Kasper

Sinisoo

• Developed the $Frost DeFi token and the gaming contracts on the BSC using Solidity. • Developed the Migration system of the users and their assets(NFT, node, items) from Avalanche to BSC by developing the migration contract and Migration app with React, Node.js, and implemented web3 integration using wagmi/viem. • Developed the Game UI (item purchase page) with React + styled-component and implemented web3 integration • Created the backend on GAE/GCP, built web app frontends with Vercel, and managed the MongoDB database on MongoDB Cloud Service.

• Created the UI of a NFT marketplace and Dapp using React, and MobX with UI/UX and Pixel-Perfect sense. • Developed and maintained web applications using React hooks and react-query. • Implemented data visualization projects using D3.js to convey complex information effectively. • Built a secured backend system capable of efficiently managing high-volume transactions, enabling wallet login and OAuth integration, and constructing a smart contract event subscription system with Nest.js, MongoDB, and ethers.js. • Developed Defi Token, NFT, Claim and Reward contracts, and a Marketplace contract using Solidity, Openzeppelin library, and Hardhat. • Implemented cutting-edge blockchain technology to optimize transaction speed and minimize gas fees, thus enhancing the deployment process. • Implemented web3 integration with web3.js, ethers.js, and web3-react. • Leveraged CI/CD tools such as GitHub, AWS, Jenkins, and Docker to optimize software development and deployment and automated testing wo

• Developed Wellness & Fitness website & Food Delivery & Ride Ordering Platform with React, Next.js, Node.js, Express.js, and Nest.js (100% TypeScript) • Implemented well-responsive and user friendly UIs with Material UI. • Implemented RESTful API and GraphQL API integration with Apollo GraphQL (server/client). • Used PostgreSQL with SequelizeORM • Implemented end-to-end testing, functional testing and unit testing with Cypress and Mocha/chai • Used the AWS such as EC2, Lightsail, S3, RDS, DynamoDB, ECS, Redis, Cloudfront, Route53 and so on. • Implemented the Twilio Integration for email verificatio, SMS messaging, and voice & video calling • Developed the serverless functions by using the AWS Lambda • Packaged, distributed, and run the applications by using Docker and Kubernetes

• Proficient in HTML, CSS, and JavaScript. • Developed multiple high-traffic websites with Shopify, React, Node.js, Express.js, PostgreSQL, and MongoDB. • Implemented well-responsive and user friendly interface with Shopify themes, Material UI, SCSS/SASS, and BootStrap • Utilized GitHub and Bitbucket as the primary code version management tool, ensuring efficient collaboration, code quality, and version control. • Implemented robust and maintainable code, ensuring the long-term stability and performance of web applications. • Implemented robust RESTful APIs to facilitate efficient data communication between Frontend and Backend, ensuring high performance and scalability. • Played a pivotal role in optimizing website performance, resulting in significant improvements in load times and user engagement. • Actively participated in code reviews, mentoring junior developers, and sharing best practices to foster a culture of continuous improvement within the development team.