Jiayin Li's avatar
Jiayin Li
PROShinjuku City, Japan
Full-Stack & Mobile App Expert | AI & Cloud Solutions
$5k+
Earned
4x
Hired
5.0
Rating
189
Followers
FLUTTERFLOW_USER_EXPERT

Partner

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Certified

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Bíbliuappin
3
9
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World Time App Development
1
2
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Gokartz Freelance Talent Connection
6
49
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CinePix Mobile App Development
1
1
SQLite(1)
Izzy Chinwuba's avatar
Izzy Chinwuba
Nigeria
MVP Dev for Startups | Fullstack + AI Integrations
1x
Hired
5.0
Rating
8
Followers
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Swiss Kids Academy
0
6
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AirBills (Crypto Payment Platform)
0
0
Cover image for I just deleted 1,740 lines
I just deleted 1,740 lines of code. The auth still works. Actually, it works better now. Here's the thing: I was verifying JWT tokens in two places. Frontend middleware doing crypto checks, then the backend doing the exact same thing again. The frontend can't be trusted anyway. It just needs to know one thing: "Is this token expired?" for routing. The backend handles real security when API calls happen. What changed: 110-line middleware → 25 lines 5 auth docs explaining complexity → 0 2 duplicate token endpoints → 1 clean pattern Same security. 10x clearer. Faster page loads. The most satisfying code you'll ever write is the code you delete.
4
49
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Kairocoin
0
6
SQLite(1)
Alexandre Machado's avatar
Alexandre Machado
PROGold Coast QLD, Australia
🚀 Expert React Developer 🌟
5.0
Rating
14
Followers
Cover image for Weekender: A full-stack e-commerce template built with React.
Weekender: A full-stack e-commerce template built with React.
0
2
Cover image for 🧠 From scattered tools to one clear control hub AI agencies...
🧠 From scattered tools to one clear control hub AI agencies often juggle multiple dashboards, spreadsheets, and CRMs — losing time and visibility in the process. I built Quantum Ops, a single command center that brings together clients, jobs, calendar, and analytics — turning daily operations from reactive to proactive. ⚡ Results: Up to 40 % less admin time Improved project visibility AI-ready foundation for analytics and automation Github repo below 👇 github.com/LXMachado/quantum-ops (https://github.com/LXMachado/quantum-ops)
2
15
147
Cover image for Quantum Ops - Agency Control Hub Dashboard
Quantum Ops - Agency Control Hub Dashboard
0
0
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Headless Shopify E-commerce Platform
0
18
SQLite(1)
Resa Qulyubi's avatar
Resa Qulyubi
Malang, Indonesia
Mobile/Web/AI Engineer • Backend & Cloud • Scalable products
109
Followers
Cover image for SQLite Database Recovery Tool Development
SQLite Database Recovery Tool Development
1
2
Cover image for Just launched an open-source Leaderboard API for game develo...
Just launched an open-source Leaderboard API for game developers! 🚀 Why I built this: Every game needs a leaderboard, but implementing one from scratch is time-consuming. This API handles all the heavy lifting! What it does: - Real-time player rankings - Player statistics & analytics - Daily/weekly/monthly leaderboards - Secure API authentication - Docker deployment ready - Complete API documentation Live & Ready: 🚀 API: https://api-leaderboard.qulyubis.biz.id 📖 Docs: https://api-leaderboard.qulyubis.biz.id/docs 📦 GitHub: github.com/Resaqulyubi/api-highscore-leaderboard 💡 Example game integrations coming soon! 100% FREE & OPEN SOURCE 🎉 Perfect for indie devs, game jams, or learning projects!
5
121
Cover image for What if a landing page could respond to your every move? 🤔 ...
