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Aleksandar S.
Software Engineer
Aleksandar er Senior Software and Mobile Engineer med over 14 års erfaring, specialiseret sig i at udvikle indfødte og cross-platform mobile applikationer ved hjælp af Android, iOS og Flutter. Han kombinerer dyb teknisk ekspertise med leder- og mentorfærdigheder for at hjælpe teams med at levere stabile, skalerbare og brugerfokuserede mobilprodukter.
Han har samarbejdet med globale mærker som Coca-Cola, Nike, Deloitte og Johnson & Johnson gennem både uafhængige projekter og konsulentaftaler. På Circle Medical, han førte Android og iOS-hold, implementeret CI/CD automatisering, og boostet mobil ydeevne med 300%.
Aleksandar er anerkendt for at skabe effektive udviklingsprocesser, opretholde kodebaser af høj kvalitet, og give teams mulighed for at nå og overskride deres mål, konsekvent levere effektfulde og pålidelige mobile løsninger.
Hovedekspertise
- Flutter 5 år

- Dart 5 år

- Android 15 år

Andre færdigheder
- Google Maps 9 år

- Mocha.js 2 år

- Zustand 2 år
Udvalgt oplevelse
Beskæftigelse
Mobile Tech Lead
Circle Medical Technologies - 3 flere år 4 måneder
- Led Android og iOS-teams, kørsel af produkt levering og vedligeholdelse af tilpasning mellem ingeniør-, design- og forretningsmål.
- Gennemførte tekniske køreplaner, kodningsstandarder og arkitekturretningslinjer, forbedring af kodekvalitet og reduktion af teknisk gæld.
- Administreret leje og onboarding af over 15 ingeniører, voksende mobile team med 300% og indføre skalerbare agile processer.
- Designet test automation rammer og kontinuerlig integration rørledninger, øge udgivelse frekvens samtidig bevare HIPAA overholdelse.
- Partnerskab med ledere og interessenter til at tilpasse ingeniør-KPI'er til OKRs, balancerende produkthastighed og langsigtet vedligeholdelse.
Teknologier:
- Teknologier:
Android
Swift
Kotlin
Firebase
MVVM
Agile
REST API
- Team Leading
Android Jetpack
Senior Android Engineer
Konstrukt - 10 måneder
A healthcare software startup focused on building mobile tools to help doctors accurately calculate pediatric medication doses.
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Developed both Android and iOS native applications, ensuring accuracy, reliability, and medical safety.
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Designed and implemented a precise dosage calculation system, minimizing input errors.
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Collaborated with medical consultants and product teams to align design and data validation.
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Participated in developer hiring and conducted technical interviews.
Teknologier:
- Teknologier:
Android
iOS
Swift
Kotlin
REST API
SwiftUI
Android Jetpack
Android NDK
-
Co-Founder & Platform Lead
Meeliana - 1 år 5 måneder
- Medstiftet virksomheden, der definerer produktvision, køreplan og langsigtet strategi.
- Led arkitektur design og udvikling af IoT-platformen, der integrerer cloud-baseret automatisering og analytics.
- Opbygget en skalerbar API-infrastruktur og kommunikationslag mellem IoT-enheder, mobile apps og backend-tjenester.
- Definerede projektmilepæle, førte et tværfunktionelt ingeniørhold, og sikrede rettidig levering af nye funktioner.
- Repræsenteret Meeliana ved branchearrangementer, investormøder og acceleratorprogrammer, sikre tidlig finansiering.
Teknologier:
- Teknologier:
AWS
Android
Kotlin
REST API
- MQTT
- Internet of Things (IoT)
BLE
Senior Mobile Engineer
MindTrust Labs - 7 flere år
- Led end-to-end udvikling af syv mobile applikationer på tværs af fitness, sundhedspleje og finanssektorer, med fokus på ydeevne, brugervenlighed og vedligeholdelse.
- Designet og implementeret Flutter applikationer ved hjælp af BLoC til statslig ledelse, integration REST API'er, Firebase, og WebRTC til real-time kommunikation og multimedie-behandling.
- Udviklede og vedligeholdt CI/CD-rørledninger ved hjælp af GitHub Handlinger, der muliggør automatiserede bygninger, test og implementeringer, og reducerer frigivelsestiden med 35%.
- Gennemført performance profilering og optimering på både Android og iOS, forbedre app opstart tider og reducere hukommelsesforbrug.
Teknologier:
- Teknologier:
AWS
Flutter
Android
iOS
Swift
Firebase
Dart
REST API
WebRTC
Bloc
SwiftUI
GitHub Actions
Community Leadership & Public Speaking
Niš Tech Community - 1 år 9 måneder
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Organized meetups, workshops, and conferences for regional developer communities.
