Senior macOS & iOS Engineer · Technical Lead

I build native Apple experiencesfrom system architecture to the last pixel.

I’m Viorel Porumbescu, a senior Apple-platform engineer and technical lead. I design and ship native macOS and iOS products, combining deep platform engineering with thoughtful, user-centred interface design.

Portrait of Viorel Porumbescu

Based in Sibiu, Romania

01

Experience

Deep platform work, delivered with product judgement.

From independent utilities to endpoint security used in production, I work across architecture, interface design, delivery, and technical leadership.

Professional experience

02

Selected products

Useful software, built all the way through.

Independent products and focused experiments where I owned the idea, native implementation, visual system, and the details required to ship.

Selected products
QR Studio PRO product overview showing QR design and analytics features

Product design · Native app · Service integration · Website · Release

QR Studio combines a visual QR designer, built-in scanner, multi-format export, dynamic links, and analytics in one focused native Mac product. A printed code can point somewhere new without being reprinted, while its dashboard turns scan activity into useful audience insight.

  • Custom pixels, eyes, colours, backgrounds, corner radius, and embedded logos.
  • Screen, document, and webcam scanning.
  • PNG, JPEG, SVG, and PDF export at any resolution.
  • Dynamic-link management and real-time scan analytics.
  • A one-time purchase with no subscription.
SwiftAppKitQRAnalyticsmacOS

03

Open source

Native components shared with the community.

Small, focused libraries shaped by real interface work—and made reusable for other macOS and Apple-platform developers.

Open-source work

04

Beyond the build

The range behind the products.

My work spans endpoint security, networking, privileged macOS services, real-time communications, NFC, cryptography, document signing, and polished consumer utilities. I’m comfortable owning the complete product lifecycle: architecture, implementation, UI/UX, testing, CI/CD, signing, notarization, distribution, and long-term maintenance.

Expertise, education and recognition

Core expertise

Apple platforms

macOS · iOS · Swift · Objective-C · AppKit · UIKit · SwiftUI

Systems & security

Privileged services · XPC · Network Extensions · System Extensions · Endpoint security · NFC · Cryptography

Product engineering

Architecture · UI/UX design · REST APIs · Persistence · Real-time communications · Performance · Testing

Delivery & leadership

Technical direction · Mentoring · Code review · CI/CD · Signing & notarization · App Store release · Diagnostics

Education

2019 — 2021

Doctoral studies, Mathematics & Computer Science

University of Craiova

Research focused on nonlinear systems over nonsupersingular elliptic curves, elliptic-curve cryptography, and digital security.

2016 — 2018

Master’s degree, Advanced Techniques for Information Processing

University of Craiova

2013 — 2016

Bachelor’s degree, Computer Science

University of Craiova

Recognition

2nd place

Advent of Code / Dolj

2019

4th place

Advent of Code / Dolj

2018

1st place

Mobile Coding Contest · Catalyst GmbH

2017

1st place

National Student Communications Session · University of Craiova

2015

Contact

Let’s make something
worth using.

Have a product, architecture challenge, or Apple-platform team that could use experienced hands? I’d be glad to hear about it.

viorelporumbescu@outlook.com
Sibiu, Romania+40 755 044 244