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With 10+ years of experience, I help startups and businesses build scalable 𝐀𝐏𝐈𝐬, 𝐀𝐈-𝐩𝐨𝐰𝐞𝐫𝐞𝐝 𝐚𝐩𝐩𝐥𝐢𝐜𝐚𝐭𝐢𝐨𝐧𝐬, 𝐰𝐞𝐛 𝐚𝐩𝐩𝐬, 𝐦𝐨𝐛𝐢𝐥𝐞 𝐚𝐩𝐩𝐬, 𝐚𝐧𝐝 𝐚𝐮𝐭𝐨𝐦𝐚𝐭𝐢𝐨𝐧 𝐬𝐲𝐬𝐭𝐞𝐦𝐬 using Python, FastAPI, React, and modern AI/LLM tools. If you need to build, scale, or automate your product, I can take it from idea → production. 📌 𝐖𝐡𝐚𝐭 𝐈 𝐂𝐚𝐧 𝐁𝐮𝐢𝐥𝐝 𝐅𝐨𝐫 𝐘𝐨𝐮 ✔ AI-powered applications (GPT-4, Claude, Gemini, LLMs, RAG systems) ✔ AI integrations (chatbots, AI agents, automation workflows, LLM features) ✔ High-performance Python APIs (FastAPI, Django, Flask) ✔ Full-stack web applications (React, Next.js, Vue, SaaS, dashboards) ✔ Web applications, portals, admin panels, and enterprise solutions ✔ Mobile applications (iOS & Android apps) ✔ Automation systems, AI workflows & data pipelines ✔ API integrations (Stripe, PayPal, Twilio, CRMs, payment gateways) ✔ Web scraping & data extraction ✔ RAG systems connected to documents, databases, and knowledge bases 📌 𝐖𝐞𝐛 & 𝐌𝐨𝐛𝐢𝐥𝐞 𝐀𝐩𝐩 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭 ✔ Custom web application development (React, Next.js, Vue) ✔ SaaS platforms, dashboards, admin panels, portals & enterprise applications ✔ Native mobile app development (Swift iOS, Kotlin Android) ✔ REST / GraphQL APIs ✔ Authentication, push notifications & real-time features ✔ High-performance responsive UI/UX ✔ Scalable backend architecture and cloud-ready applications 📌 𝐌𝐲 𝐂𝐨𝐫𝐞 𝐒𝐤𝐢𝐥𝐥𝐬 ✔ 𝐁𝐚𝐜𝐤𝐞𝐧𝐝: Python, FastAPI, Django, Flask, Node.js, Express ✔ 𝐅𝐫𝐨𝐧𝐭𝐞𝐧𝐝: React, Next.js, Vue ✔ 𝐌𝐨𝐛𝐢𝐥𝐞: Swift, Kotlin ✔ 𝐀𝐈/𝐋𝐋𝐌: GPT-4, Claude, Gemini, LangChain, LangGraph, RAG, Embeddings, AI Agents ✔ 𝐃𝐚𝐭𝐚: Scrapy, Playwright, Selenium, ETL Pipelines, Data Processing ✔ 𝐃𝐚𝐭𝐚𝐛𝐚𝐬𝐞𝐬: PostgreSQL, MySQL, MongoDB, DynamoDB, Firebase, Supabase, Airtable ✔ 𝐂𝐥𝐨𝐮𝐝/𝐃𝐞𝐯𝐎𝐩𝐬: AWS, GCP, Azure, Docker, Kubernetes, CI/CD ✔ 𝐈𝐧𝐭𝐞𝐠𝐫𝐚𝐭𝐢𝐨𝐧𝐬: Stripe, PayPal, Twilio, Slack, Google Workspace, Airtable, QuickBooks, APIs, Webhooks, OAuth 📌 𝐖𝐡𝐲 𝐂𝐥𝐢𝐞𝐧𝐭𝐬 𝐇𝐢𝐫𝐞 𝐌𝐞 ✔ Clean, scalable, production-ready code ✔ Strong system design & architecture ✔ Fast delivery without sacrificing quality ✔ Experience in AI + Web Apps + Mobile Apps + Automation ✔ Human-in-the-loop AI workflows, monitoring & validation ✔ Clear communication & reliable execution 🔷 𝐋𝐞𝐭’𝐬 𝐁𝐮𝐢𝐥𝐝 𝐒𝐜𝐚𝐥𝐚𝐛𝐥𝐞 𝐏𝐫𝐨𝐝𝐮𝐜𝐭𝐬 Need a developer who can handle AI systems, API integrations, automation, web applications, mobile applications, and scalable backend architecture? 𝐒𝐞𝐧𝐝 𝐦𝐞 𝐲𝐨𝐮𝐫 𝐫𝐞𝐪𝐮𝐢𝐫𝐞𝐦𝐞𝐧𝐭𝐬, 𝐚𝐧𝐝 𝐈’𝐥𝐥 𝐬𝐮𝐠𝐠𝐞𝐬𝐭 𝐭𝐡𝐞 𝐛𝐞𝐬𝐭 𝐚𝐩𝐩𝐫𝐨𝐚𝐜𝐡, 𝐚𝐫𝐜𝐡𝐢𝐭𝐞𝐜𝐭𝐮𝐫𝐞, 𝐚𝐧𝐝 𝐬𝐭𝐚𝐫𝐭 𝐢𝐦𝐦𝐞𝐝𝐢𝐚𝐭𝐞𝐥𝐲.

