Nicolas Reszka

Fintech SaaS - procurement, accounting, treasury. • Implemented design system and shipped Vue.js dashboards from Figma into production • Solved performance for data-heavy financial views (caching, hydration, virtualization) so interfaces stay usable with thousands of rows • 3+ years continuous product delivery with founders who need reliability Stack: Vue.js, modern front-end architecture, performance-focused UI

Rebuilt premium gym websites that weren’t converting. Results after launch: • Website sign-ups went from negligible to ~half of new memberships • Lead-to-contract conversion 5% → 30% (500% relative increase) • Direct online subscriptions enabled for the first time Later: server-side analytics when GA / Meta Pixel data was incomplete or blocked.

Web dashboard for a mobile-money product (Central & West Africa) Multi-layer economy views (agents, dealers, operators), transaction analytics, real-time operational data. • Built and iterated the web platform alongside mobile and API teams • Real-time graphs, scoped leaderboards, geohashed activity views, KYC flows • Hard production constraints: intermittent connectivity on mobile side, multi-role data access, high operational stakes Stack: web app architecture with real-time data; careful data modeling for multi-sided roles

Web development consulting

Creation of a custom stripe checkout inside a web view to avoid 30% iOS Apple Tax. The company could reinvest that into what they do best: helping the elderly, instead of giving that money to a multi billion $ corporation

This one spans two acts. Act one (2020): The director was editing the school's website by hand in Microsoft Frontpage. Every course update, every event announcement... he had to modify raw HTML and push it himself. I rebuilt the site properly: responsive, clean, and powered by a CMS so he could create pages, courses, and events by filling in a form instead of editing HTML manually. It was a massive step up. It worked well for years. Act two (2026): That CMS had a ceiling. When the school needed a dedicated page for their annual festival with its own layout, its own content structure; it couldn't accommodate it. I came back and replaced it with a fully custom CMS, built from the ground up for how they actually work. - The festival page went live in under an hour. - They now have genuine autonomy: any page, any structure, no roadblocks.

An art dealer selling antique paintings. Before: entirely on eBay. Three months after launching the online shop: 10x increase in online sales compared to eBay performance. Moved a merchant from marketplace dependency to their own shop. 10x sales in 3 months. Tags : CMS / Online Shop / Design / Web development