hi, I'm Hikaru Saito.

Crafting blockchain applications that feel as good as they look

About Me

01

Nice 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

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React + Three.js + Next.js
React + Next.js + TailwindCSS + Solana + Blink
HTML + CSS + JavaScript + Solidity
React + Next.js + Flow Blockchain + Ably + WebSocket
React + Next.js + TailwindCSS + Rust + Move
React + Next.js + TailwindCSS + Solidity
React + Next.js + TailwindCSS + Python + PostgreSQL
Next.js + Prisma + Supabase + Flow Blockchain
React + Next.js + TailwindCSS + Solana
React + Next.js + TailwindCSS
React Native + Okto SDK
React + Next.js + TailwindCSS + Whop API + SnapTrade API
React + Next.js + TailwindCSS + Whop API + Sports Game API
React + Next.js + MUI + MongoDB + Node.js + Express.js + Whop API
React + Next.js + MUI + MongoDB + Node.js + Express.js + Whop API

Certifications

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Professional 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

ReactJSXComponentsHooksState ManagementPropsFrontend ArchitectureUser Interface Design

Software Engineer

HackerRank • 2025

Credential ID: 7022cd0b85d9

Comprehensive software engineering certification covering algorithms, data structures, problem-solving methodologies, and software development best practices

AlgorithmsData StructuresProblem SolvingSoftware DesignCode OptimizationSystem DesignDebuggingTesting

JavaScript (Intermediate)

HackerRank • 2025

Credential ID: 73dc27eaacce

Advanced JavaScript certification covering ES6+ features, asynchronous programming, closures, prototypes, and modern JavaScript development patterns

JavaScriptES6+Async/AwaitPromisesClosuresPrototypesModulesFunctional Programming

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

Node.jsExpress.jsFile SystemHTTP ServersnpmEvent LoopMiddlewareAPI Development

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

REST APIsHTTP MethodsAPI DesignAuthenticationStatus CodesJSONAPI DocumentationWeb 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.

Contact Me

04

let's Work Together!

Reach out to me and let us discuss opportunities to work together.

#Discord#GitHub

contact

(+81) 80-4777-1032

hikaru.saito.tech@gmail.com

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