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Backend Software Engineer
at Kleros
over 1 year ago | 1133 views | 3 applications

About the company

Kleros is a decentralized arbitration protocol that uses blockchain, game theory and crowdsourcing to solve a wide range of disputes. The Cooperative Kleros, the company that kickstarted the development of the Kleros protocol, is a widely recognized name in the blockchain and legaltech industries with a highly skilled engineering and research teams. As a fast growing company in a highly innovative industry, Kleros has a wide range of open positions in engineering, management and communications positions. To learn more about Kleros, check our website (, read our white paper ( or our book Dispute Revolution (

Job Summary

Are you passionate about decentralization and building the new governance systems that will make the old ones obsolete? If so, read on.

What Will You Do?

You will be part of Kleros’ software development team, working closely with the team on open source code. You will develop software needed for Kleros to run: write code, participate in code reviews, conduct tests and deal with potential bugs and vulnerabilities reported through our bug bounty programs and audits.

You will spend most of your time as the project owner of the server side magic that makes Kleros work.

All of our projects use the blockchain as the source of truth, but there are many backend challenges that are crucial to the Kleros ecosystem. You will take on projects that interact with the blockchain, support the user experience, use decentralized protocols, and handle important off-chain data.

There are also opportunities to get involved with smart contract development and product development.

The Ethereum ecosystem is innovating quickly; so above all, you will be learning new things all the time.

Some of the responsibilities include:

Back-end development using Node, Python, Go or a language of your choice. AWS infrastructure maintenance. Developing software to interact with the Ethereum blockchain. Architect, build and maintain a sustainable backend server infrastructure. Taking responsibility for improving and maintaining existing projects. Interfacing with and supporting our front-ends decentralized applications. A previous blockchain experience is not necessarily required but candidates should be able to demonstrate a blockchain interest (read blog posts / scientific articles, tried dapps on mainnets or testnets).


Most of the compensation (2/3) is labelled in fiat and paid in crypto. The remaining (1/3) is labelled in PNK vested over 3 years with a 1 year cliff ensuring you get a stake in the project. We are a cooperative, so as a worker you own part of the company and get voting rights. Want to Apply?

You can apply on this website with an application note answering the following questions:

  1. Why would you like to work on Kleros?

  2. Why do you think you are a good fit for this role?

  3. What is the address of the KlerosLiquid smart contract on the mainnet that uses and the value of its maxDrawingTime variable? Let’s test your sleuthing skills!

Feel free to include anything else you think is relevant for us to look at.

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