MUSTAFA
ZAHID
EFE

As Altivo LLC, we build high-quality web and mobile software tailored to our clients' needs. With a strong focus on performance, scalability, and user experience, we deliver solutions that not only meet expectations but often exceed them.

HR & talent management platform bringing companies and young talents together. Responsible for all backend architecture, deployments, and team leadership.

• Converted platform from pay-as-you-go to SaaS — built auto-charging subscription system with monthly/yearly billing, upgrade/downgrade, and discount coupons
• Built a powerful survey system with multiple question types, preset choices, inputs, and voter limitations
• Developed event ticketing system — companies create paid events, users buy tickets (Vue.js + Symfony)
• Built REST API feeding all mobile applications with full feature parity to the web interface
• Created "Flow" — candidate pipeline system to filter applicants and route them through custom hiring steps
• Mentoring junior developers, reviewing PRs, planning new features' technical architecture

Digital agency co-founded with a friend. I was the wildcard — built everything from iOS apps to WordPress plugins to full Symfony backends for various clients.

• React Native cross-platform mobile application
• iOS application written in Swift and Android application in Java
• Multiple Symfony backend systems for client projects
• WordPress websites, custom plugins, and custom themes
• ReactJS web applications

WordPress speed optimization plugin available on WordPress.org. Rewrote the plugin from scratch and added extensive performance features.

• Complete rewrite of the plugin from scratch with a modern architecture
• Disk caching, OpenLiteSpeed caching, and database optimization features
• Cloudflare API integration — purge CDN cache directly from WordPress dashboard
• Dozens of other frontend and server-side performance features

Platform helping companies measure and improve their circular performance. Developed the user dashboard interface.

• Integrated headless CMS (Storyblok) — making all UI texts editable by non-engineers
• Re-structured the entire user interface to support multiple languages (i18n)
• Bug fixes and UX improvements across the dashboard

Trivia quiz game with 400K+ downloads. Reached #1 on Google Play Store Trends for a week. Built with React Native + Symfony backend handling 10K+ concurrent users.

• 400K+ downloads — #1 on Google Play Store Trends for a week
• React Native + Redux (Thunk) with charts and custom animations
• Symfony backend handling 10,000+ concurrent users at peak
• In-app purchases, Google Ads, and Unity Ads integration

Platform for booking in-home hair stylist appointments. Built the entire backend from the ground up.

• Built the complete backend using Symfony Framework from scratch
• Implemented payment system for bookings and service fees
• Developed hair stylist dashboard with detailed calendar and appointment management
• Built REST API for the mobile application