𝗡𝗲𝗲𝗱 𝗮 𝗽𝗿𝗼𝗱𝘂𝗰𝘁𝗶𝗼𝗻-𝗿𝗲𝗮𝗱𝘆 𝗠𝗩𝗣 𝗶𝗻 𝗹𝗲𝘀𝘀 𝘁𝗵𝗮𝗻 𝟯𝟬 𝗱𝗮𝘆𝘀? I’m William — solo full-stack engineer who’s shipped 𝟮𝟬+ 𝗦𝗮𝗮𝗦 & 𝘄𝗲𝗯-𝗮𝗽𝗽 𝗠𝗩𝗣𝘀, 𝟰 𝘁𝗵𝗮𝘁 𝗵𝗶𝘁 $$𝟱-𝟭𝟱 𝗸 𝗠𝗥𝗥 𝗶𝗻 𝘁𝗵𝗲 𝗳𝗶𝗿𝘀𝘁 𝟵𝟬 𝗱𝗮𝘆𝘀. I turn Figma or spreadsheet hacks into clean, scalable products that win paying users fast. 💡 𝗪𝗵𝗮𝘁 𝗜 𝗗𝗲𝗹𝗶𝘃𝗲𝗿 𝗟𝗲𝗮𝗻 𝗠𝗩𝗣𝘀 & 𝗶𝗻𝘁𝗲𝗿𝗻𝗮𝗹 𝘁𝗼𝗼𝗹𝘀 built with React, Next.js, Supabase, Node.js, PostgreSQL 𝗔𝗜 𝗳𝗲𝗮𝘁𝘂𝗿𝗲 𝗶𝗻𝘁𝗲𝗴𝗿𝗮𝘁𝗶𝗼𝗻𝘀 (OpenAI / ChatGPT / Whisper, vector search, embeddings) 𝗦𝘂𝗯𝘀𝗰𝗿𝗶𝗽𝘁𝗶𝗼𝗻 & 𝗽𝗮𝘆𝗺𝗲𝗻𝘁𝘀 (Stripe, LemonSqueezy, Paddle) 𝗔𝘂𝘁𝗵 & 𝘂𝘀𝗲𝗿 𝗺𝗮𝗻𝗮𝗴𝗲𝗺𝗲𝗻𝘁 (Clerk, Supabase Auth, Auth0, Magic links) 𝗥𝗲𝗮𝗹-𝘁𝗶𝗺𝗲 𝗱𝗮𝘀𝗵𝗯𝗼𝗮𝗿𝗱𝘀 & 𝗮𝘂𝘁𝗼𝗺𝗮𝘁𝗶𝗼𝗻𝘀 (tRPC, Socket.io, Webhooks, CRON jobs) 𝗗𝗲𝘃𝗢𝗽𝘀 & 𝗰𝗹𝗼𝘂𝗱 (Vercel, AWS, Docker, CI/CD) 𝗥𝗮𝗽𝗶𝗱 𝗽𝗿𝗼𝘁𝗼𝘁𝘆𝗽𝗶𝗻𝗴 — iterate with live demos every 3-5 days 🚀 𝗥𝗲𝗰𝗲𝗻𝘁 𝗪𝗶𝗻𝘀 (𝗮𝗹𝗹 𝗰𝗼𝗱𝗲𝗱 𝘀𝗼𝗹𝗼, 𝗻𝗼 𝗹𝗼𝘄-𝗰𝗼𝗱𝗲) - 𝗘𝘅𝗽𝗹𝗼𝗱𝗶𝗻𝗴𝗦𝗵𝗼𝗿𝘁𝘀 – AI video SaaS 28 days 1,400 creators • $3.2k MRR - 𝗝𝗼𝗯𝗦𝗻𝗮𝗽 – AI resume & interview coach 28 days 3k users • 96 NPS - 𝗜𝗺𝗺𝗼𝗦𝗽𝗼𝘁 – real-estate marketplace 30 days 200+ leads/mo generated 🔧 𝗖𝗼𝗿𝗲 𝗧𝗲𝗰𝗵 React, Next.js 14, TypeScript, Supabase, Node.js, Express, tRPC, Prisma, PostgreSQL, Redis, Tailwind / shadcn/ui, Stripe, Twilio, SendGrid, OpenAI, LangChain, Vercel, AWS, Docker, CI/CD, GitHub Actions 🏆 𝗪𝗵𝘆 𝗖𝗹𝗶𝗲𝗻𝘁𝘀 𝗛𝗶𝗿𝗲 𝗠𝗲 ✓ 𝗦𝗽𝗲𝗲𝗱 & 𝗙𝗼𝗰𝘂𝘀 — first deploy in days, MVP in weeks ✓ 𝗖𝗹𝗲𝗮𝗿 𝗖𝗼𝗺𝗺𝘂𝗻𝗶𝗰𝗮𝘁𝗶𝗼𝗻 — daily async Loom updates, English + French fluent ✓ 𝗦𝗼𝗹𝗼 𝗔𝗰𝗰𝗼𝘂𝗻𝘁𝗮𝗯𝗶𝗹𝗶𝘁𝘆 — one expert, zero agency overhead ✓ 𝗖𝗹𝗲𝗮𝗻, 𝘀𝗰𝗮𝗹𝗮𝗯𝗹𝗲 𝗰𝗼𝗱𝗲 that your next dev loves ➡️ 𝗥𝗲𝗮𝗱𝘆 𝘁𝗼 𝗹𝗮𝘂𝗻𝗰𝗵? Message me or send an invite to discuss your project — I’ll reply within a few hours with a quick roadmap & quote. MVP development, SaaS developer, full-stack JavaScript, web application, product engineer, AI integration, GPT-4, ChatGPT API, Supabase expert, React developer, Next.js developer, Node.js backend, Stripe payments, Twilio SMS, SendGrid email, TypeScript, PostgreSQL, REST API, GraphQL, WebSockets, Vercel hosting, CI/CD, startup CTO, rapid prototyping, minimum viable product, automation platform, dashboard, authentication, subscription billing, SaaS MVP, lean startup, application modernization, cloud deployment

