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Srdjan Delić, Senior Mobile & Product Engineer

I own mobile products end to end: the spec, the architecture, the code, the release, and the numbers afterwards. 25+ years of it, for Telenor, VIP Mobile, NIS, and Porr Group, plus my own products shipped to consumers.

Mobile Product OwnershipFullstack Engineering (MERN)Team & Product LeadershipWeb3 & Blockchain
View My Work

Projects

Mirrored 'P' letters on a dark background and large title font for Picture Paste

Picture Paste

Photo-editing app for Android that lets users merge and layer multiple images. Handled everything: UX design, Java implementation, Play Store listing, and post-launch updates.


Stack
  • Android
  • Java
Large white 'T' letter on a pink background with the home screen of the app

Tag Me Freely

Social-media productivity app with a library of 5,000+ hashtags for Instagram and Twitter/X. Built a Room-backed local database, 12 user-selectable themes, and a content update pipeline.


Stack
  • Android
  • Java
  • Room
Bright green image with screenshots of the Remember the Day app

Remember the Day

Minimalist personal diary app for Android. Kept the scope tight by design: a clean SQLite data model, fast UX flow, and nothing that doesn't need to be there.


Stack
  • Android
  • Java
  • SQLite
Blue background image with the Swear Jar title text with screenshots of the app

The Swear Jar

Habit-tracking app with an unconventional mechanic: instead of charging users money, it progressively damages their wallpaper. Designed the gamification logic, built a customisable penalty system, and shipped it to the Play Store.


Stack
  • Android
  • Java
All work and products →

What I Do

Engineering, product ownership, and the leadership that ships them.

Mobile Product Ownership

Android and cross-platform products from the first backlog item to the Play Store release. I define scope, drive delivery, and stay accountable for the outcome.

AndroidReact NativeiOSProduct StrategyPlay Store

Fullstack Engineering (MERN)

Web apps and APIs built with MongoDB, Express, React, and Node.js. Database schema, REST and GraphQL endpoints, Next.js front end, whatever the project needs.

ReactNext.jsNode.jsExpressMongoDB

Team & Product Leadership

Sprint planning, technical direction, code reviews, and keeping engineering and business goals in sync. I have led teams through full product cycles across multiple companies.

Team LeadershipAgileProduct ManagementMentoring

Web3 & Blockchain

Smart-contract integration, wallet connectivity, and decentralised feature design for mobile and web products.

Web3BlockchainSmart ContractsDApps

Companies & Projects

Client and employer projects I delivered as part of a team: my role, what we built, and the stack behind it.

  • MTVTR at Intellex, Lead Mobile Developer. Native Android and iOS training app for corporate teams. Led mobile development from architecture through delivery. Technologies: Android Native, iOS Native. View more
  • Team Team at Digital Bridges, Lead Mobile Developer. Cross-platform team management and scheduling app (Android + iOS) for sports clubs across Austria. Responsible for the mobile product layer from design through Play Store and App Store release. Technologies: React Native, Android, iOS. View more
  • Porr Group App at Intellex, Mobile Developer. Presentation creation and management platform for Porr Group, one of Austria's largest construction companies. Delivered native Android and iOS builds integrated with their investor-relations workflow. Technologies: Android Native, iOS Native. View more
  • Orion Box (Laki) at Intellex, Lead Developer & Designer. Custom Smart IPTV and video-streaming platform built on Android. Designed the full product: UX concept, hardware profile, C++ media pipeline, and Java application layer. Shipped to consumers under the Laki brand. Technologies: Android Native, Java, C++. View more
  • VIP Magic Box at Intellex, Senior Android Developer. Android movie-streaming platform for VIP Mobile. Integrated with operator back-end systems and shipped as a consumer product. Technologies: Android Native, Java. View more
  • KiloCoach at Intellex, Senior Android Developer. Daily calorie-intake tracking and coaching app for Android. Built the data persistence layer, nutrition logic, and personalised meal recommendations. Technologies: Android Native, Java. View more
  • PlayHub at Intellex, Senior Android Developer. Android app aggregating YouTube and Daily Motion streams into a single playback experience, with subscription management and watch history. Technologies: Android Native, Java. View more
  • Telenor Retail Mode at Intellex, Senior Android Developer. Custom Android launcher deployed across Telenor retail stores in Serbia. Showed operator plans and device demos to in-store staff and customers. Technologies: Android Native, Java. View more
  • NIS Leader Onboarding at Intellex, Senior Android Developer. Onboarding app for NIS (Gazprom Neft Serbia) walking new team leaders through company processes, compliance requirements, and culture. Technologies: Android Native, Java. View more
  • Hundo at Intellex, Senior Android Developer. Android app for dog owners covering breed discovery, health tracking, and community features. Built the full Android layer including local data sync and push notifications. Technologies: Android Native, Java. View more
  • ESAR Cars at ESAR, Lead Mobile Developer. Native car-rental app for Android and iOS with vehicle browsing, booking, and reservation management integrated with ESAR's fleet system. Technologies: Android Native, iOS Native. View more
  • Samo Ne Autom at SNA, Senior Android Developer. Ecological Android app promoting CO₂ emission reduction by tracking alternative commuting habits and gamifying sustainable transport choices. Technologies: Android Native, Java. View more
  • vInci at Comtrade - CT360, Lead Developer. EU AAL-funded elderly-care platform connecting seniors with caregivers and health professionals. Android client backed by a Spring Boot / JHipster API, Dockerised infrastructure, PostgreSQL, and local SQLite sync. Technologies: Android Native, Java, Spring Boot, JHipster, Docker, Docker Compose, PostgreSQL, SQLite. View more
All client projects →

Writing

Notes on Android, software architecture, and engineering practice, published on Medium.

All articles →

About Me

I'm a senior mobile and product engineer with 25+ years in software development. Based in Serbia, working with international clients, I have shipped products across Android, iOS, MERN fullstack, and Web3, and I own them from the initial spec through engineering, release, and whatever the numbers say afterwards.

My work covers Solutions Architect, Product Management, Lead Mobile Developer and Senior Android Engineer roles at companies including Duronis, Intellex, Comtrade CT360, Digital Bridges, and ESAR. Client work includes Telenor, VIP Mobile, NIS, and Porr Group, alongside independent products: a Smart IPTV platform (Orion Box / Laki) and vInci, an EU AAL-funded elderly-care platform.

  • Mobile Product OwnershipAndroid and cross-platform products, from the first design decision to the Play Store release and everything after it.
  • Fullstack Engineering (MERN)Node.js, Express, React, and Next.js. API design through production deployment.
  • Team & Product LeadershipGrowing engineering teams, running product cycles, and keeping business and technical work aligned.
  • Web3 & BlockchainDecentralised products and smart-contract integration in mobile and web apps.
  • IT Career ConsultingAuthor and mentor helping engineers figure out their next move and get there.

    2003

    Started my professional software development journey

    2004

    Part-time work as a computer servicer

    2005

    Achieved a milestone by selling my first 3DS Max project

    2010

    Published my first Android app on the Play Store

    2011

    Expanded my developer skills by working as a freelance developer, working on diverse projects

    2016

    Stepped into a leadership role as a Senior Android developer

    2019

    Broadened my skill set with native Android and iOS development

    2025

    Working on blockchain and web3 projects. Utilizing bleeding-edge AI solutions to build innovative products

    2026

    Continuously exploring new opportunities and technologies

Contact Me


Let's Connect.
I'm always open to discussing new project ideas, exploring potential collaborations, or opportunities to contribute to any team or individual.

You can reach me using the form below or using my social media links.