Careers at Happenstance

Help us create luck

We're reshaping how humans find each other. If you move fast, are curious, and have a good sense of humor, we'd love to meet you.

Every role is full-time and based in San Francisco.

Full-time · San Francisco

AI Engineer

Make our People Intelligence smarter. Optimize embedding pipelines, fine-tune models, and deeply integrate LLMs into our product.

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You might work on

Optimizing our search pipeline with better retrieval and ranking
Running experiments to improve relevance and accuracy
Integrating new LLM capabilities into the product
Building evaluation frameworks to quantify search accuracy and research quality
Applying experience with LLM fine-tuning, AI research, or prompt engineering

Tech stack

PythonVector databasesOpenAIRAGEmbeddings

Full-time · San Francisco

Backend Engineer

Build the reliable systems behind our search and agent infrastructure. Own foundational architecture, remove bottlenecks, and help us scale with confidence.

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You might work on

Building core data indexing and ingestion pipelines for new data sources
Owning infrastructure as code with Terraform or OpenTofu and workflow orchestration with tools like Hatchet or Temporal
Giving AI agents safe, autonomous access to AWS, GitHub, orchestration, and other backend systems through least-privilege controls and clear, auditable boundaries
Identifying performance optimizations and scaling bottlenecks proactively
Building integrations with third-party services

Tech stack

PythonPostgresDynamoDBAWSTerraformHatchetAPI design

Full-time · San Francisco

Design Engineer

Design and ship new ways for users to create luck for themselves and the people they care about. Develop a deep understanding of what users want, prototype ideas quickly, and ship high-quality products.

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You might work on

Owning the frontend of our website and integrations
Crafting delightful and reusable React components
Creating conversion funnels and A/B testing onboarding flows
Applying experience with graphic design, video production, or iOS development

Tech stack

Next.jsVercelTailwindshadcn/uiTanStackPostgres

Don't see the right role?

Tell us what you'd love to work on at careers@happenstance.ai.

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