Senior SDET

  • Semble
  • 15/05/2026
Full time Information Technology Telecommunications

Job Description

Location & Remote Policy

This role can be fully remote in the UK and EU, within +/- 2 hours of GMT. Candidates located outside these time zones are not considered at this stage.

What you will be doing
  • Create automated tests using Cypress.io and backend testing tools for API and ETL.
  • Participate in code reviews to ensure code quality and promote knowledge sharing.
  • Contribute to and enhance the existing test automation framework.
  • Conduct POCs to expand non functional testing frameworks.
  • Deploy tickets to test environments and production using BitBucket pipelines.
  • Work alongside data engineers, developers, and DevOps to improve data deployment processes.
  • Influence and help shape the roadmap for SDET.
  • Coach junior team members.
  • Champion and embed shift left testing practices within the Data team, defining test scope during refinement sessions and ensuring testable acceptance criteria.
  • Contribute to and evolve Semble's shift left testing strategy, building quality into the upstream development cycle.
What we are looking for
  • 5+ years of professional experience as an SDET or Test Automation Engineer.
  • Commercial experience with JavaScript/TypeScript automation frameworks (Cypress is a plus), focusing on backend and API testing.
  • Commercial experience with Python automation frameworks (pytest, pytest mock); PySpark experience is a plus.
  • Proven experience building automation frameworks from scratch.
  • Familiarity with automating E2E tests using POM and BDD syntax.
  • Experience with API testing using an automation framework.
  • Experience with performance testing tools (Artillery or K6 is a plus).
  • Knowledge of non functional testing.
  • Exposure to DevOps tools such as Jenkins, BitBucket, DataDog, and AWS cloud infrastructure (S3, Delta, Databricks).
  • Strong advocacy for test automation and continual improvement of the automated testing framework.
  • Excellent written and verbal communication skills, capable of representing SDETs and defending quality in the release process.
  • Experience driving shift left testing culture in engineering teams, coaching developers to write tests, and integrating quality conversations early in the development lifecycle.
  • Experience with AI testing, including familiarity with evaluation strategies.
  • French language ability is a welcome bonus but not required.
What you'll get in return
  • A sense of purpose: shaping the future of healthcare.
  • £65-75k package (based on experience and value you bring).
  • Autonomy and ownership: you set the vision and run with it.
  • 36 days off: 25 holidays, bank holidays, and 3 extra days (birthday and 'feel good' days) you are encouraged to take.
  • Company equity: all employees are eligible for Semble share options.
  • Private health insurance covering physical, mental, dental, and optical care.
  • Hybrid & flexible work environment: work from anywhere in the UK, with flexibility across Europe.
  • Latest tech: MacBook (or Windows) and ergonomic home office equipment.
  • Inspiring team: founders with startup experience and knowledgeable colleagues.
  • Central London office with good amenities (barista coffee, tea, fruit, happy hours) for those who visit.