Available to hire
I’m a Senior Solidity/Blockchain developer with 5+ years of hands-on experience building secure, gas-optimized smart contracts for DeFi protocols. I focus on upgradeable patterns, proxy and facet architectures, in-line assembly, and protocol integrations across major venues and systems—while keeping security and audit readiness at the center of my workflow.
I’ve worked across the full development lifecycle: architecture design, local testing and fork/hard-hat style workflows, deployment scripting, and on-chain analytics for operational insight. I enjoy contributing to open-source DeFi tooling, reviewing code and security reports, and partnering with teams to ship robust contracts that stand up to competitive audits and real network conditions.
Skills
Language
Russian
Fluent
English
Advanced
Work Experience
Senior Solidity Engineer
November 1, 2025 - PresentConducted smart contract code reviews and security consultations for DeFi projects; contributed open-source work to DeFi tooling and protocol development. Identified multiple high/medium-severity issues in competitive security audits (CodeHawks) including Arkis (DeFi Prime Broker).
Freelance (Self-employed), Senior Solidity Developer
November 1, 2025 - PresentConducted smart contract code reviews and security consulting for DeFi projects. Contributed to open-source DeFi tooling and protocol development. Identified high/medium severity vulnerabilities in competitive security audits. Helped validate and harden contract designs through structured audit findings, recommended fixes, and secure implementation guidance.
Solidity Developer and Security Researcher at Freelance | Self-Employed
November 1, 2025 - PresentFollowing my tenure at Arkis, I transitioned to independent work combining DeFi development with smart contract security research. I am actively participating in competitive audit contests on CodeHawks (FirstFlight program), sharpening protocol-level security skills and developing a more adversarial perspective on smart contract design. Available for freelance engagements and open to full-time Senior Solidity roles in DeFi.
Senior Solidity Developer at Ark
June 1, 2023 - October 1, 2025Architected and built a smart contract framework for an under-collateralized leverage protocol (peak TVL $64.5M) on the upgradeable Diamond pattern (ERC-2535) with ERC-165 runtime interface validation in constructor dependency checks (fail-fast). Delivered E2E and extensive unit testing using Hardhat/Forg e Anvil workflow and zero-to-upgrade deployment scripts via Hardhat Deploy with Tenderly-based simulation and GitHub Actions pipeline integration. Authored and maintained NatSpec across contract interfaces, and built DefiLlama adapters, protocol analytics dashboards, and adapters for protocol metrics tracking.
Senior Solidity Developer at Ark is (DeFi Prime Broker)
June 1, 2023 - October 1, 2025Architected and developed a smart contract framework for an under-collateralized leverage protocol with peak TVL of ~$64.5M on the upgradeable Diamond pattern (ERC-2535) and ERC-165 runtime interface validation in constructors to ensure fail-fast dependency checks. Delivered 60+ verified proxy implementations plus Diamond facets, validators, and evaluators deployed on Ethereum mainnet. Built and maintained E2E and unit test coverage (Hardhat + Foundry), including migrating E2E tests via Hardhat Anvil fork. Implemented zero-to-upgrade deployment scripts using Hardhat Deploy with Tendermly for network simulations and GitHub Actions pipelines. Authored comprehensive NatSpec documentation across contract interfaces and built DefiLlama adapters and protocol dashboards for margin accounts, agreements, and vaults.
Senior Solidity Developer at Coinchange
June 1, 2023 - June 1, 2023At Coinchange I designed and built a cross-chain atomic execution framework that enabled complex multi-protocol DeFi operations to be composed and executed within a single transaction. The system leveraged EIP-1167 minimal proxy clones with CREATE2, using the user's own address as salt to deploy deterministic gas-efficient personal accounts. Custom ABI encoding was used throughout for deep gas optimization.
A key component was a custom Create3Factory that allowed deploying contracts at deterministic vanity addresses regardless of deployer nonce or contract bytecode - enabling consistent cross-chain deployments. I also led the full project migration from Truffle to Hardhat, covering deployment scripts, tests, and configuration, and mentored 3 Solidity developers on best practices around testing, security, and gas efficiency.
Senior Solidity Developer at Arkis
June 1, 2023 - November 20, 2025As a core contributor at Arkis - a DeFi Prime Broker, I led development of the smart contract framework powering under-collateralized leverage trading. The system integrated with major DeFi protocols including Uniswap, Aave, Morpho, ConvexFi, CurveFi, 1inch, and Pendle, built on the upgradeable Diamond pattern (ERC-2535) for efficient modularity and upgradeability.
I owned the full technical lifecycle: architecture and implementation in Solidity, E2E testing with Hardhat and Forge on Anvil forks, unit testing with Foundry, and zero-to-upgrade deployment scripts via Hardhat Deploy and Tenderly. I also authored comprehensive NatSpec documentation across all contract interfaces, with HTML docs auto-deployed via GitHub Actions, and built DefiLlama adapters for protocol discoverability alongside Dune dashboards covering margin accounts, agreements, and vaults.
