Otto

W.Chen

--Built and maintained the company’s website using PHP, MySQL, HTML5, CSS3 and JavaScript frameworks like Laravel, CodeIgniter, AngularJS. --Collaborated with designers, copywriters, and senior developers to create compelling and user-friendly websites. --Developed mobile-friendly version of ecommerce platform using AngularJS framework. --Built a responsive email template that was compatible with all devices (smartphones, tablets, etc.). --Learned to interact with clients, present designs and handle feedback on work. For this, used Github, Jira, Slack. --Performed regular website maintenance, including updates and security patches, to ensure optimal website performance.

--Developed and implemented front-end solutions for web applications using modern JavaScript frameworks (Vue, React). --Collaborated with designers and other front end developers on UI/UX best practices, resulting in improved user experience. --Developed and maintained a complex web application used by over 100,000 users to manage their finances. --Built an API for the app using Spring Boot, Python/Django, NodeJS/Express, MongoDB, and ES6 features such as async functions and classes. --Supervise junior developers, provide training and motivate team members.

--Integrated ChainCoin interface (staking and yield farming page) using web3 with smart contracts. --Developed smart contracts for decentralized lending platform on Ethereum blockchain. --Designed efficient and optimized solutions to keep gas usage low. --Audited smart contracts for NFT tokens and sales on Polygon/Matic.