Max O.Private profile: Upwork shows its earnings only to signed-in members, so we check it every few weeks, not daily. MRR here is a rough estimate (Upwork's six-month earnings ÷ months active). Last read Nov 5, 2026.

I am a Cross-Platform Mobile App Developer, (Android & iOS) with about 8 years of professional experience. During this time, I have contributed to the development of mid-scale and large-scale apps, including apps for the EV Charging, Healthcare, Gambling, Food Ordering industry. On all of those projects, I worked with Flutter and Dart, so I have extensive experience with this framework. Before I started my programming career, I used to work as a 2D/3D Generalist, and this experience helps me create not only fully functional but also user-friendly and appealing apps with sleek interface and seamless user flow. So if you are looking for a Mobile Developer with a keen eye for design – I am here for you! Invite me for an interview if you need a sleek cost-effective mobile app for Android and iOS. TECH STACK ✅ PROGRAMMING LANGUAGES, SDKs: Dart, Java ✅ FRAMEWORKS: Flutter ✅ DATABASES: SQLite, MySQL ✅ TESTING: JUnit ✅ BUILD TOOLS: Maven, Gradle ✅ APIs: Google Maps API In addition to the above, I have hands-on CI/CD experience. PORTFOLIO Recently, I took part in the development of the following cross-platform apps: ✅ Application for EV charging: Cross-platform mobile application for registration in the service of charging stations and control of car charging. ✅ Food delivery service for the Brazilian market: cross-platform mobile application for deliverymen to keep track of the food delivery orders, choose the nearest orders on the map, manage the routes and change the order statuses. ✅Cross-platform Worker App: The application assisted users in finding and employing professionals to take care of household chores as well as post rating of an employee and leaving feedback about the work done. ✅VinDecoder: Online vehicles catalog for searching by VIN. ✅ Cross-platform (Android, iOS) mobile application for football fans with a Social Network functionality. ✅ Mobile financial application for one of the top 3 Ukrainian retailer chains. ✅ Gas & Oil app that allows technicians to see the list of work orders assigned to them, determine locations on the map, fill out the inspection form, and submit the result of an inspection. I put my hand into the development of the architecture of the above-mentioned apps, along with implementing the advanced UI/UX design for them. LANGUAGES I SPEAK Ukrainian is my native language. Besides, I have strong English skills. Most of my previous customers were English-speaking, so I am comfortable communicating in English. MY TEAM I am at ease as an individual contributor, but being a team player works best for me. So I joined Extrawest — an Upwork Top Rated Agency specializing in FinTech and Banking, Gambling and Betting, Food Ordering and Delivery, Logistics and Fleet Management, Medical Insurance and Healthcare, and special software for Electric Vehicles Charging Station networks since 2006. Having most of our resources based in Europe, we’ve been working with customers from over 20 countries (the US, Canada, Australia, most of the EU, South Africa, Singapore, Japan). Hence, it won’t be a problem for us to adjust to your timezone and working schedule. INVITE ME FOR AN INTERVIEW If you feel I’m a perfect match for your project, invite me, and let’s streamline your business’s growth! 🟩 🟩 🟩 🟩 My Agency Skills: Front-End (Frontend) Development, Back-End (Backend) Development, Full-Stack (Fullstack) Development, Mobile Development, EV Charging, Automotive, Logistics, Delivery, Food Ordering, FinTech, Banking, Healthcare, Insurance, Betting, Gambling, Data Scraping, Flutter, Dart, JavaScript (JS), TypeScript (TS), Angular, Vue.js (VueJS, Vue), React.js (ReactJS, React), Node.js (NodeJS, Node), Java, Spring, SpringBoot, Hibernate, Python, Django, Scrapy, Quality Assurance (QA), Manual Testing, Automated Testing, Selenium, UI/UX Design, User Interface (UI), User Experience (UX), Figma, Adobe Creative Cloud, DevOps, MySQL, PostgreSQL, MongoDB, Firebase, REST API, FastAPI, Docker, Amazon Web Services (AWS), Google Cloud Platform (GCP), Project Management (PM).