takeda0129

Full Stack & Blockchain Engineer

Hello Dear

I am writing to express my interest in the Blockchain Full-Stack Developer position. 
With over 10 years of experience in full-stack development and the past 2 years specializing in smart contract development at OMG Company (UK), I bring a proven track record of delivering secure, scalable, and high-quality blockchain solutions.
Throughout my career, I’ve developed and deployed numerous smart contracts using Solidity, Haskell, and Rust, supporting platforms built on Ethereum, BSC, and Solana. 
My work is guided by best practices in smart contract auditing, secure coding, and clear documentation, ensuring that both clients and future developers benefit from robust, maintainable systems.
On the front end, I have deep expertise with React, Vue.js, Next.js, and TypeScript, and I regularly integrate them with blockchain interfaces using Web3.js. 
On the back end, I work with Typescript, Node.js, MongoDB, and MySQL, building secure APIs and performant services to support decentralized apps.

What I Bring to the Table:

Fluent English and strong communication skills
A proactive, fast-learning mindset
Ability to work independently or as part of a team
A client-first approach, with a focus on clear expectations and timely delivery
A passion for building secure and scalable blockchain products

Why Hire Me?
I take pride in delivering results that exceed expectations. 
I value clear communication, adaptability, timeliness, and technical excellence. 
My goal is not just to meet requirements but to become a long-term, trusted contributor to your project’s success.
I would welcome the opportunity to discuss how I can contribute to your team. 
Let’s connect and build something great together.

Thank you for your time and consideration.


Experience: 5 years

Yearly salary: $120,000

Hourly rate: $50

Nationality: 🇺🇸 United States

Residency: 🇺🇸 United States


Experience

Senior Back-end & smart contract developer
OMG
2022 - 2024
• Deployed 20+ smart contracts across Ethereum, BSC, and Solana supporting $12M+ in assets • Led backend for a DeFi platform serving 150K+ monthly users with <200ms response time • Implemented Web3 wallet integrations with Metamask and WalletConnect, achieving a 32% boost in user conversion by enhancing transaction speed and user experience. • Optimized smart contracts with advanced Solidity techniques, achieving an 18% reduction in gas fees and significantly improving scalability and cost-efficiency for decentralized applications. • Led audits with cross-functional teams to eliminate software vulnerabilities, achieving a 100% vulnerability-free record. • Mentored 4 junior developers to master Flask and Web3.js, improving team output by 25% and advancing project deadlines while developing team skills.
Blockchain Engineer
Infinite Uptime
2019 - 2022
• Spearheaded the development of an NFT marketplace that reliably processed over 10K daily transactions using ERC721/1155 standards, boosting user engagement and scaling platform capabilities. • Developed and launched a proprietary trading platform by customizing Uniswap/Bancor protocols, enhancing trading capabilities and serving an active user base of over 50K. • Developed and implemented DeFi staking and swap protocols, resulting in over $5M in total value locked (TVL) and enhancing platform reliability and user engagement. • Implemented advanced Bitcoin multisig strategy, achieving a 40% reduction in fraud incidents and significantly boosting security infrastructure. • Enhanced smart contract flow efficiency by 22% through implementing Web3.js and Docker, significantly accelerating transaction processing time.
Smart contract Engineer
Mezurashico
2017 - 2019
• Delivered 10+ token launches using Solidity and Node.js, boosting the efficiency of blockchain transactions and increasing project success by implementing smart contract solutions • Enhanced system performance and user experience by scaling backend APIs for over 20K daily active users using MongoDB • Reduced production bugs by 35% through collaborative QA and design efforts
Full-stack Developer
Fixer
2011 - 2014
• Designed and implemented complex systems utilizing Vue, Angular, Django, and Laravel, significantly improving application speed, scalability, and user satisfaction. • Developed and implemented automated Python pipelines, achieving a 60% reduction in manual input, which improved process efficiency and saved over 20 hours of labor per week. • Integrated legacy data systems (Oracle/COBOL) to manage over 100TB of data, significantly enhancing data accessibility, system efficiency, and reliability.

Skills

haskell
laravel
mongo
nextjs
node
react
sql
typescript
vue
solidity
english
japanese