Engineering-led Web3 R&D

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Boutique blockchain consultancy specializing in cryptographic research, protocol engineering, and technical due diligence. We build what actually works.

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Multi-Chain Expertise

Security-First

Rapid Prototyping

~/bitfashioned/Deployment.sol

1pragma solidity ^0.8.24;
2
3error NotYetAudited();
4error StillNotAudited();
5error OkFineShipIt();
6
7contract Deployment {
8    uint8 constant MAX_AUDIT_ROUNDS = 3;
9    uint8 public auditsCompleted;
10
11    modifier checkedTwice() {
12        if (auditsCompleted < MAX_AUDIT_ROUNDS)
13            revert StillNotAudited();
14        _;
15    }
16
17    // "immutable" until the next governance vote
18    address public immutable deployer;
19
20    constructor() {
21        deployer = msg.sender;
22        // TODO: remove before mainnet (added: 2019)
23    }
24}

Collaborators & ecosystems

Alongside serious builders

Research-grade engineering across public networks, protocol communities, and select institutional programs — from vulnerability disclosures and core infra to production systems.

L1s, foundations, and ecosystems where we’ve shipped core infra and published disclosures.

Products

Products tied to outcomes

Alongside protocol and engineering work, we release products with clear economics. Effio helps companies turn hard to track operational upside into savings they can act on.

BitFashioned product

Effio

Effio finds savings hidden in tools, workflows, accounts, and cloud usage. The model is simple: value first, fees from the savings created.

Visit effio.xyz

Where the upside hides: Many savings are real but hard to see. They live across onboarding, documentation, AI routines, new accounts, SaaS seats, cloud usage, old log files, and handoffs between teams.
Why it rarely becomes plan A: Finding this upside takes senior context and checks across finance, IT, security, and operations. That makes it expensive to chase internally, even when the savings are worth it.
What Effio does: Effio maps where work, tools, and spend connect. Then it finds practical changes that reduce cost without adding more management overhead.
Economics and incentives: Effio is paid from savings it helps create. Incentives stay tied to results, not hours spent searching for them.

Services

Engineering Excellence at Every Layer

We bring deep technical expertise to every engagement, from low-level cryptographic research to production-ready system deployment.

Blockchain Development

Smart contracts, protocol integrations, dApp architecture, and custom L1/L2 solutions built with precision.

Smart ContractsdAppsL1/L2 Solutions

Technical Due Diligence

In-depth evaluation of blockchain protocols, whitepaper feasibility, architecture review, and tokenomics assessment.

Protocol AuditsTokenomicsArchitecture Review

Research & Development

Cryptographic research, novel protocol design, experimental systems, and cutting-edge performance studies.

CryptographyZK SystemsNovel Protocols

Product Prototyping

Rapid MVP and PoC development to validate ideas quickly with investor-ready, functional prototypes.

MVPsProof of ConceptRapid Iteration

Software Engineering

Full-stack Web3 systems, backend infrastructure, API design, and production-grade DevOps.

Full-StackAPIs & DevOpsCloud Infrastructure

CTO as a Service

Strategic tech leadership, team management, and engineering support — including full setup for firms establishing in the Cayman Islands.

Tech StrategyTeam LeadershipCayman Islands Setup

Methodology

Engineering Process, Not Just Outputs

Our methodology prioritizes understanding over assumptions, correctness over speed, and long-term viability over quick wins.

Analyze

Deep technical assessment of requirements, constraints, and existing systems. We understand the problem before proposing solutions.

Requirements gathering, feasibility analysis, risk assessment

Design

Architecture blueprints grounded in first principles. Security, scalability, and correctness are non-negotiable foundations.

System architecture, protocol design, security modeling

Build

Implementation with engineering rigor. Clean code, comprehensive testing, and documentation that serves the system lifecycle.

Development, testing, code review, documentation

Validate

Rigorous verification through audits, stress testing, and formal methods where applicable. Trust, but verify.

Security audits, performance testing, formal verification

Scale

Production deployment with monitoring, optimization, and continuous improvement. Systems that grow with your needs.

Deployment, monitoring, optimization, maintenance

Analyze

Deep technical assessment of requirements, constraints, and existing systems. We understand the problem before proposing solutions.

Requirements gathering, feasibility analysis, risk assessment

Design

Architecture blueprints grounded in first principles. Security, scalability, and correctness are non-negotiable foundations.

System architecture, protocol design, security modeling

Build

Implementation with engineering rigor. Clean code, comprehensive testing, and documentation that serves the system lifecycle.

Development, testing, code review, documentation

Validate

Rigorous verification through audits, stress testing, and formal methods where applicable. Trust, but verify.

Security audits, performance testing, formal verification

Scale

Production deployment with monitoring, optimization, and continuous improvement. Systems that grow with your needs.

Deployment, monitoring, optimization, maintenance

Research & Publications

Advancing the State of the Art

Our research spans cryptography, consensus mechanisms, and protocol design. We publish our findings and contribute to the broader Web3 ecosystem.

Zero-Knowledge ProofsConsensus MechanismsCryptographic PrimitivesPrivacy-Preserving SystemsFormal VerificationProtocol Economics

View Full Research Blog

Cryptography

W-OTS(+) up my Sleeve! Secure Fallback for Wallets

Research on quantum-secure backup mechanisms for cryptocurrency wallets using Winternitz One-Time Signatures.

Cryptography

Tweakable Sleeve: A Novel Sleeve Construction

Advanced cryptographic construction for secure key embedding and wallet recovery mechanisms.

Consensus

Phoenixx: Linear Consensus with Random Sampling

Novel consensus mechanism achieving linear complexity through probabilistic sampling approaches.

Open Source

Building in Public

We contribute to the Web3 ecosystem through open source tooling, SDKs, and reference implementations. Code speaks louder than claims.

View GitHub

qVault

Quantum-secure vault solution for Web3 wallets. Plug and play for any EVM compatible network.

Solidity

uniswapv4-challenge-miner

Miner for the Uniswap V4 challenge to prove the feasibility of the challenge.

Rust

xxbft-calcs

Calculations for the xxBFT consensus mechanism - a novel linearly scalable consensus protocol.

Security Disclosures

CriticalAvalanche

Critical Vulnerability in Avalanche Protocol

Discovered and responsibly disclosed a critical vulnerability in the Avalanche protocol through the HackenProof bug bounty program.

HighPolkadot Substrate

Incorrect Ordering of Fees & Tips in Transaction Payment

Identified a bug in Substrate's transaction payment module where fees and tips were swapped, causing incorrect fund distribution between treasury and block producers on Polkadot Mainnet.

via xx labs foundation

Start a Project

Let's Build Something Real

Whether you're launching a new protocol, need technical validation, or require specialized blockchain engineering—reach out directly and we'll take it from there.

Email us

[email protected]

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