Hire the Best Kotlin Developers
in Portugal

“Opportunities don't happen, you create them. like that I created your App." If you have a business and you want it to grow or you have an idea and you want it to become a reality, then I will help you to create an App that match your needs and promote your work. I'm Babak, a deft Software Developer in creating modern and interactive apps using Any framework you need, I can submit complete apps or work from a rough idea. Investing my experience and knowledge to achieve the best results, an in-depth study of customer and user needs allows me to develop sustainable solutions to meet your business goals. Why Me? I understand your requirements, and provide high quality work at a very reasonable cost. Your success and happiness is my achievement. I always look forward to learning new technologies and developing my skills in this field. I have more than 8 years experience in software mobile developing. I am fluent on multiplatform frameworks like flutter and native side like Kotlin and java. 🌟🌟 𝐈 𝐚𝐦 𝐞𝐱𝐩𝐞𝐫𝐢𝐞𝐧𝐜𝐞𝐝 𝐢𝐧 𝐟𝐨𝐥𝐥𝐨𝐰𝐢𝐧𝐠𝐬 🌟🌟 ✅ Flutter ✅ Dart ✅ Kotlin ✅ Java ✅ C# ✅ React ✅ Java Script ✅ Python ✅ Firebase ✅ GIT, GIT Flow ✅ Google APIs ✅ RESTful APIs ✅ Animation, Rive ✅ Responsive UI ✅ Local databases, like : SQL, SQLite, SQFLite, Hive, etc ✅ State management like : Provider, Bloc, RiverPod, Get_x ✅ Background services, Alarm Manager, Work Manager 🌟 Some apps that you can find in my portfolio: ✔ Messenger ✔ Amreton ✔ Houston Cox ✔ Palaver ✔ FastFoo ✔ Sound stream ✔ Real Estate ✔ Online Shop ✔ Behsazan Shop ✔ Daily TimeSheet ✔ Forex Tutorial If you want to create an application with high efficiency and quality, do not hesitate to contact me, your project will be completed successfully. Hire me for the best app you will ever see that makes your dreams and ideas come true. ✉️ Waiting your DM to discuss more to reach high quality results together. Best, Babak

I’m a senior software developer from Portugal with more than 20 years of experience building commercial desktop and mobile applications. I help teams build, stabilize, refactor, and extend products that involve real technical complexity. My work is focused on desktop and mobile software where senior technical judgment matters: Qt/C++ applications, native iOS and Android apps, performance-sensitive features, media and audio/video pipelines, computer vision, hardware integration, OS-level behavior, and long-term maintainability. I have worked on commercial products used by real customers, including projects such as Rocketbook - Document Scanning, Triller - Music Video Social Network, ROVR Radio - Audio Production & Dashboard, Toby - AI Real-Time Audio Translation, iContact - Camera Widget, VideoShop - Video Composition, iGreet - Augmented Reality Greeting Cards, LeanStreamer - Multiple Audio Encoding Streaming Tool, BigRoom - Automated AI Editor, and other desktop and mobile applications that required reliable implementation and careful technical decision-making. Clients usually hire me when they need help with: • building a desktop or mobile product properly from the ground up • refactoring an existing codebase without unnecessary rewrite risk • solving platform-specific issues that are blocking progress or release • implementing complex native features involving camera, audio, video, files, hardware, or OS APIs • improving architecture, maintainability, performance, and stability • adding senior technical depth to an existing team or codebase My core expertise includes Qt/C++, desktop software, native iOS and Android development, software architecture, refactoring, performance optimization, media processing, computer vision, and hardware or platform-level integration. I’m especially well suited for products that already exist and now need to be improved carefully. That may mean stabilizing a codebase, modernizing architecture, solving difficult technical issues, or extending the product in a way that remains clean and maintainable. I care about building the right foundation early, keeping the codebase understandable, and making technical decisions that still make sense in the long run. If your product already exists and needs senior technical help to move forward safely, I’d be glad to discuss it.

