QA Engineer

London, England (Remote) Posted on April 16, 2026

Job Description

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!

About Haystack

Haystack reinvented the intranet for the future of work, with a focus on seamless integrations, powerful search capabilities, and consumer-grade design. Our innovative solutions enable organizations to deliver customized experiences that inspire and engage their employees. Our digital workplace and intranet software help employee-centric organizations like Weight Watchers, Credit Karma, BuzzFeed, NerdWallet, Chime, Project44, Thumbtack, Strava, Foursquare, and many more improve alignment, increase engagement, and onboard new hires faster. Our customers have seen measurable improvements in employee engagement, productivity, and business performance. Haystack’s team comes from leading technology companies like Google, Snap, and PayPal. We're a profitable software company that is proudly backed by world-class investors like Coatue, Greycroft, BoxGroup, executive and founders at companies like Microsoft, Riot Games, Twitter, and more.

Industry: Software Development