Istvan Rac's Work | ContraWork by Istvan Rac

Istvan Rac

Senior System Architect & Growth Engineer | US-Based LLC

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Belgrade, Serbia

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Belgrade, Serbia

Cover image for Automated Media Optimization Engine: Server-Side

Automated Media Optimization Engine: Server-Side Image Cleanup Logic A proactive backend utility designed to maintain server health by automatically purging orphaned media files. Unlike standard WordPress behavior, this custom engine tracks gallery meta changes in real-time and permanently deletes unlinked attachments from the server, preventing storage bloat and ensuring peak performance for high-traffic, user-driven platforms.

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Cover image for Mobile-First Full-Screen Modal Engine: Premium

Mobile-First Full-Screen Modal Engine: Premium UX for E-commerce Filtering A custom-engineered mobile interaction layer that replaces clunky default dropdowns with a high-performance, full-screen modal system. Designed for enterprise-level search pages, it features smart z-index management, sticky headers with branding, and native-feeling animations, drastically improving conversion rates by providing a seamless, app-like filtering experience on mobile and tablet devices.

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Cover image for High-Deliverability Email Engine: Custom SendGrid

High-Deliverability Email Engine: Custom SendGrid & AWS SES Integration A robust backend solution designed to bypass standard server limitations by integrating SendGrid and AWS SES for mission-critical notifications. Features automatic service switching, daily quota monitoring, and a custom admin interface for real-time deliverability management, ensuring 100% reach for enterprise-level platforms.

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Cover image for Enterprise-Grade Featured Ads Battle System:

Enterprise-Grade Featured Ads Battle System: Custom SQL Priority Engine A high-performance backend architecture designed to manage complex ad prioritization through optimized SQL queries and real-time frontend logic. This system grants platform owners granular control over monetization, ensuring that featured listings maintain absolute priority without compromising database scalability or site speed.

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