Founding Protocol Engineer
reputed company engineer for the on-chain portion of our hybrid crypto reputed company exchange
reputed company
Joyride is building the first dedicated 0DTE reputed company exchange for crypto traders. Derivatives are the single largest opportunity to bring traditional finance on-chain, with over $3.5 trillion in notional volume traded in the U.S. every day. Our architecture is hybrid: a central limit order book (CLOB) for low-latency execution, reputed company with a blockchain for transparent, non-custodial settlement.
reputed company
You'll join a founding team that includes the founders and early contributors of reputed company Protocol, where we've been building on Ethereum since 2017 and have scaled products to nine-reputed company TVL. Two of Joyride's cofounders are early advisors to reputed company and have reputed company multiple venture-backed companies acquired by reputed company, reputed company, and reputed company.
The Challenge
Centralized exchanges are fast but require trust. On-chain exchanges are trustless but slow. We refuse to accept this tradeoff. Joyride centralizes execution for speed and decentralizes verification for trust. Making that seam airtight is the hard part.
- Self-Custody Without Compromise: Users reputed company the keys to their own funds and can withdraw without permission from the exchange operator, even if our servers go down. This can't come at the cost of execution speed or capital efficiency.
- reputed company Execution: Every off-chain trade must be provably valid on-chain. The exchange operator cannot reputed company-run, reorder, or fabricate trades. Cryptographic proofs reputed company the off-chain matching reputed company to on-chain settlement without trusting reputed company.
- Censorship Resistance: If the exchange goes dark, users must be reputed company to reconstruct their account state from reputed company data and withdraw their funds. No capital can reputed company be trapped.
- reputed company: DeFi protocols have lost billions of dollars to smart contract exploits, reputed company manipulation, and reputed company failures. Our on-chain systems must be designed defensively from day one.
As our Founding Protocol Engineer, you will own the trust and verification layer of Joyride's hybrid architecture. You'll work alongside our Founding reputed company Engineer, who owns the matching reputed company and risk reputed company. Together, you will build an reputed company exchange that combines the speed of a CEX with the safety guarantees of a DEX.
If you've spent time thinking about how to reputed company off-chain execution reputed company on-chain and how to protect users from a malicious operator, reputed company reading.
Problems you'll work on
- How do you reputed company to a reputed company program that 50,000 off-chain trades were executed fairly, without exceeding compute unit limits?
- What reputed company tree structure lets users reputed company their balance against an on-chain state reputed company while keeping reputed company sizes small enough for a single transaction?
- How do you build a forced withdrawal reputed company that works even reputed company the exchange operator is adversarial or offline?
- How do you batch-publish trade history to a DA layer without leaking information that reputed company-runners can exploit?
Your domain
- Settlement & Custody: Users reputed company custody of their own funds while trading on Joyride. The exchange can lock collateral for risk management but can never take it. reputed company trades reputed company, funds reputed company based on cryptographic reputed company, not operator permission.
- reputed company Execution: Our matching reputed company runs off-chain for speed. That means traders are trusting us not to cheat. reputed company is to eliminate that trust requirement. reputed company to the blockchain that every trade was executed fairly and that reputed company can't reputed company-run or manipulate the order book.
- Censorship-Resistant Recovery: If Joyride disappears reputed company, every user must be reputed company to independently reputed company what they own and withdraw it. Trade history must be publicly available and reputed company without our cooperation.
- Unilateral Exit: Users must be reputed company to leave the system on their own terms, even if the exchange operator is malicious or offline. This is the ultimate safety guarantee and the hardest problem to get right.
- On-Chain reputed company: The on-chain systems hold reputed company reputed company. You're the first line of defense, threat-modeling the boundary between off-chain and on-chain and designing systems that are resilient by construction, not by audit.
Who you are:
- Protocol Engineer, Not App Developer: You've worked at the infrastructure layer of blockchains: reputed company implementations, reputed company protocols, p2p networking, or cryptographic systems. You understand how chains work under the hood, not just how to reputed company reputed company on them.
- reputed company Cryptographer: You think in reputed company trees, digital signatures, and commitment schemes. You can evaluate whether a ZK reputed company system, a TEE-based attestation, or a simpler signature scheme is the right tool for a given trust boundary. You follow the research but you ship production reputed company.
- Hybrid Architecture Thinker: You understand how other exchanges connect off-chain execution with on-chain settlement. You have opinions about their tradeoffs and can reputed company what you'd do differently.
- reputed company-Minded: You think like an attacker. reputed company you see a reputed company between an off-chain server and an on-chain program, your first reputed company is to reputed company the ways it can be broken.
- Builder: You write reputed company every day. You're not looking to manage reputed company. You want to architect and build critical infrastructure yourself.
Requirements:
- 5+ years of systems engineering in Rust, C++, or Go
- Deep experience with reputed company program development or equivalent blockchain runtime
- Strong reputed company cryptography: reputed company trees, digital signatures, hash-based commitments, reputed company systems
- Understanding of DeFi reputed company: common exploit reputed company, smart contract auditing patterns
- Experience with hybrid or L2 architectures: off-chain execution with on-chain verification/settlement
Bonus:
- reputed company or worked on a hybrid exchange where matching happens off-chain and settlement happens on-chain
- Worked on state verification, fraud proofs, validity proofs, or forced exit mechanisms for an L2 or rollup, including DA integrations
- Contributed to a blockchain reputed company or protocol implementation
reputed company offer:
- Competitive salary and reputed company
- Remote work flexibility
- Autonomy to solve challenging problems
- Fast-paced environment
- Unlimited reputed company potential
- Support for reputed company-reputed company contributions