My journey in full stack development has equipped me with the skills to transform ideas into fully functional and aesthetically pleasing websites. I specialize in front-end and back-end development, ensuring seamless user interactions and robust server-side functionalities. Whether it's crafting intuitive user interfaces, optimizing website performance, or solving complex coding challenges, I thrive on delivering solutions that exceed expectations. As an experienced software engineer and dedicated full stack developer, I am passionate about harnessing the power of web technologies to create dynamic and user-friendly online experiences. With expertise in a range of programming languages and frameworks, including Vue.js, I excel at building responsive and feature-rich web & mobile applications. I'm confident in these fields below: ✓ React.js / Next.js ✓ React Native ✓ Vue JS ✓ WordPress ✓ HTML/CSS ✓ Bootstrap ✓ MaterialUI ✓ Node.js ✓ Express.js ✓ PHP - Laravel ✓ RESTful API ✓ ChatGPT Consultant Expert ✓ MongoDB ✓ MySQL ✓ PostgreSQL ✓ GraphQL In every project I undertake, I prioritize open and transparent communication, strategic planning, and the consistent delivery of outstanding web outcomes. My goal is to partner with clients to bring their visions to life and help them achieve their online objectives. I am available as a full time freelancer on upwork. Just message for a detailed discussion. Best Regards.

As a seasoned eCommerce strategist, I bring a wealth of experience in driving business growth and enhancing digital performance for mid-market brands ($2-25M ARR). My expertise lies in the full Shopify and Shopify Plus ecosystem, complemented by a strong proficiency in Klaviyo for email automation and campaign management. ✍️ What I Offer: ⚫ Comprehensive Shopify Solutions: I am an expert in building, optimising, and scaling Shopify and Shopify Plus stores for brands generating between $2-25M ARR who aim to grow further. From re-platforming projects to custom app integrations, I provide end-to-end solutions that drive revenue and improve user experience. ⚫ Klaviyo Email Marketing: I design and implement high-impact email automation and campaign strategies that increase engagement and drive sales. I'm a Klaviyo Silver Advisor and partner and am constantly at the forefront of best-in-class implementation strategies across your email channel. I leverage Klaviyo's advanced features for segmentation, personalization, and analytics. ⚫ Conversion Rate Optimization (CRO): I utilise data-driven strategies to enhance website performance and increase conversion rates. I regularly implement projects utilising tools such as Nosto, Searchspring, Gorgias, Recharge, Skio and various CRO-related apps. ⚫ Data Migration and Replatforming: I seamlessly migrate data and replatform eCommerce sites with minimal disruption, ensuring data integrity and continuity in operations. Past experience migrating from Magento, WooCommerce, Nopcommerce, and Oracle Commerce. Migrations have utilised Shopify Plus expansion stores & markets where needed. 🙂 Client Experience: In my career, I have successfully partnered with over 50 mid-market and enterprise brands across various industries. My approach focuses on clear communication, strategic planning, and delivering measurable results. I pride myself in my ability to communicate complex systems clearly and providing best-in-class solutions that make business sense. ✍️ Why Work With Me? ⚫ Proven Track Record: I have extensive experience in delivering high-level projects that enhance brand value and drive eCommerce growth. Please see my portfolio for case studies. ⚫ Holistic Approach: With close to 10 years of experience working with cross-functional teams, I have a comprehensive understanding of the eCommerce landscape, ensuring all aspects of your online business are optimised. ⚫ Client-Centric: I am dedicated to building long-term relationships and providing exceptional service that meets your business needs. Based in Auckland, New Zealand, I am committed to helping ambitious brands achieve their eCommerce goals through strategic planning and expert execution. I am looking forward to working together.

