Aleksandar S.

• Led Android und iOS-Teams, die Produktlieferung und die Aufrechterhaltung der Ausrichtung zwischen Engineering, Design und Geschäftszielen.
• Implementierte technische Roadmaps, Kodierungsstandards und Architekturrichtlinien, Verbesserung der Code-Qualität und Reduzierung der technischen Schulden.
• Managed the employing and onboarding of more than 15 engineers, growing the mobile team by 300% and introduced scalable agile processes.
• Designed test automation frameworks and continuous integration pipelines, increasing release frequency while maintaining HIPAA compliance.
• Partnerschaft mit Führungskräften und Stakeholdern, um das Engineering KPIs mit OKR in Einklang zu bringen, die Produktgeschwindigkeit und langfristige Wartbarkeit auszugleichen.

A healthcare software startup focused on building mobile tools to help doctors accurately calculate pediatric medication doses.

• Developed both Android and iOS native applications, ensuring accuracy, reliability, and medical safety.

• Designed and implemented a precise dosage calculation system, minimizing input errors.

• Collaborated with medical consultants and product teams to align design and data validation.

• Participated in developer hiring and conducted technical interviews.

• Led Android and iOS engineering teams, supporting delivery planning, mentoring, and technical decision-making.
• Defined development processes, testing strategies, and quality standards across the mobile organisation.
• Conducted code reviews, pair programming sessions, and technical coaching for engineers.
• Participated in hiring, onboarding, and team growth initiatives.
• Collaborated with product and business stakeholders on roadmap planning and engineering objectives.
• Implemented automation, testing, and continuous improvement initiatives across the mobile teams.

Technologies: Kotlin, Swift, Android, iOS, Firebase, MVVM, Android Jetpack, Agile, Team Leadership

• Co-founded the company and contributed to product strategy, roadmap planning, and technical direction.
• Led the architecture and development of an IoT platform integrating connected devices, mobile applications, and cloud services.
• Built scalable backend APIs and communication layers for device connectivity and data exchange.
• Coordinated engineering activities across multiple workstreams and supported feature delivery.
• Represented the company in accelerator programmes, industry events, and investor meetings.

Technologies: AWS, Kotlin, MQTT, IoT, BLE, REST APIs

• Gründung des Unternehmens, die Definition der Produktsicht, der Roadmap und der langfristigen Strategie.
• Angeführt die Architektur Design und Entwicklung der IoT-Plattform, die Integration von Cloud-basierter Automatisierung und Analytik.
• Aufbau einer skalierbaren API-Infrastruktur und Kommunikationsschicht zwischen IoT-Geräten, mobilen Apps und Backend-Diensten.
• Definierte Projekt-Meilensteine, leiteten ein funktionales Engineering-Team und sorgten für die rechtzeitige Lieferung neuer Features.
• Vertretung Meeliana bei Branchenveranstaltungen, Investorentreffen und Beschleunigerprogrammen, um die frühzeitige Finanzierung zu sichern.

• Leitete die End-to-End-Entwicklung von sieben mobilen Anwendungen in den Bereichen Fitness, Gesundheitswesen und Finanzen, wobei der Schwerpunkt auf Leistung, Usability und Instandhaltung liegt.
• Designed and implemented Flutter applications using BLoC for State Management, integration REST APIs, Firebase and WebRTC for real-time communication and multimedia processing.
• Entwickelte und gewartete CI/CD-Pipelines mit GitHub Actions, die automatisierte Builds, Tests und Deployments ermöglichen und die Release-Zeit um 35% verkürzen.
• Leistungsprofiling und -optimierung sowohl auf Android als auch auf iOS, wodurch die Startzeiten der App verbessert und die Speicherauslastung verringert wird.

• Organized meetups, workshops, and conferences for regional developer communities.

• Delivered public talks on mobile development, freelancing, and remote collaboration.

• Helped grow the local engineering network tenfold through mentorship and advocacy.

A technology company developing connected fitness applications integrating BLE sensors and wearables.

• Led iOS application architecture redesign using MVVM and RxSwift to improve code maintainability.

• Improved Bluetooth communication reliability from 70% to nearly 100% through optimized multithreading.

• Built abstract communication layers for BLE devices, supporting multiple sensor types and vendors.

