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Ethereum smart contract architect (10 years) · Built systems securing
$160M+ in value · Experienced with AI-assisted tooling
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Summary
Ethereum smart contract architect and engineer with 10 years in the Ethereum
ecosystem and 12 years of professional software experience overall. I
build production-grade DeFi systems end-to-end: translating product ideas
into smart contract architectures, implementing them safely, and
hardening them through testing and audit response. Experienced in incident
response.
-
Built and maintained production contracts securing
$160M+ in value
-
Strong testing focus:
mainnet-fork testing, invariants, fuzz/property-based testing
-
Experience with ethers.js, Hardhat, Foundry, Tenderly
-
Early adopter of agentic coding tools to accelerate
planning, testing, hardening, and automation
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Computer science and engineering background, strong foundations in
cryptography
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Lifelong learner, Linux/CLI-native, love experimenting and taming
complexity
Interested in: Permissionless systems,
decentralization, privacy and ZK tech, and applications where on-chain
primitives unlock genuinely novel value.
Open to: Senior or lead roles in
Solidity, protocol engineering, or smart contract security
— Copenhagen (hybrid) or remote.
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Experience
NFTfi — Senior Smart Contract Developer
Jul 2021 – Present | Remote
-
Primary architect and builder of a smart contract system for
NFT-backed P2P loans
-
Maintained and upgraded contracts escrowing high-value NFTs, including
RWA assets
-
Designed deployment and migration flows for upgrades while minimizing
UX disruption and approval friction
-
Improved gas efficiency and reduced required user interactions,
including approval-related flows
-
Built hardening workflows:
mainnet-fork tests, invariants, fuzz testing, audit response, and
incident response
-
Collaborated closely with product, frontend, backend, and external
audit teams
-
Shared knowledge internally on Ethereum, Web3 tooling, and cryptography
-
Delivered advanced protocol features:
flashloan-based refinancing, Merkle-tree token
distribution, oracle-enabled features, and
BoringVault-style vault integrations
-
Designed competitive migration mechanisms to attract users from
competitors
Unslashed Finance — Smart Contract
Architect / Developer
May 2020 – Jun 2021 | Remote
- Employee #2 at an early-stage DeFi insurance startup
-
Contributed substantially to the smart contract architecture and
implementation
-
Helped build a production protocol that reached
$160M+ TVL at peak
MakerDAO — Software Developer
Aug 2018 – Dec 2018 | Copenhagen
-
Developed internal tools and created user-facing guides and tutorials
Earlier Experience
Galaxis Network / Solidity Services —
Founder & Smart Contract Architect / Consultant
| Mar 2018 – Dec 2019 | Budapest / Remote
Founded and built a DeFi portfolio management project (Galaxis Network);
in parallel consulted on blockchain projects — designing smart contract
architectures, delivering development work and training (Solidity
Services).
EPAM Systems —
Software Engineer
| May 2016 – Mar 2018 | Budapest
Worked in EPAM's Blockchain Competency Center on research,
proof-of-concepts, and internal training around blockchain technology.
Rubin Informatikai Zrt. —
Junior Software Developer
| Oct 2014 – Apr 2016 | Budapest
Built backend features for a telecommunications service in Java/Spring
with Oracle DB.
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Education
DTU – Technical University of Denmark
Master's programme, Space Engineering and Mathematical Modeling
(unfinished)
| 2020 – 2022
Budapest University of Technology and Economics
BSc, Computer Engineering
| 2011 – 2016
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Skills
Core:
Ethereum · Solidity · Software Architecture · Smart Contract Design ·
Smart Contract Testing · Agentic Engineering · Cryptography
Fundamentals
Tooling:
Hardhat · Foundry · ethers.js · Tenderly · JavaScript · Python · Linux
· Git
Earlier:
Java · C# · C · C++ · SQL · Erlang · Prolog
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Languages
English
— Professional working
Hungarian
— Native / bilingual
Danish
— Intermediate (reading)