Hello It's easy to find people promising everything and delivering almost nothing. My major strengths are in giving realistic promises, being responsive and responsible, concentrating on business needs and communications. So I am not a pure geek thinking about technology only but, first, a making-things-happen person. Here are my skills: Frontend: React, Next.js, Svelte, Vue Backend: Node, Express, PHP Data Layer: Redux, GraghQL Will do my best to satisfy you.

Most applications fail because they are built to function, not to scale. I build systems engineered for absolute efficiency, high concurrency, and zero latency. I step into complex, failing architectures, isolate the bottlenecks, and execute the solution. My expertise lies in deep-stack execution: optimizing MERN ecosystems, React Native interfaces, and TypeScript architectures. I have engineered enterprise solutions utilizing hybrid database architectures, including PostgreSQL, Prisma, and MongoDB. I do not do boilerplate hand-holding; I architect high-concurrency API load testing across distributed microservices to pinpoint critical latency bottlenecks and ensure mission-critical readiness. The Arsenal: 1. High-Performance Architecture: I engineered a scalable financial trading engine utilizing a microservice architecture. I optimized complex order-matching algorithms via Redis to ensure sub-millisecond trade execution. 2. Massive Scale: I spearheaded the official platform for Asia's largest tech fest, delivering interactive visuals to 130,000+ unique visitors. I architected an accommodation engine managing 25,000+ users via Redis locking to prevent race conditions and ensure ACID compliance. 3. The Deep Stack: I am fluent in the MERN ecosystem, React Native, Next.js, and TypeScript. I engineer real-time React terminals utilizing Zustand state management and WebSockets to synchronize live data flawlessly. 4. DevOps & Edge Control: I orchestrate the deployment of applications on bare-metal servers within secured local networks, implementing distributed architecture via Docker containerization and Nginx reverse proxying. I operate on a strict signal-to-noise ratio. You hand over the problem. I hand back production-ready code. If your system is broken, let's stop the bleed. Send me the core issue, and let's get to work.

