Sr. Full Stack Developer

About the role

Join this client as they begin building the production prototype of a Computer Use Agent (CUA) — a macOS-based assistant that observes user activity and takes actions on their behalf, akin to Codex-style tools.

Responsibilities

• Build the macOS assistant prototype end-to-end
• Develop the front-end/UI layer using React and JavaScript
• Design and manage Docker environments for the prototype and its dependencies
• Integrate the prototype with the underlying CUA models
• Troubleshoot and debug across the stack
• Document architecture and setup
• Collaborate with research scientists, engineers, and TPMs

Requirements

• Bachelor's degree in Computer Science or related field
• 6+ years as a software engineer
• Strong macOS development experience
• Proficient with Docker
• Strong React and JavaScript skills
• Comfortable with Linux and shell scripting
• Excellent problem-solving skills and attention to detail
• Strong communication and collaboration skills
• Ability to work independently and in a team environment

Skills

• MacOS Development
• Docker
• React and JavaScript
• Desktop Application Development
• Prototype Development
• Electron
• Swift/Objective-C
• Accessibility APIs
• Screen Capture APIs
• LLM/Agent Framework Exposure
• System-Level Scripting

Additional Skills & Qualifications

• Bachelor's degree in Computer Science or related field (Master's degree preferred)
• Electron or other cross-platform desktop framework experience
• Swift or Objective-C experience
• Familiarity with macOS accessibility / automation APIs
• Exposure to LLM-powered agents or Codex-style tools

Job Type & Location

This is a Contract position based out of Menlo Park, CA.

Pay And Benefits

The pay range for this position is $70.00 - $85.00/hr. Eligibility requirements apply. Benefits are subject to change and may depend on your job classification and length of employment. If eligible, the benefits available for this temporary role may include:

• Medical, dental & vision
• Critical Illness, Accident, and Hospital
• 401(k) Retirement Plan – Pre-tax and Roth post-tax contributions available
• Life Insurance (Voluntary Life & AD&D for the employee and dependents)
• Short and long-term disability
• Health Spending Account (HSA)
• Transportation benefits
• Employee Assistance Program
• Time Off/Leave (PTO, Vacation or Sick Leave)

Workplace Type

This is a hybrid position in Menlo Park, CA.

Application Deadline

This position is anticipated to close on Jul 10, 2026.