John Mark

John Mark BLOCKCHAIN & WEB DEVELOPER Details Belgrade, Serbia Profile A proficient lead developer with 6+ years of experience, interested in web & blockchain development. I have deep knowledge in blockchain architecture patterns, different blockchain standards and defi eco-systems. I am talented to design secured blockchain architecture based on solid technologies, develop application features and interfaces, and maintain client and server-side applications. I am very familiar with smart contract, new Token deployment based on ERC20 / ERC721 / ERC1155 / BEP20 / BEP721 / BEP1155. I have rich experiences in development for profitable DeFi platforms like staking, lending & borrowing, Yield farm, NFT marketplace & minting platform, NFT game (play to earn) and Crypto Launchpad based on several funding models like ICO/IDO/IFO/IGO. And also so much time's experiences with trading bot on several DEXs and protocols like Uniswap, Sushiswap, Pancakeswap, AAVE, 1inch, 0x… As a full-stack developer, I experienced several projects related with flexible and easy-to-use frontend (react.js/angular.js/vue.js), secured backend (Laravel/CI/Node.js) development and DB architecture / management (MySql/PostgreSql/MongoDB). Recently, I am also interested in Chat bot and AI, robotics and experienced some projects in practice. I am a fast life-long learner and looking forward to working on exciting and challenging projects. Email:-Phone: - Telegram: @khunter727 Whatsapp: - Skype: live:.cid.2582fcb5d42f768f NATIONALITY Filipino DATE / PLACE OF BIRTH - Severino Reyes St, Santa Cruz, Manila, 1008 Metro Manila, Philippines Skills Fast Learner Hard worker Computer Skills Team Player Excellent Communication Skills Employment History Senior Developer, Prime Holding JSC (fully Remote) Leadership and Teamwork Timeline management skills APRIL 2019 — JUNE 2021 ● ● ● Built prototypes to solve issues in projects by sharing analysis in detail and researching the best solution. Got access to the major financial services through a blockchain network and experienced the benefits of automation, a higher level of security, anonymity, interoperability, and transparency. From flexible design to smart contract audit, managed the whole process of project development Always on time Flexible schedule JS / TS PHP Python ● Smart contract development ● Defi solutions for Ecommerce ● Defi crowdfunding platform development Rust ● Crypto payment development Go ● Crypto Launchpad development ● P2P exchange development ● Created CI/CD pipeline for project, builds a custom docker image, stores the artifacts in AWS S3. Solidity Truffle / Hardhat Web3.js / Ether.js ● After launch and deliver, shared customers easy-readable guide and process the feedback, keep maintainance up to certain days. Senior Developer, Ebunch.ca (fully Remote) JANUARY 2020 — FEBRUARY 2021 ● ● ● ● ● Languages Analysis the project requirement in detail and confirmed the core functions and UX/UI design style, set basic timeline for development, shared development schedule for each steps Chinese According features & function, set phrases for staking, lend/borrow, yield farming, NFT marketplace Trading, Market Researching, Sports Full-stack development for secured smart contracts and flexible, userfriendly frontend. During development, enjoyed sharing updates with client and so busy with listening and confirms of his additional requirements Senior Software Engineer, Konect.ai (fully Remote) JANUARY 2018 — DECEMBER 2019 Interfaced with several crypto-exchange APIs like KuCoin, Binance, Bittrex, Bitfinex, OKEx, Poloniex, Huobi, and CCXT. ● Used REST APIs, WebSocket APIs and GraphQL. ● Developed dashboard includes LP pair transaction list, trading view to show and analysis token metadata, real-time price changes on several blockchains (trustwallet repo, bscscan, coingecko, coinmarket cap APIs) Saved time-sensitive data into a Redis database and provided database clients to retrieve data through a simple interface. ● Developed asyncio implementations for asynchronous operations. ● Used cfscrape (a Python library) to bypass a Cloudflare anti-bot page. Junior Software Developer, Hireplicity Inc. OCTOBER 2016 — DECEMBER 2017 Built a web-based intranet application to streamline the process of managing in-house training data within the organization. ● Japanese Hobbies NFT minting platform development ● English According the progress, passed several steps for demo -> beta -> live version. NFT marketplace development ● MySQL / PostgreSQL / MongoDB Analysis the project requirement in detail and confirmed the core functions and UX/UI design style, set basic timeline for development, shared development schedule for each steps. Defi yield farming development ● React.js / Next.js / Angular/ Vue.js Covered the whole process from plan step for business analysis to launch step for Defi platform development as a team leader Defi staking platform development ● Laravel / CI Worked closely with the project champion, stakeholders, and users to learn the business workflow and identify the pain points that could be eased with automation. Full-stack blockchain developer, UPWORK (fully Remote) JANUARY 2014 — MAY 2020 ● Built fully-features defi platforms like stakinig, yield farm, NFT marketplace, lend/borrow system to make profits. Solidity/Truffle/Hardhat/Ethereum & BSC, Rust/Solana, TypeScript, React, Redux, Web3.js, SubGraph. ● ● ● ● ● ● Built decentralized applications as perfect solutions to implement newly unique idea from client, act as a great partner and advisor for making decision in project requirement details Developed scripts for telegram bot listening token price data and auto trading bot and implemented several strategies for front-run/arbitrage bots Improved and upgraded the development tooling and workflow for several projects (TypeScript & Python). Coordinated the scrum process and helped improve communication within and between teams as scrum master for two teams. Developed a blockchain explorer and cryptocurrency accounting system for Bitcoin and Ethereum. Implemented a method for efficiently tracking the flow of funds between different addresses. Education Bachelor's Degree of Information Technology, De La Salle-College of Saint Benilde, Manila APRIL 2011 — MARCH 2012 Bachelor's Degree of Computer Engineer, University of Belgrade APRIL 2012 — JULY 2016