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Panagiotis Evangeliou

Software Engineer

  • EMAIL : moc.oohay@egnave_nap
  • Barcelona, Spain

Portfolio

MY WORK

Twitter Sentiment Analysis

  • Course Project of Data Mining Course.
  • Implemented in Python using libraries like Pandas and Scikit-learn.
  • Performed the classification using 2 different classifiers: Support Vector Machines (SVM) and K-Nearest Neighbors (KNN).
  • Performed the vectorization using 3 different techniques: Bag-of-Words (BOW), Term Frequency — Inverse Document Frequency (TF-IDF) and Word Embeddings.

Python

Pandas

Sklearn

MiniJava Compiler

  • Course Project of Compilers Course.
  • Implemented in Java using tools like JavaCC and JTB.
  • Also used the visitor design pattern for Static Checking (Semantic Analysis) as well as for Generating Intermediate Code used by the LLVM compiler project.

Java

JavaCC

JTB

Data Analysis and Clustering

  • Course project for the Data Mining course of the Departement of Informatics of the National and Kapodistrian University.
  • In this project the task was to perform data analysis as well as clustering with the use of k means for the crime data of the city of Boston.

Python

Pandas

Human Computer Interaction Course Project

  • Redesign a part of a website so as to make it more user-friendly.
  • Course project of Human Computer Interaction Course.
  • Full stack web development with PHP, HTML, CSS (Bootstrap) and JavaScript.
  • Redesign a part of Eudoxus site, which is used by students to get their university books, so as to make it more more user-friendly.
  • It is given emphasis on UI rather than backend.

PHP

HTML

CSS (Bootstrap)

JavaScript

Parallel Matrix Convolution

  • Parallel Matrix Convolution in C using MPI and openMP
  • Course Project of Parallel Systems Course.

C

MPI

openMP

Mini search engine implementation

  • Course Project of System Programming Course.
  • Implemented in C++ creating Data Structures like Trie and Posting Lists for representation of Inverted Index.
  • Also used Polymorphism so as to minimize the memory usage for storing each word into Trie .

C++

Data Structures

B+ Tree Index implementation in C

  • Course Project of Database Systems Implementation Course.
  • Implementation of all search and insertion algorithms for B+ trees (including node splitting during insertion of data) in C.

C

Radix Hash Join

  • SIGMOD 2018 Programming Contest Task
  • Course project of Software Development for Information Systems Course.

C++

My personal responsive site!

  • Based on this template.
  • Made many changes and added this carousel with my projects.
  • It is given emphasis on responsiveness.

HTML

CSS

JavaScript

About me

PROFESSIONAL PATH

Traveling is my biggest love, along with Computer Science, so meeting new cultures and people and learning new languages is the best for me. I am an open-minded person and I feel like a citizen of the world.

The combination of my solid background in Software Engineering and my fast adaptability makes me the suitable candidate as I can learn any new technology quickly and be productive from an early time in any kind of environment. I can work both in a team and independently and I am not afraid of taking responsibility.

Technical Skills

I'M GOOD AT

Programming Languages

Java

Python

PHP

C

C++

Matlab

Bash

Web Development

React

Spring

Javascript

Typescript

Node.js

Django

HTML5

CSS3

Bootstrap

Hibernate

JPA

MVC

REST

JavaEE

Apache2

TomCat

Material-UI

Databases

SQL

NoSQL

Data Science

Pandas

Sklearn

Jupyter
Notebooks

NumPy

Matplotlib

Seaborn

Version Control

Git

Github

GitLab

Cloud

Google Cloud Platform (GCP)

OS

Linux

Ubuntu

WSL2

MAC OS

Windows

Windows
Server

Red Hat
Linux

Other

MPI

Oracle SQL
Developer

PhpStorm

PyCharm

WebStorm

IBM Data
Studio

LaTeX

Word

Excel

PowerPoint

Work Experience

PREVIOUS JOBS

Data Engineer

STALICLA
February 2024 - Current
Barcelona, Spain

Building custom ETL pipeline from start to end:

  • Designing the Electronic Data Capture system (Zelta) for the collection of the clinical data. Performing automated quality checks and query management to ensure data validity
  • Extracting the data from the ongoing study (EDC) or from older studies. Transforming them and creating useful reports and plots for the scientific team.
  • Loading the data into a centralized PostgreSQL database. Reviewing, maintaining and extending the DB schema based on the business needs of the scientific team and the shareholders. Also, Supporting the creation of the backend API for the Web App displaying the data
  • Supervising and mentoring an intern and a junior colleague.

