Stavros is available for hire

Stavros Souvatzis

Verified Expert in Engineering

Software Developer

Athens, Central Athens, Greece

Toptal member since March 4, 2020

Expertise

Ruby Ruby on Rails Algorithms PHP JavaScript Linux MySQL SQL jQuery PostgreSQL REST API Redux React.js MongoDB Laravel

Bio

Stavros has been actively working as a web developer and assistant systems administrator since 2009. Quite fluent with Ruby on Rails and other scripting server-side frameworks, he has written several variably scoped full-stack applications and APIs with quite demanding business logic. Stavros has been recruited, with good results, for complex, challenging problems that demanded expert skills, deep understanding, and good adaptation.

Portfolio

Freelance

React, PHP, Ruby on Rails (RoR), APIs, REST APIs, API Integration

Experience

PHP - 13 years
Zimbra - 11 years
Ruby on Rails API - 10 years
Ruby on Rails (RoR) - 10 years
React - 3 years
Redux - 3 years
MongoDB - 3 years
Material UI - 2 years

Availability

Part-time

Preferred Environment

GitHub, Ruby on Rails (RoR), Ruby, Linux, Visual Studio Code (VS Code)

The most amazing...

...project I've created is a platform for language skill testing for which I wrote API, SPA, algorithm, and tools, setting up the server with various side tasks.

Work Experience

Web Developer

2012 - PRESENT

Freelance

Supported multiple WP projects requiring advanced back-end functionality.
Created functionality for loyalty and discount cards for a high-profile organization in tourism.
Constructed private SPAs for XML feed analysis and manipulation (import, online and in-line edit, export). Created a meta-tool for batch editing feed entries.
Implemented a framework from scratch for language skill placement tests, using advanced algorithms and very rich parameterization, currently consisting of an API and multiple SPAs.
Created multiple API servers and server connectors of various flavors.

Technologies: React, PHP, Ruby on Rails (RoR), APIs, REST APIs, API Integration

Experience

InstaLevel

https://instalevel.org/

An online testing environment to assess language skills. Provided as B2C or B2B, with extensive business logic, advanced algorithms, advanced React, Mongo reports, and variable graphs with the Nivo library. All API responses were calculated based on previous answers, making this tool a highly adaptive language skills assessment platform.

Education

2001 - 2005

Bachelor's Degree in Computer Science

University of Pireaus - Pireaus, Greece

Skills

Libraries/APIs

Ruby on Rails API, React, Mongoid, jQuery, Prawn, Devise, REST APIs

Tools

Zimbra, GitHub, Atom

Languages

Ruby, PHP, JavaScript, SQL

Frameworks

Ruby on Rails (RoR), Material UI, Redux, Laravel, Nova

Platforms

Linux, Heroku, Visual Studio Code (VS Code)

Storage

PostgreSQL, MySQL, MongoDB, SQLite

Other

APIs, Authorization, Nivo, Algorithms, Document Parsing, API Integration, Computer Science, Graphs

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