Sr. Full Stack Developer

Overview

As a Sr. macOS / Full-Stack Developer, you'll be joining this client as they begin building the production prototype of a Computer Use Agent (CUA) – think Codex‑style assistant that lives on macOS, observes user activity, and can take actions like typing, navigating websites, and operating apps on the user's behalf.

• Build the macOS assistant prototype end‑to‑end
• Develop the front‑end/UI layer using React and Java Script
• Design and manage Docker environments for the prototype and its dependencies
• Integrate the prototype with the underlying CUA models
• Iterate quickly on prototype features based on research team feedback
• Troubleshoot and debug across the stack
• Document architecture and setup
• Collaborate with research scientists, engineers, and TPMs

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

• 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

• 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

• Master's degree in Computer Science or related field
• 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

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

The pay range for this position is $70.00 – $85.00/hr.

• 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)

This is a hybrid position in Menlo Park, CA.

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

The company is an equal opportunity employer and will consider all applications without regard to race, sex, age, color, religion, national origin, veteran status, disability, sexual orientation, gender identity, genetic information or any characteristic protected by law.

Pursuant to the San Francisco Fair Chance Ordinance, for all positions located in the city and county of San Francisco, we will consider for employment qualified applicants with arrest and conviction records.

It is unlawful in Massachusetts to require or administer a lie detector test as a condition of employment or continued employment. An employer who violates this law shall be subject to criminal penalties and civil liability.

We may use Artificial Intelligence (AI) to support parts of our hiring process, including sourcing, screening, and evaluating candidates. AI helps assess applications and qualifications, but final decisions are made by our hiring team. By applying, you acknowledge and agree that your application may be reviewed using AI tools.