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Delivered public talks on mobile development, freelancing, and remote collaboration.
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Helped grow the local engineering network tenfold through mentorship and advocacy.
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Lead Mobile Engineer (Consultant)
INGSOFTWARE - 10 måneder
A technology company developing connected fitness applications integrating BLE sensors and wearables.
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Led iOS application architecture redesign using MVVM and RxSwift to improve code maintainability.
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Improved Bluetooth communication reliability from 70% to nearly 100% through optimized multithreading.
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Built abstract communication layers for BLE devices, supporting multiple sensor types and vendors.
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Created a local iOS server with Swifter to mock APIs, enabling offline development.
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Delivered a proof-of-concept Android version using Kotlin for cross-platform testing.
Teknologier:
- Teknologier:
Swift
Kotlin
MVVM
Realm
Alamofire
BLE
-
Lead Android Engineer
Johnson & Johnson Health and Wellness Solutions - 1 år 3 måneder
J&J’s Health and Wellness division develops digital solutions supporting healthy lifestyles, preventive care, and chronic disease management.
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Led development of multiple HIPAA-compliant mobile applications used by thousands of patients.
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Designed modular Android architecture to support dynamic content updates and multi-device sync.
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Integrated apps with Salesforce backends using complex synchronization algorithms.
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Mentored 5+ developers, conducted weekly code reviews, and optimized CI/CD pipelines for consistency.
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Ensured code quality, performance, and scalability through strict review and test standards.
Teknologier:
- Teknologier:
Java
Jenkins
Kotlin
Retrofit
MVVM
Jira
- Dagger
Salesforce
-
Android Team Lead (Consultant)
Infinite Leap - 11 måneder
Infinite Leap provides location and asset management solutions for healthcare and logistics enterprises.
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Managed Android team delivery cycles and introduced structured sprint planning and retrospectives.
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Defined and enforced coding standards, improving overall codebase consistency and quality.
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Implemented code review and testing workflows, reducing bugs pre-release.
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Collaborated with PMs and designers to align mobile roadmap with client requirements.
Teknologier:
- Teknologier:
Java
Retrofit
Jira
Git
- Dagger
-
Lead Android Engineer
Circle Medical - 5 flere år
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.
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Developed HIPAA-compliant Android applications using Java and Kotlin, transitioning the app architecture from MVP to MVVM.
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Implemented mission-critical features such as video consultations, chat messaging, payment processing, insurance scanning, and PDF viewing.
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Integrated SDKs like ZoomUS, Stripe, Acuant, and PubNub for communication, payments, and real-time data streaming.
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Designed modular architecture, enabling parallel feature development across teams and improved scalability.
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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.
Teknologier:
- Teknologier:
Java
Android
Kotlin
Firebase
Retrofit
Mockito
Espresso
MVVM
JUnit
Agile
- Dagger
- Team Leading
Gradle
Stripe
Android Jetpack
Bitrise
-
Senior Mobile Engineer
Toptal - 10 flere år 10 måneder
Client Engagements:
-
Led dozen mobile projects for clients ranging from startups to global enterprises, including Nike, Coca-Cola, and Johnson & Johnson
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Served as Lead Mobile Engineer for a Y Combinator–funded startup, delivering a highly optimized mobile application
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Achieved 99.5% app stability, reduced crash rates by 40%, and supported a 20% increase in user base within 6 months
