Alexander
Shchepetov

On-chain Engineer
Remote · GMT+3
M.Sc. Blockchain · MIPT · 2023

I take protocols from idea to production — mechanism design, Solidity, the off-chain systems around them. Sole on-chain engineer at Azuro and Trendle. Built two more DeFi protocols solo: custom on-chain privacy without trusted setup, registry-based lending with intent matching. One reached live users, the other is fully built.

Alexander Shchepetov

Yep — that's me.

$10M Peak TVL
0 Exploits In Prod
10+ Audits Passed
4Y In DeFi

Across Azuro, Trendle, and two more DeFi protocols.

Experience
On-chain Engineer & Protocol Architect Azuro
Feb 2022 – Present ›

On-chain architecture, $AZUR token, 10+ external audits.
$530M+ processed
$10M peak TVL
$4.5M+ revenue
0 prod exploits

Scope — Joined as one of two core engineers in 2022. As the team contracted, became the sole on-chain engineer — all on-chain architecture, mechanism design, security decisions. The scope kept spilling into the off-chain systems too; on-chain problems and engineering problems kept overlapping.

Core protocol — Built most of the core protocol with the other engineer: prediction-market mechanics — odds modeling, bookmaker positioning, settlement. Getting the payout and settlement invariants right is the hard part; the failure mode is silent and expensive.

Token contracts — Built and shipped the $AZUR (ERC-20) token contracts to the team's tokenomics spec: vesting, several staking mechanisms, fee accrual to stakers, long-term holder rewards. Validated each mechanism on historical on-chain data before shipping. Tuned parameters from real protocol metrics after.

Audits — 10+ external audits: Pashov, Hexens, Hacken, Pessimistic. Internal audit before each engagement. Work through findings directly with auditors. Audits are a structured second opinion. You still own the code.

Off-chain — Off-chain alongside the contracts: FastAPI backends, The Graph subgraphs for indexing, Dune dashboards for analytics, risk-monitoring tooling.

— one of two core engineers in 2022, sole engineer as the team contracted

Protocol Architect & Sole On-chain Engineer Trendle
Jun 2025 – Present ›

Sole on-chain engineer — architecture, mechanism design, audits.

Ownership — Sole on-chain engineer. Protocol architecture, mechanism design, Solidity contracts, testing, audit coordination. No other smart-contract engineer on it.

Sole Smart-Contract Engineer & Protocol Designer Stealth DeFi Protocols part-time · NDA
Jan 2026 – Apr 2026 ›

Two DeFi protocols solo — on-chain privacy + fixed-term lending.

Scope — Two protocols, sole engineer on both. Architecture, mechanism design, Solidity, Rust backends. One reached production with live users; the other was fully built but never launched. Code and demos on request.

Privacy market — One is a prediction market with a custom on-chain privacy scheme. The bettor's side never appears on-chain — not in calldata, not in storage, not in events. Built on Pedersen commitments over BN254. No trusted setup, no off-chain proving circuit. Most privacy designs in this space don't avoid both at once.

Lending — The other is a fixed-term lending protocol — fully built, not yet launched. Registry-based architecture over a monolithic core, chosen for upgrade safety. Intent/solver matching for atomic multi-source loan funding, modeled on CoW Swap and 1inch Fusion. Pluggable yield strategies: Aave v3 and Morpho Blue.

— code and demos available on request

earlier

QA Engineer · Intel Corporation (OpenVINO) · Oct 2020 – Oct 2021

Backend Developer · PolitProject · Aug 2019 – Oct 2020

Skills
Protocol Design
DeFi protocols (AMMs · staking · lending · prediction markets)tokenomics & incentive modelingcross-chain architecturestorage layout & gas strategycustom on-chain cryptography
Contracts & Tooling
SolidityYul / inline assemblyEVM internalsFoundryHardhatOpenZeppelinSoladyPRBMathproxy patterns
Standards & Cryptography
EIP-712ERC-1271EIP-1153ERC-4337 (account abstraction)Pedersen commitmentshash-to-curveBN254 pairingszk-SNARKsAave v3Morpho BlueChainlink price feeds
Security & Audit
threat modelingtrust-assumption analysisreentrancy patternsinternal auditfuzz & invariant testing (Echidna, Medusa)property-based testingMEV-aware designgas & storage optimization
Off-chain & Tooling
PythonFastAPITypeScriptethers.jsweb3.pyRustThe GraphDune AnalyticsPostgreSQLAI-assisted development (Claude Code, Codex — test gen, audit prep, scaffolding)
Projects

Prediction-market mechanics

Azuro · production

Problem — A prediction market has to quote odds, hold bookmaker positions, and settle — all while staying solvent across thousands of open bets. Get the payout invariants wrong and the loss is silent.

Built — Built most of the core protocol with the other engineer: odds modeling, bookmaker positioning, settlement. Validated each mechanism on historical on-chain data before shipping, then tuned parameters from live metrics.

Outcome — $10M peak TVL, $4.5M+ revenue. Zero production exploits across 10+ external audits.

On-chain privacy scheme

Stealth prediction market · NDA

Problem — Prediction markets leak the bettor's side: calldata, storage, events. The usual fixes need a trusted setup or an off-chain proving circuit. I wanted neither.

Built — Designed a scheme on Pedersen commitments over BN254. The chosen side never appears on-chain in any form. Resolve invariants make it impossible for the operator to forge payouts.

Outcome — Shipped in a prediction market that reached production. Code and demo on request, under NDA.

Registry-based lending

Stealth · built, not launched · NDA

Problem — A lending protocol that keeps adding markets and yield sources can't sit on a monolithic core. Every upgrade touches live money.

Built — Built a registry-based architecture in the style of Aave v3, chosen over a monolith for upgrade safety. Added intent/solver matching for atomic multi-source funding, in the spirit of CoW Swap and 1inch Fusion. Yield strategies plug in: Aave v3, Morpho Blue.

Outcome — Fully built, not yet launched. Code and demo on request, under NDA.