT) strategy covering performance, load, scalability, security, and accessibility testing; coordinate with platform and infra teams for … all test stages. Drive test environment strategy, including environment provisioning, configuration management, and service virtualization/mock services for dependent integrations. Implement a Test Engineering mindset: promote shift-left testing, testability by design, contract testing, continuous feedback, and test-driven development where applicable. Manage stakeholder relationships across business, product owners, solution and integration architects, infrastructure teams, vendors (Duck More ❯

directly to the CPO. The Software Tester role, is a newly created position for the company and will offer the right candidate significant influence and autonomy to shape the testing approach to our business. We are looking for an experienced Software Tester who is excited to take full ownership of our testing practice. This role is ideal for … someone ready to step up beyond execution, eager to set the testing strategy, implement automation frameworks, and champion quality across our development lifecycle. Develop, maintain and execute test plans, test cases and regression suites for web and API based applications. Define and evolve the overall testing strategy across manual and automated workflows. Implement and manage a new … automation testing framework to support continuous integration and delivery. Ensure clear documentation of test processes, outcomes and quality metrics. Collaborate closely with Product Managers, Developers and Designers to ensure product requirements are thoroughly tested. Drive adoption of testing best practices such as shift left testing, test data management and consistent environments. Perform exploratory and usability testing More ❯

and have the chance to help shape the strategy and direction.Due to the nature of the role, active SC clearance is required.It will involve hands-on functional/automation testing in a QA role, testing an AWS-based PAM solution and identity integrations (AWS > Entra ID), ensuring security, functionality, and CAF-aligned assurance.Key Responsibilities Test AWS-based PAM … configuration, deployment and privileged access journeys. Validate controls against NCSC CAF (identity, privileged access, monitoring, resilience). Execute functional, automation and API testing (UI + backend). Test authentication flows via Entra ID, including MFA and conditional access. Validate federated identity (SAML/OIDC) between Entra ID and AWS-hosted services. Perform data validation within AWS deployments. Conduct … device configuration testing for PAWS. Support integration, regression and exploratory testing. Produce clear test evidence, defects and assurance outputs. Skills & Experience Functional and API testing; experience with Postman or REST Assured. Automation experience; frameworks like Selenium useful. Knowledge of Python, JavaScript or Java for test scripting. Familiarity with JMeter or Gatling for load/performance testing. Strong More ❯

QA Engineer, you'll collaborate closely with development teams, product managers, and business stakeholders to ensure the delivery of high-quality software solutions. Core Skills Required Essential: Automation of API endpoint tests using Playwright in C#, working from Swagger specifications UI test automation expertise with Playwright in TypeScript Proven ability to build, maintain, and enhance automation frameworks Proficiency with … Visual Studio and Azure DevOps pipelines Strong understanding of software testing principles, QA methodologies, and SDLC Capability to balance automation and manual testing approaches based on project requirements Experience managing multiple concurrent projects effectively Cross-browser testing of web applications Version control using Git Excellent communication skills with the ability to articulate technical concepts clearly Highly Desirable … API testing and integration testing background SQL for database queries and data validation Knowledge of BDD tools such as Specflow or Cucumber Experience with test reporting and metrics Familiarity with load/performance testing Exposure to cloud environments (Azure, AWS) Agile methodology experience (Scrum/Kanban) Understanding of various testing types across the testing More ❯

you'll be key to ensuring the quality and reliability of every product release. We're looking for someone who can create robust test plans, carry out thorough feature testing, and help establish automated testing practices that scale with our fast-growing product. Your work will give the team confidence to move quickly while delivering a consistently excellent … understand requirements and define comprehensive test plans for new features Design, document, and execute manual test cases to validate functionality, usability, and edge cases Set up and maintain automated testing frameworks to increase test coverage and reduce manual effort over time Identify, document, and track defects, collaborating with developers to resolve issues quickly and effectively Establish QA best practices … Work closely with engineers to ensure automated tests are part of the CI/CD pipeline, enabling fast and reliable releases Proactively suggest improvements to product quality, processes, and testing tools Contribute to building a culture where quality is owned by everyone in the team We'd love to hear from you if you have: 3+ years of professional More ❯

event sourcing, serverless, CQRS ) Virtualisation and orchestration tools (e.g. VMs, Docker, Kubernetes, etc.) and infrastructure as code (e.g. Terraform, Pulumi) Test automation following Test Driven Development practices including unit testing, API testing, and end-to-end testing Working with lean and agile practices (e.g. Kanban, Scrum, etc.) Collaborating in cross-functional teams It'd be amazing More ❯

