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🤝 With my solid experience of 15 years in GIS 🌎(Google Maps, Leaflet, Mapbox, and ArcGIS) and Full stack development, I helped SMBs, startups, and corporations to level up their business and increase ROI by 30%! I combine strong frontend and backend skills with deep GIS expertise to deliver modern, scalable, and results-driven solutions across industries like: - healthcare transportation ( NEMT ) 🚑 - logistics 🚍 - real-estate 🏡 - environment & ecotech🌳and beyond My achievements: 🔥 13300+ worked hours 🔥 120+ completed milestones 🔥 90+ completed jobs 💲 55+ happy clients 💪 My extensive experience in GIS | GIS mapping | Logistics management and Web development would allow you to get your solution quicker and with higher quality than by using 90% of other developers. 🤝 I`m here to help you grow your business. Let's have a chat or call to clarify your problems and goals! I’m available from 10:00 to 19:00 (GMT+2). My skills: ⇢ General: GIS developer | Web app developer | GIS developer | Interactive Map Visualization, Mapping app, Solving Vehicle Routing Problems, Algorithm Development, Data Scraping, GIS Mapping Data, Interactive Data Visualization, AWS Services, GIS specialist, API Integration, GIS mapping, GIS analyst, AI, OpenCV, ML ⇢ Front End: GIS Web | Web developer | JavaScript, Vue.js, Node.js, Angular; ⇢ Map Visualisation: GIS Mapping, Mapbox | Leaflet, OSRM, OpenLayers, Google Maps API | ArcGIS map API | Map Illustrator Map Illustration ⇢ Back End: Web app | GIS Python | C#, PHP, Laravel | Code Igniter, Google Maps Services, OSRM, Tileserver-GL, Osmium ⇢ Databases: PostgreSQL, MySQL, GPS Data Storage ⇢ Platform: Web and Mobile developer, GIS developer ⇢ Logistics: Logistics Management | Transportation & Warehousing | Supply Chain Management | Inventory Management | Supply Chain & Logistics | Data Entry My experience: Transportation & Healthcare: ◼️ 🌎 GIS developer : ⇢ Interactive GIS Mapping, Mapbox, Google Maps, ArcGIS, Vue.js, PHP, Laravel, ⇢ 🧠 Optimization and automatization of trip routing scheduling (Dial-a-Ride Problem (DARP)) ⇢ Cost minimization of using Google Maps geocode and routing services ⇢ Calculation of ETA trucking ⇢ Collecting fleet vehicle locations from several providers ⇢ Displaying a map with PickUp and DropOff locations of the trips ⇢ Displaying variants of routes and selecting the best by cost ⇢ Displaying a route from vehicle to Pickup/Dropoff ⇢ Web mapping application development ⇢ ✔ Tech stack: JavaScript, GIS developer, API, CSS, HTML, ArcGIS, PHP, API Integration GIS developer ◼️ Common: ⇢ 💪🏽 Implementation of the architecture of the management system for medical transportation of NEMT (Non-Emergency Medical Transportation) trips ⇢ Implementation of RESTful API ⇢ Implementation of trip reservations and monitoring of execution ⇢ Automatization of trip reservations (from files, email, FTP, etc.) ⇢ Implementation of trips marketplaces and bidding ⇢ 💲 Billing system using EDI (837, 835) ⇢ Payment system reports (EOP) ⇢ API integration with different software providers for updating trip statuses and monitoring trips performing ⇢ Protection of personal, confidential, and health information (HIPAA compliance, PII, PCI) Real Estate: ◼️ 🌎 GIS developer ⇢ Generation reports with geodata ⇢ Scraping, processing, and analysis of geodata ⇢ Implementation of the management system for a large number of geodata sources ⇢ API with geospatial filters ⇢ Automatic calculation of frontages ⇢ Displaying of polygons and polylines ( cadastral data, zones, areas, etc.) ⇢ Displaying different layers with different styles on the map ⇢ Report generation using geospatial analysis, export to PDF ⇢ GIS