Human Delta: Full Stack Engineer (Backend-Leaning)

• →Build the backend systems powering an agent evaluation and continuous-improvement platform.
• →Shape the data models behind evaluation datasets, experiment runs, agent traces, knowledge versions, and customer-defined quality criteria.
• →Own enterprise integrations end to end: authentication, OAuth, webhooks, incremental syncs, backfills, rate limits, schema changes, retries, monitoring, and production support.
• →Own features from technical design through deployment, monitoring, customer feedback, and iteration.
• →Work directly with customers to diagnose failures and turn one-off needs into reusable product capabilities.

Tech stack: Python, TypeScript, distributed systems, enterprise integrations; relational and vector databases.

• 2-4 years of experience as a backend-leaning full-stack software engineer.
• A track record of building and running production systems used by enterprise customers.
• Professional, hands-on experience with TypeScript.
• Genuine full-stack comfort across both backend and frontend, with Python as the primary backend language.
• Experience at an early-stage startup (roughly under 50 people) with real, hands-on ownership.
• A bachelor's degree in Computer Science or a closely related field.
• Authorization to work in the US as a citizen, green card holder, or on OPT with several years of runway remaining. This role does not offer visa transfer or sponsorship.

• A background as a founder, or an active hackathon builder.
• Prior exposure to agent evaluation, LLMs, or evals/QA work.

• Location: San Francisco, CA
• Work policy: On-site, Monday to Friday; no required travel
• Compensation: $120,000 - $200,000 + equity
• Visa sponsorship: Not available (US citizen, green card, or OPT with multiple years remaining)
• Employment type: Full-time