Hire the Best Kotlin Developers
in Australia

I help founders and businesses build, fix and launch mobile apps, SaaS platforms and web applications. A lot of my work involves taking over existing projects, improving unstable apps, cleaning up prototypes, and getting products ready for real users. I am comfortable working with non-technical founders, small businesses and teams that need clear communication, practical advice and reliable delivery. My background is a mix of software, payments and real business operations. I founded and developed Festival Currency, a live transaction platform used at events and festivals that processed over $30M in payments across mobile devices, QR workflows, RFID systems and unreliable network environments. I also spent nearly 30 years running a major technology retail store in Australia, managing 40+ staff and dealing with tens of thousands of customers over that time. That experience gives me a practical understanding of how software is used in the real world: staff workflows, customer service, stock, payments, reporting, warranties, operations and the pressure of systems that need to work while a business is running. I can help with: • Building Flutter apps for iOS and Android • Developing Laravel backends, APIs and admin dashboards • Building React and Next.js web apps • Fixing and improving existing mobile apps and SaaS platforms • Turning prototypes into production-ready systems • Reviewing Supabase, Firebase, Stripe and app security before launch • Integrating Stripe, Stripe Connect, subscriptions and payment flows • Improving onboarding, authentication, booking and workflow logic • Building customer portals, staff tools and operational dashboards • Cleaning up overcomplicated systems before release I regularly work on: • Mobile apps and MVPs • SaaS platforms • Booking and scheduling systems • Payment and subscription systems • QR code and scanning workflows • Customer portals and admin dashboards • Retail, POS, inventory and operational systems • AI-assisted, Cursor, Lovable, Base44, Replit and prototype-based projects • Operational apps used by staff, customers or field teams I am not just a code-only developer. I help think through the product, identify risks, simplify the build and explain technical decisions in plain English. Tech stack: Flutter, Dart, Laravel, PHP, React, Next.js, JavaScript, Node.js, Mern, PostgreSQL, MySQL, Stripe, Stripe Connect, Firebase, Supabase, AWS, Cloudflare, Vercel, Digital Ocean, Redis, WordPress, REST APIs, Native Android and iOS PLUS many more.

Hi, I'm a passionate mobile app developer with 15 years of experience creating seamless, user-friendly, and performant mobile applications for iOS and Android. Whether you're a startup looking to build an MVP or an established company needing to optimize an existing app, I bring a wealth of expertise in delivering top-notch solutions tailored to your business needs. My expertise includes: - iOS Development (Swift, SwiftUI, UIKit) - Android Development (Kotlin, Jetpack Compose) - Cross-platform Development (React Native) - App Store Optimization (ASO) and Deployment - UI/UX Design Integration with Figma and Adobe XD - In-app Purchases, Payments & Subscriptions - API Integration (RESTful APIs, GraphQL) - Third-Party SDKs and Libraries Integration - Firebase, Push Notifications, Analytics Why work with me? - Client-Centric Approach: I believe in clear communication, frequent updates, and delivering on time. - Quality Code: I adhere to best practices and write clean, maintainable, and scalable code. - Full-Cycle Development: From ideation to deployment and post-launch support, I cover all stages of app development. - Problem Solver: I enjoy tackling challenges, whether it’s debugging complex issues or finding innovative solutions to meet your unique requirements. Let’s bring your app idea to life. I’m excited to collaborate on your project!

Hi there! I’m a passionate developer with extensive hands-on experience delivering end-to-end software and hardware solutions. Whether you need a blazing-fast web app, a rock-solid backend API, or a custom FPGA/Qt application, I’ve got you covered. On the frontend, I work confidently with Vue, React, Electron and Tauri to build responsive, dynamic user interfaces. On the backend, I develop scalable systems using Rust, Go, Java, Python, Node.js, and C/C++ — choosing the right tool for performance, reliability, and maintainability. I also specialize in mobile app development, creating high-quality cross-platform UIs with React Native and Flutter as well as native Android (Kotlin/Jetpack Compose) and iOS (Swift/SwiftUI) applications. Let’s build something great together.

