Pantelis Vratsalis

Currently, the website has suspended its functions. This website was online for three years (beginning 2011 till the end of 2013) for an online market research firm, but it has currently suspended its functions. It had a panel to recruit online members (around 4,000 members). I created this as a startup venture and developed both the front and back end (admin interface and user interface). I also handled marketing efforts (SEO and SEM). The web application was developed with PHP and CodeIgniter, and the data was stored using MySQL.

This project enables the creation of web polls and subsequent embedding of them on a website. It is also capable of obtaining the URL/link/QR code of the poll to share it and get responses. The project was developed with PHP and the Kohana framework and uses MySQL to store data.

Eduno.com is an online learning platform for salespeople based in Switzerland. It allows companies and individuals to educate themselves in sales-related subjects with online videos and interactive quizzes. It also has a recommendation engine for marketing purposes. I'm working on the development team of this ongoing project with six remote individual contractors. Development is in Python with the Pyramid framework. For storage, we used the ZODB NoSQL database.

I developed the collections feature for an online platform for freelance developers, displaying curated collections of freelancer services. It includes an administrative interface where services are grouped into collections. Freelancers can request to be included in one or more collections.

A famous quotes API available through the RapidAPI marketplace. Technologies used are Fastify (Node.js) for the back end with a PostgreSQL database, as well as Prometheus and Grafana for observability purposes.

AskBeat Easy Email NPS Surveys is a Shopify app for sending NPS surveys to store customers. The surveys are sent via email either manually (uploading a list of customers) or automatically every time an order is placed (integrating with Shopify's API). Technologies used include Ruby on Rails, Vue.js, and Bulma.

A native Android mobile app for vegetarian keto recipes. The app was built with Java (native app), and the API for fetching and updating data was built with Ruby on Rails and a PostgreSQL database on the back end.

Theatrinos.gr is a local theater performance search engine. Visitors can easily search among theaters and performances, using multiple criteria (e.g., genre, day of the week), to find performances that interest them.

Technologies used: Ruby on rails 5, jQuery and vanilla JavaScript, SQLite 3, Sass, and Webpack for asset bundling.

Integrations were made with Mailgun's API and with various affiliate APIs.