Nantu Das

Senior Software Engineer

Karatbars Software Solutions Limited•  October 2017 - Present

Designed and developed Django based blockchain web application Minebase (https://minebase.com/). Supervised and lead a team of software engineers during the development of scalable cryptocurrency payment gateway (Python, Django, Django Channels, PostgreSQL). Designed and developed smart contracts to be deployed on the Ethereum network in accordance with business requirements. Wrote Django test suites for Python based crypto projects using Pytest. Build CI/CD Pipeline with Jenkins, Python, Docker and Git. Refactored about 30% of legacy code, fixed bugs and improved performance up to 40% in PHP based E-Commerce integrated MLM Software (https://fb-universe.com/). Improved and optimized all the payment gateways of e-commerce project to improve the performance by 10% in an efficient, timely manner. Implemented automated test in PHP project using Codeception and PHPUnit. Created and used a script for deploying PHP project’s updated files in live server using Capistrano. Reduced time for deploying to the live server by 80%. Applied Liquibase to automate MySQL database alters script in live deployment. Analyzed and developed decentralized application (Karatbit) using blockchain technology and Laravel framework (https://karatbit.com/). Maintained and improved existing PHP based web application employee and project management system Tracker (https://tracker.kb-vision.at/). Lead a team of 3 members in the development of e-commerce features implementation and project code improvements. Built innovative Microservices and Web Services application using Spring Boot, RabbitMQ and Docker. Install and configure different services such as NginX, Apache, PHP, MySQL, Docker, RabbitMQ, Redis, ELK Stack and Bitcoin node in cloud platform such as DigitalOcean, Vultr. Reduced the server management cost of e-commerce and blockchain projects maintenance by 25% in 2020. Mentored Junior Software Engineers to set goals and focus on the tasks and business requirements.

Senior Software Engineer

Genuity Systems Limited•  May 2011 - September 2011

Developed gTalk Pinless Calling Service using CodeIgniter Framework (https://www.gtalk.us/pinless). Designed and developed Real Estate Project Management System using CodeIgniter Framework (http://www.genusys.com.bd/clients). Developed web-based call center software gPlex Contact Center. Implemented Dhaka Bank Go mobile app back-end API. Integrated various third party API’s using SOAP/XML. Developed VoIP service-based software gPlex Soft Switch. Upgraded PHP CodeIgniter and other framework applications to fit adapting client needs. Ensured smooth communication between the development team and the client, focusing on a correct transition of the requirements and specifications. Review and improved MySQL queries and optimized PHP code for better performance. Maintain, coordinate, control and monitor in planning, design, development and implementation phases of various assigned projects to ensure optimum success. Trained and mentored junior developers in PHP based web applications and Mobile app development and working to improve overall team performance.