Hire the Best iOS Developers
in Serbia

Clients don't pay for code - they pay for results. That's what I focus on. I help startups and product teams deliver high-quality iOS apps - on time, with clean architecture and measurable results. Over 7 years, I've built and shipped 20+ native iOS applications across fintech, healthcare, CRM, and edtech. I work across the full cycle: from scratch builds to legacy upgrades, bug fixes, and team coordination as a tech lead. What I've delivered: - Built 20+ production apps used by real customers across 4 industries - Helped teams reduce development friction by leading designers, backend devs, and QA - Delivered clean, scalable codebases using Swift, SnapKit, Firebase, and REST APIs - Converted Figma designs into pixel-perfect, performant UIs - Helped clients ship faster by establishing Agile workflows and JIRA-based task management Domains where I've driven results: - Fintech - banking, payments, card and account management - Healthcare & Wellness - activity tracking, reminders, sleep analytics - CRM - client management tools for service businesses - EdTech - interactive lessons, progress tracking, engagement features If you need an iOS developer who takes ownership and delivers - let's talk. Main technology stack UI: Swift, SwiftUI, UIKit, SnapKit, Interface Builder Networking & backend: REST API, Firebase (Database, Storage), Alamofire, Swagger, Realm AI: ChatGPT API, Apple Intelligence, Google Gemini Analytics: Google Analytics, Firebase Crashlytics, Google Tag Manager Maps: Google Maps, Apple Maps Social integrations: Firebase Auth, Facebook, VK, Instagram Subscriptions & Paywalls: StoreKit 1, StoreKit 2, RevenueCat Version control: GitHub, GitLab, Bitbucket Other: APNs, StoreKit, Firebase Messaging, Photoshop, Figma, Postman

I am a dedicated Android developer with over 9 years of experience designing and building mobile applications. I specialize in using Java, Kotlin, Jetpack Compose, and the Android SDK to create apps that are not only functional but also visually appealing and user-friendly. Key Strengths: Expert in Android Development: Proficient in the latest technologies, ensuring apps are modern, responsive, and robust. Problem Solver: Skilled in identifying and resolving complex issues, and optimizing code for performance and efficiency. API Integration Specialist: Seamless integration of APIs to enhance app capabilities, from payment systems to social logins. Agile Development: Experienced in working within Agile teams, ensuring smooth collaboration and timely project delivery. I am passionate about turning ideas into high-quality Android apps that drive results. Let’s connect and bring your project vision to life!

Hi! My name is Aleksa and I help businesses by providing consultation and development services for their iOS and Android apps. 𝐈 𝐖𝐎𝐑𝐊 𝐖𝐈𝐓𝐇 • Businesses and enterprise companies • Self-employed service providers 𝐖𝐇𝐀𝐓 𝐈 𝐎𝐅𝐅𝐄𝐑 𝐅𝐎𝐑 𝐁𝐔𝐒𝐈𝐍𝐄𝐒𝐒𝐄𝐒 𝐀𝐍𝐃 𝐒𝐄𝐋𝐅-𝐄𝐌𝐏𝐋𝐎𝐘𝐄𝐃 • Consultations regarding your iOS and Android app • Development for your iOS and Android app • Building an MVP mobile app for you from scratch in just one month • If you already have a team, but you need team extension, I cover that also 𝐑𝐄𝐀𝐒𝐎𝐍𝐒 𝐓𝐎 𝐖𝐎𝐑𝐊 𝐖𝐈𝐓𝐇 𝐌𝐄 • 26 apps successfully created and shipped to AppStore and PlayStore • Helped over 30 clients with team extension for their iOS/Android services 𝐅𝐀𝐕𝐎𝐑𝐈𝐓𝐄 𝐂𝐋𝐈𝐄𝐍𝐓𝐒 𝐐𝐔𝐎𝐓𝐄𝐒 "Aleksa's performance has been outstanding since he was always working self-responsibly, quickly, flexibly and reliably." "Aleksa is not afraid of asking questions and proposing solutions. He's a very good team player and really nice person. It's the type of person that every startup needs." "Working with Aleksa was pure pleasure. He helped us bring our iOS MVP application to life while constantly providing valuable ideas on how we can further improve our product." 𝐇𝐚𝐯𝐞 𝐚 𝐩𝐫𝐨𝐣𝐞𝐜𝐭 𝐢𝐧 𝐦𝐢𝐧𝐝? 𝐃𝐫𝐨𝐩 𝐦𝐞 𝐚 𝐦𝐞𝐬𝐬𝐚𝐠𝐞 𝐭𝐨 𝐠𝐞𝐭 𝐬𝐭𝐚𝐫𝐭𝐞𝐝! 🚀

