Aleksandar S.

Circle Medical is a Y Combinator–backed telemedicine company providing primary care and mental health services via mobile and web platforms.

• Led Android and iOS teams, driving product delivery and maintaining alignment between engineering, design, and business goals.
• Implemented technical roadmaps, coding standards, and architecture guidelines, improving code quality and reducing technical debt.
• Managed the hiring and onboarding of over 15 engineers, growing the mobile team by 300% and introducing scalable agile processes.
• Designed test automation frameworks and continuous integration pipelines, increasing release frequency while maintaining HIPAA compliance.
• Partnered with executives and stakeholders to align engineering KPIs with OKRs, balancing product speed and long-term maintainability.

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.

Meeliana is an IoT startup developing a property automation platform for residential and commercial buildings, integrating smart sensors for monitoring and control. The project was part of the Raising Starts Accelerator and showcased at Expo Dubai 2020.

• Co-founded the company, defining the product vision, roadmap, and long-term strategy.
• Led the architecture design and development of the IoT platform, integrating cloud-based automation and analytics.
• Built a scalable API infrastructure and communication layer between IoT devices, mobile apps, and backend services.
• Defined project milestones, led a cross-functional engineering team, and ensured the timely delivery of new features.
• Represented Meeliana at industry events, investor meetings, and accelerator programs, securing early-stage funding.

MindTrust Labs is a US-based digital consultancy delivering AI-driven, web, and mobile solutions to startups and global enterprises. The company helps clients transform ideas into scalable digital products through innovative design and modern engineering practices.

• Led the end-to-end development of seven mobile applications across fitness, healthcare, and finance sectors, focusing on performance, usability, and maintainability.
• Designed and implemented Flutter applications using BLoC for state management, integrating REST APIs, Firebase, and WebRTC for real-time communication and multimedia processing.
• Developed and maintained CI/CD pipelines using GitHub Actions, enabling automated builds, testing, and deployments, and reducing release time by 35%.
• Conducted performance profiling and optimization on both Android and iOS, improving app startup times and reducing memory usage.

• 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.

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.

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.

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.

Aleksandar developed mobile and fullstack solutions for clients in finance, FMCG, eCommerce, and logistics.

• Built Android and Flutter applications for startups with rapid MVP cycles.
• Delivered multi-language, offline-capable mobile apps using Room, Retrofit, and WorkManager.
• Integrated Firebase services for analytics, remote configuration, and crash reporting.
• Refactored legacy Java apps to Kotlin, reducing code size and improving maintainability.
• 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.

• 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.

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.