Based in Cyprus

Nicolas
Theodosiou

Full Stack Developer specializing in architecting scalable, high-performance digital products, from robust backend systems to polished user interfaces.

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00 — About

A developer who cares about every detail

I'm a Full Stack Developer focused on building scalable, reliable web applications end to end. I work across the stack — from backend architecture and APIs to clean, intuitive interfaces that perform well in real-world use.

At Jinius, I turn complex product and business requirements into stable, high-performance features, taking ownership from planning and architecture through delivery and iteration.

I care about writing clean, pragmatic code and building products that feel fast, reliable, and easy to use. I hold a BSc Computer Science from the University of Cyprus, graduating in the top 10 of my class.

Primary Expertise
Web Apps
E-Commerce
Mobile Applications
Currently

Full Stack Developer

Jinius by Bank of Cyprus

Education

BSc Computer Science

University of Cyprus · GPA 8.86/10

Location

Cyprus

Open to international opportunities

01 — Experience

Where I've done my work

Jinius by Bank of Cyprus

Full Stack Developer07/2025 — Present
Currently Active

TSYS

Software Engineer08/2024 — 07/2025
  • Developed and maintained database solutions using PL/SQL and Oracle Database.
  • Designed and implemented RESTful APIs with Spring Boot.
  • Leveraged CI/CD pipelines to automate deployment and testing.

Algolysis Ltd.

Software Developer11/2023 — 05/2024
  • Built a responsive web app for poultry farms using React and Next.js.
  • Created a charting package with Laravel for dynamic data visualisations.
  • Optimised expensive queries via InfluxQL, improving system-wide efficiency.

Bank of Cyprus

Software Developer Intern06/2023 — 08/2023
  • Developed screens for the 1bank quick loans section, enabling fully digital signing.
  • Built and integrated REST APIs with Spring Boot.
  • Collaborated with designers to modernise legacy iFrames.
02 — Projects

Things I've shipped

Padel Point Cy screenshot 1

Padel Point Cy

WordpressWoocommerceCloudflare
  • Lead developer and technical owner of the largest padel e-commerce store in Cyprus
  • Built and maintain a WordPress/WooCommerce multisite setup with stock synchronization
  • Manage hosting, DNS configuration, and infrastructure changes
  • Handled incident response and mitigation of DDoS attacks for stability
  • Manage Google Ads and Analytics conversion tracking for sales growth
Alfa Foods screenshot 1

Alfa Foods

Next.jsSEOGoogle Business
  • Website development for a leading frozen food manufacturer in Cyprus
  • Built with React and Next.js for high-performance and SEO
  • Manage and optimize Google Business Profile to drive local B2B and retail traffic
Personal Trainer screenshot 1

Personal Trainer

ReactNext.jsVercel
  • Custom design in Figma followed by React/Next.js development
  • Deployed on Vercel with integrated analytics and performance monitoring
  • SEO optimized for local personal training client acquisition
Shoppy screenshot 1

Shoppy

FlutterMariaDBTeam Leadership
  • Cross-platform grocery app surfacing supermarket discounts
  • Led a cross-functional team of 6 developers and designers
  • Selected as a SINN 2022 Finalist for innovation
03 — Education

Academic background

2020 — 2024

Bachelor's Degree in Computer Science

University of Cyprus

GPA: 8.86 / 10Distinction AwardTop 10 of Class
04 — Certifications

Professional recognition

Web Development Certificate

HTML5, CSS3, jQuery, JavaScript, WordPress and SEO.

SINN 2022 Finalist

Student Innovators Competition. Finalist with Shoppy groceries app.

IGCSE English — Grade A

University of Cambridge. Advanced proficiency in academic English.

05 — Skills

Engineering Expertise

Technical Stack

Ja
JavaScript
Re
React
Ne
Next.js
Fl
Flutter
Sa
Salesforce
Wo
Wordpress
Ja
Java
Sp
Spring Boot
La
Laravel
Py
Python
SQ
SQL
Or
Oracle DB
Po
Postman
Gi
Git
Fi
Figma
Ta
Tailwind CSS
HT
HTML5 & CSS3
An
Android Studio
Ja
JavaScript
Re
React
Ne
Next.js
Fl
Flutter
Sa
Salesforce
Wo
Wordpress
Ja
Java
Sp
Spring Boot
La
Laravel
Py
Python
SQ
SQL
Or
Oracle DB
Po
Postman
Gi
Git
Fi
Figma
Ta
Tailwind CSS
HT
HTML5 & CSS3
An
Android Studio
Ja
JavaScript
Re
React
Ne
Next.js
Fl
Flutter
Sa
Salesforce
Wo
Wordpress
Ja
Java
Sp
Spring Boot
La
Laravel
Py
Python
SQ
SQL
Or
Oracle DB
Po
Postman
Gi
Git
Fi
Figma
Ta
Tailwind CSS
HT
HTML5 & CSS3
An
Android Studio

Auto-scrolling • Swipe to explore

Core Principles

Precision

Deep attention to detail. I build clean systems that are easy to read and simple to maintain.

Performance

Speed isn't an afterthought. I optimize for the best possible user experience from the start.

Scalability

Future-proof architecture. Writing code that stays flexible as your project and user base grows.

Approach

Team Leadership
Problem Solving
Agile / Scrum
Creative Thinking
Organisational Planning
06 — Contact

Let's build
something together

I’m always open to new opportunities. Whether you have a question or just want to say hi, I’ll try my best to get back to you!