Software Engineer - Marketplace

Software Engineer - Marketplace (Growth Infrastructure)

Company: AfterQuery
Location: San Francisco, CA (FiDi office, Monday-Friday; half day or remote on Sunday)
Compensation: $250,000 - $300,000 base ($300,000 - $400,000 OTE) + competitive equity
Employment Type: Full-time
Visa Sponsorship: Visa transfers (OPT, H-1B transfer)

About AfterQuery

AfterQuery builds the complex data infrastructure that frontier AI labs use to train and evaluate their models, and is becoming the go-to data infrastructure partner for Y Combinator companies. It has a talent-dense founding team from top investment banks and quant firms.

Founded in 2024 with about 85 people in San Francisco, AfterQuery recently raised at a $3.2B valuation, 10x its valuation in five months, making it the fastest unicorn in YC history.

The Role

AfterQuery is hiring a Software Engineer (2+ years) to build the core infrastructure behind expert acquisition, onboarding and matching at scale. This is not a traditional growth engineering role: you will build the platform and tooling the growth team uses to hire, assess, interview, onboard and retain domain experts, from outreach tooling and an AI interviewer to automated expert-to-project matching, with a path to building ML-driven recommendation systems.

What You Will Do

• Build and own the expert marketplace infrastructure: outreach, AI interviewing, assessments and onboarding tooling.
• Develop the hiring platform where experts are onboarded, managed and dispatched to projects by fit and availability.
• Create automations and internal tools that replace manual workflows and multiply the growth team's throughput.
• Partner with growth associates to find bottlenecks, instrument the funnel and ship high-leverage improvements.
• Eventually build ML-driven recommendation systems that predict expert needs for new projects.

What You Bring

• 2+ years of software engineering experience
• Full-stack skills across TypeScript/JavaScript, Next.js, React, Node.js and Python
• Comfort owning systems end to end with significant autonomy
• Ability to work in the San Francisco office Monday-Friday

Tech Stack

TypeScript/JavaScript, Next.js, React, Node.js, Python, Kubernetes, Kafka, Redis, Elasticsearch, AWS, GCP

REVENUE: 17% of first-year salary. Est. fee per hire $43K-$51K; 4 seat(s) = up to $187K if all filled.

TARGET COMPANIES (suggested): Scale AI, Surge AI, Mercor, Snorkel AI, Jane Street, Citadel, Hudson River Trading. DO NOT SOURCE: OpenAI (client do-not-source rule).

BEST-FIT CANDIDATE: 2+ yrs; full-stack TS/Python; end-to-end ownership; visa: transfers only (OPT, H-1B transfer); location: SF M-F. Client rule: do NOT source anyone currently at OpenAI.