I build mobile apps — the real kind, native, shipped to the store, used by actual people — and lately the AI systems inside them. I've been doing the first for 20 years and the second long enough to know where it actually pays off. I'm Expert-Vetted on Upwork (top 1% of talent), with 100% Job Success, 5,700+ hours, and $200K+ earned. Behind that is 20+ years in software — a decade architecting enterprise systems at Accenture for Fortune 500s, then CTO of a SaaS startup I scaled from 3 to 30+ engineers and took to consumer scale. I'm completing Stanford's AI Professional Program now. What you get is a CTO-caliber technologist who never stopped writing production code. I work two ways, depending on what you need: ⸻ * Mobile Apps — zero to App Store * (fixed-price) You have an idea or a validated concept; I deliver the finished app, live in the App Store and Play Store. Architecture, design, frontend, backend, deployment, and the part most people underestimate — actually getting through store review, native builds, push, Live Activities, the works. I've shipped 20+ mobile apps, several used by hundreds of thousands of people, and I handle the whole build personally. Shipping a native app to a store is a different discipline than deploying a web app, and it's the discipline I've spent years in. * AI Systems and other complex software — design & build * (hourly) Production AI/LLM systems, not prototypes. My recent work is a multi-vendor LLM pipeline that benchmarked 21 model-and-strategy combinations across Claude, GPT, and Gemini over 54 recipe sources in 7 countries — automated quality scoring against an Opus gold-standard reference, and cost tuned across a 150x price spread down to the best quality-per-dollar. The hard part of AI work isn't calling an API; it's knowing where AI actually earns its keep, which model fits which job, and how to architect a pipeline that holds up in production. That's what I do, then I build it — often straight into the mobile products above. ⸻ The background behind that: 10 years at Accenture on large-scale systems for Fortune 500s in healthcare, telecom, oil & gas, and retail. Then CTO at a SaaS startup — engineering scaled 3 to 40, a multi-service platform shipped with payments, identity, and real-time processing running at consumer scale. 📎 Stanford — AI Professional Program (completing August 2026) 📎 Kellogg — Product Strategy 📎 TOGAF Certified Enterprise Architect ⸻ Native Mobile (React Native / Expo, App Store & Play Store delivery) · TypeScript/JavaScript · LLM APIs (Claude, GPT, Gemini) · Prompt Engineering · Multi-Model Pipelines · React · Next.js · Node.js · Supabase · PostgreSQL · AWS · Solution Architecture

Need a FlutterFlow mobile app that works like a real product, not just a few screens connected together? I help founders, startups, small businesses, and product owners turn app ideas into working iOS and Android MVPs using FlutterFlow, Firebase, Firestore, Supabase, Stripe, APIs, and clean mobile UX. My focus is on building mobile apps with real user flows, backend logic, and the core features needed to test, launch, and improve a product. Whether you are building a fintech app, marketplace, subscription app, community app, booking app, delivery app, AI-powered mobile app, or internal business tool, I can help you structure and build the MVP properly. I can help with: FlutterFlow mobile app development iOS and Android MVP development Firebase and Firestore backend setup Supabase backend setup User signup and login User authentication User profile creation Dashboards and tracking screens Stripe and payment gateway integration Subscription and in-app purchase flows API integration Push notifications