11/2021 - Present

Senior Software Engineer

HODL Devs

• Developed a closed NFT marketplace on avalanche network using Next.js, TypeScript, C#, Nethereum and Solidity, where only verified artists can deploy series and mint NFTs.
• Integrated ImageIX to optimize image loading, compress images and achieve lower resolutions for improved website performance, resulting in a 47% increase in conversion rate.
• Implemented Datadog for monitoring and analytics, ensuring robust performance and quick identification of any issues.
• Developed a Governance DAO platform on BNB Smart Chain, enabling token holders to participate in voting processes that determine changes and updates to the protocol.
• Created customers' personal tokens on Solana with rust smart contracts using Anchor framework.
• Launched several NFT collections using Candy Machine and Metaplex on Solana.
• Integrated crypto fiat gateway on Ethereum that provides a fast and decentralized way to sell crypto for fiat and vice versa using Chainlink Oracles.
• Built an Ethereum-based web wallet as browser extension that empower customers s to exchange, store, and manage their assets securely via web wallet.
• Technologies: Web3, Blockchain, React, Next.js, Tailwind CSS, JavaScript, Django, Python, TypeScript, DeFi, Smart Contract, Solidity, Hardhat, Rust, GraphQL, IPFS, SQL/NoSQL, Git, AWS, Jira, CI/CD, Datadog, AI

02/2023 - 06/2024

Senior Lead Full stack Developer

RubberFlooring4u

• Led the migration of RubberFlooring4U, an e-commerce platform for rubber flooring products, from a traditional Shopify setup to a modern headless CMS architecture. Leveraged React/Next.js and Contentful to enhance SEO and optimize site performance.
• Managed complex content migration and content modeling within Contentful, strategically optimizing the number of content models to stay within budget constraints.
• Implemented advanced techniques to improve site speed and SEO, including server-side rendering with Next.js and image optimization with Gatsby. Achieved a 20% increase in user engagement and a 15% reduction in page load times, alongside securing a 100% SEO score.
• Successfully implemented AI features in shopping projects, such as AI-driven search functionalities that allow users to find products based on natural language input. Also built an AI chatbot for providing all day 24/24 customer support using RAG, HuggingFace, Python and Llama in admin side.
• Technologies: React, Next.js, Headless CMS, Contentful, Tailwind CSS, SEO, Gatsby, TypeScript, Node.js, Python, AI, GraphQL, RAG, HuggingFace, Llama

12/2021 - 10/2022

Senior Full stack & Web3 Developer

EcoToken

• Worked as a lead developer for core user experiences including both customer and admin side, as well as API caching and modular UI Kit, Web3.js and Wagmi.js for blockchain integration, and so on.
• Used Next.js and T3 stack (Typescript, Tailwind, TRPC), Prisma and TRPC for providing ORM for SQL queries, and used Subgraph for providing GraphQL Native Headless CMS powering mission-critical applications.
• Experience in Web3 especially Wagmi.js, developed smart contracts using Solidity with Remix, deployed NFT smart contract with Streamlit UI and Hardhat, worked with Chainlink Oracles data feeds, also forked with Pinata IPFS to store NFT pics and get the IPFS numbers to mint.
• Played a vital role in constructing scalable APIs and managing complex databases using Moralis and MongoDB, and used Husky, Deep Source, and Sonar Cloud for enhanced code quality and CI/CD.
• Technologies: React, Next.js, T3 stack, TRPC, Web3.js, Wagmi.js, Tailwind CSS, Subgraph, GraphQL, Solidity, NFT, Streamlit UI, Hardhat, Chainlink, Pinata, IPFS, MongoDB, Husky, Sonar Cloud

04/2019 - 09/2021

Full stack Developer

RealAdvisor

• Expertly executed the migration of the project from JavaScript to TypeScript, upgrading from Mui v4 to Mui v5, and transitioning from react-relay to Apollo for GraphQL.
• Did all sorts of work such as React/Next.js app development, backend Nodejs/Hasura/Postgres/Clickhouse development, researching and investigating problem-solving technologies, as well as many devops-related GCloud, Hetzner, Terraform etc things.
• Implemented user tracking and analytics system using Google Tag Manager, provided valuable insights into user behavior and helped data-driven decision-making.
• Improve SEO and performance(~8.5%) of the official website and other public pages which increased 35% conversion and 30s(0.6 per session) by refactoring the website with semantic html tags and optimizing meta titles and descriptions.
• Directed unit and functional testing work using Jest, Cypress and more. Wrote over 200 unit tests to guarantee a bug-free codebase.
• Technologies: React, Typescript, MUI, Apollo, GraphQL, Next.js, Node.js, Postgres, GCloud, Terraform, SEO, Unit testing, Cypress

10/2016 - 10/2018

Mid-level Full stack Developer

Rikkeisoft

• Developed a booking application using React and Laravel to let users book a service online and get real-time updates on their progress, increasing the customer acquisition and retention rate by around 50% in three months.
• Collaborated closely with designers to create clean and intuitive, responsive interfaces for web applications, utilizing various front-end libraries and techniques such as React.js, Bootstrap, MUI and so on.
• Implemented real-time chat functionality using Web Sockets, Laravel Queue, Pusher, Laravel Echo, cron jobs, and integrated Twilio for SMS, Stripe for payments, and email notifications, etc.
• As part of the development process, I utilized Docker containers to ensure seamless deployment across different environments, and led the successful migration of the project to AWS EC2, including the complex pipelines.
• Technologies: React, Laravel, PHP, Socket.io, Docker, Twilio, Stripe API, RESTful APIs, Git