12+ years building production-grade web, mobile, and AI-powered applications with 100% Job Success Score and Top Rated status on Upwork. I specialize in three areas where most full-stack developers fall short: → AI & Automation: OpenAI API integrations, GPT-powered tools, trading bots, workflow automation (n8n, Zapier). Built TradersGPT, a live AI-driven trading intelligence platform. → Full-Stack Web & Mobile: React, Next.js, Node.js, Laravel on the web; Flutter & React Native for iOS/Android. From SaaS dashboards to social platforms to marketplace apps. → DevOps & Cloud: AWS, Docker, CI/CD pipelines, PostgreSQL/MongoDB. I deploy, secure, and scale what I build, no handoff to another developer needed. Recent projects: • TradersGPT - AI trading platform with OpenAI integration • TraderVerse - Full-stack trading ecosystem • TraderGuilds - Social networking platform for traders • Caribo - Flutter vehicle rental app, live on App Store & Play Store • Active SOS - Emergency alert app with real-time GPS & push notifications Tech stack: Web: React.js, Next.js, Vue.js, Node.js, NestJS, Laravel, PHP Mobile: Flutter, React Native, Swift, Kotlin AI: OpenAI API, LangChain, GPT-4, automation workflows Cloud/DevOps: AWS, Docker, CI/CD, PostgreSQL, MongoDB, Redis Payments: Stripe, PayPal, RevenueCat, in-app purchases I don't just write code, I help you choose the right architecture, avoid costly mistakes, and ship on time. Available now. Let's discuss your project.

I don’t just develop 𝗮𝗽𝗽𝘀, I build 𝘀𝗰𝗮𝗹𝗮𝗯𝗹𝗲 𝘀𝗼𝗹𝘂𝘁𝗶𝗼𝗻𝘀 that grow your 𝘂𝘀𝗲𝗿𝘀 𝟮–𝟱𝘅. 🏆 𝟳+ 𝗬𝗲𝗮𝗿𝘀 𝗼𝗳 𝗲𝘅𝗽𝗲𝗿𝘁𝗶𝘀𝗲 in mobile app development market 🌟 𝗧𝗼𝗽 𝟭𝟬% 𝗧𝗮𝗹𝗲𝗻𝘁 on Upwork 📱𝟭𝟳𝟬+ Successful Apps Delivered (iOS & Android, Flutter) Most businesses know that a mobile app is essential for growth, but too many waste time and money on 𝘀𝗼𝗹𝘂𝘁𝗶𝗼𝗻𝘀 𝘁𝗵𝗮𝘁 𝗱𝗼𝗻’𝘁 𝘀𝗰𝗮𝗹𝗲, crash under real-world demand, or fail to attract users. With years of expertise and 170+ successful apps delivered, I help businesses cut through the noise and 𝗹𝗮𝘂𝗻𝗰𝗵 𝗽𝗲𝗿𝗳𝗼𝗿𝗺𝗮𝗻𝗰𝗲-𝗽𝗿𝗼𝗼𝗳, scalable apps that drive real growth and user engagement. ✅ 𝗪𝗵𝗮𝘁 𝘆𝗼𝘂 𝗰𝗮𝗻 𝗲𝘅𝗽𝗲𝗰𝘁 𝘄𝗵𝗲𝗻 𝘄𝗼𝗿𝗸𝗶𝗻𝗴 𝘄𝗶𝘁𝗵 𝗺𝗲? Full Project Ownership: From concept to launch, I take responsibility for the entire process, ensuring a seamless delivery. Clarity from Day One: Every milestone, deliverable, and cost is defined upfront. No scope creep. No hidden fees. On-Time & On-Budget Delivery: 95% of my projects are completed exactly as planned. I deliver what I commit to, nothing less. Fast Communication: I respond within 30 mins or less, so you’re never left waiting. Proven Expertise: Recognized as Top 10% of Talent on Upwork. 𝗧𝗲𝗰𝗵 𝗦𝘁𝗮𝗰𝗸 & 𝗦𝗸𝗶𝗹𝗹𝘀: 𝗣𝗿𝗼𝗴𝗿𝗮𝗺𝗺𝗶𝗻𝗴 𝗟𝗮𝗻𝗴𝘂𝗮𝗴𝗲𝘀: Dart, PHP, SQL, PostgreSQL 𝗙𝗿𝗮𝗺𝗲𝘄𝗼𝗿𝗸𝘀 & 𝗦𝘁𝗮𝘁𝗲 𝗠𝗮𝗻𝗮𝗴𝗲𝗺𝗲𝗻𝘁: Flutter, Provider, Riverpod, BLoC, GetX, Redux 𝗠𝗼𝗯𝗶𝗹𝗲 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁: Cross-platform apps (iOS, Android, Web), From-scratch builds, UI Conversion (Figma / Adobe XD → Flutter) 𝗕𝗮𝗰𝗸𝗲𝗻𝗱 & 𝗗𝗮𝘁𝗮𝗯𝗮𝘀𝗲: Firebase, Firestore, Cloud Storage, PostgreSQL, SQL 𝗖𝗼𝗿𝗲 𝗜𝗻𝘁𝗲𝗴𝗿𝗮𝘁𝗶𝗼𝗻𝘀: REST APIs, Google Maps, Location Services, Push Notifications 𝗠𝗼𝗻𝗲𝘁𝗶𝘇𝗮𝘁𝗶𝗼𝗻 & 𝗘𝗻𝗴𝗮𝗴𝗲𝗺𝗲𝗻𝘁: In-App Purchases, Ads Integration, FCM (Firebase Cloud Messaging) 𝗖𝗹𝗼𝘂𝗱 & 𝗦𝗲𝗿𝘃𝗶𝗰𝗲𝘀: Firebase Suite, Third-party API Integrations About my company, DevVibe: DevVibe is a global technology partner specializing in end-to-end digital solutions across Application Development, AI Development, Robotics, IoT/IIoT, CGI, VFX, Web Development, and IT Consultation. We help organizations innovate, scale, and future-proof their businesses through high-performance engineering and design. 𝗧𝗵𝗶𝗻𝗸 𝘄𝗲’𝗱 𝗯𝗲 𝗮 𝗺𝗮𝘁𝗰𝗵? Click ‘Message’ and I’ll reply quickly, typically within 30 minutes. 𝗘𝘅𝗽𝗲𝗿𝘁𝗶𝘀𝗲 𝗶𝗻 E-commerce, On-demand Delivery, Marketplaces, Real Estate, Fitness & Health, EdTech, FinTech, SaaS, Logistics, Food & Grocery, Travel, Social & Chat, Entertainment & Media, Property Management