• Created a local iOS server with Swifter to mock APIs, enabling offline development.

• Delivered a proof-of-concept Android version using Kotlin for cross-platform testing.

J&J’s Health and Wellness division develops digital solutions supporting healthy lifestyles, preventive care, and chronic disease management.

• Led development of multiple HIPAA-compliant mobile applications used by thousands of patients.

• Designed modular Android architecture to support dynamic content updates and multi-device sync.

• Integrated apps with Salesforce backends using complex synchronization algorithms.

• Mentored 5+ developers, conducted weekly code reviews, and optimized CI/CD pipelines for consistency.

• Ensured code quality, performance, and scalability through strict review and test standards.

Infinite Leap provides location and asset management solutions for healthcare and logistics enterprises.

• Managed Android team delivery cycles and introduced structured sprint planning and retrospectives.

• Defined and enforced coding standards, improving overall codebase consistency and quality.

• Implemented code review and testing workflows, reducing bugs pre-release.

• Collaborated with PMs and designers to align mobile roadmap with client requirements.

Core member of the mobile team responsible for building Circle Medical’s Android platform from the ground up and scaling it to tens of thousands of active users.

• Developed HIPAA-compliant Android applications using Java and Kotlin, transitioning the app architecture from MVP to MVVM.

• Implemented mission-critical features such as video consultations, chat messaging, payment processing, insurance scanning, and PDF viewing.

• Integrated SDKs like ZoomUS, Stripe, Acuant, and PubNub for communication, payments, and real-time data streaming.

• Designed modular architecture, enabling parallel feature development across teams and improved scalability.

• Set up automated test suites using Espresso, JUnit, and Mockito, increasing stability and reducing crash rates by 40%.

• Collaborated with backend teams to ensure data synchronization and compliance with healthcare standards.

• Contributed to the development and scaling of a healthcare mobile platform used by a large patient base.
• Developed Android applications using Java and Kotlin, evolving the architecture from MVP to MVVM principles.
• Implemented automated testing strategies and engineering practices to improve application stability and maintainability.
• Integrated third-party services supporting communication, payments, document management, and real-time functionality.
• Collaborated closely with product, design, and engineering teams on planning, feasibility analysis, and feature delivery.
• Mentored engineers through code reviews, pair programming, and technical guidance.

Technologies: Java, Kotlin, Android, Firebase, Retrofit, MVVM, Mockito, Espresso, JUnit, Dagger, Android Jetpack, Bitrise

Client Engagements:

• Led dozen mobile projects for clients ranging from startups to global enterprises, including Nike, Coca-Cola, and Johnson & Johnson

• Served as Lead Mobile Engineer for a Y Combinator–funded startup, delivering a highly optimized mobile application

• Achieved 99.5% app stability, reduced crash rates by 40%, and supported a 20% increase in user base within 6 months

Leadership & Mentoring:

• Led 3 major delivery projects, including projects within Johnson & Johnson, ensuring 100% on-time delivery through improved processes and clear technical direction

• Mentored 5+ junior developers through weekly code reviews and pair programming, contributing to 30% reduction in development time as well as improved code quality and increased team productivity and client satisfaction.

• Delivered 15+ mobile projects for startups, scale-ups, and enterprise organisations across healthcare, consumer, fitness, retail, and business domains, including Nike, Coca-Cola, Johnson & Johnson and Deloitte.
• Led Android engineering initiatives for healthcare platforms, including engagements with Johnson & Johnson Health and Wellness Solutions, Inc., focusing on architecture design, synchronisation mechanisms, engineering quality, and team mentoring.
• Contributed to mobile projects for global consumer brands including Nike, developing Android applications, custom UI components, performance optimisations, and reusable development frameworks.
• Led mobile development for connected fitness and wearable-device solutions through engagements with INGSOFTWARE, implementing Bluetooth Low Energy (BLE) communication, reactive architectures, and iOS platform improvements.
• Supported Android team leadership and delivery management activities for Infinite Leap, introducing engineering standards, planning processes, and development workflows.
• Delivered Flutter, Android, and iOS solutions through consulting engagements with startups and enterprise organisations, including projects involving WebRTC, real-time communication, cloud integrations, analytics, and modern mobile architectures.
• Established CI/CD pipelines, release processes, engineering standards, and quality assurance practices across multiple projects.
• Progressed from senior engineering responsibilities into technical leadership roles, supporting hiring, mentoring, architecture decisions, and project delivery across multiple engagements.

