Protocol engineering
Web3 engineering consultancy for protocol, L1, and L2 teams
BitFashioned is a boutique Web3 engineering consultancy for teams that need protocol engineering, cryptographic R&D, or technical due diligence. We are not a marketing-led agency or a staff-augmentation shop. We design and build what has to work on mainnet: smart contracts, L1/L2 integrations, and the research behind them.
Who this is for
- Protocol teams and foundations shipping core infrastructure, not a landing-page MVP
- Investors and operators who need technical due diligence on a whitepaper, architecture, or token design
- Companies that want CTO-level blockchain leadership without hiring a full-time crypto team, including Cayman Islands setup when that is the constraint
Who this is not for
- Token launches that only need a template contract and a splash page
- Teams looking for the cheapest offshore development shop
- Audit-only engagements with no engineering ownership. We will point you to audit specialists when that is the real need.
What we actually do
Blockchain and protocol engineering
Smart contracts, protocol integrations, dApp architecture, and custom L1/L2 work in Solidity, Rust, and Go.
Technical due diligence
Protocol and whitepaper feasibility, architecture review, and tokenomics assessment, written so an investor or foundation can act on it.
Cryptographic R&D
Zero-knowledge systems, novel protocol design, and research we publish (wallet fallback constructions, consensus experiments) instead of burying in decks.
CTO as a service
Tech strategy, team leadership, and engineering support when you need senior ownership before building the whole organization.
Proof
Public, verifiable work. Follow the links.
- Critical vulnerability in the Avalanche protocol, responsibly disclosed through the HackenProof bug bounty program
- Incorrect ordering of fees and tips in Substrate's transaction payment module on Polkadot mainnet, disclosed via xx labs foundation
- qVault: open-source quantum-secure vault for EVM wallets (Solidity)
- W-OTS(+) up my Sleeve! Secure Fallback for Wallets (IACR ePrint 2021/872)
- Tweakable Sleeve: A Novel Sleeve Construction (IACR ePrint 2022/888)
- Phoenixx: Linear Consensus with Random Sampling (IACR ePrint 2023/1262)
Networks, institutions, and companies we have worked alongside include the Ethereum Foundation, Polkadot, Avalanche, xx network, BIS, the Inter-American Development Bank, the State of Wyoming, Cayman Enterprise City, Lamina1, Parfin, and ai.moda. Names refer to collaboration, research, or engineering relationships, not endorsement.
How we work
Analyze, design, build, validate, scale. Security, scalability, and correctness come before speed. We understand the problem before proposing a stack.
How we compare
- OpenZeppelin
- Strongest for standards, libraries, and audit and operations tooling. Choose them for battle-tested building blocks.
- Consensys Diligence
- Strongest for deep Ethereum security review and formal methods on large programs.
- Protofire
- A larger team for L1/L2 chains, DeFi protocols, and institutions going on-chain that want consulting and delivery at scale.
- BitFashioned
- Strongest when you need a small, engineering-led team to design and ship custom protocol work, research, or due diligence, and stay accountable through production. A senior team starts in weeks, without the months of hiring that building the same team in-house would add to your roadmap.
Start here
Bring the protocol, the constraint, and the deadline. We will tell you quickly if we are the wrong fit.