During my career, I have successfully completed numerous blockchain projects that have not only improved operational efficiency but also contributed significantly to business growth.
One of the notable projects was developing the Rune token on the Bitcoin network using the Ethereum Protocol.
We raised $5 million in our initial token sale in the first week and reached a market cap of $20 million in just one month.
This project was a great combination of technical innovation and strategic marketing, and it was incredibly rewarding to see it succeed.
As another example, when I was working at Motorenn, one of the challenges I faced was optimizing transaction processing and ensuring security, which we solved by leveraging advanced tools and methodologies like Protobuf along with the Cosmos SDK to improve data serialization.
As you know, technical proficiency is essential for blockchain developers.
I work with a variety of technologies including Cosmos SDK, Ethereum, and Polygon etc.
And Also, Programming skills in Solidity, Rust, Python, and Go are also important.
In addition to technical skills, strong problem-solving skills, innovation, adaptability, and effective communication are key.
I think Blockchain is a rapidly evolving field, so the ability to learn and adapt quickly is very important.
Experience: 7 years
Yearly salary: $100,000
Hourly rate: $60
Nationality: 🇬🇷 Greece
Residency: 🇬🇷 Greece
Experience
Senior Blockchain Engineer
Protokol 2023 - 2024
•Integrated Protobuf as the main encoding library in the Cosmos SDK, leveraging its tools to enhance data serialization and communication, resulting in a 25% improvement in data transmission efficiency. •Tacked Node Client (Daemon) RunTx recovery middleware, ensuring transaction integrity and reliability, and reducing transaction failure rates by 15%. •Leveraged Tendermint for secure and efficient transaction processing, improving throughput by 20% and enhancing fault tolerance. •Optimized the core ABCI message handlers (CheckTx, DeliverTx, BeginBlock, EndBlock) to ensure efficient transaction validation and processing, resulting in a 30% improvement in transaction throughput. •Managed state transitions and processing of transactions during the DeliverTx phase, ensuring accurate and efficient state updates, contributing to a 25% reduction in block processing time. • Developed secure state-machines on top of CometBFT using the Cosmos SDK, implementing robust data persistence and transaction handling mechanisms, which resulted in a 40% increase in transaction processing efficiency and a 30% reduction in data inconsistencies. •Ran IBC protocols on the Cosmos Hub, facilitating seamless communication and transactions between independent blockchains. This led to a 50% increase in cross-chain transactions.
Blockchain Developer | Ethereum Specialist
Syntagma Labs 2019 - 2022
•Launched 4 P2E games, attracting 30,000+ players by developing games like CoinFlip, Blackjack, and Crash. •Implemented advanced NFT features using ERC-721, ERC-1155, and ERC-2535 standards, enhancing the functionality and upgradeability of deployed contracts. •Successfully directed 12 NFT projects, securing $8 million in funding and engaging 15,000+ users with features like NFT staking, launchpad, and minting. •Deployed 5 DAOs and 3 DEXs with token swap, escrow, and cross-chain bridge functionalities, processing transactions worth $50 million and involving 10,000+ users. •Facilitated over $20 million in token sales and staking for ERC20, BEP20, SPL, and other tokens, attracting a community of 25,000+ investors. •Motivated user engagement by 30% by integrating multiple wallet connections like MetaMask, Phantom, and HashPack across various DApps. •Supported a DeFi platform from Ethereum to Hyperledger, resulting in a 50% reduction in transaction fees and a 25% increase in platform user retention while maintaining cross-chain compatibility and security. •Used ERC-721 and ERC-1155 Solidity smart contracts on Ethereum and EVM-compatible blockchains, supporting diverse NFT and token use cases. •Contributed to the development and optimization of blockchain infrastructure, resulting in a 25% reduction in latency and a 40% improvement in performance. •Provided expertise in the transition to and maintenance of Proof of Stake chains, contributing insights that improved network stability and reduced staking-related issues by 20%. •Managed the launch of tokens on the ZK-rollup platform, achieving a 60% average staking participation rate through comprehensive tokenomics strategies and secure staking platforms. •Balanced a ZK-rollup chain operating on top of the Ethereum blockchain, enabling the execution of transactions off-chain while periodically committing transaction batches to an on-chain rollup contract. This resulted in a 50% reduction in gas fees and increased transaction throughput. •Supported Ethereum protocols and features related to Ethereum scaling solutions, including the integration of rollups and sidechains, leading to a 30% increase in transaction throughput.
Blockchain Developer
Metabloq.io 2018 - 2019
•Administered comprehensive NFT ecosystems including minting, presale whitelisting, OpenSea/LooksRare/Rarible listing, gifting/airdrops, wallet integration for minting and admin panel, custom minter/holder benefits, IPFS immutable storage, post-mint reveal, and bot protection, resulting in the minting of 100,000+ NFTs and $10 million in marketplace sales in the first quarter by developing scalable and user-friendly solutions. •Composed the Rune Token on the Bitcoin network using the Ethereum Protocol, raising $5 million in initial token sales within the first week and achieving a $20 million market cap in a month by designing and deploying the token contract and coordinating a marketing campaign. •Established a seamless payment system that integrated cryptocurrency payments via MetaMask and enabled NFT purchases with credit cards, increasing user adoption by 40% and facilitating over $1 million in transactions within the first quarter. •Applied multi-signature wallet functionality for secure custody of assets, enhancing Ethereum protocols and reducing unauthorized access incidents by 75% for high-value transactions. •Facilitated the integration of Layer 1 (Ethereum) and Layer 2 (off-chain VM) components, ensuring seamless communication and synchronization between the layers. •Managed the successful launch of multiple tokens across various standards, including ERC20, ERC404, CW20, BEP20, BRC20, SPL, Token2022, and HTS, driving a 70% increase in user engagement through innovative tokenomics strategies and effective marketing campaigns.
Full Stack Developer
Publisto 2016 - 2018
•Translated design and wireframes into high-quality code for landing pages for 5 new product concepts. •Created accessible, responsive, and functional UI to allow visitors on any device to have the same perfect user experience. This process increased the number of 5 stars UX/UI reviews by 135%. •Increased reporting speed of the internal analytics team by 24% by designing and implementing RESTful API services for the internal ERP of the company. •Enhanced unit testing coverage to 90% leading to 45% decline in production bugs using test automation. •Leveraged Knowledge in Full stack web development, HTML5, CSS3, Tailwind CSS, Javascript, TDD, Mocha, MVC, PHP, Laravel, Code Igniter, Bootstrap, jQuery, REST API, MySQL, PostgreSQL, GraphQL, Redis, PHPUnit, Java •Improved UI performance by 60% by identifying bottlenecks, using techniques like React Context API and hooks. •Increased system performance by 24% through the development of high-quality, scalable systems to support business-critical applications while working with the DevOps team following the CI/CD practices. •Implemented rich user experience by creating 20+ new features in a real-time chat application.
Skills