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Ioannis SiampaliasIS

Ioannis Siampalias

Senior Frontend Developer · React & Vue.js

€400/day
Athens, GR
3-7 years

Average response time: 1 hour

About Ioannis

Senior Frontend Developer with 5+ years of experience building real-world web products across travel-tech, e-commerce, gaming, and port operations.

My core stack is React and Vue.js. I work across the full ecosystem: React Native, Node.js, TypeScript, Redux, Pinia, Tailwind CSS, and more. I've contributed to everything from high-traffic betting platforms (Betano) and enterprise retail tooling (Kotsovolos) to mobile ferry apps and port revenue systems.

I also lecture part-time at Metropolitan College. 5+ years of translating technical concepts for non-technical audiences makes me a clearer communicator and a patient collaborator.

📌
  • Greek

    Native or bilingual

  • English

    Native or bilingual

  • Italian

    Conversational

Can work on-site
Athens (up to 50km)

Experience

  • LIKNOSS
    Senior Frontend Developer
    June 2025 - Today (1 year)
    Athens, Greece
    › React Native mobile ferry ticketing app
    › Vue 2 → Vue 3 migration with Node.js backend
    › Acropolis ticketing: Handlebars, Node.js & Puppeteer for PDF generation
    › Port ops platform: revenue control, ticketing & vessel planning (Vue 3, TS, Pinia, Vue Query, Tailwind)
    Node.js React.js VueJS Typescript React Native
  • Kaizen
    Frontend Developer
    March 2023 - June 2025 (2 years and 3 months)
    Athens, Greece
    Gaming
    • · Stoiximan / Betano
    › Loyalty rewards mechanism & dashboard — millions of active users
    › General rewards dashboard across the platform
    › Stack: Vue 3, TypeScript, Pinia, Tailwind CSS
    Typescript VueJS React.js Node.js JavaScript
  • Dixons Kotsovolos
    Frontend Developer → Team Lead
    April 2021 - March 2023 (1 year and 11 months)
    • · via Agile Actors
    › K-Retail: enterprise app for nationwide store employees (inventory, orders, CRM)
    › Progressed to Team Lead — code quality, code reviews, stakeholder liaison
    › In-house: NextDot social platform & JS/CSS onboarding curriculum
    › Stack: React, Redux, RxJS, Material UI
    React.js

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Education

  • MSc
    Metropolitan College
    2020
    MSc
  • MSc Educational
    Neapolis University
    2016
    MSc Educational

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