Victoria Kostina
@victoriakostina
I build secure, gas-efficient DeFi smart contracts, liquidation bots, and protocol infrastructure across EVM chains.
PolandWhat I'm looking for
I've built and deployed liquidation and arbitrage bots for Polygon and BNB Smart Chain, using AAVE, Uniswap, and Balancer flash loans in a highly competitive environment.
At Sovryn, I worked with the CTO on SOV token, staking, vesting, governance, liquidity mining, and Perpetual Swaps. I designed a Diamond proxy architecture for complex perpetual-swap logic across 26 logic and function contracts, managed governance proposals, supported multisig transfers, and collaborated with CertiK through audit preparation and fixes.
Previously at Inveniam, I built a tokenization platform from scratch in Solidity and LIGO, deploying contracts to Ethereum Mainnet and Tezos Testnet. I've also contributed to Polymath smart-contract refactoring and Solidity 0.5 migration.
Across 23+ years in IT, including Java development leadership, I bring a practical focus on decentralized systems, security reviews, upgradability, gas optimization, and clean, well-tested code.
Experience
Work history, roles, and key accomplishments
Senior Smart Contract Engineer
Self Employed
Mar 2023 - Present (3 years 5 months)
Designed and deployed smart contracts for liquidation and arbitrage logic using flash loans and various DEXs. Implemented scripts for data reading, monitoring, and transaction creation, and managed blockchain nodes and server infrastructure.
Senior Solidity Developer
Sovryn
Nov 2020 - Feb 2023 (2 years 3 months)
Implemented SOV token, staking, vesting, and governance contracts, and deployed them to Rootstock Mainnet. Designed and implemented a Diamond proxy pattern for Perpetual Swaps, managed governance proposals, and collaborated with auditors.
Senior Blockchain Engineer
Inveniam
Mar 2019 - Oct 2020 (1 year 7 months)
Designed and implemented smart contracts in Solidity and LIGO for a tokenization platform, deploying to Ethereum Mainnet and Tezos Testnet. Developed demo clients and collaborated with auditors.
Solidity Developer
Polymath Network
Oct 2018 - Jan 2019 (3 months)
Refactored smart contracts and migrated to Solidity version 0.5.*. Wrote tests for smart contracts.
Java Team Lead, Software Development Manager
Tideworks
May 2016 - Sep 2018 (2 years 4 months)
Led a team of Java developers and managed software development projects.
Served as a senior Java developer and tech lead, contributing to projects at Ericsson/MetraTec.
Senior Java Developer
Telenor
Sep 2011 - Jan 2015 (3 years 4 months)
Worked as a senior Java developer at Telenor.
Software Developer
Zoral Labs
Mar 2011 - Jul 2011 (4 months)
Developed software solutions at Zoral Labs.
Software Developer
Ukrsibbank
Aug 2008 - Feb 2011 (2 years 6 months)
Developed software solutions at Ukrsibbank.
Software Developer
Lana Pro
Nov 2007 - Jul 2008 (8 months)
Developed software solutions at Lana Pro.
Software Developer
QArea
Apr 2006 - Nov 2007 (1 year 7 months)
Developed software solutions at QArea.
Software Developer
Freelance
Jul 2005 - Mar 2006 (8 months)
Worked as a freelance software developer.
Software Developer
Escape
Mar 2003 - Jul 2005 (2 years 4 months)
Developed software solutions at Escape.
Education
Degrees, certifications, and relevant coursework
Kharkiv National University of Radioelectronics
Master of Science, Information Systems and Technologies
1997 - 2002
Master's degree in Information Systems and Technologies from Kharkiv National University of Radioelectronics.
Availability
Location
PolandAuthorized to work in
Job categories
Skills
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