s fastest-growing tech innovators, delivering cutting-edge logistics and field service solutions through smart, scalable software. We're looking for a skilled Agile QA Engineer with strong manual testing experience across Web, Mobile, APIs, Databases, and XML . You'll play a key role in shaping quality from the start of the development cycle, working on a high … Be Doing: Design and execute manual and exploratory tests Collaborate on automated test scenarios Own QA environments and test plans Work closely with developers and stakeholders Apply shift-left testing principles from day one What You'll Bring: ISTQB Foundation (or equivalent) 3-4 years' experience in manual testing Api Testing experience Strong SQL and Postman More ❯

teams which include product owner/manager, UX designers, UX researchers, Developers, Platform engineers, etc Demonstrable experience working on continuous improvement environments doing multiple releases every week Coding and testing: Demonstrable experience designing, coding and debugging Golang based systems Good skills in web front end technologies such as HTML, CSS, Bootstrap Golang Spring Boot Docker Kubernetes Atlassian Build tools … Maven, Gradle, Ant Familiar with source control systems, such as GIT, including branching, merging, etc. Testing: TDD, unit testing, JUnit, Mockito, Cypress Good knowledge of relational databases such as MySQL and PostgreSQL including data modelling, SQL scripts, store procedures Shift to the left: Functional test automation (API testing, UI testing [cucumber, nightwatch]) Nice to have More ❯

looking for a Quality Assurance Engineer in the Transactional Banking program. The person must take responsibility for designing, developing, and executing quality assurance for multiple applications across the platform. Testing will be both manual and automated & could be on projects or BAU’s. Automation knowledge and experience is key. The automation engineer will work closely with the development team … to ensure high-quality software delivery and will be responsible for testing and documenting the test process for the software at all levels of the development process. Responsibilities include: Write, design, and execute automated tests by creating scripts that run testing functions automatically Building Automated tests across the stack where applicable Maximize test coverage for the most critical … the effective creation, measurement and control of the test strategy within the ASP Team Review business requirements, creation and execution of Functional, Integration, End-to-End, Regression, UAT & Automation (API) Ownership and driving testing tasks from start to finish Coordinate and support UAT with business users. Develop and maintain automated test scripts using xUnit, Nunit & RestSharp for Backend More ❯

we unlock liquidity across private equity, private credit, and real assets, transforming the industry and enabling investors to move faster and smarter. We are looking for a Senior Automation Testing Engineer to lead the design, implementation, and execution of automated testing frameworks across our platforms. The ideal candidate has extensive experience in building reliable, scalable test automation systems … one programming language used for automation (e.g., Python, JavaScript, or Java). Solid understanding of CI/CD pipelines and experience integrating test automation into build processes. Experience with API testing tools (e.g., Postman, RestAssured) and database validation (SQL). Familiarity with performance and load testing tools is a plus (e.g., JMeter, k6). Excellent communication skills … in English, with the ability to collaborate effectively across teams. Experience using AI-assisted development/testing tools (e.g., Cursor AI) to enhance test coverage and efficiency. Thrives in a fast-moving startup environment - flexible, proactive, and self-directed. If you meet the requirements above you're excited to shape the future of private markets and work alongside a More ❯

to London, Croydon Contract Type: Contract Duration: 6 months initial Sector: Public Sector Active SC Cleared/Security Cleared/Security Clearance/DV Cleared Proven experience in software testing, including at least 2 years in a senior or lead role. Strong knowledge of test methodologies, defect management, and QA best practices. Experience leading test activities across multiple projects … or workstreams. Competence with test management tools (e.g., Jira, TestRail, Azure DevOps). Strong communication, organisation, and leadership skills. Hands-on testing experience across multiple types (functional, regression, integration). Desirable: Exposure to test automation tools (e.g., Selenium, Cypress, Playwright). Experience in API testing and tools such as Postman or REST Assured. Basic understanding of SQL More ❯

Playwright, RestSharp,Automation, Banking,Azure,C#,.Net Role Purpose Azure Pipelines Bachelors degree in Computer Science, Information Technology or related field. At least 3 years of experience in automation testing with xUnit, Nunit, MS Playwright, RestSharp Experience in programming languages such as C# in Dotnet Soft skills like good communication skills Strong understanding of Agile methodologies and experience working … in an Agile development environment. Ability to work in a fast-paced environment and adapt to changes quickly. Min 5 years experience in the testing competency ISEB/ISTQB Qualifications Solid experience in the implementation of the STLC (Test Planning, Monitoring and Control including reporting, Test Analysis and Design, Test Execution, Test Closure) throughout the project lifecycle) Experience with … CI/CD tools such as Azure Pipelines and Octopus Knowledge of SQL and NoSQL databases such as cosmos db. Extensive experience of API testing, REST & SOAP Mobile Testing experience would be an additional benefit More ❯

couples get married. We're on our way to becoming the first $1 billion Muslim tech brand - but we need your help! 2+ years experience of app testing (iOS and Android) Significant manual testing experience Proven success in building and leading a team Skilled in formulating and implementing test strategies Use of test management tools (e.g Qase) Experience … accurate reproduction steps Try to break our apps (in the best possible way) Attend our London office twice a week Mobile test automation experience or an interest Experience in API testing (e.g. Postman, curl) Experience of testing on both iOS and Android Comfortable in databases writing SQL to help collect test data Startup experience Why join Muzz More ❯