mapping ◼️ Common: ⇢ User management system ⇢ Payment system (Stripe) ⇢ Promo codes system ⇢ Affiliate system ⇢ Web application with map development ⇢ Tech stack: JavaScript | Python | Python full stack | GIS | API | CSS | HTML | ArcGIS | GIS developer GIS specialist Mapbox Other experience: ✔ Servers for the representation of geodata with different filters using Node.js and ASP.NET ✔ Implementation of the library for converting different geo-data formats ✔ Implementation of ArcGIS (ArcMap, ArcCatalog) tools ✔ Implementation of GIS framework for working with geospatial data ✔ Implementation of a very fast Polygon library for working with 10 million polygons ✔ Mapbox developer ✔ Web mapping application developer ✔ Mobile application developer ✔ Interactive Map Development ✔ Full stack GIS Developer | Mapbox, Google Maps ✔ GIS developer ✔ GIS Specialist ✔ GIS mapping ✔ Web Development | GIS developer | ArcGIS | PostGIS | QGIS | Mapbox | Google | ✔ Freight ✔ ETA Trucking ✔ Dispatch ✔ Transportation ✔ Warehouse Management ✔ Trucking logistics ✔ Logistics supply chain ✔ Logistics management ✔ TMS software ✔ Supply chain management ✔ NEMT

🤝 I can improve your thoughts and create for you expert advisors (EAs, bots), indicators and scripts for the MetaTrader 4, MetaTrader 5 using MQL4, MQL5. Automating your strategies, for more convenient trading, and for testing your trading strategies. Developing automated trading systems, custom technical indicators, and trading scripts for trading and analyzing Forex, and various financial markets. This saves you time and allows you to make your trade more profitable. Using my experience in trading and programming (since 2014), I help other traders implement and test their trading ideas. Also, I have experience trading Forex since 2011, which allows me to better understand the needs of traders and provide a better service. Customer services I offer: - MQL4 & MQL5 Programming; - source code providing; - clean coding (self-explanatory); - reliable programming; - quick turnaround; - long support; - if required, I will sign NDA. Thanks to my knowledge and experience, as well as the fact that I like doing what I do – you can entrust me with your projects and I will always complete your project perfectly and on time! If you have any questions – help and support your product in the future. Together we will make your trade profitable. I work and help people who are just starting trading, beginners and professional traders, investment advisors, and portfolio managers. 🤝 I am always glad to have long-term partnerships.

$𝟑𝟎𝐊+ 𝐢𝐧 𝐂𝐥𝐢𝐞𝐧𝐭 𝐑𝐞𝐯𝐞𝐧𝐮𝐞 | 𝟑𝟎+ 𝐏𝐫𝐨𝐣𝐞𝐜𝐭𝐬 | 𝟏𝟎𝟎% 𝐂𝐥𝐢𝐞𝐧𝐭 𝐒𝐚𝐭𝐢𝐬𝐟𝐚𝐜𝐭𝐢𝐨𝐧 My goal is simple - your mobile app should be stable, scalable, and valuable for your business. I’m Olha, a Mobile App Developer specializing in native iOS and Android development with Swift, SwiftUI, Kotlin, and Java. I help startups, SaaS companies, healthcare products, fintech platforms, logistics businesses, streaming services, and enterprise teams build mobile applications that are ready for real users. Whether you need an MVP, a new mobile app from scratch, improvements to an existing iOS or Android app, or long-term mobile development support I can help you move from idea to launch with clean native development. ✔️ Mobile App Developer — full-cycle mobile app development from idea, architecture, and development to App Store and Google Play release. ✔️ iOS Developer — native iOS apps built with Swift, SwiftUI, Objective-C, Apple frameworks, and scalable architecture. ✔️ Android Developer — native Android apps built with Kotlin, Java, Android Studio, Google SDKs, and clean maintainable code. ✔️ Native iOS & Android Development — stable, fast, and user-friendly mobile apps without unnecessary cross-platform complexity. ✔️ Long-Term Mobile Development Partner — support, maintenance, new features, performance optimization, and product scaling after launch. 