In-app search Chat and messaging features Map integration and location-based services Admin dashboards Mobile app bug fixing Mobile app testing Firebase cleanup and app flow improvement UI/UX prototyping for mobile apps If your app needs users to create accounts, make payments, join groups, search content, message other users, track activity, view dashboards, receive notifications, or interact with backend data, I can help you build the right structure. Many app projects fail because the first version is either too basic, too messy, or too disconnected from the business goal. The screens may look good, but the authentication breaks, the database is poorly structured, payment flow is unclear, dashboards do not update correctly, or the app becomes difficult to improve later. That is the problem I help solve. My process is practical. I first clarify the app goal and user flow, then map the screens, define the backend structure, build the frontend in FlutterFlow, connect Firebase or Supabase, set up authentication, integrate APIs or payments where needed, test the core actions, and clean up the flow before handoff. I work best on apps that need real business logic, such as: Fintech MVPs Savings circle or ROSCA apps Marketplace apps Subscription apps Community apps Booking apps Delivery apps Learning apps AI chatbot apps Customer portal apps Mobile dashboards Internal business apps Location-based apps For example, if you are building a savings circle app, I can help structure user signup, verification, create/join group flows, weekly payment tracking, dashboard views, security deposit logic, member status, payment records, and Stripe or payment gateway integration. If you are building a marketplace app, I can help with user profiles, listings, search, filters, chat, map/location features, saved items, admin control, and backend data structure. If you are building a subscription or membership app, I can help with authentication, subscription access, user dashboards, payment flows, push notifications, and account management. If you already have a FlutterFlow app, I can also help fix broken Firebase connections, authentication issues, Firestore query problems, payment errors, navigation bugs, slow user flows, API issues, dashboard data problems, and mobile responsiveness issues. Tools I work with include FlutterFlow, Flutter, Dart, Firebase, Firebase Cloud Firestore, Firebase Realtime Database, Supabase, Stripe, REST APIs, OpenAI API, push notifications, Google Maps API, and mobile app testing workflows. You can expect clear communication, structured app planning, clean FlutterFlow builds, reliable backend setup, careful handling of user data, payment/API integrations that match the user flow, testing before handoff, and practical feedback on what should or should not be in the MVP. I am a good fit if you need a developer who can help with both the build and the structure behind the build. I am not here to just connect random screens. I focus on building mobile apps that users can actually sign into, use, pay through, interact with, and test in the real world. Send me a message with your app idea, feature list, wireframe, or current app link, and I will help you map the best way to build it.

As an AOSP (Android Open Source Project) engineer, I specialize in designing, customizing, and optimizing Android platform for various devices. My role involves working with the Android framework, HAL (Hardware Abstraction Layer), kernel, and system-level components to deliver tailored solutions for device manufacturers and developers. I am passionate about building robust and innovative systems that enhance user experiences and contribute to the Android ecosystem.

