ivanenko

Senior Blockchain Developer

Senior Backend Developer | Blockchain & Crypto Expert | Forex Trading Specialist

As a highly skilled and results-driven Senior Backend Developer, I specialize in building robust, scalable, and efficient systems, with a strong focus on Blockchain, Cryptocurrency, and Forex Trading technologies. With over 8 years of experience, I have developed a deep understanding of decentralized networks, smart contract development, tokenomics, and trading algorithms, providing high-quality backend solutions that power financial services and digital asset platforms.

My expertise spans Ethereum, Solidity, DeFi protocols, and NFTs, with a proven track record of designing and deploying secure and gas-efficient smart contracts. I have also developed algorithmic trading systems, optimized for performance, to facilitate automated trading across multiple exchanges.

I bring a keen eye for solving complex problems, ensuring security, and optimizing performance in high-throughput environments. Whether it's building custom trading platforms, creating innovative blockchain solutions, or enhancing the infrastructure of financial applications, I thrive in fast-paced, cutting-edge tech environments.

Key Skills & Technologies:

Blockchain Development: Ethereum, Solidity, DeFi, NFT, Tokenomics
Smart Contract Development & Audits
Backend Architecture: Node.js, TypeScript, REST APIs, Microservices
Forex & Crypto Trading: Algorithmic Trading, Market Making, Exchange Integrations
Decentralized Finance (DeFi) & Liquidity Pools
Blockchain Security Best Practices & Audits
Database Management: SQL, NoSQL, PostgreSQL
Cloud Platforms: AWS, Azure, GCP
Continuous Integration/Continuous Deployment (CI/CD)

I am passionate about leveraging Blockchain and Crypto technologies to disrupt and innovate the financial sector, aiming to drive efficiency, transparency, and trust in the industry.

Experience: 4 years

Yearly salary: $80,000

Hourly rate: $40

Nationality: 🇫🇮 Finland

Residency: 🇫🇮 Finland

Experience

Software Engineer

BookBeam

2021 - 2023

I developed RESTful APIs using Java with Spring Boot and Node.js (Nest.js) for a web application that serves over 1 million users each month. On the frontend, I utilized Angular, React, and Next.js to create dynamic user interfaces. I employed Selenium and WebDriver to scrape data from Amazon and built a big data processing engine in Scala with Spark, designed to enhance sales on the platform. Additionally, I implemented a multithreading solution to optimize the scraping engine's performance. My backend work involved using MySQL, NoSQL (MongoDB), and GraphQL for efficient data management. I utilized JIRA as a bug tracking system to monitor and maintain the history of bugs and issues daily. Furthermore, I wrote unit tests for backend APIs using the Mockito testing library and provided technical support to the offshore team while overseeing their work on JIRA tickets.

Blockchain Developer

CRYPTO-INC

2019 - 2021

As a blockchain developer, I specialized in a diverse tech stack that included Next.js, Tailwind CSS, Solidity, Hardhat, GraphQL, PostgreSQL, Web3.js, and Ethers.js, working across various blockchains like Polygon, Solana, and Ethereum. My expertise played a crucial role in both front-end and back-end development for blockchain projects. Collaborating with my team through Jira ensured seamless teamwork, while GitHub facilitated effective version control. Notably, I contributed to HeroSwap, a widely adopted platform in the blockchain ecosystem, and served as the lead smart contract developer, focusing on Solidity and Rust for multi-chain environments, particularly for the Singular NFT Marketplace, which operates across multiple blockchains.

Freelance

Upwork

2016 - 2019

Providing a great customer experiences in web applications could help many companies and industries and worked based on pixel-perfect designs with modern design patterns and libraries. Solved some interesting and challenging issues that other senior developers had for companies. Improved problem solving manner by challenging difficult problems. Worked on small sized teams on-site within organizations, as well as solo. Built social network of young travelers for Friendealer Ltd. Developed front-end for logistic company.

Front-End Developer

Nanyang Tech Pte Ltd

2015 - 2016

Implemented websites, mobile applications, and landing pages from concept through deployment. Standardized all output with a new, responsive, mobile-first approach and strategy. Assessed UX and UI designs for technical feasibility. Collaborated with product team members to implement new feature developments.

Skills

api

backend

bitcoin

blockchain

blockchain-engineer

crypto

dapp

defi

ethereum

front-end

golang

integration

mobile

mongo

nft

postgres

python

redis

ruby

rust

smart-contract

sys-admin

ton-developer

trader

web3

solana

english

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