🔥 ACHIEVEMENTS ✔️ 8+ years of experience as a Mobile App Developer building native iOS and Android applications across multiple industries. ✔️ 30+ mobile app development projects delivered for startups, SaaS, healthcare, fintech, logistics, streaming, wellness, and enterprise products. ✔️ $30K+ in client revenue supported through mobile app development, product improvements, and long-term development cooperation. ✔️ Native mobile apps built for products with 2M+ downloads, 500K+ users, and high daily engagement. ✔️ iOS and Android applications delivered for logistics platforms operating across 60+ cities. ✔️ Mobile app development for AI-powered platforms, fintech products, wearable apps, booking systems, delivery apps, and streaming solutions. ✔️ Strong experience improving existing iOS and Android apps through performance optimization, UI/UX improvements, bug fixing, and feature development. 🚚 WHERE I DELIVER ✔️ As a Mobile App Developer — I build mobile applications from MVP to production-ready product, including architecture, development, integrations, testing, deployment, and maintenance. ✔️ As an iOS Developer — I deliver native iOS apps for iPhone, iPad, Apple Watch, and Apple ecosystem products using Swift, SwiftUI, and Objective-C. ✔️ As an Android Developer — I deliver native Android apps for smartphones, tablets, WearOS devices, and Android-based ecosystems using Kotlin and Java. ✔️ As a Native Mobile App Developer — I work with Firebase, AWS, REST APIs, GraphQL, push notifications, subscriptions, analytics, payments, and real-time features. ✔️ As a long-term development partner — I help improve existing mobile apps, reduce technical debt, optimize performance, and add new features without breaking the product. 🏆 INDUSTRY IMPACT ✔️ Healthcare & Wellness Apps — native iOS and Android development for wellness platforms, healthcare tools, wearable integrations, biometric data, and user activity tracking. ✔️ Fintech Mobile Apps — secure payment flows, Stripe and PayPal integrations, Apple Wallet features, subscription systems, and financial dashboards. ✔️ Logistics & GPS Apps — GPS tracking, geofencing, delivery tracking, real-time location updates, driver apps, and logistics management tools. ✔️ Streaming & IPTV Apps — IPTV applications, OTT platforms, FireTV apps, video playback optimization, and low-latency streaming features. ✔️ Wearables & IoT Apps — Apple Watch, WearOS, BLE devices, IoT sensors, smart devices, and biometric integrations. ✔️ AI-Powered Mobile Apps — AI productivity apps, AI wellness platforms, LLM integrations, real-time analytics, and AI-powered user experiences. ✔️ Booking, Delivery & Marketplace Apps — mobile products with user profiles, payments, notifications, dashboards, real-time updates, and scalable app architecture. ⚒️ HOW I BUILD ✔️ iOS Development: Swift, SwiftUI, Objective-C, Xcode, Apple frameworks, Apple Watch, Apple Wallet, App Store deployment. ✔️ Android Development: Kotlin, Java, Android Studio, Google SDKs, WearOS, Google Play deployment, Android architecture. ✔️ Mobile App Development Stack: Firebase, AWS, REST APIs, GraphQL, push notifications, subscriptions, payments, analytics, dashboards, real-time tracking. ✔️ Product Development: MVP development, startup mobile app development, enterprise mobile apps, UI/UX optimization, performance improvements, feature development. ✔️ Architecture & Workflow: clean architecture, scalable codebase, CI/CD, Agile workflow, code review, app maintenance, long-term support.