Leadership & Mentoring:
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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.
Teknologier:
- Teknologier:
Java
Android
iOS
Swift
Kotlin
Retrofit
- Dagger
Realm
RxSwift
-
CEO & Android Team Lead
Singularity Software - 1 år 3 måneder
Founded a software agency specializing in Android development, delivering products for startups and enterprise clients worldwide.
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Managed a 13-member development team delivering 15+ Android applications.
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Architected an enterprise-grade app for the oil industry with dynamic UI generation from REST APIs.
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Rebuilt and modernized “My Diet Coach,” integrating Material Design and CI/CD — scaling the app to over 10M users.
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Promoted clean architecture, automation testing, and open-source adoption across the team.
Teknologier:
- Teknologier:
AWS
Java
Retrofit
Travis CI
Bluetooth
- NFC
-
Senior Android Engineer
Scopic Software - 7 måneder
Scopic Software builds custom software solutions for global clients in healthcare, education, and entertainment.
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Developed six Android apps integrating Google APIs and third-party REST services.
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Implemented a Java-based heart rate detection algorithm using fingertip image analysis.
-
Established internal code standards and reusable libraries to improve efficiency.
Teknologier:
- Teknologier:
Java
Android
Retrofit
Espresso
-
Mobile Engineer
Various Clients - 14 flere år 9 måneder
- Bygget Android og Flutter applikationer til nystartede med hurtige MVP cyklusser.
- Leverede multi-sprog, offline-kompatible mobile apps ved hjælp af Room, Retrofit og WorkManager.
- Integrerede Firebase-tjenester til analyse, ekstern konfiguration og nedbrudsrapportering.
- Refactored arv Java apps til Kotlin, reducere kode størrelse og forbedre vedligeholdelse.
- Bygget flere Android og web-projekter for små virksomheder og non-profits.
- Integrerede API'er såsom JustGiving, Twitter, Google Maps, og PayPal bruger OAuth.
- Leveret dynamiske hjemmesider med JavaScript og jQuery for interaktive frontends.
Teknologier:
- Teknologier:
PHP
HTML
CSS
jQuery
Flutter
Java
Android
Swift
Kotlin
Firebase
Retrofit
MVVM
OAuth2
- Dagger
Realm
Material-UI
REST API
Android & Web Developer (Freelance)
Various Clients - 2 flere år
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Built multiple Android and web projects for small businesses and non-profits.
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Integrated APIs such as JustGiving, Twitter, Google Maps, and PayPal using OAuth.
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Delivered dynamic websites with JavaScript and jQuery for interactive frontends.
Teknologier:
- Teknologier:
PHP
JavaScript
HTML
CSS
jQuery
Java
OAuth2
REST API
-
Software Developer
Microsoft Development Center Serbia (MDCS) - 2 flere år
Microsoft Development Center Serbia is one of Microsoft’s global R&D hubs, focusing on software innovation and distributed systems.
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Developed internal tools and test automation systems for Windows and Office teams.
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Contributed to UI automation frameworks for validation of Windows mobile components.
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Assisted in backend service design for telemetry data ingestion.
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Participated in agile sprints, bug triaging, and code quality reviews.
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Collaborated with cross-functional global teams to align software integration processes.
Teknologier:
- Teknologier:
MSSQL
C#
.NET
DevOps
WPF
Agile
-
Uddannelse
MSc.Computer Science and Software Engineering
University of Nis, Serbia · 2011 - 2014
BSc.Computer Engineering
University of Nis, Serbia · 2007 - 2011
Portefølje
Find din næste udvikler inden for få dage, ikke måneder
Book en 25-minutters samtale, hvor vi:
- udfører behovsafdækning med fokus på udviklingsopgaver
- Forklar vores proces, hvor vi matcher dig med kvalificerede, godkendte udviklere fra vores netværk
- beskriver de næste trin for at finde det perfekte match på få dage

















































































