SECTION I · THE BRIEF
Brief #12316Updated 22 AUG 2026SAN FRANCISCO, CAYc
Employbl Company Profile

Fullstack Engineer

Onyx is hiring a Fullstack Engineer in San Francisco, CA. Full brief — comp band, interview process, and hiring team — available to Employbl members.

Location
San Francisco, CA
Company size
—
Posted
4d ago
Via
Yc
Section II · Premium ProfileMembers only
  • 01Comp band & equity packageLocked
  • 02Seniority & experience requirementsLocked
  • 03Interview process & rubricLocked
  • 04Hiring manager & team contextLocked
  • 05Growth trajectory in this roleLocked
  • 06Offer & decision timelineLocked

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Fullstack Engineer · Onyx

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Job title
Fullstack Engineer
Job location
San Francisco, CA, US
Job description
### **đŸ’„Â Your impact** Onyx is a popular open source project with hundreds of thousands of users. The project has over 10K stars and over 3K community members across Slack and Discord (these stats may already be out of date when you read this). You’ll have the opportunity to build in the open and your work may be used by millions of people in the future. ### **💡 About the role** As an early hire, you'll play a pivotal role in shaping the core product. Help us become the biggest “GenAI for work” application in the world. **This is an in-person role based in San Francisco, CA**. You’ll be: * Building a consumer grade UI experience for the GenAI Chat, Enterprise Search, Agents, and Admin features * Extending the backend functionalities and APIs (see below) * Improving the flexibility and quality of the search pipeline, building a semantic understanding of customer organizations, extending the current permission/access controls, and expanding the knowledge curation features * Implementing the latest approaches in NLP research like LLM based Knowledge Graphs, StructRAG, Agent/Deep-Research, etc. to increase the range of questions the system can answer (AI / deep learning experience not required) * Own the entire development cycle of new features, from conception to production * Collaborate with the founders and team to shape and influence the direction of the product and contribute to the engineering strategy ### **🚀 You’ll be successful if you
** * Have 1-5 years (or more) of software engineering experience building real-world applications * Know Typescript/React/NextJS, Python, Relational DBs (Postgres) * Enjoy working in a fast moving startup with low amounts of process * Have excellent communication skills, with a strong ability to collaborate with others (both teammates and external customers) ### **⭐ Bonus points** * Experience with Docker/Kubernetes, cloud technologies (AWS, GCP, Azure), and on-prem/cloud deployments * Experience (or even just interest) in AI (NLP, Deep Learning, GenAI) and information retrieval * Previous founder or early engineer at seed/series-A startup ---
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Where this role is based

San Francisco, CA

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