Research & data
Data reports on what employers ask for in tech jobs, built from public job postings and checked by hand. Every dataset is free to download.
Reports
Which IT certifications employers ask for: 41,378 job postings
40 certifications, where they matter, gate or bonus, entry or prestige, and what the postings pay.
Frontend Developer skills: what 688 job postings ask for
React 87%, TypeScript 80%, JavaScript 54%, Web performance 44%, from 463 companies' open postings.
Full-Stack Developer skills: what 3,022 job postings ask for
React 72%, TypeScript 64%, SQL / databases 62%, Python 51%, from 1,471 companies' open postings.
Backend Developer skills: what 2,158 job postings ask for
SQL / databases 64%, AWS 49%, Java / Kotlin (backend) 41%, Python 40%, from 1,013 companies' open postings.
The most in-demand frontend stack: 688 job postings
Which frameworks, tools and add-ons employers name together, layer by layer, and how fast a full combination thins out.
The most in-demand full-stack stack: 3,022 job postings
Which frameworks, tools and add-ons employers name together, layer by layer, and how fast a full combination thins out.
The most in-demand backend stack: 2,158 job postings
Which frameworks, tools and add-ons employers name together, layer by layer, and how fast a full combination thins out.
Datasets
The numbers behind each report: every skill share with its margin of error, levels, experience, degrees, countries and salaries.
| Role | Crawled | Unique postings | Companies | Extractor |
|---|---|---|---|---|
| Frontend Developer | November 2026 | 688 | 463 | skills-v0.8 |
| Full-Stack Developer | November 2026 | 3,022 | 1,471 | skills-v0.8 |
| Backend Developer | November 2026 | 2,158 | 1,013 | skills-v0.8 |
| IT certifications | November 2026 | 41,378 | – | certs-v0.2 |
- Frontend Developer (JSON)
- Full-Stack Developer (JSON)
- Backend Developer (JSON)
- IT certifications (JSON)
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