Role Overview
Upwork is hiring a mid-level JavaScript Developer Needed for Browser-Based Simulation Game Extension. This is a contract remote role, with the team based in Remote. Full responsibilities, required qualifications, and the apply link are listed in the description below.
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Job Description
I’m looking for a pragmatic JavaScript developer who can understand and extend an existing browser-based simulation game built with vanilla JS, D3.js, and Firebase. The focus is on implementing new game logic and features within the current codebase—cleanly, incrementally, and without rewriting existing functionality.
Frequently Asked Questions
How do I apply for the JavaScript Developer Needed for Browser-Based Simulation Game Extension position at Upwork?
Use the Apply button above to submit your application directly to Upwork. Most applications take less than 5 minutes if your resume and contact details are ready, and you'll be routed to the employer's official application system to finish.
Is the JavaScript Developer Needed for Browser-Based Simulation Game Extension role at Upwork remote?
Yes. This is a remote role. The team is based in Remote, but the position itself does not require relocating to that office.
What does a JavaScript Developer Needed for Browser-Based Simulation Game Extension at Upwork earn?
Upwork has not disclosed a salary range in this posting. Many employers share specifics later in the interview process; you can also ask during a recruiter screen if compensation transparency is important to you.
When was the JavaScript Developer Needed for Browser-Based Simulation Game Extension role at Upwork posted?
This role was posted on April 26, 2026 (49 days ago). It's still listed as actively hiring; we re-confirm openings against the source system multiple times per day and remove closed roles.
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