Frequently Asked Questions

Stars indicate how important a skill is based on multiple factors:

• Essential vs Optional — Essential skills start with a higher base rating
• Learning resources available — Skills with book recommendations score higher
• Cross-profession demand — Skills used by many professions (10+) are rated higher as they're more transferable

A skill with 5 stars is essential, widely demanded, and has solid learning resources.

Our career and skill data comes from ESCO — a European database of over 3,000 careers and 13,000+ skills used by employers worldwide.

Book recommendations are carefully matched to each skill based on relevance and learning value.

Essential skills are core requirements — you'll need these to do the job effectively. Most job postings will expect these.

Optional skills are nice-to-haves that can differentiate you or help you specialise. They may appear in some job postings but aren't universal requirements.

Knowledge knowledge is what you know — facts, concepts, and information like programming languages or accounting principles. Books are great for learning knowledge.

Skills skill are what you can do — abilities you develop through practice like debugging code or negotiating contracts. Hands-on practice and courses work best for building skills.

Language language means which languages are needed for a job — like English, French, or Mandarin.

Language Skill language skill means using a language for a specific purpose — like technical writing in English or medical interpreting in Spanish. It's the practical application of a language in your work.

We're always adding new professions. Use the contact form below and select "Request a profession" to let us know which one you'd like to see.

If you're signed in, you can also request it from your profile page — look for the profession search field under your current or target profession.

ESCO publishes major updates annually. We sync with the latest release and continuously improve our book recommendations as new resources become available.

No. The skills listed on Proskiro come from formal competency frameworks and represent the knowledge and abilities associated with each profession. However, years of hands-on experience applying these skills in real situations is what truly sets professionals apart.

Think of Proskiro as a map — it shows you where to go, but the journey itself is what builds real expertise. Someone with 10 years of experience will always bring depth that no checklist can capture.

Proskiro organises skills into four progressive levels:

🌱 Foundations — Entry-level competencies, typically acquired in the first 1–2 years through education or early work experience.

🔧 Practitioner — Working knowledge most professionals develop after 2–5 years of hands-on practice.

⭐ Specialist — Advanced proficiency usually built over 5–10 years of focused experience in the field.

🚀 Expert — Unlocks after completing all essential skills. Covers optional, niche competencies that distinguish senior professionals with 10+ years of experience.

These timeframes are rough guides — progression depends on the profession, individual effort, and depth of practice. Someone working intensely in a focused area may reach Specialist level faster, while a broader role might take longer.