Senior SDET

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.

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