⭐⭐⭐⭐⭐"He shipped our MVP in 10 days and saved us $40K in dev costs. The app handled 500 concurrent users on launch day without a single crash." Said Jason R, SaaS Founder I am a dedicated, experienced bubble developer helping non-technical founders and startups turn raw ideas into revenue-generating bubble io applications in weeks, not months. With $100K+ earned on Upwork, 100% Job Success, Top Rated Plus status, and 50+ bubble io products launched, I build bubble io apps that are fast, scalable, and ready to transact from day one. If you are searching for a reliable bubble developer, bubble io expert, or a bubble no code agency to bring your idea to life, you are in the right place. BUBBLE IO DEVELOPMENT SERVICES 1 Custom bubble io SaaS and bubble mvp Development, using bubble no code tools to match your business logic and go-to-market strategy 2 Bubble io Database Architecture and Optimization, a bubble developer skill for scalable data structures and growth 3 Bubble api Integration, connecting Stripe, PayPal, OpenAI, ChatGPT, Google APIs, Zapier, Make, and n8n 4 Bubble io Payment and Subscription Systems, built as a bubble mvp checkout flow with automated billing and invoicing 5 Bubble io UI and UX Design, pixel-perfect Figma to bubble io conversion that is mobile-first and responsive 6 Bubble io AI Integration and Automation, ChatGPT-powered bubble no code features and smart backend workflows 7 Bubble io Mobile-Responsive Development, a seamless bubble developer build for desktop, tablet, and mobile 8 Bubble io Bug Fixing and Performance Tuning, speed audits and bubble api workflow cleanup for workload reduction 9 Bubble io Authentication and Security, user management and role-based bubble no code access control 10 Bubble io Maintenance and Scaling, post-launch bubble developer support and version control CORE BUBBLE IO EXPERTISE Full-stack bubble no code frontend and backend workflow development, complex conditional logic and custom states, bubble api backend workflows and scheduled automation, relational database modeling for bubble mvp apps, custom bubble io plugin development, bubble developer responsive engine mastery, bubble io on-page SEO structure, and bubble io integration with Xano, Supabase, and Airtable for advanced data needs PROJECT HIGHLIGHTS BUILT WITH BUBBLE IO A.FinFlow, a bubble io fintech dashboard built by a bubble developer with Stripe Connect integration, now processing $2M+ in monthly transactions B.EduSpark, a bubble no code edtech platform with ChatGPT tutoring, serving 10,000+ active users C.HireSwift, a bubble mvp hiring marketplace built from scratch in 14 days, helping the founder secure $500K in pre-seed funding D.HealthSync, a bubble api healthcare CRM with scheduling, inventory, and HIPAA-inspired security WHY FOUNDERS CHOOSE THIS BUBBLE DEVELOPER -Rapid speed-to-market with production-ready bubble mvp apps delivered in 7 to 14 days, not low-fidelity prototypes -A business-first bubble io approach, every workflow and feature is built to drive revenue, retention, and growth -Scalable bubble no code architecture with clean data models that perform reliably beyond 1,000+ users -Transparent, agile communication with daily updates, milestone sprints, and no confusing technical jargon -Long-term bubble developer partnership for scaling, pivoting, and version 2 development well beyond launch day BUBBLE IO DEVELOPMENT PROCESS 🔹Discovery and Strategy, a deep dive into your vision, target users, and revenue model before any bubble io development begins 🔹Wireframing and Scope Alignment, low-fidelity user flow mapping and structural approval to eliminate surprises 🔹 Sprint-Based bubble mvp Development, milestone-driven builds with live demos and regular feedback loops 🔹QA and Launch Prep, rigorous testing and security validation for your bubble api and app Step 5 Post-Launch bubble io Scaling, continuous improvement based on real user behavior and analytics TECHNOLOGIES Bubble io, Xano, Supabase, Stripe, PayPal, OpenAI, ChatGPT, Zapier, Make, n8n, Google Maps, Google OAuth, Airtable, Figma, REST API, JSON, Webhooks, SQL, Mapbox READY TO BUILD YOUR BUBBLE MVP PRODUCT Whether you need a bubble mvp to validate an idea, a bubble io SaaS platform for paying customers, or an internal bubble no code automation tool, I will help you skip traditional dev delays and launch a bubble io product that real users actually pay for 👉Click "Invite" or "Message" now to discuss your bubble io project, I typically respond within 1 hour and I am available as your bubble developer for immediate project kickof Keywords: bubble io, bubble developer, bubble no code, bubble mvp, bubble api, bubble io developer, bubble io expert, bubble io consultant, bubble io app, bubble io saas, bubble io agency, bubble io freelancer, bubble io template, bubble io plugin, bubble io workflow, bubble io database, bubble io automation, no-code development, startup mvp builder, saas app developer Bubble io expert

