John Roinos
AeroLeads people directory · profile

John Roinos Email & Phone Number

Technical Lead at Hack The Box at Hack The Box
Location: Álimos, Attiki, Greece 9 work roles 1 school
LinkedIn matched
✓ Verified May 2026 3 data sources Profile completeness 100%

Contact Signals

LinkedIn Profile matched
3 free lookups remaining · No credit card
Current company
Hack The Box
Role
Technical Lead at Hack The Box
Location
Álimos, Attiki, Greece
Company size
406 employees

Who is John Roinos? Overview

A concise factual answer block for searchers comparing this professional profile.

Quick answer

John Roinos is listed as Technical Lead at Hack The Box at Hack The Box, a company with 406 employees, based in Álimos, Attiki, Greece. AeroLeads shows a matched LinkedIn profile for John Roinos.

John Roinos previously worked as Technical Lead at Hack The Box and Senior Software Engineer at Hack The Box. John Roinos holds Computer Systems Networking And Telecommunications from University Of Piraeus.

Company email context

Email format at Hack The Box

This section adds company-level context without repeating John Roinos's masked contact details.

Hack The Box

Review company-level records connected to John Roinos before choosing the right outreach path.

View email format View company profile Management contacts
Profile bio

About John Roinos

I am a full stack Web Developer that specializes in PHP, PHP Frameworks, JavaScript, jQuery & Troubleshooting with the aim of delivering reliable and secure web applications and integrations to enterprise customers. With over several years of experience in IT industry, I am always looking for challenging projects to help me develop my skills and learn new technologies. I'm very enthusiastic, eager to constantly expand my knowledge, be challenged and given the opportunity to share my knowledge where I can improve and contribute.

Listed skills include Windows Server, System Administration, Active Directory, Network Administration, and 19 others.

Current workplace

John Roinos's current company

Company context helps verify the profile and gives searchers a useful next step.

Hack The Box
Hack The Box
Technical Lead at Hack The Box
folkestone, kent, united kingdom
Website
hackthebox.eu
Employees
406
AeroLeads page
Company profile
View company profile Email format
9 roles · 15 years

John Roinos work experience

A career timeline built from the work history available for this profile.

Owner / Web Development Manager

Leadersys

Greece

Mar 2014 - Jan 2017

Web Developer

Freelance
  • Contacting customers - analysing needs and goals
  • Web application design and development.
  • Website development and support.
  • Custom Module development for CMS.
2012 - 2014 ~2 yrs

System Administrator

Pansystems S.A.

I. Maintenance and performance tuning of Client’s Servers(Windows 2003,2008, ISA Server, Exchange Server)II. Administration of Domain Controllers depending on client’s requirements (Active Directory, Userrights, Group Policies etc.)III. Administration of client’s ISA and Exchange Server.IV. Troubleshooting-Helpdesk.V. Intranet ServicesVI. Educating.

2011 - 2012 ~1 yr

System Administrator

Pansystems S.A.

I. Maintenance and performance tuning of Client’s Servers(Windows 2003,2008, ISA Server, Exchange Server)II. Administration of Domain Controllers depending on client’s requirements (Active Directory, Userrights, Group Policies etc.)III. Administration of client’s ISA and Exchange Server.IV. Troubleshooting-Helpdesk.V. Intranet ServicesVI. Educating.

Jan 2006 - Oct 2008

I.T. Assistant

Athens 2004

I. H/W installation and network functionalityII. Troubleshoot and HelpDesk

Sep 2003 - Oct 2004
Team & coworkers

Colleagues at Hack The Box

Other employees you can reach at hackthebox.eu. View company contacts for 406 employees →

MT Mohammed Taamart Mohammed Taamart Colleague at Hack The BoxParla, Community Of Madrid, Spain, Spain View → NC Nancy Casas Muñoz Nancy Casas Muñoz Colleague at Hack The BoxNew York, New York, United States, United States View → AA Ali Ahmida Al Sharif Ali Ahmida Al Sharif Colleague at Hack The BoxWaddan, District Of Al-Jufra, Libya, Libya View → AK Aung Kyaw Phyo Aung Kyaw Phyo Colleague at Hack The BoxMyanmar, Myanmar View → MB Mark Bryan Mark Bryan Colleague at Hack The BoxPanamá, Panama, Panama View → EC Erick Cedeno Erick Cedeno Colleague at Hack The BoxManagua, Nicaragua, Nicaragua View → NJ Nihil Jayaprakash Nihil Jayaprakash Colleague at Hack The BoxKerala, India, India View → JM Junin Minecraft Gamer Junin Minecraft Gamer Colleague at Hack The BoxRussia, Russian Federation View → DA Divanshu Arora Divanshu Arora Colleague at Hack The BoxChandigarh, India, India View → RK Reju Kole Reju Kole Colleague at Hack The BoxKolkata, West Bengal, India, India View →
1 education record

John Roinos education

FAQ

Frequently asked questions about John Roinos

Quick answers generated from the profile data available on this page.

What company does John Roinos work for?

John Roinos works for Hack The Box.

What is John Roinos's role at Hack The Box?

John Roinos is listed as Technical Lead at Hack The Box at Hack The Box.

Where is John Roinos based?

John Roinos is based in Álimos, Attiki, Greece while working with Hack The Box.

What companies has John Roinos worked for?

John Roinos has worked for Hack The Box, Creative People Hellas, Leadersys, Freelance, and Pansystems S.A..

Who are John Roinos's colleagues at Hack The Box?

John Roinos's colleagues at Hack The Box include Mohammed Taamart, Nancy Casas Muñoz, Ali Ahmida Al Sharif, Aung Kyaw Phyo, and Mark Bryan.

How can I contact John Roinos?

You can use AeroLeads to view verified contact signals for John Roinos at Hack The Box, including work email, phone, and LinkedIn data when available.

What schools did John Roinos attend?

John Roinos holds Computer Systems Networking And Telecommunications from University Of Piraeus.

What skills is John Roinos known for?

John Roinos is listed with skills including Windows Server, System Administration, Active Directory, Network Administration, Group Policy, Php, Html 5, and Troubleshooting.

Find 750M verified contacts

Search by job title, company, industry, location, and seniority. Export verified B2B contact data when you need it.