Full-stack developer

Tagged as: Remote &Sofia

hack’s Sofia office is growing, and we will be happy to onboard a person who is enthusiastic to learn and eager to deliver quality code.

The developer will work closely with the blockchain department lead to design, build, and contribute towards the company’s projects.

Key Responsibilities:

  • Design and develop robust backend code and microservices.
  • Design and develop frontend applications.
  • Develop blockchain-related features – smart contracts, wallets, etc.
  • Write high quality, reusable code, prevent vulnerabilities.
  • Write unit, functional, and integration tests
  • Code reviews.
  • Effective written and verbal communication and presentation skills.

Knowledge, Skills, Abilities, and Competencies:

  • Proficiency with relational and non-relational databases.
  • Proficiency with JavaScript / Node.js.
  • Experience with other backend technologies and languages (e.g. Go, Java, Rust, PHP).
  • Experience with Vue.js/Angular/React framework.
  • Proficiency with build tools like Webpack and Gulp.
  • Experience with AJAX, CSS and HTML skills.
  • Proficiency with version control systems (Git).
  • Troubleshooting experience.
  • Fluent English.

Bonus points

  • Interest in blockchain technology.
  • Experience with Solidity.

What we offer:

  • Opportunity to build an exciting product with global reach and huge potential.
  • Opportunity to have a big impact on the product vision and the company as an early employee.
  • Opportunity to get commercial experience in development for many different blockchains and cryptocurrencies including, but not limited to Bitcoin, Ethereum, Cosmos, Polkadot, Polygon.


As well as the opportunity to solve complex problems, we like to look after our fellow teammates, so you’ll get:

  • Flat organization.
  • Transparent and open-minded company culture.
  • Flexible hours, remote work.
  • A relaxed approach to time off and enough holidays to see several corners of the world.
  • Cool office atmosphere and team.
  • Plenty of opportunities for training, courses, and development.
  • Travel and participation in conferences.
  • Healthy snacks and food in the office.
  • Sports club membership.
  • Teambuildings and parties.