hi, I'm Hikaru Saito.
Crafting blockchain applications that feel as good as they look
About Me
01Nice to meet you, I'm Hikaru!
I'm a Full-Stack Developer focused on building fast, reliable, and user-friendly products across modern web stacks. I enjoy turning ideas into polished applications with clean frontend experiences and solid backend systems.
A big part of my recent work has been Whop app development, where I build features using the Whop API, connect third-party services, and deliver production-ready experiences with strong UX and dependable business logic.
Alongside that, I also bring blockchain and Web3 experience as an additional skill set. That background helps me work comfortably with smart contracts, wallet integrations, and decentralized product ideas when a project needs them.
I like building products that feel smooth and practical for real users, whether that means creating scalable full-stack platforms, improving internal tools, or shipping specialized app experiences for creator and community ecosystems.
In my free time, I like experimenting with new ideas in blockchain gaming and smart contract design, as well as exploring creative technologies like Blender and digital art.
I also enjoy playing games — from anime and manga to interactive storytelling — which inspires the design and interactivity in many of my projects.
Resume
02'Hikaru Saito' - Blockchain Full-Stack Developer
Blockchain Full-Stack Developer with 7+ years of experience in building secure, scalable, and high-performance decentralized applications. Proficient in Solidity, Hardhat, Foundry, React.JS, Next.JS, Node.JS, and Python, with strong expertise in blockchain protocols, smart contract development, and Web3 integrations. Experienced in developing and maintaining blockchain infrastructures, including Bitcoin Stratum servers and RPC-based communication with blockchain nodes. Skilled at creating efficient backend systems and user-focused dApps that connect on-chain and off-chain logic seamlessly. Passionate about blockchain innovation, performance optimization, and delivering clean, reliable solutions that push the Web3 ecosystem forward.
skills
Full Stack Development
- Frontend: React.js, Next.js, TypeScript, TailwindCSS
- Backend: Node.js, Express.js, Nest.js, GraphQL
- Databases: PostgreSQL, MongoDB, Firebase
- DevOps: Docker, AWS, Vercel
- Version Control: Git, GitHub, CI/CD
Web3 & Blockchain
- Smart Contracts: Solidity, Rust (Solana), Hardhat, Foundry
- DeFi & Trading: CEX, DEX, Automated Market Makers (AMM), Trading Bots
- Tools: Ethers.js, Web3.js, Moralis, IPFS
Additional Skills
- Programming Languages: JavaScript, TypeScript, Python, SQL, C#
- Mobile Development: React Native
- Platform Integrations: Whop API (app development), webhooks, third-party APIs
- Cloud Platforms: AWS, Azure, Vercel
- Architecture: Scalable Architectures, Distributed Systems
- Problem Solving: Algorithm Design, Data Structures
careerOverview
Rikkeisoft
Senior Blockchain Developer
June 2020 - January 2025
Technologies: Solidity, Rust, Firbase, React.js, Next.js, Team Leadership
SotaTek
Blockchain Developer
January 2018 - May 2020
Technologies: JavaScript, Node.js, Next.js, Smart Contracts, Solidity, Enterprise Integration, Automated Testing
view my resume in the LaTeX format by clicking on the following.
Projects
03Certifications
04Professional Certifications
Validated expertise in modern web development technologies and programming languages through industry-recognized certifications from HackerRank.
Frontend Developer (React)
HackerRank • 2025
Credential ID: 3cabff338415
Certified in React frontend development including component architecture, state management, hooks, JSX, and modern React patterns for building scalable user interfaces
Software Engineer
HackerRank • 2025
Credential ID: 7022cd0b85d9
Comprehensive software engineering certification covering algorithms, data structures, problem-solving methodologies, and software development best practices
JavaScript (Intermediate)
HackerRank • 2025
Credential ID: 73dc27eaacce
Advanced JavaScript certification covering ES6+ features, asynchronous programming, closures, prototypes, and modern JavaScript development patterns
Node.js (Intermediate)
HackerRank • 2025
Credential ID: e7f582ad64dd
Intermediate Node.js certification covering server-side development, file system operations, HTTP servers, npm package management, and backend architecture
Rest API (Intermediate)
HackerRank • 2025
Credential ID: deecf2564032
RESTful API development certification covering HTTP methods, status codes, API design principles, authentication, and best practices for building scalable web services
About HackerRank Certifications
These certifications validate practical programming skills and problem-solving abilities in real-world scenarios. Each certification includes hands-on coding challenges and demonstrates proficiency in modern development technologies essential for blockchain and full-stack development.