GenAI Open Source Maintainer — US Full-Time

Mercor; United States; A distancia; USD 170.000 - 243.000; Jornada completa

Descripción de la vacante

Mercor is hiring a senior open-source maintainer to join our GenAI team in the USA. You will own code review, craft realistic engineering tasks, and supervise the quality of AI training data for cutting-edge models.

You will build and test the project locally with Docker, provide precise feedback, and collaborate with experts to maintain alignment with repository standards. This is a full-time, exclusive engagement with US work authorization.

Formación

• Maintainer (named in MAINTAINERS or CODEOWNERS, or 10+ PR reviews in the last 12 months) or core contributor (3+ substantive merged PRs in the last 12 months) of a widely used open-source project.
• The repository is 2+ years old, has real users and an active code review culture, and is primarily human-written.
• Years of sustained open-source contributions, with a public history that can be verified against the candidate's own GitHub account.
• Senior-level code review judgment, including the ability to critically assess AI-written code, tests and edge cases.
• Hands-on ability to build and run the project and its test suite locally, including with Docker.
• Ability to engage reliably for 40 hours/week during weekdays on an exclusive basis: no other full-time role and no other AI training or evaluation projects, including other Mercor projects, during the engagement.
• Authorized to work in the United States on a W-2 basis.
• Able to complete any necessary background checks and confidentiality agreements before starting, and to work on a company-provided device to protect the security of information.
• Writes all rationales and feedback personally, in their own words.
• Strong written communication skills and the ability to explain complex technical decisions clearly.

Responsabilidades

• Guide research and engineering teams to close knowledge gaps and improve AI model performance in software engineering, code review, and open-source maintenance topics.
• Design challenging, realistic engineering tasks grounded in the open-source codebase the expert knows best, such as the features, refactors and bug fixes a maintainer would assign, and write accurate, well-structured reference solutions.
• Evaluate AI-written code, tests and grading rubrics against the repository's architecture, conventions and quality bar, and provide clear, written technical feedback.
• Build, run and test the project locally, including with Docker, to confirm that tasks, solutions and tests behave as intended.
• Write precise rationales that explain what a strong solution looks like and where AI-generated changes fall short.
• Collaborate with other subject matter experts to ensure consistency and accuracy in training data.

Conocimientos

Open-source maintainer

Code review

Docker

Herramientas

Docker

Descripción del empleo

Mercor is hiring a senior open-source maintainer to join our GenAI team in the USA. You will own code review, craft realistic engineering tasks, and supervise the quality of AI training data for cutting-edge models.

You will build and test the project locally with Docker, provide precise feedback, and collaborate with experts to maintain alignment with repository standards. This is a full-time, exclusive engagement with US work authorization.