Technologies: Kotlin, Java, Swift, Flutter, Dart, Android, iOS, Firebase, WebRTC, RxJava, RxSwift, MVVM, Clean Architecture, REST APIs, CI/CD, AWS

Founded a software agency specializing in Android development, delivering products for startups and enterprise clients worldwide.

• Managed a 13-member development team delivering 15+ Android applications.

• Architected an enterprise-grade app for the oil industry with dynamic UI generation from REST APIs.

• Rebuilt and modernized “My Diet Coach,” integrating Material Design and CI/CD — scaling the app to over 10M users.

• Promoted clean architecture, automation testing, and open-source adoption across the team.

• Founded and managed a software agency delivering Android solutions for startup and enterprise clients.
• Led a team of mobile engineers across multiple concurrent projects.
• Designed scalable Android architectures and integrated REST-based services.
• Promoted engineering best practices, automated testing, and CI/CD adoption.
• Coordinated project delivery, technical planning, and stakeholder communication.

Technologies: Java, Android, AWS, Retrofit, Travis CI, Bluetooth, NFC

Scopic Software builds custom software solutions for global clients in healthcare, education, and entertainment.

• Developed six Android apps integrating Google APIs and third-party REST services.

• Implemented a Java-based heart rate detection algorithm using fingertip image analysis.

• Established internal code standards and reusable libraries to improve efficiency.

• Developed Android applications integrating Google APIs and third-party services.
• Implemented application features involving data processing, device capabilities, and external integrations.
• Developed reusable libraries, utilities, and internal tooling to improve development efficiency.
• Established development standards and contributed to software quality initiatives.
• Built custom Android UI components and reusable application modules.

Technologies: Java, Android, Retrofit, Espresso, Google APIs

• Developed distributed test automation systems in C# for large-scale software validation.
• Built tools supporting performance, accuracy, and quality testing of enterprise applications.
• Implemented automated testing frameworks and engineering productivity improvements.
• Participated in software quality initiatives, bug triaging, and development processes.
• Collaborated with distributed engineering teams on software delivery and testing practices.

Technologies: C#, .NET, MSSQL, WPF, Test Automation

• Built Android und Flutter Anwendungen für Startups mit schnellen MVP-Zyklen.
• Mehrsprachige und Offline-fähige mobile Apps mit Zimmer, Retrofit und WorkManager.
• Integrierte Firebase-Dienste für Analyse, Remote-Konfiguration und Crash-Reporting.
• Alte Java-Apps wurden überarbeitet, um Kotlin zu helfen, die Code-Größe zu reduzieren und die Wartbarkeit zu verbessern.
• Mehrere Android- und Web-Projekte für kleine Unternehmen und Non-Profit-Unternehmen gebaut.
• Integrierte APIs wie JustGiving, Twitter, Google Maps und PayPal mit OAuth.
• Dynamische Webseiten mit JavaScript und jQuery für interaktive Frontends.

• Built multiple Android and web projects for small businesses and non-profits.

• Integrated APIs such as JustGiving, Twitter, Google Maps, and PayPal using OAuth.

• Delivered dynamic websites with JavaScript and jQuery for interactive frontends.

• Developed Android applications and web solutions for small businesses and non-profit organisations.
• Built web applications using PHP, JavaScript, HTML, CSS, and jQuery.
• Integrated third-party APIs and external services using REST and OAuth-based authentication.
• Delivered mobile and web projects across multiple freelance engagements.
• Collaborated directly with stakeholders to gather requirements and deliver custom solutions.

Technologies: Java, Android, PHP, JavaScript, HTML, CSS, jQuery, OAuth2, REST APIs

Microsoft Development Center Serbia is one of Microsoft’s global R&D hubs, focusing on software innovation and distributed systems.

• Developed internal tools and test automation systems for Windows and Office teams.

• Contributed to UI automation frameworks for validation of Windows mobile components.

• Assisted in backend service design for telemetry data ingestion.

• Participated in agile sprints, bug triaging, and code quality reviews.

• Collaborated with cross-functional global teams to align software integration processes.