Moonsong Labs is hiring a
Web3 Principal Blockchain Engineer -

Compensation: $11k - $63k *

Location: Madrid

Principal Blockchain Engineer -

Protocol Engineering Team /
/ Remote

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About Moonsong Labs
Moonsong Labs, a web3 protocol engineering services company is looking for a Technical Lead to join the Protocol Engineering Services Team.  Moonsong Labs specializes in blockchain development for web3 infrastructure protocols such as smart contract platforms, interoperability protocols, layer 2 infrastructure, etc.

Examples of our work include primary contributions to Moonbeam (, which is a layer 1 substrate based blockchain focused on interoperability use cases, and that offers an EVM-compatible environment for developing cross-chain scenarios and tanssi ( which will be the focus of this role.

About Tanssi
Tanssi is an appchain infrastructure protocol, that is currently under construction to simplify and enhance appchain deployment like never before.

About the role
The Principal Engineer is responsible for scoping, designing, and implementing features for the tanssi protocol.
They will work with the Moondance Labs team, gathering requirements and presenting solutions in an easy to understand way. They will be responsible for driving technical designs, managing a small engineering team, participating in implementation, deployment, etc.

The ideal candidate has at least 5 years experience in a hands-on software engineering lead role. Web3 experience including expert level knowledge of Blockchain Protocol Development is essential. Experience with systems programming, complex systems implementation, and Rust are also highly desirable. Experience leading web3 infrastructure protocol teams or engineering services teams will make for a great fit.

We expect you to bring your ideas, experience, and knowledge to develop the protocol for tanssi.  Reach out to us if you are interested in helping to drive a multichain future, where users have scalable blockchain agnostic experiences without sacrificing decentralization.


    • Work with the Moondance Labs team to scope, understand, and document technical requirements.
    • Drive protocol technical architecture and designs that meet requirements.
    • Define and execute protocol implementation strategy, work closely with other team leads and stakeholders to implement and execute strategies.
    • Manage and organize a technical team to deliver the protocol.
    • Ensure code quality and software reliability through automated test implementations and processes.
    • Implement and manage automated deployment and operations of protocol.
    • Create high quality software documentation and other written assets to document and explain the system design and how the system functions.
    • Learn and stay current with all necessary technologies.  Research different ecosystems and technology stacks as needed.
    • Communicate regularly and clearly, verbally and in written form, with other team members and also with other partners, vendors, and community members.


    • 5+ years experience in a hands-on backend software engineering role.
    • 2+ years blockchain protocol implementation experience using C++, Rust, or Golang.
    • Experience leading small teams of engineers, directing both the design and managing the team's day to day activities.
    • Strong automated testing and security experience, including working with third party audit firms.
    • Experience working on developer tools and infrastructure protocols is highly desirable.
    • Knowledge of L2s and Substrate is highly desirable.
    • Experience implementing L1 and L2 blockchains is a plus.
    • Good writing skills with an ability to explain complex concepts in a clear and accessible way.
    • Attention to detail while working well under pressure.

Perks and Benefits:

    • 100% Remote
    • Competitive salary
    • Flexible vacation policy
    • Health and Dental plans
    • Direct line of access to Managing Partners and senior leadership;
    • A flat organizational structure and the camaraderie of working alongside committed professionals focused on providing dedicated mentorship, respectful feedback, and career advancement
    • Continuous learning & development
Ready to Shape the Future? Join Us Today!
Equal Opportunity is the law, and at Moonsong Labs, we are ardently committed to equal employment opportunity regardless of race, color, ancestry, religion, sex, national origin, sexual orientation, age, citizenship, marital status, disability, gender identity, or Veteran status. If you have a specific need that requires accommodation, please let us know.
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Compensation: $11k - $63k *

Location: Madrid

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