Product Engineer

About The Role

In education, we have always traded off scale and quality. In a 30-student math class, half of kids are ready to accelerate while half are still working on their foundational skills, but teachers cannot be in 30 places at once, giving each student one-on-one support. Until now. Imagine 30 teachers in every classroom—that's how Goblins feels. Students draw math on any device, and our AI figures out the “why” behind their confusion, giving instant feedback and building conceptual foundations. We're backed by the Gates Foundation, and we're on track for 300,000 active students next year. We're hiring a product engineer to help us get there, and to make sure everything we've built holds up at that scale.

Responsibilities

• Scale our real-time teacher avatars to 300k students.
• Make them run smoothly at scale while cutting latency and cost, and think hard about reliability from every angle: Chromebook CPU, low-bandwidth classrooms, and the load spike when a whole district logs on at 9am.
• Keep every classroom in real-time sync at 300k concurrent students.
• Build the machinery to pin a model for a cohort, roll it out gradually, watch the metrics, and roll back fast, all clean enough that we can hand the whole experiment loop off to an agent and let it run.
• Give teachers instant, reliable insight across thousands of simultaneous classrooms.
• Create shareable “aha moment” artifacts from real student sessions.

Requirements

• Experience with real-time sync engines like Linear.
• Strong understanding of TypeScript and Effect-TSA.
• Knowledge of Bun and Postgres.
• Experience with agentic development and remote dev environments.

Qualifications

• Passionate about education technology.
• Experience with AI-driven educational tools.
• Ability to work in a fast-paced, agile environment.

Skills

• Real-time sync and scalability.
• TypeScript and Effect-TSA.
• Bun and Postgres.
• Agentic development and remote dev environments.

Benefits

• Work in a dynamic, innovative startup environment.
• Opportunities for growth and impact in education technology.
• Competitive compensation package.

Pay

• Competitive salary based on experience.

Schedule

• Full-time position.