The protocol underwent multiple independent security reviews: Quantstamp (2023), Trail of Bits (December 2024), Cantina (May 2025), and Spearbit (July & September 2025).
Solidity Engineer at Coinchange/related projects (On-chain work)
December 1, 2021 - January 1, 2023Built an atomic execution framework enabling multi-DeFi operations in a single transaction with custom ABI encoding (~20% calldata reduction). Designed and implemented a user-account deployment mechanism leveraging EIP-1167 minimal proxies with CREATE2 and salt for deterministic deployment of gas-efficient personal accounts. Developed a Create3 factory for contract deployment at vanity addresses, migrated deployments from Truffle to Hardhat, and supported deployments, tests, and configuration.
Senior Solidity Developer at Arkis XYZ/coin change (Audits context suggests auditing/open contribution)
December 1, 2021 - PresentWorked on on-chain components and deployments including protocol integrations around audits and production readiness. Contributed to contract framework improvements, deployment scripting, test pipelines, and integration logic to support DeFi primitive functionality.
Senior Solidity Developer at Merehead
December 1, 2021 - December 1, 2021At Merehead I led smart contract development for two projects while simultaneously onboarding developers from non-blockchain backgrounds. For the BigFan platform I built NFT collectible and marketplace contracts (ERC-721 / ERC-1155). For the reBaked ecosystem I developed the core smart contracts and auxiliary libraries. Both projects were built with full OpenSea marketplace compatibility - including proxy account whitelisting for gas-free listings, contractURI for collection metadata, and structured metadata JSON schema for traits and attributes.
A notable contribution was a pair of Solidity and JavaScript libraries for IPFS CID v1 / uint256 conversion, enabling on-chain IPFS metadata URI generation for token contracts - a non-trivial problem at the intersection of smart contract design and decentralized storage.
Senior Solidity Developer (Web3/DeFi development)
June 1, 2021 - December 1, 2021Built an atomic execution framework enabling multi-DeFi operations in a single transaction with custom ABI encoding to reduce calldata by ~20%. Designed and implemented a user account deployment mechanism leveraging EIP-1167 minimal proxies with CREATE2 and salt to enable deterministic, gas-efficient self-deployment of personal accounts. Developed a Create3 factory for deploying contracts at vanity addresses independently of deployer nonce and by bytecode. Led a full project migration from Truffle to Hardhat, including deployments, tests, and configuration; mentored Solidity developers on testing, security, and gas efficiency.
Senior Solidity Developer at HodlTree
May 1, 2021 - May 1, 2021At HodlTree I designed, tested, and deployed a full suite of DeFi primitives from scratch: a Lend & Borrow protocol, Flash Loans 2.0, Stable Swaps built on top of Flash Loans, Elastic Hedge Modules, a multi-protocol Arbitrage Kit capable of composing multiple operations in a single transaction, and HodlSwap — a Uniswap v2 fork with significant gas optimizations.
I also developed Create3Factory with EIP-3171 emulation for vanity address deployments, and built a vanity address generator in both C++/OpenCL (GPU-accelerated) and multithreaded Node.js. I installed and maintained a full Ethereum node (Geth) and successfully guided the Flash Loans 2.0 contracts through a Certik security audit.
This role deepened my expertise in inline assembly, delegatecall patterns, upgradeable proxies, and oracle integrations across protocols like Aave, Balancer, Curve, Uniswap v3, and Chainlink.
Senior Solidity Developer at BigFan NFT collectibles platform
September 1, 2020 - December 1, 2021Built smart contracts for an NFT collectible platform and marketplace using ERC-721/ ERC-1155 patterns. Developed core and auxiliary contracts for the reBaked ecosystem (ERC-20), implemented OpenSea marketplace compatibility including proxy account whitelisting for gas-free listings, URIs/metadata handling, and standardized metadata JSON schemas. Built Solidity/JavaScript libraries to convert IPFS CID v0 to uint256 token IDs to enable content-addressed token ID minting and direct resolution of token metadata; mentored multiple Solidity developers across testing, security, and gas efficiency.
Senior Solidity Developer at BigFan NFT collectibles platform & marketplace
September 1, 2020 - May 1, 2021Built smart contracts for an NFT collectible platform and marketplace (ERC-721/ERC-1155). Developed core smart contracts and auxiliary libraries for a reBaked ecosystem (ERC-20). Implemented OpenSea marketplace compatibility for both projects, including proxy account whitelisting for gas-free listings, contractURI support for collection metadata, and structured metadata JSON schemas for traits/attributes. Built Solidity and JavaScript libraries to convert IPFS CID v0 to uint256 token IDs, enabling NFTs with content-addressed token IDs and supporting tokenURI resolution directly to IPFS metadata.
