About the Role
This is a founding engineering role at an early-stage consumer social tech startup building AI-powered in-person social experiences for young people. You'll sit at the heart of the product, owning the two systems that make everything work: intelligent group matching and multi-channel AI agent communication. The work is technically deep and directly shapes how people form real-world friendships at scale.
What You'll Do
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Design and build a real-world social graph using collaborative filtering, embeddings, ranking systems, and reinforcement learning from live interaction outcomes.
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Develop large-scale personalization and group-matching algorithms that continuously improve based on real-world friendship signals.
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Architect and maintain multi-channel AI agent workflows across major consumer messaging platforms (SMS, Instagram, WhatsApp, and others).
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Orchestrate a suite of AI agents handling end-to-end user journeys — onboarding, profiling, matching, logistics, reminders, and follow-ups.
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Build scalable backend infrastructure connecting messaging APIs, third-party services, and the core data layer.
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Contribute to human-AI interaction design, making agent experiences feel natural and effortless for users.
What We're Looking For
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Proven, hands-on experience building AI/ML systems in production environments.
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Full-stack comfort spanning data pipelines through to user-facing AI interactions.
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Familiarity with multi-channel messaging APIs and modern AI agent frameworks.
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Experience with recommendation systems, social graphs, or large-scale personalization is a strong plus.
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Founding-engineer mindset: you ship fast, take end-to-end ownership, and stay composed in ambiguity.
Compensation & Benefits
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Salary: $150,000 – $200,000 per year
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Equity: Founding-level equity package
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Visa sponsorship: Not available
Location
On-site in San Francisco, California, United States. This is an in-person role working alongside the founding team.