Software Engineer, Platform
Builds secure, scalable backend systems for contracts, payouts, fraud detection, and identity/access management on Mercor's AI platform. Requires 4+ years experience with production systems at scale and strong ownership.
Software Engineer, Automation
Builds autonomous agent systems for internal operations using Python and LLM APIs, including MCP servers, evaluation frameworks, and workflow orchestration. Owns end-to-end backend infrastructure with focus on reliability and real-world impact.
130k – 500kSan Francisco, CABackend EngineeringOnsite
About the role
What You’ll Do
- Build and maintain MCP servers that give agents structured access to Mercor’s platform — reading project state, taking management actions, and triggering communications.
- Design and implement evaluation frameworks to measure agent decision quality and drive continuous improvement through feedback loops.
- Develop action queues and playbook orchestration systems that allow agents to execute multi-step workflows with conditional logic.
- Instrument agent systems end-to-end — capturing outcomes, closing feedback loops, and enabling hill-climbing on eval metrics.
- Collaborate directly with operators to identify high-leverage automation opportunities and translate them into robust agent behaviors.
- Debug and harden agent systems in production, designing for reliability at scale.
- Contribute to foundational patterns and infrastructure that the rest of the company will build on.
What We’re Looking For
- Strong backend engineering fundamentals in Python (or equivalent modern language).
- Experience building with LLM APIs — including tool use, structured outputs, and multi-step reasoning workflows.
- Comfort designing evaluation frameworks and thinking rigorously about agent failure modes.
- Ability to ship quickly and iterate on systems that interact with the real world.
- Understanding of distributed systems, APIs, and production infrastructure.
- Full-stack experience is a plus — owning features end-to-end will increase your impact.
Benefits
- Generous equity grant vested over 4 years
- A $10K housing bonus (if you live within 0.5 miles of our office)
- A $1.5K monthly stipend for meals
- Free Equinox membership
- Health insurance
Skills
PythonLLM APIsDistributed SystemsAPIsProduction InfrastructureMcp ServersEvaluation FrameworksAction QueuesPlaybook OrchestrationObservability
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