Solidity Developer at DefiStarter
September 1, 2020 - September 1, 2020My entry point into professional smart contract development. I built and tested the full smart contract suite for the DefiStarter platform: DFS ERC-20 token, token presale contract, and the SPO (Safe Pool Offering) mechanism. Deployed all contracts to Ethereum mainnet and successfully completed a security audit with MixBytes.
Solidity Developer at DeFiStarter / related projects
June 1, 2020 - September 1, 2020Built and tested a full smart contract suite including DFS ERC-20 token, token presale contract, and SPO (Safe Pool Offering) on top of Balancer pools enabling liquidity providers to be rewarded with project tokens. Implemented staking/BPT token staking with configurable hold periods, grace periods, and proportional daily reward distribution across active stakers. Deployed contracts to Ethereum mainnet and prepared SPO contracts for MixBytes security audit remediation and successful audit pass.
Smart Contract/DeFi Developer at DeFi primitives and infrastructure (various)
June 1, 2020 - September 1, 2020Designed, tested, and deployed core DeFi primitives including Lending & Borrow protocol, Flash Loans 2.0, Stable Swaps on top of Flash Loans 2.0, and Elastic Hedge Modules. Built Elastic Hedge Modules 2.0 for multi-component hedging systems (Elastic Pool, Volatile Pool, Reserve Pool, VPStorage) supporting multiple asset-pair strategies. Contributed to a trading/arb infrastructure including a single-transaction multi-operation composition setup, and implemented gas-optimized Uniswap v2 fork tooling; maintained an Ethereum node (geth) for low-latency RPC access for arbitrage operations. Implemented EIP-3171 emulation for deterministic vanity CREATE deployments and built a GPU-accelerated companion vanity address generator; prepared and supported C elti k security audit remediation and passed audits (as described).
Solidity Developer (DeFi primitives)
June 1, 2020 - September 1, 2020Designed, tested, and deployed DeFi primitives including Lending & Borrow protocols, Flash Loans 2.0, Stable Swaps on top of Flash Loans 2.0, and Elastic Hedge Modules. Developed Elastic Hedge Modules 2.0 with a multi-component hedging system (Elastic Pool, Volatile Pool, Reserve Pool, VPStorage) supporting multiple asset-pair strategies. Contributed to trading infrastructure including multi-protocol arbitrage kits (single-transaction multi-operation composition) and a gas-optimized Uniswap v2 fork (installed and maintained a geth node for low-latency RPC access). Implemented Create3 with EIP-3171 emulation for deterministic vanity deployments and created a C++/OpenCL GPU-accelerated vanity address generator plus multithreaded Node.js companion generator. Prepared Flash Loans 2.0 contracts for CertiK audit, addressed all findings, recommended fixes, and passed the audit.
Senior Solidity Developer at Coinchange / Audit role (e.g., Audits: MixBytes, Certik-sky/ HodlTree)
June 1, 2020 - September 1, 2020Authored and maintained smart contract suites including DF SERC-20 tokens, token presale contracts, and an SPO (Safe Pool Offering) mechanism enabling liquidity-provider rewarded fundraising on top of Balancer pools. Implemented staking token tracking contracts with configurable hold periods and grace periods, plus proportional daily reward distribution across active stakers. Deployed all contracts to Ethereum mainnet and prepared SPO contracts for MixBytes security audit, addressing all findings and passing the audit.
Network Planning Engineer at OJS C Kyrgyztelecom (as described)
November 1, 2008 - November 1, 2010Led CDMA network planning, RF planning, and optimization for the national telecom infrastructure of Kyrgyzstan’s state-owned operator. Managed and mentored a team of three engineers; reviewed and approved site reports across the network for Kyrgyzstan/SkyMobile LTD and supported planning and quality assurance workflows.
Network Planning Engineer at Telecom infrastructure (CDMA/RF planning)
November 1, 2008 - November 1, 2010Led CDMA network planning, RF planning, and optimization for the national telecom infrastructure of Kyrgyzstan’s state-owned operator. Managed and mentored a team of three engineers, reviewed and approved site reports across the network, and supported planning validation with operator stakeholders.
Head of Quality Assurance (QA) / Network Planning (as described) at Kyrgyztelecom (as described)
April 1, 2007 - November 1, 2008Led the department transition from manual Excel-based planning to computer-aided radio network planning using Aircom Enterprise, migrating 340 BTS records into structured planning data. Created the first detailed digital map of Kyrgyzstan from high-resolution satellite imagery with geodata foundations for planning workflows; established continuous network optimization automation including road test data acquisition and analysis, integrated core network monitoring logs, and regular regeneration of interference frequency plans based on collected data.
