Web3 Labs Jobs

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Web3j Developer

Web3 Labs
$35k - $55k

This job is closed

Are you looking for a career in a leading blockchain technology company?

Web3 Labs are the creators of the popular Open-Source Web3j library, downloaded over 1 million times, and used by Java and Android developers for connecting to the Ethereum blockchain. We work with both small and large companies, helping them to succeed with their blockchain deployments.

The companies we’ve worked with have been able to simplify their business processes by harnessing the new trust and transparency models that blockchain technology provides. Our clients include Microsoft, J.P. Morgan, Vodafone, ConsenSys and R3.

Web3 Labs are recognised for the first class services we provide and we were proud to be a runner up in Microsoft’s Partner of the Year Awards, 2020.

Do you thrive in a fast-paced environment? Do you want to be part of an exceptional entrepreneurial team with innovative, motivated and extremely driven people? If this sounds like you, get in touch as we expand for an exciting new project!

You should be a good team player, have great communication skills and be up for solving new problems. Our innovative culture will help you to learn, grow and advance. Our team thrives on shared success and diverse ways of thinking.

If you’re looking for a challenging career working in a supportive, friendly team, this could be the role for you. As part of our team, you'll be working with cutting-edge technologies and will have the opportunity to develop a wide range of new skills on the job.

About the Role

We’re looking for a strong core Java/Kotlin developer interested in bringing best practices to further the development of our Web3j library and tools. You’ll get an opportunity to not just work on highly popular Open-Source software, but also help build cutting edge development tooling. We don’t expect you to have blockchain or Ethereum experience, but a proven interest is a must. This is also a fantastic opportunity to be part of a fast growing company.

As a developer on the Web3 Labs Engineering team, you will be responsible for all things needed to help progress the Web3j library, related tools and documentation. It’s a hands-on role looking for developers who take pride in their work. You will work collaboratively with the rest of the team and community.

This is a remote position - We’re happy to work with people based anywhere in a timezone that overlaps significantly with the UK (Europe, Africa).


  • Java or Kotlin, and other related languages - 3+ years
  • Experience with Git (Github, Bitbucket, or similar) - 3+ years
  • Experience with Gradle, Maven, Intellij and other related technologies - 2+ years
  • Proven interest in blockchain technology
  • Proven interest with using or working on Web3 libraries (ethers.js, truffle, web3js, web3j, ..)
  • Ability to work with an agile and remote team

Make yourself stand out!

  • Hands-on experience with peer-to-peer and distributed systems
  • Hands-on experience with Solidity
  • Hands-on experience with Geth, Besu or equivalent
  • Knowledge of inner working of EVM or other blockchains

Life at Web3 Labs

At Web3 Labs, we pride ourselves on having an awesome culture. Don’t just take our word for it, here’s what our staff say:

“We have exposure to books and conferences. It's a cherished culture because blockchain is an area that continues to develop and so we need to keep up with all current developments.”

“It’s an easy going environment - easy to explore solutions independently and easy to speak out and share views. I have autonomy and receive constructive feedback in a positive atmosphere.”

“My job is extremely interesting. I’m surrounded by talented developers who focus on developing clean code and providing good solutions - it’s a true professional culture.”

We want to provide the optimal environment for our staff to work at their very best and understand that we also need to support their own personal needs. That’s why we provide flexibility on working days or hours to fit in with family commitments. We know that life has been pretty challenging for everyone lately and now our company works completely remotely. When life returns ‘normal’ we will meet up in person from time to time and continue to have our amazing team events when possible.
We want our staff to grow their own profile through the company too. We are supportive of OSS work and love it when our staff present at conferences and meetups like Devcon and ConsenSys’ Quorum Webinars. Of course, we sponsor our staff to attend and share their expertise at these events.

As we said above, since COVID-19 we've become a fully remote team. We’re happy to work with people based anywhere in a timezone that overlaps significantly with the UK (Europe, Africa).
Learn more about us!