Fullstack Engineer, Assesment

Responsibilities

• Design, build, and ship backend services and APIs that power Mercor's assessment platform at scale.
• Own features end-to-end—from product discussions and technical design to implementation, testing, and release.
• Build evaluation pipelines and data models that combine human judgment with AI-powered scoring.
• Contribute across the stack, including the candidate- and expert-facing product surfaces of assessment flows.
• Partner closely with Product, AI, and Data teams to translate assessment research into production systems.
• Leverage modern AI coding tools to accelerate development while maintaining a high engineering bar.
• Improve the performance, reliability, and observability of assessment infrastructure.
• Solve real customer problems and continuously improve candidate and expert experience.

Requirements

• 3+ years of professional software engineering experience building production systems.
• Strong backend fundamentals: API design, data modeling, distributed systems, and relational databases.
• Comfortable working across the stack, including modern frontend frameworks (e.g. React/TypeScript) when the product needs it.
• Strong software engineering fundamentals, including testing, debugging, and performance optimization.
• Excellent product intuition—you enjoy building products that people actually use.
• Comfortable working in fast-moving environments with evolving priorities.
• High ownership, curiosity, and a bias toward shipping.

Nice-to-Haves

• Experience building or integrating LLM-powered features in production.
• Comfortable building products using modern AI development tools (e.g. Cursor, Claude Code, GitHub Copilot, Codex, or similar) to accelerate software development.

Compensation and Benefits

• Bi-annual performance bonus structure.
• Generous equity grant vested over 4 years.
• Up to $15k Relocation bonus.
• $10K proximity bonus (if you live within 0.5 miles of our office).
• $1.5K monthly stipend for meals.
• Free Equinox membership.
• $200 monthly laundry reimbursement.
• $200 monthly personal wellness reimbursement.
• Health, Dental, Vision insurance.