Temikin Mengistu

An American-based PaaS company that provides cloud-based services for business owners to handle their business activity.

CLOUD SERVICES PROVIDED
• Order management
• Inventory management
• HR management
• Educational system management
• Blog management
• Tax management
• Worker management

I developed Python and AWS Lambda functions for the services mentioned above. We used microservices architecture for the platforms and integrated TaxJar, Stripe, Mapbox, and many more third-party APIs.

We implemented the Serverless Framework to build the Lambda functions with the entire platform hosted in the AWS infrastructure; we specifically used S3, API Gateway, Lambda, RDS, CloudWatch, and CloudFormation, among others.

We also chose Docker to containerize the services and Docker Compose to deploy the services. I worked actively with all the tech mentioned with one other back-end developer.

My most significant achievement on this platform was converting the existing codebase to support multitenant architecture, supporting multiple business owners to manage their businesses.

Escaply is a web-and-mobile application that focuses on combining education materials with technology making it an ideal edutech candidate. Originally rooted in the Escape the Room game that everyone enjoys, Escaply digitized this game to make it easier for teachers to be their most creative versions by allowing them to create puzzles and quizzes their students must solve to escape rooms. This, in turn, allows students to experience school through a different lens.

I was one of the back-end developers in this project. I was mainly responsible for payment integration with the Stripe API, caching with Redis, handling the cloud infrastructure, implementing DevOps pipelines, and game session implementation.

We implemented the back end using Express with several tools on top of it, like Redis, JWT, AWS S3, and many more. The project is still in use in production, especially in a European country like Sweden.

We used CI/CD with three stages of development, including dev, staging, and production. We have used Jest to test the application and GitLab Runner on our server to facilitate the deployment process.

The back end used Docker to containerize the whole application, and MongoDB was our primary database.

An open-source Python SDK for the fast-growing payment gateway, Chapa. Chapa is a payment gateway that provides multiple payment methods for your business. This Python SDK implements all of what Chapa API can do, making sending requests easy on Python apps.

I developed it by myself, and it is now the official SDK for Python for Chapa.co.

Provided by HahuCloud, HahuSMS is a simple SMS gateway for sending free easy-to-use SMS messages via the HTTP API. You can send SMS messages to any mobile phone in the world.

I developed this project to make Python developers' lives easier. This project implements the HahuSMS API in Python. You can use this project to send SMS messages easily via the HTTP API.

This project is being adopted by many Python developers. It is hosted on the Python package index (PyPI) and can be installed using PIP.

Luci Engineering is a level-A construction company providing residential and commercial project services for over 20 years. The company is known in the industry as being one of the best and backed by an expert team of dedicated professionals who provide the best services to their clients, especially customer service.

I developed a site now used as a company landing page with a different domain. This project also included some HR work I produced and provided for internal use.

This bot can translate any language supported by Google Translate and it does it by implementing the Google Translator bot with the Telegram platform to make it easier to translate within any chat or conversation. The bot is straightforward, so a user can easily translate within the chat window itself instead of copying and pasting and going to another site.

I developed this bot, which has been used by more than 10,000 users in the first three months. Also, the source code is open, and it has been used by more than 40 developers to power their own bot instances.

I used Python and Google to facilitate the translation and the Telegram API to make the bot very easy and interactive.

Telegram Marketing Platform enables you to reach out to a massive number of telegram users. Currently, this platform has 700 million users, so it's a great platform to market a product. This platform lets you enter a user message, and it will send the message and product link to the user. It can reach more than 1,000 users per day because Telegram's AI manages activity, but in the meantime, your message will be sent out to more than 50,000-100,000 users, depending on the user number you've chosen.

I develop the whole application, including the front- and the back end.

The front end uses HTML, CSS, Bootstrap, and JavaScript. The back end was built with three subsystems with various features.

Back-end Subsystem Features:
• Web: handles web tasks like responding to requests from the website
• User Message Sender: message user along with several of its own instances
• User Discovery: a way to find users and send them from different groups, channels, and so on
• Automatic Account Creation: create an account to send a user message

This amazing system let me get my hands dirty with the following technologies: Async Quartz, MTProto, RabitMQ, Redis, and SMS services.

RoyalRocket is a new gambling game where a user can win any bet, including fast bets and instant payouts. This is a new generation gambling game. It makes it possible to win many times more in a shorter amount of time compared to other games. The game is built on a 100% fair system, which is currently the only real guarantee of fairness in the gaming industry.

I was one of the back-end developers to make this site. My work included collaborating with one other developer who didn't know the English language, but with consistent, hard work, we delivered high-quality results to our client on time.

My tech stack included Django, Django REST Framework, Celery, RabbitMQ, Redis, Docker, AWS, Nginx, Gunicorn, and PostgreSQL.

I also integrated Stripe payments as the main payment option for gamblers.

On a personal note, I really enjoyed working on this project.