Leo Mark Castro
Software Engineer
Carreer Summary
Software Engineer of more than 3 Years whose driven by my two core values: Solution Oriented and Progressive Learning. My first step on proposal and development is to understand the problem and help the client visualize the solution. With fast emerging technologies, I am also actively trying new technologies and is not afraid to take the initiative to use bleeding edge technology (with test-driven development). I am a chameleon of a team player, not bounded by roles but instead on the look out on how to help the team succeed. I am also a strong advocate of documentation and clean code, and is always looking for ways to improve the team's workflow.
Skills
Accumulated Tech Experience
Professional History
Xurpas Inc.
2023-2024
•Pre-Sales Software Engineer
2022-2023
•Software Engineer
3D Virtual Conference Metaverse - Backend Focus
>> Development of Unity-based Virtual Conference Platform with Video-Audio Streaming, File Sharing, Game Progress Saving and Chatbot Integration
- Lead the development of the backend requirements of the project
- Implemented Auth Service, Conferencing Solution using Agora, API interfacing with Avaturn 3D Objects and ChatGPT solution using Chatbase
- Integrated 3rd Party Booking Systems to listen for appointment scheduling and Webhook listeners for incoming bookings created on Hubspot Calendar
- Created automations for deployment using Docker, Github Actions, and AWS
- Production deployment using AWS ECS Fargate and AWS Amplify.
Food Truck Booking Web App
>> Book your next Food Truck Booking with Ease. Complete with Truck Management, Order Management, Review System, Proximity Based Recommendation and more.
- Took the role lead developer for the project, planning and executing both Frontend and Backend requirements
- Development of a booking system for food trucks. Users can select book trucks, manage availability, view pending and completed orders, leave reviews, and more.
- Admin dashboard that grants admin users the ability to manage trucks, view orders, and manage users.
- Integration with 3rd party services such as Google Calendar, Stripe, and Brevo.
- Developed a system to facilitate automated deployment using Docker, Github Actions, and AWS.
- Application was deployed on AWS ECS Fargate and AWS Amplify.
Casual 2D Shooter Game for Telegram
>> Defeat the hoard of Zombies incoming in this simple 2D Shooter Game for Telegram. Compete with your friends in the leaderboard!
- Developed a game for Telegram using Unity and Telegram BOT API
- Simple tap to shoot game with a leaderboard
- Integration of InApp purchase using TON Cryptocurrency with help of TON Play SDK
- Automatic login using Telegram Account, and weekly leaderboards update
- Game marketed on Indonesian Telegram Channels
Web3 Healthcare App
>> A Health Oriented Mobile App with Web3 Features
- Lead the development of smart contract that handles the App's NFT Features
- Collaborated and CoDeveloped with Backend Team to integrate web3 functionality in frontend and backend
- Optimized data fetching and syncing of ownership on both backend and web3 cloud by on demand fetch and caching of ownership, and softlocking of trasfers to save gas fees
- Collaborated with CPO and Project Manager to outline possibile features and integrations
- Deployed the smart contract on chain on Polygon Network
Game Token Nights
>> Casual Social Party Game with Token and NFT Integrations
- Lead the development of smart contracts needed to facilitate the Web3 features of the game
- Collaborated with Backend Team to integrate web3 functionality in frontend (React) and backend (Go Fibre)
- Implemented a Test Driven Development approach on the smart contract development
- Deployed Smart Contract on Devnet in order to verify the on-chain functionality of the program without spending actual budget on the project.
- Deployed the smart contract on the main net and was being used by the whole application in the current stages of the app.
- Initiated development of tools to quickly debug, observe and dispense tokens for QA testers in verifying the functionality of the app.
Movie NFT Collection
>> A Movie-tied NFT Collection
- Developed the smart contract that handles the NFT Collection
- Collaborated and co-developed with frontend developers in incorporating the Smart Contract functionalities into the ReactJS based SPA page.
- Collaborated with Project Managers about the approach on the NFT development along with the implications of each decision made in the development
- Deployed Smart Contract on Devnet in order to verify the on-chain functionality of the program without spending actual budget on the project.
