Zendarox is a DeFi engineering studio founded in San Francisco, April 2021. We build production-grade protocols for clients — and we're developing Zendarox Vault in parallel. Smart contracts, audits, and launch ops scoped to real requirements.
From architecture and audits to production deployment — client builds and our own DeFi protocol in parallel.
4 protocol builds delivered or in-flight since 2021
01 — 06
DeFi Protocol Studio
Production lending markets, AMMs, and yield vaults built to client specifications — architecture, Solidity, audit coordination, deployment planning, and monitoring. We ship what your requirements doc asks for, not a template fork.
Manual audit, fuzzing, and invariant testing for protocols heading to production. Clear severity ratings, remediation support, and re-review — focused on lending, vaults, and governance systems.
2 cross-chain modules delivered to client testnets
03 — 06
Cross-Chain & Messaging
Production cross-chain modules for clients who need omnichain asset flows — messaging design, rate limits, pause mechanisms, and relayer monitoring built to spec.
Emission schedules, ve-token mechanics, and DAO tooling designed against client constraints — modeled for mercenary capital and governance capture before you commit to token design.
Technical due diligence and architecture reviews for founders and investors. Honest scoping of what's buildable in your runway — tied to real customer or product requirements.
Fourteen paid client engagements — audits, production builds, tokenomics, and institutional design — delivered in parallel with Zendarox Vault.
Active development
Lending · YieldEthereum, Arbitrum
Zendarox Vault — Flagship Protocol
Client: Internal product
Our flagship lending product — isolated markets with a yield router. Architecture locked Q1 2026; contract v0.4 in internal QA; August audit sprint booked ahead of Q4 mainnet target.
Own protocolStatus
Feb 2026 – ongoingTimeline
Isolated-market ADR published May 2026
Economic simulation v2 complete
Public launch planned Q4 2026
In development
Vault · Client buildArbitrum
Arc Yield — ERC-4626 Vault Build
Client: Pre-seed yield team
Strategy router and ERC-4626 vault built to client spec — emergency pause, allocator caps, and Foundry invariant suite above 90% branch coverage.
Build in progressStatus
Jan – Sep 2026Timeline
Architecture signed off in three weeks
Production contracts in internal QA
Client launch window Q4 2026
Delivered
Lending · AuditBase
Northline Lending — Security Audit
Client: Seed-stage lending protocol
Manual audit of isolated lending markets on Base — liquidation math, oracle staleness, and permissioned pause paths. Client remediated all high findings before fundraise close.
Audit completeStatus
Jan – Mar 2026Timeline
Report delivered in 21 business days
Two high-severity issues fixed and re-verified
Client cleared for testnet deployment
Delivered
Treasury · IntegrationBase
Frame Treasury — Stablecoin Ops Module
Client: Series A fintech (NDA)
On-chain USDC routing module with reconciliation hooks and admin API spec — built for a fintech treasury team piloting on-chain settlement alongside existing banking rails.
Remote worldwide — HQ in San Francisco. Small team, production contracts, August audit on the calendar.
EngineeringFull-time
Senior Protocol Engineer
Zendarox Vault · Remote · Worldwide
Own core lending and router contracts through audit and launch. You will extend IsolatedMarket, YieldRouter, and vault accounting — with Foundry coverage as the definition of done.
5+ years software engineering, 3+ years production Solidity
Shipped at least one DeFi protocol to mainnet or audited testnet
Split time between client audits and vault hardening ahead of August. Manual review, fuzz harness design, and remediation re-review — not checkbox scanning.
3+ years smart contract security or equivalent audit track record
Foundry, Slither, and invariant design in daily workflow
Clear written findings with severity and exploit path