I build high-performance mobile and web applications that scale — from early-stage MVPs to enterprise-grade platforms. With 10+ years of hands-on experience across Flutter, iOS (Swift), Android (Kotlin), React Native, and full-stack backends, I've helped startups, scale-ups, and enterprises ship products users love. Whether you need a cross-platform mobile app, an AI-powered SaaS product, a real-time streaming platform, or a scalable backend, I deliver clean, maintainable code with clear communication throughout. ━━━━━━━━━━━━━━━━━━━━━━━━ ✅ WHAT I BUILD ━━━━━━━━━━━━━━━━━━━━━━━━ → Mobile Apps (Flutter, iOS, Android, React Native) → AI-Powered Apps (GPT-4/5, Claude AI, OpenAI API, Chatbots) → SaaS & Subscription Platforms (Multi-tenant, billing, admin) → Real-Time Video & Live Streaming Apps (WebRTC, Agora, Twilio) → On-Demand Apps (Taxi, Food Delivery, Booking, Marketplace) → E-Commerce & Marketplace Platforms → E-Learning & EdTech Applications → IoT & BLE-Based Mobile Apps → No-Code / Low-Code (Bubble, FlutterFlow, Webflow) ━━━━━━━━━━━━━━━━━━━━━━━━ 🛠 TECH STACK ━━━━━━━━━━━━━━━━━━━━━━━━ Mobile: Flutter · Swift · Kotlin · React Native Backend: Node.js · NestJS · Laravel · Express · Firebase Frontend: React.js · Next.js · Angular Databases: MySQL · MongoDB · PostgreSQL · DynamoDB · Firestore Cloud: AWS (Lambda, API Gateway) · Firebase · GCP Payments: Stripe · PayPal · Razorpay · Braintree Real-Time: Socket. IO · WebRTC · Twilio · Firebase RTDB Maps: Google Maps · Apple MapKit · GPS Tracking ━━━━━━━━━━━━━━━━━━━━━━━━ 🎯 WHY CLIENTS CHOOSE ME ━━━━━━━━━━━━━━━━━━━━━━━━ ✔ Full ownership & IP rights from day one (your GitHub, your code) ✔ App Store & Google Play deployment handled end-to-end ✔ 6 months free post-launch maintenance ✔ Agile/Scrum process with regular updates & demos ✔ Strict adherence to Apple & Google guidelines ✔ Free 15–30 min consultation before any engagement Let's talk about your project. Message me today.

I am a software engineer with 10 years of experience in software development using J2EE and FE technologies. I have a background in building web services, scalable architectures, cloud technologies, and data management. Core experience: • Web Services, Microservices, REST APIs • Agile Scalable Architectures, High Load Systems, Cloud Technologies, Data Management • Java Performance optimization, Bottlenecks, Concurrency and Multithreading • Front-End, Mobile Application and Desktop Development • Agile Development, CI/CD practices, Security Compliance and more Key skills: • Java · Kotlin · Concurrency & Multithreading · JVM & GC tuning • Spring Framework · RESTful API · Security & OAuth 2.0 · SSL · DNS • Micro services · DigitalOcean · AWS · ActiveMQ · Kafka · RabbitMQ • AI, MCP, prompt engineering • MySQL · PostgreSQL · Oracle · MongoDB · Redis · Hibernate · CRUD & POJO • JS/TS · React · Angular · jQuery · Bootstrap · Thymeleaf · Websockets · SPA · Node.js · Vue.js • RCP · OSGi · EMF · Cross-Platform Apps · SWT • Financial Protocols: FIX, FIX 4.2, FIX 5.0, Arrowhead, Swift I’m proactive and self-motivated developer, energetic and driven by engineering challenges which add maximum value to company and users. I will gladly be a part of a professional team that values honesty and good-natured communication

I've been working as an iOS Developer for 14 years. Experienced in both Swift and Objective-C, I have developed apps for the iPhone, iPad, Apple Watch and Apple TV. I've worked on Android too, both Java and Kotlin. I have submitted many apps to the App Store, with complex interfaces, extensive web service communication, and multimedia content. Some of these apps got good references in the press, and one of them, Back in Time, was selected by The New York Times as one of the Top 10 iPad apps of the year.

I’m a Unity developer working with C#, mainly focused on gameplay systems like abilities, progression, UI, and core game logic. I’ve built features from scratch and also worked inside existing projects, so I’m comfortable both creating systems and improving what’s already there. I’ve worked on multiplayer and system-heavy features, and I care a lot about making things feel smooth, responsive, and easy to iterate on. I also use tools like ChatGPT and Claude to speed up development when it makes sense, while keeping everything clean and properly structured. If you need help building or refining gameplay systems, feel free to reach out.