Leland Manh - Back-end developer

With over 5 years of hands-on experience in PHP development, I have honed my skills in building robust and scalable web applications using the Laravel framework. My expertise lies in leveraging Laravel's powerful features and tools to create efficient, maintainable, and feature-rich solutions. I am passionate about staying updated with the latest industry trends and best practices to deliver innovative and high-quality software.

Project list

DMS

DMS is Data management system used to monitor states of multiple indices (like fumes, water, wind, ...). these data will be sent from other service after certain period of time (5, 10, 15, 60 seconds) and will be saved as files in server, the system has to take new data from files and save it to system. Each indice will have different time, data structure and unit, admins can config new indice (structure, unit, time interval). The DMS displays the saved data in real-time charts on a board. Whenever there is new data comming into server, the chart will automatically updated, if one indice crosses the maximum or minimum line, the system will alert the administrators though notification (in browser), zalo, mobile app and mail.

- Read data from files, the other service can send one for multiple files at a time, and it can send the old data, or resend the missing data. The system have to merge all of it to make sure at one time, there is only one record of that indice. - There will be a lot of data, so we have to optimize query to get data for realtime-chart, delete the old data while other process still running. - Read requirements, communicate and confirm specs with customer. - Design system architecture database. - Build entire backend logic.

Technologies: Laravel, SNS, Redis, Docker, MySQL

DBAC

The system allows users to create bots to play baccarat. Users can specify the logic and betting tactics for each bot, as long as when the bot should stop playing. The system retrieves the result for each turns from other service and calculate the earning for each bots.

- Handle enormous amount of bots (approximately 30000 to 100000 bots per turn), so there will be a lot of logic need to be handled in 1 turn (time of one turn will be 45 seconds), all the money of the bots must be calculated before next turn. - Optimize the performance of database queries, working with a lot of data (There will be about 12.000.000 new betting history per day). - Delete old data. - Handle logs to trace when there is any problem. - Be responsible for logic caculating betting results, delete data and log data.

Technologies: Laravel, SNS, Redis, Docker, MongoDB, MySQL

MINERVA

The project is a database for information on capital raising, investment, mergers of corporations and startups globally. The system provides users with information on capital raising, investment, mergers of corporations and startups around the world. Users can explore many types of information about a business from organizational structure, fundraising information to investment deals and related information. The data in the system are crawled from third-party service, we have to analyze and structure them to fit the system.

- The main feature of the system is to search the needed information so we have to design database structure to optimize search query - Be responsible for designing database structure, searc flow and store-crawl data.

Technologies: gRPC, PostgreSQL, MongoDB, Redis, Docker

LUC

This system allows users to play baccarat (This system and the DBAC system is related), just like other baccarat website, this system will have multiple tables, users can enter one table and play.

- Handle concurrent calls when user click bet too fast. - Working with large data (in relational database) - Be responsible for betting logic. - Read requirements, analyze and design database for new features.

Technologies: Laravel, SNS, Redis, Docker, MySQL

CARTESI

Cartesi Rollups is a flatform supports non-blockchain dev can develop a decentrialize application without learning to build smartcontract. The purpose of project is to try and get used to the platform by building a voting dapp. A voting dapp allows users vote other's campaign and create their own campaign.

- Understand the concept of the platform - Be responsible for backend logic

Technologies: Python, SQLite, Docker

Project list

Education

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