We are looking for Open Source Maintainer / Core Contributor – Software Engineer candidates for a project delivered through the hiring partner.

What you'll do

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.

What you need

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.
Hands-on ability to build and run the project and its test suite locally, including with Docker.
Ability to commit 30–40 hours/week as your primary work focus, with availability for occasional meetings with the lab's researchers. Given that time commitment, this role isn't a fit alongside a full-time job.
Exclusivity: no work with another AI lab or AI training company, including other the hiring partner projects, during the engagement.
Authorized to work in the country you live in.
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.

Also listed: written communication.

Project and contracting process: the hiring partner. Applications continue on the provider's website.

This role pays $150/hr, for 40 h/week. The work is remote. That is about 88% above the $80 an hour median for software roles open now.

Open to candidates in United States. With a profile, Tier1 checks your country and languages against this role and every other before you apply.