coss.work

Get paid to work on open source.

coss.work is a free job board for engineering roles at commercial open-source (COSS) companies. Search by the stack you want to work with, compare companies and apply on their own site.

How it works

• Only companies whose core product is open source are listed.
• Each company is one JSON file in this repo, in app/data/companies/.
• Companies add and update their listings by pull request. A validator checks each change.
• It is free for job hunters, and it is free for companies to post.

Post a job

1. Copy app/data/SAMPLE_COMPANY_TEMPLATE.json to app/data/companies/<first letter>/<slug>.json. The slug can use only lowercase letters, digits and dashes.
2. Fill in your company and your open roles. Keep the "$schema" line so that your editor can autocomplete the fields. Its path is already correct for the folder you copied the file into.
3. Set updated to the current time in ISO 8601 format, for example 2026-09-19T12:00:00.000Z. Listings show newest first.
4. Optional: run bun run validate:companies to check the file locally.
5. Open a pull request. The Validate companies check marks errors on the matching lines under "Files changed".

To update or remove a listing, click edit on your company page, or change or delete the file in a pull request.

Company fields

All fields are required unless marked optional.

Field	Value
name	Company name
url	Company website
at	Short label, for example "jobs"
building	What the company is building, in 5 words or fewer
products	List of { "name", "url" }
socials	Profile URLs, for example https://github.com/<org>
offices	Ids from locations.json, plus "remote"
headcount	Optional. Whole number
founded	Optional. Year
jobs	At least one job (see below)
updated	ISO 8601 timestamp of the last edit

Job fields

Field	Value
position	Id from positions.json
category	frontend, backend, full-stack, mobile, devops, data, security, systems
level	any, junior, senior, staff
type	full-time, part-time, contract, freelance
tech	Ids from tech.json
url	Where to apply
salary	Optional. { "amount": [min, max], "range": "yearly", "currency": "usd" }
equity	Optional. [min, max] in percent

range can be yearly, monthly or hourly. currency can be usd, eur, gbp, cad, aud, chf or inr. company.schema.json has the full rules.

FAQ

Is it free?

Yes. Job hunters never pay, and posting a listing is always free.

Which companies can post?

Companies whose core product is open source.

Must I show a salary or equity?

No. Leave salary and equity out if they are not public.

How are listings ordered?

By updated, newest first.

Can I get job alerts?

Not yet. Email alerts by tech stack are planned.

A listing is wrong or out of date. What do I do?

Open a pull request with the fix, or open an issue.

My tech, position or office is not in the list.

Add it to tech.json, positions.json or locations.json in the same pull request.

Can I use the data?

Yes. See Attribution.

Attribution

The listing data in app/data/ is free to use. If you use it, credit coss.work by name and link:

Data from [coss.work](https://coss.work)

Development

Built with Remix 3, Vite+ and Cloudflare Workers. Uses bun 1.4.2 and Node 24.3 or later.

bun i
bun run dev                 # start the dev server
bun run build
bun run preview
bun run test
bun run typecheck
bun run check               # format, lint and type check
bun run validate:companies  # check the company files

See AGENTS.md for the code layout.

Deploying

Cloudflare Workers Builds deploys every push to main. A failed build does not deploy. Set it up once in the Cloudflare dashboard:

1. Go to Workers & Pages, open the coss-work Worker, then Settings → Builds → Connect. If the Worker does not exist yet, use Create → Import a repository and name it coss-work. The Worker name must match name in wrangler.jsonc.
2. Pick the aureliushq/coss.work repository and the main branch.
3. Set Build command to bun run build. Keep the default Deploy command, npx wrangler deploy.
4. Under Build variables, add BUN_VERSION = 1.4.2 to match devEngines in package.json.
5. Keep Builds for non-production branches on. Other branches run npx wrangler versions upload, which uploads a preview version without touching production, and Cloudflare posts the preview URL on the pull request.