Collaborate with product and development teams to define acceptance criteria and test coverage for each story. Design, build, and maintain automated test frameworks using Java. Perform exploratory and automated testing across all phases of development. Work with developers to create and test stubs, mocks, and integration points. Ensure traceability and visibility of test progress and quality metrics. Contribute to … Agile ceremonies, retrospectives, and planning sessions, championing test best practices. Provide test assurance against defined acceptance and non-functional requirements. Support CI/CD integration and continuous improvement of testing processes. Required Skills & Experience 5+ years' experience as an SDET or Automation Engineer. Strong knowledge of Java (OOP, SOLID principles) and ability to build coded test frameworks. Experience with … RESTAssured and API Testing . Familiarity with SQL/RDBMS and Integration Testing . Hands-on with Git/GitLab , Gradle , Jenkins , and SonarQube . Experience with JUnit , Cucumber (TDD/BDD) , and Postman for debugging and exploratory testing. Strong understanding of Agile methodologies and CI/CD pipelines. Excellent communication skills and ability to work autonomously. More ❯

be responsible for building a test automation framework entirely from scratch, working hands-on with cutting-edge AI-powered developer tools Code Rabbit, Cursor, Claude Code to revolutionise how testing is done across the business. This is a very successful, established Fintech in the heart of London. Ideally AI Tech Stack in play but not limited to and the … client are open to new tech: CI/CD pipelines, Jira, Git, Confluence, Jenkins, REST API testing, SNS, SQS, Kafka, AWS MSK, Code Rabbit, Cursor, Claude Code, Perl, JavaScript, C#. A great opportunity taking full ownership of the automation strategy. Designing, building, and scaling frameworks that power high-volume financial transaction systems. Working closely with product development teams … to transform manual regression testing into intelligent , AI-assisted automated suites, improving both quality and delivery velocity. Defining best practices, embedding automation into CI/CD pipelines, and champion a culture of continuous delivery and innovation. Would suit someone with extensive software automation testing. A proactive individual who thrives on a challenge, can own the test, do end to More ❯

be responsible for building a test automation framework entirely from scratch, working hands-on with cutting-edge AI-powered developer tools Code Rabbit, Cursor, Claude Code to revolutionise how testing is done across the business. This is a very successful, established Fintech in the heart of London. Ideally AI Tech Stack in play but not limited to and the … client are open to new tech: CI/CD pipelines, Jira, Git, Confluence, Jenkins, REST API testing, SNS, SQS, Kafka, AWS MSK, Code Rabbit, Cursor, Claude Code, Perl, JavaScript, C#. A great opportunity taking full ownership of the automation strategy. Designing, building, and scaling frameworks that power high-volume financial transaction systems. Working closely with product development teams … to transform manual regression testing into intelligent , AI-assisted automated suites, improving both quality and delivery velocity. Defining best practices, embedding automation into CI/CD pipelines, and champion a culture of continuous delivery and innovation. Would suit someone with extensive software automation testing. A proactive individual who thrives on a challenge, can own the test, do end to More ❯

the ground up, use your voice to drive change and help transform organisations and problem domains. Role: We are seeking a SDET (Software Development Engineer in Test) experienced in API automation, data validation, and AI-enabled systems. The ideal candidate has hands-on experience building automation frameworks in Python and exposure to validating AI or data-driven systems deployed … teams to ensure the reliability and performance of applications that integrate AI/ML components, Agentic AI workflows, and large-scale data processing pipelines. Key Responsibilities: Design and implement API automation frameworks using Python (PyTest, Requests, or Robot Framework). Automate validation for AI-driven systems, including Agentic AI, LLMs, and data pipelines. Test and validate RESTful APIs, data … tests within CI/CD pipelines using Azure DevOps, GitHub Actions, or Jenkins. Work with data teams to validate data transformations, ETL pipelines, and batch processing jobs. Ensure consistent testing coverage across AI services, data APIs, and integration layers. Contribute to framework enablement, mentoring peers and improving test automation standards. Required Qualifications: Strong experience in Python for test automation. More ❯

QA Team and you will be working on a market-leading global analytics platform. The role is around 50% Manuel and 50% automation with a mix of UI and API testing. Key Responsibilities Define acceptance criteria and embed quality early in the SDLC Perform exploratory and automated testing across API and UI Build and maintain automated test … scenarios Create and manage bug reports Support unit, integration, and end-to-end testing Work with deployment teams and resolve CI issues Requirements 8+ years' experience in QA Automation Strong manual and automation skills Experience in Python, Java, or C# UI and API automation knowledge Cross-functional team experience Benefits 25 days holiday 10% bonus Private healthcare Pension More ❯