Senior QA Engineer (TradeZella product)

Railsware • Productivity Software • IT Consulting • TypeScript • 29 days ago
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Salary
≈ $51k – $84k per year (Estimated)
Location
Remote (Poland)
Seniority
Senior
Employment
Full-Time
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Railsware

Railsware is a product studio and software engineering company headquartered in Krakow, Poland, and founded in 2007. The company builds custom web and mobile products for clients while also developing its own tools, including the Mailtrap email testing platform, the Coupler.io data integration service, and Smart Checklist for Jira. It works mainly with startups and scale-ups in Europe and North America and is known for publishing its internal product management practices.
railsware.com • HQ: Kraków, Poland • IT Outsourcing • Productivity Software • IT Consulting • Web Development • Information Technology • Software • 51-200 employees • Est. 2007

We're looking for a Senior QA Engineer who cares about product quality end-to-end, someone who gets trading through real experience, professional or personal. Trading doesn't need to be your career; a hobby or a past chapter counts, but long-term investing alone doesn't.

You'll join TradeZella , our trading journaling and educational platform, and focus on how the product works in real conditions: testing functionality, investigating edge cases, and resolving complex issues together with engineering, product, and support teams. This role requires a genuine interest in the trading domain, along with strong UX testing skills.

WHAT WE ARE LOOKING FOR?

Required skills

Testing & QA expertise:

Strong experience with manual testing and end-to-end validation

Solid UX testing skills beyond formal requirements (user acceptance testing, business acceptance testing, usability validation)

Hands-on day trading experience (any market: stocks, forex, futures, crypto), past or present, professional or personal, with the ability to walk us through at least one strategy you've traded

Experience in investigating customer issues and performing root cause analysis

Experience in building and improving QA processes

Technical skills:

Strong debugging and problem-solving skills, including log analysis (CloudWatch, Logs Explorer)

Good understanding of networks, HTTP, APIs, and web/client architectures

Experience with version control systems (GitHub, GitLab, etc.)

Experience using AI tools for workflow optimization

Communication & mindset:

Ability to translate technical concepts for different audiences (engineering ↔ non-technical)

Strong sense of ownership and accountability

Structured, detail-oriented approach

Fluent English (written and spoken)

As a plus

Experience with Playwright (TypeScript)

Your responsibilities

  • Analyze requirements, test functionality, and identify defects and edge cases

  • Own investigation of complex customer issues through L3 support, driving root cause resolution

  • Partner with engineering and product to resolve issues and improve system reliability

  • Improve QA practices and elevate debugging and investigation standards, including AI adoption practices

  • Support releases and ensure stable rollouts with active post-release follow-up

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