Hi, I'm Paul. Transforming complex tech ideas into market-ready products is my forte. With 8 years of hands-on experience, I offer end-to-end expertise in advanced PCB design, rapid prototyping, and robust firmware development for IoT, robotics, and ultra-low power applications. My background as a startup team leader ensures a product-centric vision and accelerated project/ MVP delivery. 1. What I Offer: End-to-End Embedded & Hardware Solutions - Advanced PCB Design & Hardware Development: Multi-layer PCBs for complex applications, focusing on reliability and performance. - High-Speed Design: Expertise in USB 2.0, HDMI 2.0, DDR3/DDR4/LDDR4, PCIe, NAND Flash, 10/100/1000/10Gbase-T1 Ethernet, PoE++. - Microcontrollers & SoMs: ARM Cortex-M3/M4 (STM32WL, ESP32, Nordic nRF52/53/91 series); custom boards for Raspberry Pi CM4, Orange Pi, iMX8, Jetson Nano/Xavier/Orin, RK3588, RK3568, RV1126, TI AM6254. - Power & Analog: DC-DC (Flyback, Boost, Buck, LDOs), motor control (BLDC, AC/DC servo via I/O, ADC, CAN), high-resolution ADC/DAC, Audio circuits. DFM/DFA & Compliance: Strong knowledge of manufacturing, assembly processes, and layout techniques for EMC/EMI compliance. - Tools: Altium Designer (Altium365/CircuitMarker), KiCAD, Eagle, EasyEDA; OrCAD, PSpice, CAM350. - Prototyping: Experience with BOM creation (Digikey/Mouser/JLCPCB) and combining dimensional drawings into precise Gerber formats. - CAD/3D design tool: SolidWorks, Inventor... 2. Robust Firmware Development: - Languages: C, C++, Python, Qt. IoT & Wireless: MQTT, Thingsboard, AWS IoT, Blynk; experience with RF, Wi-Fi, BLE, GSM (3G/4G/LTE), LoRaWAN. - Robotics: Expertise in ROS/ROS2 for applications like AGV, AMR, 6-axis robots. Low-level Interaction: Proficient in designing custom drivers, managing communication protocols (QSPI, I2C, RS485, RS232, CAN, Modbus TCP/IP/RTU). - UI/UX for Embedded: Figma, TouchGFX, LVGL for STM32, ESP32, Raspberry Pi. 3. Product & Project Leadership: - Startup Leadership: Proven ability to lead and manage cross-functional teams in startup environments. - Project Management: Expertise in managing design, fabrication, and procurement for cost-efficient and timely PCB acquisition. - Problem-Solving & Research: Strong initiative, research capabilities, and excellent troubleshooting skills for electrical evaluation, testing, and PCB issues. 4. Why Partner with Me? - End-to-End Product Vision: My background in leading startup projects provides a holistic view, ensuring your solution is not just technically sound but also viable and market-ready. - Deep Technical Mastery: From complex high-speed routing and power supply design to robust firmware for robotics and IoT, I handle intricate challenges with precision. - Cost & Time Efficiency: My knowledge of DFM/DFA and experience in optimizing BOMs, coupled with efficient procurement management, helps streamline your project and reduce overall development costs and time. Ready to turn your innovative idea into a high-quality product? Let's connect to discuss how my expertise can drive your project's success.

I help startups and growing businesses turn their ideas into high-performance, revenue-generating mobile applications, faster and more cost-effectively. Deal for you: You will get scalable product, a Pixel Perfect designed app built to solve real problems and generate revenue. With over 10 years of software engineering experience, I successfully built pixel-perfect, scalable Flutter apps for both iOS and Android. From cutting-edge AI integrations to complex SaaS platforms, I take full ownership of the mobile lifecycle from initial wireframes to App Store launch. What You Get: • Cross-platform Flutter apps with native-level performance • AI & LLM integration (ChatGPT-like features, smart automation, intelligent recommendations) • Beautiful, pixel-perfect UI/UX (Figma to Flutter) • Scalable backend, REST APIs, Firebase, and third-party integrations • Payment gateways, In-App Purchases, Push Notifications & User Authentication • Clean Architecture, BLoC, Riverpod • App Store & Google Play deployment Proven Development Process: 1. Discovery & Strategy 2. UI/UX Design 3. Development 4. Testing & QA 5. Deployment & Launch 6. 8 Weeks FREE Post-Launch Support & Maintenance I offer a free 30-minute consultation to discuss your idea, suggest the best tech stack, provide realistic timelines and costs, and help you make informed decisions. Recent Client Feedback: "Bilawal worked on SensorSwarm and developed Apple iOS & Android app. He was professional, detailed and an excellent communicator that offered ideas to problems as they came up. I would connect with Bilawal again in the future for our next SaaS application projects." — Dale S., President at SensorSwarm, Inc. ⭐⭐⭐⭐⭐ I’ve successfully delivered a wide range of mobile applications including: • Food Delivery & Grocery Apps • Ride-Sharing & Booking Platforms • Real Estate & Marketplace Apps • Social Media & Content Apps • Fitness, Wellness & AI Apps • E-commerce & On-Demand Services • SaaS, Education, Appointment & Inventory Management Apps I don’t just code, I work as your technical partner who focuses on building apps that solve real problems, delight users, and drive business growth. If you're looking for a reliable, experienced Flutter developer who delivers quality and communicates clearly, let’s schedule a quick call and bring your app idea to life.