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QA Engineer

Haystack
Department:Web Design
Type:REMOTE
Region:UK
Location:London, England, United Kingdom
Experience:Mid-Senior level
Salary:£55,000 - £70,000
Skills:
MANUAL QASAASIOS SWIFTANDROID KOTLINRUBY ON RAILSVUE.JSJIRATESTRAILMOBILE TESTINGWEB TESTING
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Job Description

Posted on: April 13, 2026

QA Engineer | £55,000 - £70,000 We're working with a mission-driven Series A accessibility startup that is revolutionising the transport and social mobility sector through an award-winning B2B SaaS platform. This is a high-impact role where you will take complete ownership of the manual testing lifecycle, ensuring global web and mobile applications provide a seamless, inclusive experience for millions of users. You will be the final gatekeeper for releases, navigating a modern technical stack including Ruby on Rails, Vue.js, Swift, and Kotlin. This isn't just about finding bugs; you'll be embedding yourself in the design phase to strengthen acceptance criteria and working closely with SDETs to decide what moves into automation pipelines. The Role

  • Lead the end-to-end testing lifecycle for complex web and mobile SaaS applications, ensuring high reliability across global releases.
  • Act as the strategic partner for Engineering, conducting rigorous smoke tests and regression passes for native iOS and Android clients.
  • Maintain and scale the TestRail repository to bring clarity and structure to the QA process as the company grows internationally.
  • Tackle greenfield projects, testing critical features like offline mode data syncing and real-time location services.
  • Collaborate directly with Product and Design teams to refine Acceptance Criteria (AC) before a single line of code is written.

What You'll Need

  • Extensive experience in Manual QA with a focus on SaaS platforms, ideally within Transport, Logistics, or Government tech.
  • Deep proficiency in testing native mobile applications (iOS Swift and Android Kotlin), specifically handling location services and offline sync constraints.
  • Strong technical literacy to navigate and test across Ruby on Rails backends and Vue.js frontends.
  • Proven track record using Jira and TestRail to manage workflows and improve release confidence.
  • The ability to manage complex user permissions and data flows between mobile devices and web platforms.

What's On Offer

  • Competitive salary (£55k - £70k) with a purpose-led business making a real-world impact.
  • Comprehensive Private Healthcare and a benefits package designed for your well-being.
  • Fully remote working environment with the autonomy to shape the QA function.
  • The chance to join a scaling Series A startup during a period of rapid international expansion.

Apply via Haystack today!

Originally posted on LinkedIn

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