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Lefteris Giannaros

@lefterisgiannaros

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Full-stack developer building EmuSphere, a native game launcher, with Electron, React, TypeScript, and Prisma.

Greece

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At Dizzy Agency, I built custom WordPress and WooCommerce plugins in PHP and integrated REST APIs with third-party services and internal tools.

At VALUE Agency, I built a custom Stripe payment plugin for a real estate website and implemented Google Tag Manager event tracking. I also created Google Apps Script tools to bring WooCommerce data into Sheets and send contract expiry notifications.

At Parkaround, I built a coupon system for a high-traffic SaaS product using Knockout.js and Vue.js, and added shareable deep links for modals.

I'm currently developing EmuSphere, a native desktop retro game launcher built with Electron, React, TypeScript, Prisma, and SQLite. As its sole developer, I’m responsible for its architecture, backend, and frontend; its ROM scanner covers 63+ platforms and supports one-click launching via RetroArch CLI.

Experience

Work history, roles, and key accomplishments

Current

Freelance Web Developer

Current

Self-employed

Mar 2023 - Present (3 years 7 months)

Built and maintained WordPress/WooCommerce stores, developing custom plugins and theme extensions using PHP, JavaScript, and CSS.

WordPress WooCommerce PHP JavaScript CSS

Frontend Developer

Dizzy Agency

Mar 2025 - Jul 2026 (1 year 4 months)

Built custom WordPress/WooCommerce plugins in PHP and integrated REST APIs with third-party services including GTM, Stape.io, and Google Sheets.

WordPress WooCommerce PHP REST APIs Google Tag Manager Stape.Io Google Apps Script

Frontend Developer

VALUE Agency

Sep 2023 - Mar 2025 (1 year 6 months)

Developed a custom Stripe payment plugin for a WordPress real estate site and implemented GTM event tracking via WooCommerce hooks. Built Google Apps Script tools for data integration and automated notifications.

PHP WordPress WooCommerce Stripe Google Tag Manager Google Apps Script JavaScript

Junior Front-End Developer

Parkaround

Sep 2022 - Jun 2023 (9 months)

Built a full coupon system with dashboard, in-app flow, and modal UI using Knockout.js and Vue.js. Implemented URL hash-based navigation for shareable deep links.

KnockoutJS Vue.Js JavaScript HTML CSS

IT Consultant

Epilisis Alfa Mihanografik

Sep 2020 - Jan 2022 (1 year 4 months)

Delivered tailored ERP solutions for 80+ SMEs and led a team of 5 consultants for the Epsilon Smart Cloud ERP Suite. Onboarded and trained clients on cloud software adoption.

ERP Epsilon Smart Cloud Software Team Leadership Customer Training