Currently building Theron•Heraklion, Greece


    Full-stack and mobile engineer with 3 years shipping production systems for government and enterprise clients, plus 8 years leading teams in the Hellenic Army.

    ./github./linkedin./contact
    LinkedIn GitHub
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    About

    Full-stack engineer, second career after 8 years leading in the Hellenic Army.

    I build production web and mobile products end to end — Next.js/React frontends, Django and Supabase backends — currently as a software engineer at UniSystems and freelance at Nerion, alongside my own app, Theron.

    Before software, I spent 8 years as an officer in the Hellenic Army, leading a 100+ person unit through logistics planning, risk management, and time-critical decisions — the same systems thinking I now apply to engineering.

    Languages: Greek (native), English (C2), Spanish (A1)

    Education: MSc Web & Smart Systems, Frederick University (2023–2025)

    antonis.config.ts
     1const antonis = {
     2  role: "Software Engineer",
     3  focus: ["full-stack", "mobile", "AI"],
     4  experience: {
     5    years: 3,
     6    military: 8
     7  },
     8  traits: {
     9    ownership: true,
    10    systemsThinking: true,
    11    vimUser: true // :wq
    12  },
    13  currentlyBuilding: [
    14    "Theron — AI nutrition & gym coach"
    15  ]
    16};

    Military Leadership

    8 years as an officer in the Hellenic Army, directing a 100+ person unit.

    MSc, Web & Smart Systems

    Frederick University — thesis on AI food recognition and weight estimation.

    PMP® Prep Completed

    Project Management Professional exam prep completed, certification exam pending.

    3 Years Shipping Production

    Software engineer at UniSystems, freelance at Nerion since June 2023.

    Founder, Theron

    Building an AI nutrition and gym-coaching app solo, end to end.

    AI-Assisted Workflow

    Use Claude Code and agentic tooling daily to move faster without cutting corners.

    Experience

    Where I've worked and what I've shipped.

    ~/projects/founder-&-developer● live
    Founder & Developer|Ongoing

    Theron — AI Nutrition & Gym Coach

    Solo-built AI nutrition and fitness app (iOS, Android, web) with a custom gym ERP and AI-driven insights — owning architecture, mobile/web development, and deployment end to end.

    React NativeNext.jsSupabase
    ~/projects/government-&-enterprise● live
    Government & Enterprise|Sep 2024 – Present

    Secure Web Applications @ UniSystems

    Building secure, high-availability web applications for government agencies, translating Figma designs into production UI and shipping a shared internal component library.

    Next.jsTypeScriptPostgreSQL
    ~/projects/modern-web-platforms● live
    Modern Web Platforms|Jun 2023 – Present

    Freelance Web Development @ Nerion

    Part-time freelance work across Django and Next.js/TypeScript codebases, focused on performance, SEO, and modernizing legacy systems.

    DjangoNext.jsTypeScriptSEO
    ~/projects/msc-thesis
    MSc Thesis|2025

    AI Food Recognition & Weight Estimation

    Multi-task deep learning model (ResNet50, PyTorch) for food classification and weight regression, trained on a custom-labeled dataset spanning 47 food categories.

    PyTorchComputer VisionKaggle

    // personal

    Personal & Freelance Projects

    Things I've built and shipped on my own.

    ~/projects/theron● live
    Founder & Solo Developer

    Theron — AI Nutrition & Gym Coach

    Live AI nutrition and fitness app on iOS and Android — AI food-scan macro tracking, workout logging, and a professional dashboard for gyms and trainers. Built solo end-to-end: React Native, Next.js, Supabase.

    React NativeNext.jsSupabaseTypeScriptAI/OpenAILive on App Store & Google Play
    Visit theronapp.com
    ~/projects/archon-properties● live
    Freelance — Full-Stack Development

    Archon Properties — Real Estate Agency Website

    Bilingual real estate website for a Heraklion, Crete agency — listings, 3D virtual tours, and service pages, built with Next.js for performance and SEO.

    Next.jsMultilingual (i18n)SEOClient Project
    Visit archonproperties.gr

    Tech Stack

    Tools I use to ship.

    ~/stack/frontend
    ReactNext.jsTypeScriptJavaScriptTailwind CSSSASS
    ~/stack/backend
    DjangoREST APIsPostgreSQLMySQL
    ~/stack/devops
    DockerGitJiraWebStormVS CodeBash
    ~/stack/ai_ml
    Kagglen8nAgentic WorkflowsComputer VisionPython
    ~/stack/other
    FirebaseGoogle Maps APIVimSEOSSR

    $ echo "still faster in Vim than VS Code"

    Let's talk

    Open to new opportunities and interesting problems.

    GitHub

    LinkedIn

    thanks for reading this far

    © 2026 Antonis Chalkias