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Start.io Logo Start.io · IT - Software Development

Manual QA Engineer

Poland · Job Posted June 09, 2026
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Job Description

Start.io is a mobile marketing and audience platform. Start.io empowers the mobile app ecosystem and simplifies mobile marketing, audience building, and mobile monetization. Start.io's direct integration with over 500,000 monthly active mobile apps provides access to unprecedented levels of global first-party data, which can be leveraged to understand and predict behaviors, identify new opportunities, and fuel growth. If you are people-oriented combined with a passion for the tech and operation side, your place is with us. We are a dynamic and innovative technology company seeking a detail-oriented Manual QA Engineer to join our quality assurance team. If you are passionate about ensuring software quality and have a keen eye for detecting even the smallest imperfections, we want to hear from you!

Job Responsibility

  • Develop comprehensive test plans and test cases based on business, functional, and technical requirements
  • Perform thorough functional, integration, and exploratory testing
  • Create detailed and clear bug reports with step-by-step reproduction steps
  • Participate in test planning, design, and review processes
  • Conduct user acceptance testing (UAT)
  • Collaborate closely with development teams to identify and resolve software defects

Requirements

  • Strong English communication skills
  • 5+ years of experience in manual software testing
  • Solid understanding of software testing methodologies and best practices
  • Excellent analytical and problem-solving skills
  • Hands-on experience in API testing (REST/OpenRTB)
  • Experience working with relational and non-relational databases (SQL-based systems, MongoDB, Aerospike, etc)
  • Proficiency in writing clear and concise bug reports
  • Experience with test management tools (e.g., Jira, Testmo, TestRail)
  • Familiarity with Agile/Kanban development methodologies
  • Attention to detail and commitment to quality

Nice to have

  • Previous experience in the ad-tech industry
  • Familiarity with ad tech concepts (SSP, DSP, RTB auctions)
  • Understanding of automation testing concepts
  • Experience with SDK testing
  • Understanding of microservices architecture
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