Full-Stack Developer

ApostolosPeiniris

React · Kotlin/Compose · Node.js · Spring Boot · AI

Hi, I'm Apostolos — a Computer Science graduate from the University of Western Macedonia. I build full-stack web and mobile applications with React, Kotlin/Jetpack Compose, Node.js and Spring Boot, with a focus on integrating meaningful AI features rather than surface-level chat interfaces.

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Tech Stack

Technical Competencies

A focused set of technologies I use across web, mobile and backend work.

Selected Work

Featured Projects

Released · Android

Nufo

Nutrition scanner: photograph a plate and AI names every food with its grams and nutrition, or scan a barcode for Nutri-Score, NOVA and additives. Label photos fill in missing product data, diet warnings (keto, vegan, gluten-free) in plain language, in-app updates. Greek-first, free, no account.

⚡ AI meal recognition · Label OCR · USDA-verified calories
KotlinJetpack ComposeSwiftUIGemini AIVercel FunctionsUSDA FNDDSOpen Food FactsML Kit
View Live ↗ View Repository
Android App

Shft

Gym planner and workout tracker that turns scattered sessions into a repeatable system: build a plan, learn the lifts, log sets, review and track progress.

ReactCapacitorSupabaseGSAP
View Live ↗ View Repository
Live Production

Smart Grocery Hub (Καλαθάκι)

Free grocery price comparison: 71,000+ products from 8 Greek supermarket chains, collected daily by Puppeteer scrapers. Personalised home, cross-chain compare, Greek/Greeklish search and 500 recipes. Installable PWA, no account, no ads.

⚡ Daily scrapers · 71,000+ products · Works offline
React 19VitePWAVercel FunctionsMongoDB AtlasPuppeteer
View Live ↗
Android + API

RingVault

Free ringtones and alarms for Android: native Kotlin/Compose app on a Node.js/MongoDB API, with a weekly pipeline that ingests curated CC0/CC-BY sounds.

KotlinJetpack ComposeExoPlayerNode.jsExpressMongoDB
View Live ↗ View Repository
AI · PWA

MindFeed

Anti-doom-scroll PWA: a short daily feed of science-backed knowledge cards generated with Claude, with streaks and offline support.

React 19ViteNode.jsMongoDBClaude API
View Live ↗ View Repository
Creative Web Audio

Aurora Player

Music player with word-level synchronized karaoke lyrics, beat-reactive Web Audio visuals and YouTube integration.

React 19Web Audio APICanvasYouTube API
View Live ↗ View Repository
Java · Spring Boot

Zenith Strength System

Gym management platform: members, trainers, classes, CRM, payroll and point of sale. Spring Boot REST API on PostgreSQL with a React dashboard.

JavaSpring BootHibernatePostgreSQLReact
Private repository

Languages

Language Proficiency

Greek
Native Speaker
English
Proficient User
C2 — NOCN Distinction
German
Basic User
A1 — State Cert.

Academic History

Education & History

2020 → 2026

B.Sc. Computer Science (Informatics)

University of Western Macedonia — Kastoria
50/50 courses · 270 ECTS · Final Grade 6.61/10 — Very Good
Degree Awarded: June 2026 Oath Ceremony: Winter 2026–2027
2017 → 2020

General High School Diploma

1st General Lyceum of Preveza — STEM
Mathematics 18.5 · Computer Science 19.5 · English 19.5
19.1/20 — Excellent
Nov 2025

Military Service — Completed

Hellenic Army — 625 M/P Unit, Ioannina
No pending military obligations
Fully Discharged

Professional Experience

Work & Experience

Summer Seasons 2021–2023

Waiter

Iliovasilema — Alonaki Beach, Pantokratoras, Preveza
Front-of-house service at a seaside restaurant during university summer breaks
Seasonal
Summer Season 2024

Bar Assistant

Alila Tales & Spirits — Preveza
Supported bar operations during university summer breaks
Seasonal
4–5 Months 2024-2025

Waiter

Vento Gelateria Pasticceria — Preveza
Front-of-house service at a gelateria and pastry shop during university studies
Seasonal

Qualifications

Certifications & Qualifications

Education
General High School Diploma
1st General High School of Preveza
June 2020 · 19.1/20
Language
English C2 — NOCN Level 3
NOCN Group (Ofqual)
January 2022 · Distinction
Language
German A1 Certificate
Ministry of Education, Greece
August 2017 · A1
Official
Military Service Certificate
Hellenic Army, Epirus
November 2025 · Completed
Certification
Java Basic Certificate
HackerRank
June 2026 · Basic
Education
University Graduation Certificate
University of Western Macedonia — Kastoria
July 2026 · 6.61/10

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Let's Connect

Open to Work
Email
apostolos.peiniris@gmail.com
Phone
+30 694 788 9505
Location
Preveza, Greece 48100
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