Eleftheria Batsou

Developer Advocate at Cosine

Community builder, UX, speaker, content creator. Based in Thessaloniki, Greece.

Get in touch Upcoming talks
Eleftheria Batsou speaking

About

I'm a developer advocate and community manager with a front‑end and UX background. I research, build developer communities, create content, and speak at conferences. Since 2017 I've been working across development, design, and community—always learning and sharing.

Previously at Vue School, CrabNebula, and Hashnode. Side projects include YouTube videos, articles, and mentoring code newbies.

Work

Cosine

Developer Advocate — Building community, creating technical content, and helping developers succeed with AI tooling.

cosine.sh

Vue School

Community & DevRel — Strategies, content, partnerships, events.

vueschool.io

CrabNebula

Community & DevRel — Developer experience, content, and outreach.

crabnebula.dev

Hashnode

Community — Programs, content, and events for developer writers.

hashnode.com

Speaking

I love sharing ideas with developer communities. Highlights:

  • Shift Conference (Croatia), Web Summer Camp (Croatia), JNation (Portugal), Infoshare (Poland)
  • Voxxed Days (Greece, Romania), NDC (UK, Norway, Portugal), WeAreDevelopers (Germany)
  • Build Stuff (Lithuania), CityJS (Greece, Serbia), JS Day (Italy), ConfrontJS (Poland)
  • Program committee: VoxxedDays Thessaloniki, Frontend Nation, JSNation

Upcoming events

See schedule Talks playlist

Writing

Dev.to Hashnode Medium CodePen

Projects

100 Days of Code

My public learning journal and commitment to consistent coding.

GitHub repo

Daily CSS Images

Creative CSS art and visuals, experimenting with layout and design.

GitHub repo

Hangman Game

A classic Hangman game app — simple, fun, and built for the web.

GitHub repo

Sudoku

Sudoku game implementation — logic, UI, and gameplay.

GitHub repo

Contact

For speaking invitations, collaborations, and community initiatives:

Book a call DM on X Message on LinkedIn