Case studies

The work, with the numbers attached

Payment migrations moving $100M+ in recurring revenue, marketplaces built from an empty repository, and platforms still running years after launch.

Babbel

EdTech

Adyen → Stripe migration of Babbel's recurring billing — $100M+ in recurring revenue, zero downtime.

$100M+recurring revenue migrated

GigSocial

Social Commerce

Two-sided creator marketplace with escrow, wallets, and global payouts — zero to thousands of transactions monthly.

1000smonthly transactions

eifas Licensing GmbH

FinTech

Led the AngularJS → React modernization of a live accounting platform — 100% uptime throughout.

100%uptime during migration

Two-sided podcast advertising marketplace with Stripe Connect — shipped to production on schedule.

On timeproduction launch

Pissup Tours

Travel & Hospitality

Travel booking engine plus a group dashboard with shared wallets for splitting trip costs.

Multi-marketEuropean coverage

eSalon.rs

Beauty & Wellness

Real-time salon booking PWA I own and operate — multi-location scheduling, push reminders, business analytics.

PWAinstallable app

ArenaMaster.io

Gaming

My own WoW rankings platform, live since 2018 — rebuilt from a legacy Rails monolith to a modern Rails 8 + Next.js monorepo, without stopping it.

8 yrsin production

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