📌 About Me: ⠀⠀✔ Experience: 12 years in mobile development. ⠀⠀✔ Native and cross-platform apps development. ⠀⠀✔ Technological stack: Java, Kotlin, Dart(Flutter), KMP, Android SDK, MVVM, Android Studio, Jetpack Compose, Clean Architecture, Firebase, Coroutines, RxJava2, Retrofit, Firebase, Git, Jira. ⠀⠀✔ Experience with Databases: SQLite, Room. ⠀⠀✔ Experience in Custom Android devices development, such as Zebra devices, Nordic Semiconductor boards, IoT. ⠀⠀✔ Area of expertise: Healthcare, E-commerce, FinTech, Logistics, Car Rent, Social Networks. ⠀⠀✔ Development from scratch / working with existing codebases.

Full stack developer | Expert-Vetted on Upwork (top 1% of talent) 10 years of experience I turn ideas into real applications your users can depend on Recent work: → Product Architect at Upwork, leading a team of engineers within Upwork's Engineering Talent Cloud → Led frontend for Autobound's AI sales automation platform (Vue.js/Nuxt + Chrome extension + micro-frontends) → Built full stack for Augmento's AR/VR product used by brands and real estate developers → Migrated DriverHRIS — 1,000+ screens from Vue 2/.NET to Vue 3 + Node.js microservices → Rebuilt Wawibox (German dental marketplace) — full Nuxt 2 → Nuxt 3 SSR migration Across all of it, I focus on understanding the business goal before designing the technical approach — what the feature is really for, what breaks if it ships wrong, what your user actually needs. I also co-founded Softonix, a 25-engineer Vue.js | Node agency in Lviv — so if your project grows past one developer, I can scale the team without handing you off to strangers. Want to scope something? Let's talk — I usually reply within a few hours. 🚀 SEO section Most of my engagements are full stack developer saas builds — MVP to scale. i take Full stack developer fintech work with strict compliance, full stack developer ecommerce platforms with heavy inventory and checkout logic, full stack developer healthcare applications, full stack developer marketplace work, and full stack developer crm integrations tying CRMs to product data. Recent AI work includes full stack developer llm features (OpenAI, Gemini, Vellum) and full stack developer ai prototypes that survive first traffic. Plus full stack developer twilio integrations for SMS and voice. Tech stack: Beyond Vue/Nuxt/Node.js, I take on full stack developer laravel engagements when I inherit PHP codebases, full stack developer shopify theme and app builds, full stack developer webflow projects with custom CMS logic, full stack developer supabase work on modern products, and general full stack web developer engagements. I handle .net full stack developer migrations. I also do python full stack developer work — python full stack developer flask for lightweight services, python full stack developer django when a team wants batteries included. I'll act as the web developer owning end-to-end page experience, the react developer handling component architecture and state, the wordpress developer when the marketing surface lives there, and the mobile app developer extending into React Native when needed. covering web developer work, react developer work, wordpress developer work, and mobile app developer work saves them two or three hires a year. I ship as a web developer, react developer, wordpress developer, or mobile app developer depending on what the sprint needs. Frontend stack: React — React hooks, Next.js patterns, component systems. Vue.js and Nuxt.js are my home turf. I still reach for Angular or jQuery on legacy codebases. On markup and styling: HTML5, HTML, CSS 3, CSS, Tailwind CSS, Bootstrap, and whatever Front-End Development Framework a team has standardized on. JavaScript is the connective tissue. Backend, data, infrastructure: Node.js with Fastify, Express, and Nest for most new work. PHP with Laravel when I inherit it, CodeIgniter when a legacy system needs careful migration. Back-End Development Framework choices are tools picked for the problem. Python where it fits. On data: SQL, MySQL, Database Architecture from day one, clean API design, API Integration across third-party services. Platforms & applications: I ship Web Application, Desktop Application, and Standalone Application builds depending on distribution model. Deep experience with WordPress and Shopify. Adobe Photoshop for brand-polish work when it's needed. How I work: Software Design up front, then the build. Software Architecture & Design written down before the first line of code, so Full-Stack Development stays coherent as the project scales. I take Software Testing seriously, Software Debugging before ship not after, and Application Improvement plus Software Consultation. Agile Software Development means daily Git commits, Web Design reviews that respect the brand, and Software Development delivered the way seniors do it — quietly, predictably, without drama. Full Stack Developer engagement I take. Whether the ask is framed as "I need a Full Stack Developer for three weeks" or "I need a Full Stack Developer to embed long-term with my team," the first conversation is about your business goal. I am web developer mobile angular and full stack developer laravel vue or nuxt.js app blockchain development are in my portfolio along with c# projects available below I`m blockchain developer React also I work as a .NET backend developer and web developer in some cases I am mobile app developer or wordpress developer but always web developer or javascript architect with Vue or vue.js or nuxt

