this is my resume.
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Topias Kallio
Blockchain Developer
Finland • <PRESIDIO_ANONYMIZED_EMAIL_ADDRESS>

SUMMARY

Experienced blockchain developer with over 6 years of experience building blockchain networks and developing complex smart contracts to ensure success and achieve goals.  Mastered Solidity, Rust, and CosmWasm to build blockchain networks, and develop fast and secure smart contracts. Demonstrated success in implementing cross-chain communication using IBC protocol. Have deep knowledge of cryptography, consensus algorithms, data structures in distributed systems, DeFi, and crypto financial concepts. Possesses strong analytical and problem-solving skills, with a track record of delivering high-quality solutions on time and within budget. Expertise includes developing and auditing blockchain smart contracts with various Blockchain frameworks including Ethereum, Binance Smart Chain, Solana, and Cosmos SDK.

PROFESSIONAL EXPERIENCE

BLOCKAPPS	New York, United States
Lead Blockchain Developer (Remote)	Mar 2020 – May 2023
BlockApps is a blockchain as a service company that develops enterprise blockchain platforms.
●	Designed and implemented a blockchain-based supply chain using cosmos SDK to track and verify the genetics of their cannabis strains, increased supply chain transparency and reliability
●	Optimized the smart contract code and increased the efficiency by 15%, using sophisticated data structures and the library functionalities of the Rust, and CosmWasm
●	Lead development of the DeFi protocol focusing on interoperability with other DeFi protocols, ensuring high levels of security and scalability that attracted 15,00 loyal supporters
●	Built 3 reusable cross-chain libraries using IBC functionalities of CosmWasm and increased the user base of the DeFi protocol by 37%
●	Participated in the development of a blockchain-based voting system for a community governance project, ensuring transparency and security in the voting process
●	Led an infrastructure migration of legacy service to modern AWS architecture utilizing Lambda, AWS CDK, S3, API Gateway, and more
●	Introduced and implemented continuous integration/continuous deployment (CI/CD) practices, reducing the application deployment time
●	Implemented agile development practices and worked with a team of engineers to deliver high-quality products on time and within budget

Empirica Finland	 Finland
Ethereum Developer	Oct 2016 – Feb 2020
Huobi Global offers a wide range of cryptocurrency trading services, including spot trading, margin trading, futures trading, and staking.
●	Created a defined process for the team to set up NFT drops with a user interface for customers to mint and claim NFTs from their creative economy platform
●	Designed, developed, and deployed ERC721 and ERC1155 Solidity smart contracts for the Ethereum and EVM-compatible blockchains
●	Deployed contracts on Layer 2 chains such as Polygon or Optimism to allow the platform and its customers to save transaction gas fees of about 30% when using cryptocurrencies
●	Helped create an upgradable contract system through a proxy contract system to ensure maintainability and reliability
●	Designed and implemented an automated testing framework for smart contracts using Truffle suite, reducing the time and effort required for testing by 50%
●	Developed and executed test plans for smart contracts to identify and address potential vulnerabilities prior to deployment
●	Worked with a team of engineers to deliver high-quality software on time and within budget

EDUCATION

University of Eastern Finland	Finland
Bachelor’s Degree in Computer Science	Jan 2013 – Dec 2016

SKILLS

●	Languages: C/C++, Golang, JavaScript, Python, Ruby on Rails, Rust, Solidity, TypeScript
●	Frameworks: Cosmos SDK, CosmWasm, Express.js, Node.js, Next.js, React, Web3.js
●	Databases: BigchainDB, Cassandra, ChainifyDB, MongoDB, Oracle, PostgreSQL 
●	Platforms: Amazon Web Services (AWS), Ethereum, Juno, Microsoft Azure, Optimism Solana, Osmosis, Polygon 
●	Program Management: SDLC (Software Development Life Cycle), Resource Planning, Jira, MS Project