Fullstack Software Engineer, Agent Platform
Mercor · San Francisco
CHECKED 22H AGO
Applied AIonsitemid-level$160k–$500k
At a glance
Highlights
- Own the core agent platform used daily internally and demoed live to clients.
- Build the foundational layer teams use to launch new agent use cases fast.
- Ship high-leverage features that boost internal productivity and client quality.
What they offer
- Bi-annual performance bonus structure
- Generous equity grant vested over 4 years
- Up to $15k relocation bonus
- $10K proximity bonus if within 0.5 miles of office
- $1.5K monthly stipend for meals
- Free Equinox membership
- $200 monthly laundry reimbursement
- $200 monthly personal wellness reimbursement
- Health, Dental, Vision insurance
Ideal candidate
High-ownership builder who cares equally about craft and product impact, with strong user empathy and comfort navigating ambiguity to ship polished, reliable platforms in a fast-paced team.
Requirements
- 2+ years of fullstack engineering experience building and shipping production software
- Deep proficiency in JavaScript/TypeScript (React + Next.js) and frontend architecture, state management, and design patterns
- Solid backend experience in Python and/or Node.js — relational databases, REST APIs, and async task infrastructure
- Strong design sense and empathy for end-users with high bar for usability
- Experience with complex, high-throughput systems — pipelines, large data volumes, or multi-tenant architectures
- High ownership mindset; able to navigate ambiguity and drive projects from design through delivery
- Strong communication skills and ability to articulate technical and product tradeoffs clearly
- remote policy
- In-person 5 days a week
Lab profile
About Mercor
AI data company organizing human expertise to train frontier models for the AI economy.
What they build
- APEX benchmark family
- Mercor Enterprise
- Human expertise training data platform
Known for
- Massive domain-expert network
- Frontier model training infrastructure
- Real-world professional work evaluation
Key facts
- Millions of domain experts on platform
- Pays over $4M per day to experts