🚀 My name is Artem, Co Founder and CTO of JoinToIT. I am a Full Stack Developer with more than 12 years of experience building SaaS platforms, AI powered systems, and complex web applications. 💻 As a Full Stack Developer I have participated in more than 1000 successful projects for startups, SaaS companies, and enterprise platforms worldwide. ⚡ If you need a reliable Full Stack Developer who can design architecture, build scalable systems, and integrate AI or APIs into your product, feel free to contact me. I lead JoinToIT, a software development company with nearly 80 engineers including senior Full Stack Developer specialists, web developer experts, react developer engineers, wordpress developer professionals, and mobile app developer teams. Every Full Stack Developer on our team focuses on scalable architecture, business logic, and long term platform growth. Over the past decade I have worked as a Full Stack Developer building SaaS platforms, CRM systems, marketplaces, enterprise dashboards, and AI powered automation tools. Many companies hire me as a full stack developer saas when they need to build a product from idea to production with reliable architecture. Our engineers regularly work as full stack developer laravel and full stack developer php specialists building secure APIs, payment systems, and large scale SaaS platforms used by thousands of users. As a full stack developer crm I have helped companies automate sales pipelines, distribution management, and customer lifecycle platforms used by teams of 100+ employees. On the frontend side we work as full stack developer react engineers building scalable SaaS dashboards and modern web interfaces. Our developers also deliver projects as full stack developer react node building high performance web applications and API ecosystems. We also build real time systems as full stack developer react firebase engineers including authentication platforms, messaging systems, and live dashboards. For modern SaaS stacks, we also work as full stack developer supabase react engineers building scalable backend infrastructure and cloud native systems. Companies building AI driven products often hire us as full stack developer javascript saas ia or full stack ai saas developer teams to integrate OpenAI, Claude, and automation workflows into SaaS platforms. Beyond SaaS platforms we also operate as full stack web developer teams delivering scalable web applications, internal platforms, and marketplace systems. Our backend engineers work as python full stack developer flask and python full stack developer django specialists building scalable APIs, automation platforms, and data driven systems. Many companies hire us simply as python full stack developer experts when they need robust backend architecture. With more than 12 years of experience as a Full Stack Developer I have helped launch more than 100 SaaS platforms, 70 AI integrations, and 50 CRM systems used by companies worldwide. Our platforms support thousands of daily users and process millions of API requests every month. Our teams also work as web developer and react developer specialists building high performance user interfaces and SaaS dashboards. Some companies hire us as wordpress developer experts for custom plugin development and integrations. When projects require cross platform products our engineers also work as mobile app developer teams delivering mobile applications connected to backend SaaS systems. My skills: JavaScript React Web Application Web Development Software Architecture & Design Full-Stack Development Database Architecture PHP Python Node.js API API Integration WordPress PostgreSQL Web Design HTML5 Git Laravel MySQL Tailwind CSS Our technical expertise includes PHP, JavaScript, Python, React, Laravel, Node.js, Supabase, Firebase, Django, Flask, PostgreSQL, MySQL, WordPress development, Web Development, Full Stack development and modern AI APIs such as OpenAI and Claude. Whether you need a Full Stack Developer to build a SaaS product, an AI powered platform, a CRM system, or a scalable web application, my team and I are ready to help turn your idea into a production ready platform. Best regards Artem Chernitsov CTO, JoinToIT