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Moloco

QA Engineer (1-Year Contract)

Seoul, Korea
Level
Mid

Not stated in the posting: salary, work type, visa.

Open. First seen 2 October 2026.

Apply on the company's site →

About the role

Moloco's standard text

About Moloco:

Moloco is an AI-native performance advertising company, bringing the power of AI advertising to the open internet. Founded in 2013 by machine learning engineers who had built AI advertising systems inside the world's largest technology companies, Moloco began from a shared mission: to build that same engine for the open internet.

Today, Moloco is one company with two businesses, built on the same compound AI system. Moloco Ads is our AI-native performance advertising platform, helping mobile app marketers acquire, retain, and re-engage high-value users across the open internet. Moloco Commerce Media is our AI-native retail media platform, enabling retailers and marketplaces to turn their platforms into thriving ad businesses. Both are powered by CARA (Compound Ad Recommendation Architecture), the AI system behind every Moloco product.

At Moloco, we bring together those who've already solved hard problems and those with the drive to. Here, we work on some of the complex problems in AI advertising, at a scale and level of sophistication very few companies can offer. Come build what's next.

Mission of the Role

Ensure the quality, stability, and reliability of Moloco’s services by conducting rigorous manual testing and building AI Agent-driven automated testing frameworks. The QA Engineer will balance hands-on exploratory testing with modern AI technologies to write test cases, analyze failures, and optimize testing pipelines. By working closely with Software Engineers, you will improve product quality, development efficiency, and release confidence.

What You will Do

  • Conduct thorough manual testing for new features, complex edge cases, and user-centric scenarios to ensure high product quality before release.
  • Design, build, and scale an AI Agent-assisted test automation framework to transition repetitive manual tests into automated integration and end-to-end tests.
  • Utilize AI Agents for automated test generation, script maintenance (auto-healing), and enhancing exploratory testing.
  • Analyze bugs and errors found during both manual and automated testing, and communicate actionable findings (repro steps, root-cause insights) to Software Engineers.
  • Choose the appropriate testing strategy for each service or feature, balancing manual testing, automation, regression coverage, and release risk.
  • Integrate AI-driven QA tooling into CI/CD pipelines to identify quality risks early in the development lifecycle.
  • Improve development efficiency and performance by identifying quality risks early and integrating QA into the development process.
  • Work closely with Software Engineers to enhance and improve programs, testability, and release quality.
  • Maintain clear test documentation, defect records, and guidelines to ensure seamless QA operations.
Moloco's standard text

How Do I Know if the Role is Right For Me?

  • Degree in Computer Science, Software Engineering, or a related field, with software-testing coursework or at least one year of software-testing experience.
  • Basic understanding of Agile/DevOps software development practices and continuous integration/continuous delivery (CI/CD).
  • Strong attention to detail with a proven ability to identify edge cases, negative scenarios, boundary conditions, and gaps in requirements through manual testing.
  • Familiarity with API testing, backend service verification, frontend testing.
  • Strong written and verbal communication skills in English and Korean.

Preferred Skills

  • Experience or strong interest in leveraging AI tools/LLM Agents for QA processes (e.g., automated test script generation, auto-healing, log analysis).
  • Familiarity with Jira or comparable test-management and issue-tracking tools.
  • Familiarity with security/penetration testing concepts.
Moloco's standard text

Supporting Your Best Work and Your Best Life:

Our benefits are designed to support our people in doing their best work and living well, at work and beyond. Benefits vary by country, employment type, and eligibility. Connect with a recruiter to learn more about benefits in your region.

Moloco Values:

  • Lead with Humility: Everyone’s voice is respected, valued, and heard. We win, lose, and learn together. Accountability and feedback are essential to our success.
  • Uncapped Growth Mindset: We see all situations as opportunities to learn, grow, and improve as individuals and as an organization. We seek diverse perspectives, encourage curiosity, and promote experimentation to push the boundaries of what’s possible.
  • Create Real Value: We pursue the most impactful opportunities with intensity and rigor. We take intelligent risks and make disciplined trade-offs to maintain deep focus. We help our customers win by delivering durable value.
  • Go Further Together: We’re one team working towards one vision. We collaborate proactively and inclusively, involving the right people at the right time and in the right way. We strive to create a more equitable workplace. We won’t let each other fail.

Additional Resources:

  • Moloco Company Blog
  • Moloco Leadership
  • Moloco Newsroom

AI Use in Interviews

Our interview process is designed to get to know the real you. Unless a round specifically includes AI as part of what's being assessed, we ask that candidates engage without AI assistance. Please review our AI Use in Interviews Policy before your interview to understand what to expect. Failure to comply with this policy may impact your candidacy.

Candidate Privacy Notice:

Your privacy matters to us. By applying, you acknowledge that you’ve reviewed our Candidate Privacy Notice.

What this role asks for

Standard for QA / testing roles

Test Automation

Common in QA / testing postings at any company.

In most of Moloco's ads

Machine Learning

Named in most of its open postings, whatever the role.

42% of this description is written for the role. The rest is Moloco's standard text, folded away below.

Compared with Moloco's other open jobs.

The team: Ads Platform HIRES STEADILY

This role is one of 3 open in Ads Platform. 2 were posted in the last 30 days and the oldest in April: a team that hires all year rather than one being built.

WHAT THE TEAM WORKS WITH, ACROSS ITS POSTINGS

Machine Learning (3 of 3), LLM (2 of 3)

OTHER ROLES ON THIS TEAM

From the team and dates on Moloco's own job board.

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