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Founding Engineer; Backend

Job in San Mateo, San Mateo County, California, 94404, USA
Listing for: OpenMart
Full Time position
Listed on 2026-06-27
Job specializations:
  • IT/Tech
    AI Engineer (Applied/Software), Machine Learning/ ML Engineer
Job Description & How to Apply Below
Position: Founding Engineer (Backend)

Founding AI Engineer

Openmart is currently seeking a Founding AI Engineer with experience in search engine and AI agents. We are building a Google-like search engine for B2B unstructured data (similar to Perplexity) and seeking candidates with in-depth understanding of AI (Lang Chain, OSS models, tool/function calls, RAG, prompt-tuning, evals etc.)

Our team leader is innovative and supportive, fostering a culture of continuous learning and collaboration. They encourage open communication and provide regular feedback to help team members grow.

We expect the team to be in person at our Foster City office.

We are Openmart, dedicated to creating the world's largest real-time directory of local businesses. We assist sales professionals in querying millions of unstructured business data, including websites, product catalogs, reviews, and social media information. Openmart is backed by Y Combinator, execs at Door Dash, Square, Instacart, and top venture capital firms. If you are passionate about joining us, please get in touch.

  • Opportunity to play a key role in a startup backed by top investors
  • Solve real-world problems, improving business data querying and utilization through technology
  • Work in a vibrant, innovation-driven environment, growing alongside a talented team

Requirements:

  • Able to start fulltime immediately
  • You are looking for high impact, high ownership role building something meaningful.
  • Backend: Proficient in FastAPI/Django/Flask, Celery/RabbitMQ and Supabase/Postgres
  • AI: Proficiency in Langchain, RAG, embeddings, multi-step AI agents, AI agent evals & finetune
  • (Preferred) Search Algorithm Technology: Experience in search engine development, familiarity with re-ranking algorithms, embedding algorithms, fuzzy search, word2vec
  • (Preferred) Startup Experience: Experience leading significant projects in startup environments
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