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Senior Fullstack Javascript Developer

Dear Candidate,

You’ll have a chance to work on Zbay, an innovative desktop app which is an attempt to build a secure, decentralized substitute for team chat tools like Slack, Discord, or Keybase. 

The goal is to achieve a similar level of usability and reliability to centralized tools, while reducing or outright eliminating risks from phishing attacks, malware attacks, and large-scale data breaches. 

Zbay also integrates the privacy-focused cryptocurrency Zcash. Users can send and receive Zcash, register names for users and communities on the Zcash blockchain, and—potentially, in the future—purchase additional services such as persistent encrypted storage. 

Zbay is using Electron framework. This implies NodeJS for the OS-side of it. For the frontend-side we are using a combination of React + Redux + Material UI. We have recently made a push to move our codebase from Javascript to Typescript.

Nowadays we are also doing a lot of work involving Tor v3 Onion Services and Libp2p.

 Zbay supports Linux, macOS and Windows. It is cross-compiled to each of these platforms using Github Actions.

Zbay is open source. You can find the code repository here.


13,000 – 19,000 PLN net on B2B

Required technologies:

  • React

  • Redux

  • Node.js

  • Electron

  • Material UI

  • Tor

  • Blockchain (Zcash)

Nice to have:

  • Go

  • Rust

  • Libp2p

Important traits:

  • Passion about Tor, cryptography and decentralization

  • Enthusiastic approach to work with bleeding edge technologies

  • Critical thinking and problem solving

  • Communication skills

  • Proactivity

  • English

Our methodology:

  • Integration and units tests

  • Agile management (Scrum, Agile)

  • Code reviews (GitHub)

  • Pair programming

  • Build server (GitLab/GitHub)

  • We work on Linux

Here’s What We’ll Bring to the Table:

  • Awesome projects to work on

  • Supportive people ready to share their knowledge

  • Non-Corporate culture

  • Elastic working hours

  • Paid holidays

  • Training budget

  • In-house courses and in-house hackathons / hack-nights

  • Private healthcare

  • Multisport Plus

  • Coffee / fruits / snacks

  • Lovely office in the heart of Cracow

Join us and have just fun while building the future