Software Development Engineer in Test (SDET)

The world of work is changing forever - not just where it happens, but how and why. People want flexibility, meaning, and connection. At Kadence, we’re building the operating system for hybrid work, helping organisations coordinate people, places, and projects so everyone can do their best work, wherever they are.

Our mission is to help every organisation unlock the full potential of its people through smarter coordination of workplaces, schedules, and teams. From intelligent space management and real-time workplace analytics, to seamless team coordination, AI assistants, and meaningful workplace events, Kadence helps companies create environments where work flows and people thrive.

Backed by world class investors and trusted by over 500 organisations, Kadence is growing fast. With established teams in Belfast, London, and Salt Lake City, we’re just getting started. If you’re excited by mission-driven impact, big ideas, and helping define the future of work - join us.

WHAT YOU'LL DO

• Build and maintain automated test frameworks and suites for API, web, mobile, and performance testing.
• Design test strategies and plans that ensure high quality across the Kadence’s software stack.
• Implement end-to-end test automation and maintain robust coverage across key user flows.
• Execute test cases (manual and automated), analyse results, and clearly report bugs and errors.
• Collaborate closely with cross-functional teams including engineers, QA, product, design to ensure quality is embedded throughout the development lifecycle.
• Contribute to technical discussions and help shape our approach to quality engineering.
• Debug and troubleshoot complex issues and provide clear defect documentation.
• Conduct post-release and regression testing to ensure ongoing stability.
• Create and maintain internal documentation for testing processes and frameworks.

WHAT YOU BRING

• Proven experience as an SDET or QA Automation Engineer with a focus on API, end-to-end (E2E), and performance testing.
• Demonstrated experience building and scaling automated testing frameworks for APIs, frontend, and mobile.
• Strong hands-on experience with tools such as Cypress or Playwright (E2E), Postman (API), and load/performance tools like k6, JMeter, or equivalent.
• Experience designing and maintaining automated test frameworks across web, mobile, and API layers.
• Ability to develop and execute robust test plans that cover real-world user journeys and edge cases.
• Proficiency in working with CI/CD pipelines (e.g. Jenkins, GitHub Actions) and integrating test automation into build and release workflows.
• Strong understanding of Agile development and the role of testing throughout the sprint lifecycle.
• Comfort with writing clear, testable acceptance criteria using Gherkin or similar syntax.
• Excellent debugging, investigation, and root-cause analysis skills.
• A collaborative, detail-oriented mindset and strong communication across teams.
• BSc in a related field such as Computer Science, Computer Engineering, or other software/design discipline.

OUR TECH STACK

• Backend: PHP 8.2 / Symfony 7, REST, API Platform, NodeJS, Python, Rust.
• Frontend: TypeScript, Angular 19.
• Mobile: Android (Kotlin), iOS (Swift).
• Desktop: Cross platform desktop app built with Electron (TypeScript).
• Database: MySQL (Aurora DB), Redis (ElastiCache), MongoDB (AWS DocumentDB).
• Cloud & DevOps: AWS (20+ services), Kubernetes (EKS), Docker, Infrastructure as Code (CloudFormation, Terraform), CI/CD (Jenkins, GitHub Actions), Observability (AWS, Grafana).
• Development tools: GitHub, Jira, Notion, ChatGPT, Gemini, LangChain, AI-native IDE's (Cursor, JetBrains), LLM-powered internal tools.
• Test automation: Cypress (E2E), Postman (API), Jest (frontend unit), PHPUnit (backend unit), JUnit (Android), XCTest (iOS).

WHAT WE OFFER YOU

• A front-row seat in a fast scaling, early stage startup.
• Working on cutting edge problems with brand new technologies.
• Join a passionate and fun team that is quickly expanding in Belfast and beyond.
• We embrace hybrid working - collaborate from home or make use of our sleek office in the heart of Belfast city centre with access to a rooftop terrace, private member coffee lounge and regular wellbeing events.
• Regular company socials including an annual offsite to get to socialise with your colleagues in person.
• 5 weeks vacation per annum (plus public holidays), flexible work/life balance.
• Competitive salary and stock options.
• Private healthcare and company pension.
• Cycle2work scheme.

HEAR FROM OUR CEO