Technologies I used:

  • Python, Pandas, psycopg, PostgreSQL, AWS, Bash, Docker, Kubernetes, Zelta, GitLab

Technical Solutions Representative for Google Cloud Platform

Webhelp
June 2023 - February 2024
Barcelona, Spain

As a Technical Solutions Representative for Google Cloud Platform, I was a key asset of the official support team of Google providing critical services to several customers (such as Spotify, Snapchat, Booking, BBVA, Samsung, Cisco, etc) related to Databases, PaaS and SaaS GCP products.

Tasks:

  • Troubleshooting issues in GCP platform, on-prem, multicloud or third-party environments.
  • Interaction with the customers.

Full Stack Web Developer

European Organization for Nuclear Research (CERN)
March 2021 - April 2022
Geneva, Switzerland

Full Stack Web Developer in the Web Team of International Relations Department at CERN, the team responsible for managing the core website of CERN and a set of official CERN websites.

Technologies I used:

  • Drupal, PHP, HTML, CSS, Bootstrap, JavaScript, Python, Django, Postgres, ReactJS, Openshift

My role:

  • Migration of web sites from Drupal 8 to Drupal 9. Maintenance of Drupal CERN Theme and modules. Maintenance of home website of CERN.
  • Organising and supporting the Drupal Community of CERN by providing assistance and consulting regarding the maintenance and expansion of their website. Also making guides and documentation so as to help the website owners and editors.
  • Maintaining and expanding myCERN web application using Django and Postgres (backend), ReactJS (frontend), Openshift (hosting) and Gitlab CI (deployment).
  • Check my recommendation letter.

Full Stack Software Engineer

Agile Actors
July 2020 - January 2021
Athens, Greece

Working for ICAP Group (outsourcing contractor of Agile Actors).

The project I worked on:

  • Creating CRUD web application for a Business Registry.

Technologies I used:

  • Java, React, Spring, Hibernate, JPA, MVC, REST, IBM db2, IBM Data Studio, Apache2, TomCat, HTML5, CSS3, Bootstrap, Material-UI

My role:

  • Full stack web development for the whole application using the MVC pattern.
  • Design and implementation of the database (designed the entity relationship diagram (ERD) using Lucidchart and created the IBM db2 database on a Windows Server VM).
  • Building RESTful Web Service Application using Java and Spring Boot and deploy it into TomCat server on a linux Red Hat vm.
  • Creating forms and tables (react-table) in React for viewing/editing/creating operations for all the entities in the database, using Bootstrap and Material-UI libraries.
  • Implementing export to pdf and csv functionalities for information about businesses and financial reports, using open source libraries in React like react-csv and jspdf.

Computer and Network Specialist

Hellenic Army Academy (Evelpidon)
Military Service: Research - Informatics Corps
November 2019 - June 2020
Vari, Athens, Greece

During my mandatory military service period I served at the Research - Informatics Corps and I worked as Computer and Network Specialist at the Research and Informatics Department of the Hellenic Army Academy.

  • Support and maintenance of Academy's computers at hardware and software level (it is worth mentioning that the Hellenic Army Academy has the second largest network within the Greek Army, which consists of 2 MAN networks with over 1200 users and 2000 machines).
  • Development and support of the Academy's new webpage (www.sse.army.gr), using Drupal CMS.
  • Installation and maintenance of wired and wireless networks of the Academy's campus (UTP/STP cabling, optical fibers, Cisco Aironet/Ubiquiti Unifi wireless couplings).
  • Administration and support of network security and communications systems (pfSense Firewall, Zimbra Mail Server, IPSwitch Whatsup GOLD NMS, Moodle Learning Platform).
  • Technical support for conferences and events.
  • Creation of User Manuals.
  • Check my recommendation letter.

Junior Developer / Consultant

Cognity S.A.
July 2018 - January 2019
Athens, Greece

The projects I worked on:

  • Creating responsive version of existing eCommerce website developed using Oracle eCommerce ATG platform.
  • Using Elasticsearch for optimizing product search engine and creating back office tool for existing eCommerce website developed using Oracle eCommerce ATG platform.