Founder, full-stack & AI engineer with 12 apps live on the App Store, 4,000+ users, and a Top Rated profile with 100% Job Success. I'm not just a developer for hire. I build, ship, and operate my own AI-powered products end to end, and I bring that same founder-level ownership to every client project. From fintech platforms with real bank connections to AI-powered wellness, health, and productivity apps, I design the user experience, engineer the backend, integrate the AI, implement monetization, and take products all the way to launch, App Store or web. What I bring to your project: ⌁ AI Engineering Production AI, not demos: multi-model systems across OpenAI, Claude, and Gemini with cost-tiered model routing, agent pipelines, and vision, voice, and reasoning features grounded in real user data, engineered for reliability, latency, and cost. ⌁ Full-Stack Development I build the entire system, includth FastAPI and PostgreSQL, as well as Firebase and Supabase for authreal-time synchronization, and server-side logic, plus Next.js hboards. ⌁ iOS & Apple Ecosystem Modern, modular Swift & SwiftUI (rk, Swift Concurrency) withpixel-perfect, first-party-qualiteMotion and AirPods sensor data,FamilyControls and Screen Time APs, Apple Watch, and macOS. ⌁ Fintech & Monetization Experience with Plaid integration2 subscriptions, and RevenueCat paywalls, with secure token manag ⌁ Security-First Engineering Hardened authentication flows, sege, and a clean App Store submission history with zero secuing I've shipped. Clients consistently highlight th • Translate complex product ideasiences. • Deliver quickly without sacrifi • Communicate clearly, set realis ownership of delivery. I approach every engagement as a task executor because I thinkabout your users, conversions, anof care I bring to my ownproducts.

Over 8 years of global development success on the iOS platform with strong expertise in both Swift and Objective-C for iPhone, iPad, and Apple Watch. Dedicated Software Engineer with comprehensive experience in the Research and Development field. My academic background is M.Sc. of Software engineering. Extensive knowledge in job automation, technical writing. Adept at solving complicated problems, even if they are out of the boundaries of my current knowledge. I perform each project to the fullest of my capabilities and with the dedication that is expected of a professional as myself. I have maintained 100% customer satisfaction and repeat business by truly caring about my client's products, budget, and communication needs. I am passionate about mobile development and that always comes across in the quality of my work. Strong technology and business experience combine for strong project outcomes no matter the size. I welcome discussing your projects and what we can do together to ensure success!

The last five years I spent working for Upwork itself as Sr. iOS Developer, developing its iOS app. I’ve been writing iOS applications for more than 10 years. I enjoy creating great software with user friendly UI. At every project I pay special attention on design, architecture, code support. I have professional knowledge of development in most of iOS Frameworks in all iOS layers. I’m responsible and focused on goals. Always trying to finish every project I work on. I graduated from Moscow State University of Economics Statistics and Informatics in 2009 as a mathematician and programmer. Several years I spent working in J2EE field, after that I started working as iOS developer. Several finished projects on the AppStore: Upwork, BoardMaps, Plain flashcards, Avtodor, QTickets. The first three are written in swift. I always try to find time to learn something new, I follow several projects on Github (my github profile - sidslog). Sometimes I participate in discussion on StackOverflow. I try to visit as many conference as I can or watch videos from this conference (WWDC is my favorite).