Cryptocurrency Research and Development
>> Research and Development of Cryptocurrency focusing on Bitcoin, Ethereum, Solana and TON
- Research of the latest IT technologies, implementations and case studies.
- Fast Development and Prototyping of Proof of Concept application about said technologies in order to demonstrate possible work flows and considerations.
- Giving insights on duration and cost of development of projects.
- Development of Internal Tools to optimize and ease the development of related projects. (Token Minting for QA), (Smart Contract API similar to Swagger)
Freelance
2020 - Ongoing
•Commission - Web Development
2020 - 2022
•Upwork - Self Publishing Titans
Law Firm ERP System
>> Development of a custom ERP System for a Law Firm. Handle Event Scheduling, Case Management, Billing and Invoicing, and Document Management
- Acted as the lead developer for the project, guiding for both Frontend and Backend requirements
- Backend using Customized KeystoneJS Framework for GraphQL and REST API
- Frontend using Optimized NextJS Template with TailwindCSS and MantineUI
- Deployed with Docker and hosted on a VPS
- Implemented a calendar and email reminder system
- Case Management with Team-based Visibility of Events and Documents
- Billing and Invoicing System with PDF Generation and Email Sending
Event Schedule Management Dashboard
>> A Custom Dashboard incrementally built to help a business firm manage their events
- Acted as the lead developer for the project, guiding for both Frontend and Backend requirements
- Developed a full stack website using React
- Developed the backend using NestJS, Prisma and PostgreSQL
- Deployed with Docker and hosted on a VPS
- Implemented a calendar and email reminder system
Self Publishing Titans Website
>> Self Publishing Titans website, with built in puzzle generator, shops and articles
- Developed a full stack website using NextJS, ExpressJS and MongoDB
- Built web-app puzzle generators (sudoku, crossword, word search)
- Dynamic Blog Page
- Deployed on Digital Ocean App Platform
- Created a simple flask app to generate images using PIL and other python packages
Sales Trend Web Scrapper
>> Sales Web Data Scrapping in Amazon Websites using Python
- Developed a flask based micro site where teh scrapper, and logs of the scrapper can be viewed
- Used Selenium and BeautifulSoup to scrape data from Amazon
- UI was built using Sciter and Python
Personality Questionnaire Website and Dashboard
>> Thesis Project to create a personality questionnaire and dashboard of results
- Developed a full stack questionnaire and dashboard app using NextJS, Prisma and PostgreSQL
- Includes a custom Questionnaire UI
- Includes a dashboard to view results
Mechanical Pump Catalogue
>> A Mobile App to list, search, compare and compute various statistics about mechanical pumps
- Developed a mobile app using Ionic React
- Users can login and save bookmarks, auth and data were saved on Firebase
Personal Achievements
Certifications
AWS Certified Cloud Practitioner
>> Certification of completion for AWS Certified Cloud Practitioner
- https://www.credly.com/badges/657f2ffc-724f-422a-bd12-4889a3672bfe
Personal Projects
Water Scanner IoT
>> The goal is to install an IoT Water Quality Scanner on Rivers
- Development of an Arduino based microcontroller with Water Scanning Sensors such as pH, turbidity, temperature and TDS.
- Development of a NextJS + MongoDB based API server to receive the water scans.
- Development of Map to display the location of water scannings along with blips to indicate the perceived water quality of the water.
- Integration of SIM-based HTTP requests to send data over the internet.
- Integration of SMS based data sending and receiver to receive water quality data result over 3G unreliable places.
- Development of dashboard to facilitate received data and to avoid spamming of unrecognized data packets.
Leo Mark Castro
Software Engineer
Contact
Address:
Bulacan, Philippines
Email:
[email protected]
Phone:
(+63) 929-603-7309
LinkedIn:
https://www.linkedin.com/in/leo-mark-castro/
GitHub:
https://github.com/leomarkcastro
Website:
https://dev.leocastro.com
Education
Bachelor of Science in Computer EngineeringBulacan State University