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Senior Engineer - ZK Interoperability
Remote
Engineering /
Full Time /
Remote
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About Celestia Labs
Celestia is the modular blockchain powering unstoppable applications. We are pushing new paradigms for enabling a thriving ecosystem of applications which are performant, interoperable, secure and fully customizable.
About the Team
Celestia Labs is remote first and highly distributed, with English as our primary language for communication. We are looking for self-starters that are excited about working in a fast paced startup environment.
We do not require team members to live in specific timezones, but we primarily operate between European and US time zones (CET & ET), and have a preference for Berlin and New York where most of the engineers are located. Team members are expected to be available as needed for team meetings and company events that are scheduled. Generally these are scheduled between 1pm-6pm CET.
About You
You're a seasoned engineer passionate about distributed systems, cryptographic protocols, and interoperability in blockchain networks. You thrive on solving foundational technical problems and understand the balance between shipping and safeguarding critical infrastructure. You bring both Rust and Golang experience and are comfortable navigating different parts of a codebase. Knowledge of ZK systems is highly desirable. You are collaborative, proactive, and able to work independently in a remote-first environment.
Perks
- Flexible and remote work environment with multiple onsites each year
- Competitive salary and meaningful long-term compensation package
- Stipends for home office, coworking space, professional and personal growth
- 4 weeks annual vacation
- Being part of a collaborative, supportive team with opportunities for mentorship and professional growth
- 401k and healthcare coverage for US team members
Responsibilities
- Protocol Engineering: Design and implement secure and efficient bridging protocols based on zero knowledge primitives.
- Architectural Leadership: Drive key architectural decisions, balancing trade-offs in scalability, performance, and security.
- Security-First Design: Proactively identify and mitigate security vulnerabilities in cross-chain interactions.
- Mentorship & Collaboration: Provide technical guidance to junior engineers, and work closely with the broader engineering, research, and product teams.
- Lead by Example: Set high standards for code quality, testing, documentation, and effective communication.
Who You Are
- Experienced Engineer: 5+ years of backend or systems-level programming experience working in both Rust and Golang. Understanding of solidity is a bonus.
- Knowledgeable on Bridging: You’re familiar with current interoperability protocols in web3, specifically Hyperlane and are opinionated about what designs have the best properties for what users want.
- Knowledgeable on Zero Knowledge: Familiarity with designing and hands-on coding experience at implementing circuits, specifically using sp1 and risc0. You should be aware of tradeoffs in performance and efficiency between different designs and algorithms.
- Security-Conscious: Deep understanding of secure systems design, particularly around adversarial environments.
- Self-Directed: You’re highly autonomous and able to identify and own high-impact work.
- Problem-Solver: Skilled at identifying and addressing performance bottlenecks and security gaps with effective solutions.
- Technical Leader: Known for setting technical direction, mentoring team members, and driving projects to success.
While experience in the blockchain space is preferred – having general excitement about web3 and modular blockchain technology is a must!
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What is Zero-knowledge?
Zero-knowledge is a concept in cryptography that allows two parties to exchange information without revealing any additional information beyond what is necessary to prove a particular fact
In other words, zero-knowledge is a way of proving something without actually revealing any details about the proof
Here are some examples of zero-knowledge:
- Password authentication: When you enter your password to log into an online account, the server doesn't actually know your password. Instead, it checks to see if the hash of your password matches the stored hash in its database. This is a form of zero-knowledge because the server doesn't know your actual password, just the hash that proves you know the correct password.
- Sudoku puzzles: Suppose you want to prove to someone that you've solved a particularly difficult Sudoku puzzle. You could do this by providing them with the completed puzzle, but that would reveal how you solved it. Instead, you could use a zero-knowledge proof where you demonstrate that you know the solution without actually revealing the solution itself.
- Bitcoin transactions: In a Bitcoin transaction, you prove that you have ownership of a certain amount of Bitcoin without revealing your private key. This is done using a zero-knowledge proof called a Schnorr signature, which allows you to prove ownership of a specific transaction output without revealing the private key associated with that output.
- Secure messaging: In a secure messaging app, you can prove to your contacts that you have access to a shared secret without revealing the secret itself. This is done using a zero-knowledge proof, which allows you to prove that you have access to the secret without actually revealing what the secret is.