Djuro A.

Djuro A.

Senior iOS Developer

Top performer 10/10
Serbia
Trusted member since 2021
18 years of experience

He has great expertise in React and React Native and has already developed over 170 iOS applications. Most of them are published on the App Store, and some are distributed as enterprise apps.

Djuro has a strong knowledge of how to work with all sorts of frameworks, MapKit, CoreAnimation, CoreBluetooth, and communicating with backend servers. He is well-versed in building UI using Storyboards, XIBs, IN-code. Djuro has worked with Sketch, Zeplin, Figma, and InVision to implement pixel-perfect designs.

He can effortlessly mentor a team of junior developers and have a way with every team member.

Main expertise

iOSiOS18 years
React NativeReact Native5 years
SwiftSwift11 years
Objective-CObjective-C18 years
5+

Experience9

Kokoon

Engineering Lead

Kokoon
Music and Audio
Jul 2022 · 3y 8m

Kokoon is a technology company specializing in sleep science and audio technology, creating smart headphones and mobile applications that combine neuroscience, sound, and machine learning to help users improve their sleep and relaxation. Starting as an iOS Engineer and later assuming more responsibilities as Engineering Lead, Djuro contributed across multiple capacities — from hands-on iOS development to product engineering and team leadership — driving Kokoon’s mobile platform and sleep analytics technology.

Senior iOS Engineer

  • Led the development of Kokoon’s iOS app, integrating TensorFlow-based sleep tracking models to deliver personalised insights.
  • Optimised performance and scalability across Swift and SwiftUI components, ensuring smooth data collection and an engaging user experience.
  • Collaborated closely with design and data science teams to translate research into production-ready features.

Senior Technical Product Engineer

  • Bridged engineering and product, owning the definition, prioritisation, and delivery of sleep health features.
  • Translated customer feedback and analytics into technical requirements, shaped roadmap decisions, and validated impact with A/B testing.
  • Worked cross-functionally with data scientists, product managers, and business stakeholders to align feature development with company goals.

Engineering Manager

  • Managed and mentored a distributed iOS and mobile engineering team, introducing best practices in code quality, CI/CD, and Agile processes.
  • Drove architectural decisions to support long-term scalability.
  • Championed team growth through coaching and career development, while also ensuring timely delivery of business-critical product initiatives.
iOSiOS
SwiftSwift
FigmaFigma
TensorFlowTensorFlow
Product Development
3+

iOS Lead

Cirqil, Inc
Entertainment and Media
Jan 2022 - Apr 2022 · 3m

Led the iOS engineering team in designing and developing the MVP for Cirqil, a productivity-focused mobile application. Oversaw the entire development lifecycle — from architecture and feature planning to App Store deployment — while ensuring a scalable, maintainable SwiftUI codebase aligned with modern iOS best practices.

SwiftSwift
FigmaFigma
Storyboard
JiraJira

Director of Engineering / iOS Lead

Lolly
Oct 2020 · 5y 5m
  • Director of engineering;
  • iOS lead;
Reddit

iOS Lead @ Profiles

Reddit
Social Media
Jun 2019 - Jun 2021 · 2y

Reddit is one of the world’s largest social media and community platforms, hosting hundreds of millions of users worldwide. The company focuses on building scalable, performant mobile experiences that foster global engagement across diverse communities.

  • Led a high-impact iOS team working on features used by hundreds of millions of users.
  • Provided technical guidance through architectural reviews, in-depth code reviews, and mentorship, ensuring code quality and scalability in a fast-growing app environment.
  • Collaborated cross-functionally with product managers, designers, backend engineers, and data scientists to shape product requirements.
  • Defined realistic timelines and priorities that balanced innovation with stability, helping deliver new experiences to Reddit’s global audience on schedule.
  • Implemented and championed best practices for iOS development: Including modern Swift/SwiftUI adoption, performance profiling for large-scale feeds, unit/UI testing strategies, and CI/CD automation. This reduced crash rates, improved app responsiveness, and set a foundation for maintainable long-term growth.
iOSiOS
SwiftSwift
FigmaFigma
Unit Testing
Objective-CObjective-C
2+
Reddit
Medable

Senior iOS Developer

Medable
Healthcare IT
Oct 2017 - Jun 2019 · 1y 8m
  • A Senior iOS developer.
React.jsReact.js
React NativeReact Native
FlutterFlutter
iOSiOS
SwiftSwift
2+
Symphony

Senior Software Engineer

Symphony
Oct 2016 - Aug 2017 · 10m
  • Designed and developed iOS/MacOS/React/React Native applications;
  • Worked as a Team lead and Expert Interviewer.
Chess.com
Cubes

Senior Software Engineer / CTO

Cubes
Sep 2015 - Sep 2016 · 1y
  • iOS instructor;
  • Software engineering manager;
  • Project Manager;
  • CTO.
Cubes

Director of Engineering / CTO

Cubes
Education
Sep 2015 - Sep 2017 · 2y

Cubes is an education technology company focused on delivering innovative learning solutions through mobile and web applications. The organisation emphasises the integration of engaging user experiences with scalable, modern software architectures.

  • Spearheaded the end-to-end development of innovative iOS products, from initial concept through launch, ensuring technology initiatives were tightly aligned with client and business objectives.
  • Partnered with stakeholders to define roadmaps, translate requirements into technical solutions, and deliver polished apps that met both market demands and user expectations.
  • Provided strategic direction and technical leadership across the organisation, guiding the adoption of emerging technologies, modern iOS frameworks, and engineering best practices.
  • Established coding standards, architectural patterns, and CI/CD processes that elevated product quality, accelerated delivery, and set a foundation for long-term scalability.
JavaScriptJavaScript
React.jsReact.js
React NativeReact Native
.NET.NET
iOSiOS
4+
Ministry of Defense

Senior Software Engineer

Ministry of Defense
Aerospace and Defense
Sep 2006 - Aug 2015 · 8y 11m
  • Worked on full software development lifecycle (.NET, Java);
  • Worked as a Chief software architect.
JavaScriptJavaScript
React.jsReact.js
JavaJava
.NET.NET
iOSiOS
Objective-CObjective-C

Assessments

Engineering excellence

Djuro’s overall performance in a 90-minute live technical assessment ranks in the top 5% of vetted Senior iOS Developers at Proxify.

Portfolio

Highlighted by Djuro

Reddit 1
Jun 2019 · Reddit
Reddit

Welcome to Reddit, the heart of the internet.

Reddit is a social network with something for everyone: trending topics, diverse discussions, and engaging communities and comment threads.

Redditors have authentic and interesting conversations around all sorts of curated content. You’ll find gaming communities, bloggers, meme-makers, fandoms, travel enthusiasts, support groups, AI forums, news junkies, artists, and creators of all types.

Duration2y

Other projects 1

Chess.com

Education

UOD
University of Defence
Software Engineering2001 - 2006
Military Academy
Military Academy
Software Engineering2001 - 2006

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