Technologies I used:

  • Java, Oracle ATG, Html, CSS, JavaScript, JSP, Git, Bash Script, SQL, SQL Developer, Elasticsearch

My role:

  • Testing / Fixing Bugs in either HTML/CSS or Java during UAT phase.
  • Customer support for either existing desktop site or responsive site during UAT phase.
  • Creating whole pages (both front-end and back-end) for back office tool like Profile Search, Order Details, Product Search etc.
  • Developing in Java using Elasticsearch.

Education

ACADEMIC CAREER

Bachelor in Computer Science

National and Kapodistrian University of Athens
Department of Informatics and Telecommunications

Specializations:

  • Software
  • Data and Knowledge Management

GPA: 8/10

"I am

not an Athenian or a Greek, but a citizen of the world.
-Socrates

Volunteering

PROJECTS I HAVE TAKEN PART IN

Youth Exchange Participant - Erasmus+

Coconutwork
September 2022, Flores, Azores, Portugal

I took part in a Youth Exchange Erasmus+ project with young people from Luxembourg, Portugal, Romania, Italy, Greece, Sweden, Serbia and Slovakia.

Project Title: Enviropreneurs Generation

Subject: Sustainable development using the environment as a resource for youth enterprises in rural areas

Content:

  • The project relates the idea for sustainable development and the possibility of sustainability using the environment as a resource for youth enterprises in rural areas. It promotes ideas for young people to establish environment-based enterprises in local communities such as eco-tourism; bio-agriculture and community development projects.

Learning Methods:

  • Discussion tables, workshops, debates, role-plays, simulations, presentations, teamwork, social games, outdoor activities.

Project Organized by: coconutwork

Youth Exchange Participant - Erasmus+

Greek Youth Mobility
August 2022, Curteni, Romania

I took part in a Youth Exchange Erasmus+ project with young people from Greece, Portugal, Romania and Spain.

Project Title: Art of Social Innovators

Subject: Circular Economy and Social Entrepreneurship

Content:

  • Learn about useful tools in social entrepreneurship (Persona Canvas, Value proposition canvas).
  • Understand how the circularity of products can be implemented in real life.

Learning Methods:

  • Discussion tables, workshops, debates, role-plays, simulations, presentations, teamwork, social games, outdoor activities.

Project Organized by: Young Europe Society

Youth Exchange Participant - Erasmus+

Environment Online - Greece (EN.O. Greece)
July 2022, Žižice, Czechia

I took part in a Youth Exchange Erasmus+ project with 26 young people from Greece, Netherlands and Spain.

Project Title: Authenticity

Subject: Authenticity

Content:

  • To support young people to be authentic.
  • To improve the employability of the participants.
  • To increase awareness about discrimination of people with fewer opportunities and promote solidarity and inclusion.

Learning Methods:

  • Discussion tables, workshops, debates, role-plays, simulations, presentations, teamwork, social games, outdoor activities.

Project Organized by: ICM Slaný

Youth Exchange Participant - Erasmus+

Youthfully Yours GR
July 2019, Murzasichle, Poland

I took part in a Youth Exchange Erasmus+ project with 37 young people from Bulgaria, Greece, Hungary, Lithuania, Poland, Romania and Slovak Republic.

Project Title: Youth Beyond Limits

Subject: Youth Unemployment and Entrepreneurship

Content:

  • The problem of high unemployment rate amoung young people living in UE.
  • Development of entrepreneurial and employability skills by participants of the youth exchange.

Learning Methods:

  • Discussion tables, workshops, debates, role-plays, simulations, presentations, teamwork, social games, outdoor activities.

Project Organized by: Stowarzyszenie "Grupa Działania"

Youth Exchange Participant - Erasmus+

Youth Center of Epirus
February 2019, Ocna Șugatag, Romania

I took part in a Youth Exchange Erasmus+ project with 30 young people from France, Greece, Italy, Lithuania, Romania and Spain.

Project Title: Like to Vote

Subject: The May 2019 elections

Content:

  • Increasing the number of young people who were informed about the importance of participating in the May 2019 elections.

Learning Methods:

  • Discussion tables, workshops, debates, role-plays, simulations, presentations, teamwork, social games, outdoor activities.

Project Organized by: Asociaţia Szmisz