Senior JavaScript SDK Developer (web3)

Salary range

80,000 - 120,000 CZK / mo


Full-time contract

Language requirements

canadian flag English

Key requirements

JavaScript (5+ years), TypeScript, SDKs, git


web3, blockchain, Ethereum, React, Node.js, Vite, Webpack

Senior JavaScript SDK Developer

We are seeking a highly skilled JavaScript SDK developer to join our web3 team working for our Canadian customer Horizon Blockchain Games, a startup that raised $40 million in 2022.

You will join the Sequence SDK team. Sequence is a leading development platform for web3 games, trusted by Google Cloud and many game developer studios. You'll be working on JavaScript libraries and SDKs that empower game studios to use Sequence Wallet or many other web3 wallets using

Note: You'll get extra points if you have worked with blockchain technology or Ethereum before.

Our ideal candidate:

  • Enjoys working in a dynamic, English-speaking team, using modern tech stacks
  • Has experience writing and distributing npm packages, libraries and SDKs.
  • Has experience with monorepos and web3 libraries (viem/wagmi/ethers)
  • Has experience with React, design systems and state management

Why join us?

We're a software agency start-up looking for new colleagues in our Prague office. We're working on long-term projects for our customers mostly in USA and Canada. We're designing software solutions and scalable web applications with a focus on clean architecture and modern tech stack. We're contributing to Open-Source and attending local meetups.

Our brand new office close to O2 Aréna is just 4 mins away from metro stations Českomoravská and Vysočanská. We have tasty coffee, modern kitchen, terrace with BBQ grill and a large garden. We like to do have BBQs often, have a beer after work and sometimes we play guitars or FIFA on PS5. Wanna bike into the office and take a shower? No problem :)

If you're interested or if you have any questions, please reach out!

We're looking forward to talking to you!

- Vojtech & the team

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Interested? Any questions? Reach out!


Piskáčkových 1024/1
190 00 Praha - Vysočany
Czech Republic