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Hiring now · posted today Tech Contract · On-site / hybrid

Senior Software Engineer

$120/hr

Published pay. The final rate depends on your test, experience and country.

United States Language: English Posted 23 Oct 2026

About this role

Preparing for this role? See the best AI tools for developers, practise with ready-made prompts for developers, read ChatGPT for Developers: 15 Practical Use Cases (2026) and take the free 30-day AI challenge.

our partner is hiring Senior Software Engineers to work on a project with a leading AI research lab. You'll apply your open-source engineering experience to real software engineering work.

You're a good fit if you:

  • Work as a Senior, Staff or Principal Software Engineer (or equivalent senior individual contributor)
  • Actively contribute to open-source projects, with merged pull requests or commits in the last 6 months
  • Maintain or contribute to projects with real adoption, such as 100+ GitHub stars or clear package usage

Location: United States.

How applying works

  1. Click Apply now and enter your email.
  2. You go straight to the application. We email you a copy of this role and your link.
  3. Most platforms ask for a CV and a short skills test or AI interview in your field.
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What to know before you apply

Pay
At the published rate, 10 hours a week would be about $1,200 and 20 hours about $2,400 before tax. Hours depend on the project, so treat this as a ceiling, not a promise.
Location
Only applicants located in United States can be paid for this role. Platforms usually verify where you are, so apply only if you are based there.
Timing
This listing is new today. Projects can close once they have enough people, so it is worth applying while it is open.
Test tips for developers
  • Run the code in your head (or for real) before judging it: correctness beats style.
  • Write the smallest failing test that proves a bug.
  • Explain fixes in two or three clear sentences. Written clarity is graded too.
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    Generate unit tests for repository functions

    Write comprehensive unit tests for the following [[LANGUAGE]] function: [[INSERT FUNCTION OR PASTE CODE]]. Cover typical edge cases, null input handling, and boundary conditions using the [[TESTING FRAMEWORK]] framework. Ensure m…

    Refactoring complex legacy functions

    Act as an expert software architect. Analyze the following function in [[LANGUAGE]]: [[PASTE CODE]]. Refactor this code to improve readability, reduce time complexity, and adhere to [[STYLE GUIDE OR DESIGN PATTERN]]. Explain the …

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