This is an e-learning project with clients including districts and schools in USA but also private customers that can access the application for annual fee. The project started at the end of 2014 and was in production since early 2016.
From the start I was the only developer for backend and my tasks includes implementing API for Angular/React frontend, aggregating data for reports, email notification/reports and integration with third party systems/services like Clever, Sendgrid, GiftBit. I was also involved in deploying and maintaining dev & production environments. The application used:

• RabbitMQ - for notifications and events and asynchronous operations.
• Mongo DB - document database.
• Clever - used for synchronizing district/school data and also for allowing users to authenticate in the application directly from Clever system.
• Sendgrid - for sending emails using static templates.
• Others

This project was developed for one of the top providers for retailer loyalty solutions. This was the second project for this client. Project started in Nov 2018 and ended when was deployed in production and the maintenance phase started.
During this project I was part of the backend client team developing the API for frontend applications according with project specifications.
As part of the project I was also involved in specifications meetings and discussed different issues with client team members.

The project developed for this US based client was a reporting application that was intended to help management of the company to evaluate the current costs and issues for different categories of services provided by the company The system allows also client to extract data that can help for future decisions in the company strategy.
For this application the data had two different sources, one was the database that was accessed using Looker and the other one was the management system that used Airtable.
Application was React front-end and NodeJS backend. This was a small project, the team had 1 developer on frontend, 1 developer on backend (me), one developer on data source management (mainly involved in writing queries in Looker) and the project manager.

The project I worked on for this client was aimed at creating a comprehensive starting template for future projects within the company. As a full-stack developer, my role was to design and implement key features that are present in most of the company's projects, such as multi-tenancy, tenant management, user management per tenant, and user authentication and authorization.

One of the main goals was to establish a micro-services based architecture, which allowed us to update the platform project services independently of the custom project team. Additionally, I was responsible for managing the application access to secrets, including application configuration credentials and other sensitive data that was not saved in the database (using Vault).

I also contributed to the React client, fixing bugs and adding new features. To ensure that this project could be adopted by other teams within the company, I created technical documentation and provided support for other teams. This involved conducting technical meetings and presentations to demonstrate the features I implemented and to answer any questions that the team had. Overall, I am proud to have been a key contributor to this project, which will serve as a foundation for future projects at the company.

This client is one of the top providers for retailer loyalty solutions. The project was developed for one of the company's retailer clients. As part of this project I was assigned to the backend team which developed the API used by the frontend applications.
The project uses the micro-services architecture and I was involved from early specification discussions until the project was deployed in production. One of the components of this project was a Facebook Messenger bot that offer support for retailer's customers.

NodalCast was a project providing content management and also end-to-end solution including ingestion of content, monetization, support, user management and payment integration solution. The project had 2 frontend applications, one for customers and one for user and content management and internal reports. I was part of the backend team and I was involved in developing the API for frontend applications and reports data computing.
I was part of this project from the first specifications meetings until the project was deployed in production.

During this time interval I was involved in developing Seneca framework, working on main project or help developing some of its plugins. Some of the Seneca plugins developed by me (or where I helped) are:

• Seneca Web
• Seneca User
• Seneca Mail
• Seneca Mongo Store
• Seneca Postgres Store
• Seneca MySQL Store
• Seneca Level Store
• Seneca Riak Store
• Seneca Casandra Store

I was also part of teams that implemented other open source projects like:

• NodeZoo a micro-service demo system
• Concorda a user system management solution.

I was assigned to the backend side for KarbonStream tablet project. The tablet was supposed to collect data from students in a very simple way. Student uses ordinary paper and pen and placing the paper on the tablet enables us to collect all required data in order to make possible to score correctly the student's test. The Java backend was receiving all data and was able to compute score/reports and all data required for teacher. Also it exposes API for both KarbonPad (the tablet) and for frontend.

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