Djuro A.

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.

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.

• Suunnittelujohtaja;
• iOS-johtaja.

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.

• Kokenut iOS-kehittäjä.

• Suunnitellut ja kehittänyt iOS- / MacOS- / React- / React Native -sovelluksia;
• Työskennellyt tiiminvetäjänä ja asiantuntijahaastattelijana.

• iOS-ohjaaja;
• Ohjelmistosuunnittelujohtaja;
• Projektijohtaja;
• CTO.

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.

• Työskennellyt ohjelmistokehityksen koko elinkaaren parissa (.NET, Java);
• Työskennellyt johtavana ohjelmistoarkkitehtina.