Fullstack Engineer(Next.js/React, Node.js/Python)
One week you might prototype a new RL environment from a research paper, the next you’ll be deploying distributed experiments on Kubernetes, and the week after you’ll be improving the reliability of our Next.js dashboards or building a Kafka pipeline for annotator analytics.
What You’ll Do
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Design and build scalable systems: RL environments, APIs, and human-in-the-loop platforms.
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Collaborate across research, product, and design to ship features quickly.
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Write clean, maintainable code and contribute to documentation.
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Participate in code reviews and design discussions
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Solve real-world scalability and reliability challenges.
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Contribute to the core infrastructure powering data and evaluation for leading AI labs.
Tech stack
TypeScript/JavaScript, Next.jS, React, Node.js, Python, Kubernetes, Kafka, Redis, Elasticsearch, Cloud Platforms: AWS, GCP
Work experience(must have!)
1 - 3 years of experience as a fullstack SWE
Experience at S-tier VC-backed startup, reputable trading firm, or founding engineer at company that has raised $2.5M+. If big tech only, must have CS degree from top-10 CS program (e.g., Berkeley, CMU).
If candidate comes from a startup, startup MUST be HIGH GROWTH
Degree from top-30 school.
Fullstack capability: Next.js/React, Node.js/Python, Kubernetes
Experience building something end-to-end with a bias towards ownership
Willing to work 5 days a week (M-F) and half-day or remote on Sundays in our FiDi (SF) office .
Why candidates should join
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AfterQuery is collaborating with all 5 leading AI labs (OpenAI, Anthropic, Google, Meta, Amazon)
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Candidates will recommend data and infrastructure that shapes next-generation agentic workflows, focusing on the hardest, most advanced problems to solve (not commodity)
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Work at a larger scale than most AI companies: Currently 8 figure revenue with hockey-stick growth trajectory
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Candidates will have outsized impact, shaping core systems from day 1
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Talent dense team with founders from top quantitative finance (Citadel Securities) and IB/PE (Goldman Sachs, Morgan Stanley, Silver Lake)
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YC Winter 2025: $3M raised, $40M cap, expecting $20-30M Series A shortly
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Fast-paced culture with open-communication and quick iteration and a tight-knit team that likes each other
