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djuro

iOS & Technical Product Engineer

I build and scale mobile products end‑to‑end. 18 years in iOS (Objective‑C & Swift, SwiftUI), with hands‑on leadership as CTO, Director of Engineering, EM, Lead, and Technical Product Manager. I pair engineering rigor with product strategy—from discovery and experimentation to execution and growth.

Impact areas: product discovery, analytics & experimentation (A/B), monetization (IAP/subs), activation & retention, performance & reliability, and high‑leverage team practices.

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If I were to describe myself in a simple way, I would emphasize these skills:


Developer
Problem Solver
Engineer
Lead
Thinker
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About Me

I'm a Senior iOS Developer from Belgrade, Serbia. I build reliable, fast apps (Obj‑C/Swift/SwiftUI), integrate analytics, and design for growth. Background in Computer Science; graduated in Cryptography.

Beyond engineering, I operate as a Technical Product Engineer—owning discovery → delivery → measurement. I enjoy turning ambiguous problems into shipped features with measurable outcomes.

GitHub

Skills in iOS engineering and technical product work.

  • Objective‑C & Swift, SwiftUI, UIKit; clean architecture
  • Core frameworks: MapKit, CoreAnimation, CoreBluetooth; robust networking
  • Design systems, pixel‑perfect UI (Figma/Sketch/Zeplin)
  • Product analytics, event taxonomy, funnels (retention/activation)
  • Experimentation (A/B), guardrails, impact sizing
  • Monetization: IAP, subscriptions, pricing & paywall UX
  • Leadership: Team Lead & EM across full product lifecycle

Weight Lifting is something that completes me. I like being fitness instructor and helping others in achieving their goals.

Books are something which I like the most. Every single day I wake up at 4:45am and first thing on my plate is reading 6-7 books in parallel.

Mentoring is something I really enjoy doing. I like teaching others to code. I was mentor in several University Institutions and even now I teach iOS regularly.

Cooking has been a passion of mine for a number of years. I'm a foodie, that simple 😊

I have a number of interests that define me as a person.

  • Recently I'm more and more into Bitcoin. I've created a Bitcoin Cash Register for Bitcoin.com and then my journey through Crypto world began.
  • One of my passions is chess. I started late with it, but Grandmaster started teaching me chess and now I've improved a lot. Maybe we can play a game or two on Chess.com.
  • I really enjoy playing video games. My favorite are stealth games, the ones where you need to carefully think about your tactics and to try and finish it with the best possible score. Hitman.
  • I also love to listen to all types of music. Literally from classics all the way to Rap and R&B.
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Apps

Over 197 apps for various companies. Highlights below; many are enterprise‑distributed.

Complete Portfolio

Here's What Colleagues Are Saying

I was always impressed by Djuro's ability to complete the work assigned to him on time. Djuro not only met deadlines but also explains his programs in a way that non-experts can easily understand. This skill came in handy when he presented his programs to clients who weren't particularly tech savvy. Also his dedication to work and constant improvement were very remarkable. I had a lot of fun working with him and I've learned a lot
Uros Milivojevic
I had the pleasure of working with Djuro for two years collaborating on several iOS projects. He highly knowledgeable in his field of iOS mobile development and, at the same time, is capable of quickly understanding the client requirements. I am glad to have found him and now I can outsource any project to him without a worry and at a reasonable cost. I highly recommend Djuro Alfirevic.
Mladen Babic
Djuro is a great professional, always dedicated to what he's doing with desire to improve. We had a lot of fun working together and I've learned a lot.
Lazar Kovacic
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Developed Apps

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Years of Experience

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Open Source Projects

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Codementor Rating

Copyright © Djuro Alfirevic 2025