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Constantinos Frangeskou

Computer Science Student · Web Developer · Startup Builder

Full-Stack Developer and Computer Science student at the University of Crete with hands-on experience building production web applications, Firebase-powered platforms, and client websites. Skilled in JavaScript, Node.js, PHP, SQL, and Firebase, with a strong foundation in data structures, object-oriented programming, and product execution. Open to roles in Software Engineering, Frontend Development, and Full-Stack Web Development.

Constantinos Frangeskou
Location: Heraklion, Greece
Address: Kazani 8, 71201 Heraklion, Greece

Experience

Founder & CEO - EduPay

edupay.grJan 2026 – Present
  • Founded EduPay, a web-based SaaS platform helping tutoring centers manage student payments, payment statuses, and parent communication.
  • Built the platform end-to-end on Firebase and modern web technologies; designed the UI/UX.
  • Validated the product with a real tutoring center; led branding, marketing, and customer discovery.

Teaching Assistant - Java Programming

University of CreteSep 2025 – Present
  • Support undergraduate Java Programming module through lab assistance and code reviews.
  • Provide debugging guidance and explain object-oriented programming and software design concepts.
  • Tools: Java, OOP, IntelliJ IDEA.

Website Developer

Minautor Racing Team (Formula Student)Sep 2025 – Present
  • Built and optimized Formula Student team website with mobile-first responsive design.
  • Implemented SEO improvements (meta tags, Open Graph, sitemap) and supported partner marketing.
  • Stack: HTML, CSS, Tailwind CSS, JavaScript, Firebase Hosting.

Volunteer - Get Hired Live

BizruptFeb 2026
  • Supported event operations and gained insight into recruitment workflows through live interview sessions.

Participant - Foundit Explore Entrepreneurship

BizruptMar 2026
  • Hands-on workshops in idea validation, startup operations, and collaborative problem solving.

Course Certificate - GenAI Fundamentals

100mentorsApr 2026
  • Foundational training in generative AI principles, responsible-use practices, and workflow-based applications.

Volunteer - Robotics Mentor

Robotex CyprusNov 2025
  • Supported logistics and workshops at Cyprus' largest robotics competition; mentored students in Arduino programming and hardware.

Recommendation Letters

Selected Projects

Freelancing & Product Projects See all projects at kfragkeskou.social

EduPay - Institute Payment Tracker

Founder & Developer2026
  • QR-based payment tracking, student database, and class scheduling with timetable integration.
  • Automated cloud backups and payment history reporting.
  • Stack: Firebase (Firestore, Auth, Hosting, Cloud Messaging), JavaScript.

Yese.gr - Interactive City Guide

Freelance Work2026
  • Mobile-first city guide with dynamic map interface and category filters.
  • Multi-language content, live updates, and admin panel for locations/events.
  • Stack: Firebase (Firestore, Auth, Hosting), JavaScript, Maps API.

PanExams Hub - AI Study Platform

Founder & Developer2026
  • AI-powered study tools (flashcards, quizzes, practice tests) over Cyprus exam papers.
  • Stripe premium subscriptions, secure Firebase Auth/Firestore rules, AdSense integration.
  • Stack: Firebase, Firestore, Stripe, JavaScript, AI APIs.

Kleos Noble Retreat

Freelance Work2026
  • Premium responsive site for a private retreat and events destination in Limassol.
  • Showcases corporate retreats, private events, and accommodation offerings.
  • Stack: HTML, CSS, JavaScript, Firebase Hosting.

Amerikanos Diner

Freelance Work2026
  • Cinematic, menu-first responsive site for an American-classics diner in Heraklion.
  • Photography-led layout, mobile-first design, and Firebase Hosting deployment.
  • Stack: HTML, CSS, JavaScript, Firebase Hosting.

CarNova AutoSales

Freelance Work2026
  • Responsive auto dealer site with URL-driven listings and touch-optimized galleries.
  • Secure admin panel, bilingual EL/EN, SEO/Open Graph metadata.
  • Stack: HTML, CSS, JavaScript, Firebase Firestore.

PicMeUp - Event Photo Sharing

Founder & Developer2025
  • Real-time photo sharing web app for weddings and events.
  • Instant uploads, shared online gallery, mobile-first design.
  • Stack: Firebase Storage, Realtime DB, JavaScript.
University Projects

University of Crete Payroll System

University Project2026
  • HR/payroll web app with employee, contracts, and department management.
  • Designed SQL schema, RESTful routes, automated payroll processing and reporting.
  • Stack: Node.js, Express, SQL, REST API, HTML/CSS/JS.
Grade: 100/100

Band & Event Management Platform

University Project2026
  • Web app connecting users and bands with profiles, messaging, and reviews.
  • Public/private events, request flows, admin tools, and DB scripts.
  • Stack: Node.js, SQL, HTML/CSS/JS.
Grade: 100/100

microTCP - Educational Transport Stack

University Project2026
  • TCP-like transport over UDP: handshake, CRC32 reliability, segmentation.
  • Implemented flow control and basic congestion control.
  • Stack: C, CMake, Networking, Systems Programming.
Grade: 100/100

Greek Electoral System Simulator

Data Structures Course2024
  • Voting, party results, and constituency management simulator.
  • Implemented hash tables, binary trees, and linked lists from scratch.
  • Stack: C, Data Structures, Algorithms.
Grade: 100/100

Lost Cities - Card Game

University Project2024
  • Two-player Java card game with full game logic and UI.
  • Applied object-oriented principles and design patterns.
  • Stack: Java, OOP, Design Patterns.
Grade: 113/100