Software Engineer - Backend Specialist - AI Trainer

Mercor; San Francisco (CA); On-site; USD 100,000 - 140,000; Full time

Job summary

Obsidian is hiring Software Engineers in San Francisco to build and ship applications for Mercor’s RL Studio platform. This role includes developing MCP servers and integrating web or desktop applications into the platform.

The ideal candidate will have strong Python skills, experience with Docker and Linux, along with the ability to work with APIs and develop stable applications for deployment.

Qualifications

• Strong skills in Python programming.
• Experience with backend systems and API development.
• Familiarity with Docker and Linux environments.

Responsibilities

• Build MCP servers in Python using FastMCP.
• Integrate applications into RL Studio.
• Test and debug applications in sandbox environments.

Skills

Python skills

APIs

Debugging

Docker

Linux

Problem-solving

Tools

FastMCP

APIs

Job description

Role Overview

We’re hiring Software Engineers to build and ship apps for Mercor’s RL Studio platform. The role involves developing MCP servers and sometimes BUAs, integrating real software into sandbox environments, and ensuring apps are stable, testable, and production-ready.

What You’ll Do

• Build MCP servers in Python using FastMCP
• Integrate web or desktop applications into RL Studio
• Work with APIs, Docker, Linux environments, and service configuration
• Implement populate/snapshot hooks for app state management
• Test apps locally and debug build, runtime, and permission issues
• Ensure apps meet platform validation and deployment requirements

What We’re Looking For

• Strong Python skills
• Experience with APIs, backend systems, and debugging
• Familiarity with Docker, Linux, and local testing workflows
• Ability to work with configuration files and deployment pipelines
• Problem‑solving skills and attention to technical detail

Nice to Have

• Experience with FastMCP or similar frameworks
• Experience integrating third‑party apps or developer tools
• Familiarity with web apps, databases, and containerized environments