The category comes from the role title, by the same rule on both sides of the board — nobody picks their own and nobody can pay to change one. The bidjob rank is recomputed inside each category, so a company's best backend job leads the backend list even if it never reaches the front page.
| Category | Open postings | Paid listings | Top bid | Claim #1 |
|---|---|---|---|---|
| General software Engineering roles whose title doesn't name a specialism. |
442 | 0 | — | $10 |
| Infrastructure & SRE Platform, reliability, cloud, and everything that keeps it up. |
289 | 0 | — | $10 |
| ML & AI Machine learning, applied research, inference and model serving. |
196 | 0 | — | $10 |
| Backend Services, APIs, and distributed systems behind the product. |
186 | 0 | — | $10 |
| Security Product and infrastructure security, cryptography, identity. |
130 | 0 | — | $10 |
| Full-stack Roles that own the whole path from the browser to the database. |
81 | 0 | — | $10 |
| Frontend Browser-side engineering: interfaces, design systems, web performance. |
60 | 0 | — | $10 |
| Data engineering Pipelines, warehouses, streaming, and the databases underneath them. |
58 | 0 | — | $10 |
| Mobile iOS, Android, and cross-platform app engineering. |
24 | 0 | — | $10 |
| Systems & embedded Firmware, kernels, drivers, compilers, and low-level runtimes. |
1 | 0 | — | $10 |
A listing sits in one category, in its own right-hand column, and on the whole-board list on the front page. One bid, both places.