With over 27 years of professional experience, I specialize in building reliable, scalable, and user-focused digital solutions — from modern websites and e-commerce platforms to mobile apps and desktop applications. Notably, I spent 3 years working with the National Australia Bank (NAB), contributing to large-scale enterprise systems with a focus on performance, security, and long-term maintainability. This experience deepened my skills in working within highly regulated, mission-critical environments and strengthened my ability to deliver enterprise-grade solutions. 💡 My Development Philosophy: I stand by a simple principle: "Be responsible for 3x the development time." That means thorough testing, accountability, and free corrections for any bugs or issues within three times the original development duration. In addition, every project includes 1 year of free consulting, no matter the budget — ensuring your product thrives even after launch. 🤖 AI Chatbot & Automation Development Platforms & Frameworks: OpenAI (GPT-4/4o), Anthropic Claude, LangChain, Chatbot Types: Customer support, Lead qualification, FAQ bots, appointment booking Integrations: Website embed (live chat widget), WhatsApp, Telegram, Slack RAG & Knowledge Bases: Custom document ingestion, vector databases Specialties: Conversational flow design & prompt engineering Multi-turn context management Handoff to human agents Analytics & conversation logging 📱 Mobile App DevelopmentLanguages: Swift (iOS), Kotlin/Java (Android) Frameworks: React Native, Flutter Specialties: Clean mobile UI/UX RESTful API integration Cross-platform optimization Firebase & SQLite data management ⚙️ GoHighLevel (GHL) Development & Integration Full CRM setup, pipeline configuration, and workflow automation Custom funnel and landing page builds inside GHL AI-powered chatbot integration with GHL conversations Automation triggers: SMS, email, voicemail drops, and appointment reminders Sub-account management for agencies Webhook & API integration with third-party tools (Zapier, Make, custom APIs) White-label GHL setup for SaaS resellers Membership sites, course delivery, and form/survey builds 🌐 Web Development Expertise Frontend: React.js, Next.js, Angular.js, Vue.js HTML5, CSS3, JavaScript (ES6+) CMS: Shopify, Wordpress/WooCommerce, Strapi, Payload Backend & APIs: Node.js, Express.js, PHP (Laravel, CodeIgniter) .NET, ASP.NET, Django, Flask Databases: MySQL, PostgreSQL, MongoDB Other Skills: CMS Development, E-Commerce Platforms, Web Automation, Crawling & Scraping Mobile-Responsive UI/UX Design 💻 Windows Desktop Application Development Languages: Python, Java, C/C++ Domains: Computer Vision, AI/ML, Image Processing Tools: Excel VBA for Finance, Amibroker, IB Controller Design Patterns & Scalable Architectures