🙋🏻 AVAILABLE NOW I’m a Flutter developer with several years of experience turning ideas into high-performance, beautiful, and reliable mobile applications. I specialize in delivering cross-platform apps that combine modern design, clean architecture, and smooth user experience - from concept to launch. 🚀 What I Offer ✅ Cross-Platform Development: iOS, Android, and Web ✅ Clean Architecture: Scalable and maintainable code (OOP) ✅ State Management: BloC, Provider, Riverpod ✅ UI/UX: Pixel-perfect responsive design implementation ✅ Backend Integration: REST APIs, MQTT, WebSockets, Firebase, Supabase ✅ Payment Systems: Native In-App, Stripe, PayPal, and custom 3rd-party integrations ✅ Location & Maps: Google Maps, OpenStreetMap, GPS Services ✅ Ads & Monetization: Google Ads integration ✅ AI Integration: Embedding AI tools and models ✅ Testing & Optimization: Unit/Widget testing, performance tuning ✅ CI/CD: GitHub Actions workflow automation ✅ App Deployment: App Store, TestFlight, Play Store publishing 🔥 Full-Stack with Firebase • Authentication (Email, Google, Apple, Social logins) • Databases & Storage (Firestore, Realtime DB, Cloud Storage) • Cloud Functions (JS/TS) • Notifications (Firebase Messaging) • Analytics & Crash Reporting (Google Analytics, Crashlytics) 🧰 Tools & Stack • UI/Design: Figma, Adobe XD, Photoshop, Illustrator • Version Control: GitHub, Bitbucket • Project Management: Jira, Linear, ClickUp, Slack 💡 Professional Skills Focused, reliable, and results-driven. Strong in: Project management • Problem solving • Teamwork • Communication • Time management • Adaptability • Fast learning 🛎 Additional Expertise Embedded Hardware & Software Engineering | PCB Design | Telecom & IT Engineering ✨ Let’s build something great together! If you’re looking for a Flutter developer who delivers clean code, great UX, and on-time results — let’s talk.

I help brands scale internationally and optimise their digital stores for maximum profit. As a native Japanese bilingual, I specialise in localising Western brands for the Japanese market, ensuring your site doesn't just "translate," but actually resonates with local consumers. - Expert in CMS, Algolia, Klaviyo, Mailchimp, GA4, and SEO - Full localisation and project management from start to finish - Proven results, including a recent 28% uplift in Average Order Value

Hello! I am the owner and lead engineer of Long Software LLC, a Flutter dev shop based in the states. I am super passionate about building unique mobile experiences and empowering small to mid-sized businesses looking to go digital.

I am a mobile developer with 5+ years of experience building production-grade apps for fintech, e-commerce, and media clients. I have worked across the full mobile development lifecycle from feature development and architecture to release management and CI/CD. My work spans Flutter, native iOS with Swift and SwiftUI, and FlutterFlow. ✅ 5+ years building and shipping production Flutter apps across fintech, e-commerce, and media ✅ Delivered real fintech features — payments, deposits, loans — not just demo apps ✅ Built a fully native iOS app solo using Swift 6, SwiftUI, and Apple Intelligence ✅ Integrated on-device AI using Apple Foundation Models — no API cost, no server ✅ Built and migrated FlutterFlow apps to full Flutter for scalability I build mobile apps that are clean, maintainable, and built to scale. My Flutter work is grounded in Clean Architecture, BLoC, and Provider — used in production fintech environments where code quality actually matters. Recently shipped AURA — a native iOS app built solo in Swift 6/SwiftUI with on-device AI personalisation using Apple Foundation Models, WidgetKit lock screen widgets, and RevenueCat monetisation. No backend, no server, fully offline. 𝐓𝐞𝐜𝐡 𝐒𝐭𝐚𝐜𝐤: ✔️ Mobile: Flutter (Dart), Swift 6, SwiftUI, FlutterFlow ✔️ Architecture: Clean Architecture, MVP, BLoC, Provider ✔️ AI: Apple Foundation Models (on-device), Apple Intelligence ✔️ iOS Native: SwiftData, WidgetKit, UserNotifications, StoreKit 2, RevenueCat, CloudKit ✔️ Backend & APIs: Node.js/Express, PHP/Laravel, REST APIs, GraphDB (Neo4j) ✔️ Database: Firebase (Auth, FCM, Firestore, Analytics), SQL, NoSQL ✔️ CI/CD: Codemagic (Android & iOS), Docker ✔️ Version Control: GitHub, GitLab, Bitbucket ✔️ Tools: Jira, Asana, OpenProject 𝐃𝐨𝐦𝐚𝐢𝐧 𝐄𝐱𝐩𝐞𝐫𝐢𝐞𝐧𝐜𝐞: ◉ Fintech — Payments, Deposits, Loans, Risk Scoring ◉ E-commerce — Order management, Auth, Notifications, Deep Linking ◉ News & Media — CMS integration, Search, Ads ◉ Clinical — Dynamic form builders, Multi-tenant workflows ◉ Social — Matching, Real-time chat, Location-based features ◉ FlutterFlow — Rapid prototyping and production-to-Flutter migration If you need a Flutter or iOS developer who has shipped real production apps, let's talk.