Suzuki Kenji (鈴木 健二)Senior Software Engineer | Full-Stack, AI & Blockchain Systems Architect
Profile

Senior Software Engineer with 7+ years of experience building scalable web, cloud, AI, and distributed systems across startups and enterprise environments. Specialized in full-stack architecture using modern frameworks such as React, Next.js, Node.js, and Python-based backend services.

Experienced in blockchain infrastructure including smart contracts, DeFi protocols, tokenized systems, and Web3 integrations across platforms such as Ethereum, Polygon, and Solana.

Since transitioning to freelance consulting in 2025, focused heavily on AI - driven software solutions including LLM integration, AI agents, retrieval-augmented generation (RAG), automation pipelines, and intelligent analytics systems. Passionate about building secure, scalable, and high-performance products that bridge traditional software with emerging technologies.

Professional Experience
Freelancer — Senior Software Engineer (AI / Full-stack / Blockchain)
  • •Deliver end-to-end software consulting for startups and enterprise clients across AI, full-stack, and blockchain domains
  • •Design scalable cloud-native architectures for AI-powered SaaS platforms, automation tools, and analytics systems
    • 04/2025 – PresentGlobal
  • •Build intelligent applications using LLMs, RAG pipelines, vector databases, and AI agent workflows
  • •Develop production-grade APIs and backend services using Python, Node.js, and distributed cloud infrastructure
  • •Integrate blockchain infrastructure with modern web applications including smart contracts, wallet systems, and on-chain analytics
  • •Lead architecture decisions, technical planning, and performance optimization for complex software systems
    • Blockchain Solution Architect, Consensys Company
  • •Architected enterprise-grade blockchain ecosystems for finance, supply chain, and digital asset platforms
  • •Designed secure distributed infrastructures using private and consortium blockchain networks
    • 04/2023 – 03/2025USA
  • •Led smart contract architecture and security reviews for high-value transactional systems
  • •Collaborated with stakeholders to translate business requirements into scalable technical architecture
  • •Improved transaction transparency, auditability, and operational efficiency through decentralized infrastructure
    • Blockchain Developer, Consensys Company
  • •Developed decentralized applications (dApps), smart contracts, and blockchain APIs
  • •Implemented token standards including ERC-20, ERC-721, and ERC-1155
    • 01/2021 – 03/2023USA
  • •Built Web3 integrations for wallets, on-chain transactions, and DeFi protocols
  • •Performed contract testing, gas optimization, and security validation
  • •Worked closely with frontend teams to deliver production-ready blockchain products
    • Full Stack developer, GMO Internet Group
  • •Built responsive internal platforms and customer-facing web applications
  • •Developed backend APIs and frontend interfaces for business tools
    • 03/2020 – 12/2020Tokyo, Japan
  • •Improved system performance and usability across multiple products
  • •Collaborated with designers and engineers in agile workflows
    • Frontend developer, GMO Internet Group
  • •Built dynamic interfaces using JavaScript frameworks and reusable UI components
  • •Developed dashboards and customer portals focused on usability and performance
    • 10/2019 – 02/2020Tokyo, Japan
  • •Improved responsiveness and browser compatibility across products
    • Intern, GMO Internet Group
  • •Focused on gaining hands-on experience in web development.
  • •Worked with HTML, CSS, and JavaScript to support the development of basic company websites and internal tools.
    • 04/2019 – 10/2019Tokyo, Japan
  • •Understand project workflows, debug front-end issues, and collaborate with senior developers to implement responsive design principles.
    • Education
    Bachelor of Information Technology, Hosei University

    I studied computer and programming languages in the Department of Information Science during college. I received a bachelor's degree in computer science upon graduating from college.

    2015 – 2018Tokyo, Japan
    Skills
    Language

    JavaScript, TypeScript, Python, Go, C++, C#

    Back-End

    Node.js, Express, NestJS, Django, FastAPI, GraphQL

    Blockchain

    Solidity, Rust, Move, Smart Contracts, DeFi, DAO, NFT, Tokenomics

    Front-End

    React, Next.js, Vue.js, Angular, Tailwind CSS

    AI

    LLM Integration, RAG Pipelines, AI Agents, Prompt Engineering, NLP Systems, Model Deployment, Inference Optimization

    Databases

    PostgreSQL, MongoDB