Head of Quality Assurance (Department Head)
April 1, 2007 - November 1, 2008Directed the department’s transition from manual Excel-based planning to computer-aided radio network planning using Aircom Enterprise, including migration of records into a structured planning database and establishment of improved planning and optimization workflows.
Network Planning Engineer at Telecom planning team (as described)
September 1, 2006 - April 1, 2007Performed GSM RF planning and network optimization including drive tests and analysis of radio-frequency performance data; contributed to site planning across the national network.
Head of Quality Assurance, Network Planning Engineer, RF/Radio Planning Engineer (telecom/IT)
April 1, 2006 - November 1, 2008Led QA transition and digitized radio network planning using Aircom Enterprise; migrated 340 BTS records from Excel/MapInfo into structured planning databases. Created detailed digital maps of Kyrgyzstan using satellite imagery and proprietary elevation models. Established continuous network optimization workflows with automated road testing data acquisition/analysis, integrated core network monitoring logs, and periodic interference frequency plan regeneration based on collected data. Supervised a team of engineers performing GSM RF planning and network optimization, including drive tests and RF performance analysis, contributing to site planning across a national operator network.
IT Systems/Infrastructure Administrator at Counterpart International / ITS systems manager (as described)
May 19, 1998 - September 1, 2006Administered full IT infrastructure for 100+ users across Central Asia offices including mail servers (POP/SMTP/UUC P), firewall, proxy, web, file/print servers, Cisco routers, MSSQL server, Red Hat Linux servers, and PBX systems. Designed and deployed LANs in two country offices (30 nodes) and developed/maintained a distributed database for Central Asia NGOs across multiple offices. Provided technical training to staff for hardware and software usage.
Radio Engineer / Electronic Devices Design (Education-related title context)
May 1, 1998 - September 1, 1998Database Programmer / Developer at Global Software Associates, Inc. (as described)
July 19, 1996 - May 19, 1998Worked on Y2K remediation for banking software written in COBOL, identifying and fixing date-handling issues for compliance. Developed client-server applications in MS Access and Visual Basic and supported local network infrastructure with hardware and technical support.
Database Programmer at Global Software Associates Inc.
July 1, 1996 - May 1, 1998Worked on Y2K remediation for banking software written in COBOL, identifying and fixing date-handling issues to ensure compliance ahead of year 2000. Built client-server applications using Microsoft Access and Visual Basic for company clients, and supported maintenance of local network infrastructure with hardware/technical support.
IT Systems Administrator / IT Infrastructure at Various organizations (Central Asia offices)
July 1, 1996 - May 1, 1998Administered full IT infrastructure for 100+ users across Central Asia offices including mail servers, firewall/proxy, web and file/print servers, Cisco routers, Microsoft SQL Server, Red Hat Linux servers, and PBX systems. Designed and deployed LANs in two country offices (30 nodes total) and developed a distributed database used across multiple NGO offices. Provided technical training to staff on hardware/software usage.
Computer Specialist (Financial Systems Developer) at Isy k-Kul Regional Local Administration (as described)
February 19, 1996 - May 19, 1996Contributed to clearing & depository system for the Kyrgyz Stock Exchange, implementing a client-server platform connecting KSE with brokerage offices to enable direct electronic trading. Worked on departmental budget tracking systems for regional administration; supported financial and administrative software development.
Computer Specialist (Financial Systems / Clearing & Depository support) at Isyk-Kul Regional Local Administration; Kyrgyz Stock Exchange support context
February 1, 1996 - May 1, 1996Contributed to the Clearing & Depository system for the Kyrgyz Stock Exchange, including a client-server platform connecting the exchange with brokerage offices to enable direct electronic trading. Built financial system software for departmental budget tracking from a regional budget context for local administration stakeholders.
Education
Master degree at Kyrgyz Technical University
January 1, 1990 - January 1, 1995Master's degree at Kyrgyz State Technical University
January 1, 1990 - January 1, 1995Qualifications
Audit by Quantstamp
January 1, 2023 - January 1, 2023Audit by Trail of Bits
December 1, 2024 - December 1, 2024Audit by Cantina
May 1, 2025 - May 1, 2025Audit by Spearbit
July 1, 2025 - September 1, 2025Quantstamp audit
January 1, 2023 - April 15, 2026Trail of Bits security audit
December 1, 2024 - April 15, 2026Cantina security audit
May 1, 2025 - April 15, 2026Spearbit security audit
July 1, 2025 - April 15, 2026Open-source contributions / Security audit readiness (as described)
January 11, 2030 - September 16, 2026Industry Experience
Financial Services, Software & Internet, Media & Entertainment, Professional Services, Telecommunications, Government
Skills
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