What if a landing page could respond to your every move? 🤔 I just created an interactive experience that does exactly that! Move your cursor across the hero section and watch: - A flashlight effect that follows you - Particles that swirl toward your pointer - A hidden trophy revealed only under the light Smooth animations triggered as you scroll 👉 See it in live: https://creative-challenge-web.qulyubis.biz.id Which interactive element would you add next? I'm curious to hear your ideas! 💡 #WebDesign #InteractiveWeb #React #GSAP
6
314
Cover image for Today I built a website demo theme for Contra Space showcasi...
Today I built a website demo theme for Contra Space showcasing satellite technology and capabilities. Built with Next.js 14 (App Router), TypeScript, and Tailwind CSS, using React Three Fiber + Drei for 3D visuals and Framer Motion for smooth animations. Stack: Next.js 14 • TypeScript • Three.js • React Three Fiber • Drei • Framer Motion • Tailwind CSS • Lucide Icons Live demo: https://demo-web-space.qulyubis.biz.id/ -> feedback is welcome! Note: I’m currently waiting for my first client no projects yet, so I’m staying consistently productive. 🔥
2
309
SQLite(1)
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jorge ramos
Dallas, USA
Web developer building responsive web applications.
1x
Hired
1
Followers
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Waterlily Survey App Development
0
5
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Apex App Backend Server Development
0
1
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Vue 3 Starter Template Development
0
1
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Faik Irkham's avatar
Faik Irkham
Cilacap, Indonesia
Mobile App Developer | Flutter Expert
New to Contra
Cover image for Fluty POS A Fully Offline Point of Sale System Built entirel...
Fluty POS A Fully Offline Point of Sale System Built entirely with Flutter, this POS application is designed for small businesses that need a fast, lightweight, and reliable cashier system that works without any internet connection. Key Features: ✔️ 100% Offline – all data stored locally using SQLite ✔️ Product & category management ✔️ Fast and accurate transaction processing ✔️ Automatic inventory updates ✔️ Daily & monthly sales reports ✔️ Simple and responsive UI ✔️ Perfect for small shops, retail stores, coffee shops, and more
0
54
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The main focus of this project was a clean UI/UX, smooth animations (check out those subtle transitions!), and warm branding.
0
47
Cover image for FlutIoT is a Smart Home application built with Flutter, feat...
FlutIoT is a Smart Home application built with Flutter, featuring a modern, responsive, and cross-platform interface for both Android and iOS. Technology Stack: - Flutter & Dart for cross-platform development - Firebase Authentication for secure login - REST API / MQTT for IoT device communication -BLoC for state management - Flutter Charts for energy analytics visualization
0
121
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chart finance
0
99
SQLite(1)
Ahmed Fayaz's avatar
Ahmed Fayaz
Pakistan
Expert Kotlin Android Developer with 3+ Years Experience
4x
Hired
7
Followers
Cover image for Struggling multiple email accounts is a productivity killer....
Struggling multiple email accounts is a productivity killer. 😩 The constant switching between my Gmail for work, Outlook for personal projects, and that old Yahoo account... it was digital chaos. I knew there had to be a better way to manage it all. So, I decided to build the solution myself. I'm incredibly proud to introduce a project I've been pouring my energy into: a single, unified mailbox designed to bring all your inboxes into one clean, simple interface. This wasn't just a UI challenge. It meant diving deep into the protocols that run our digital lives: The result? One app. One inbox. Zero chaos. It's about reclaiming focus in a world of endless notifications. What's your biggest email headache you wish someone would solve? Let me know in the comments! 👇
4
24
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Cover image for 𝐅𝐫𝐨𝐦 𝐥𝐢𝐧𝐞𝐬 𝐨𝐟 𝐜𝐨𝐝𝐞 𝐭𝐨 𝐭𝐡𝐞 𝐟𝐫𝐨𝐧𝐭 𝐥�...
𝐅𝐫𝐨𝐦 𝐥𝐢𝐧𝐞𝐬 𝐨𝐟 𝐜𝐨𝐝𝐞 𝐭𝐨 𝐭𝐡𝐞 𝐟𝐫𝐨𝐧𝐭 𝐥𝐢𝐧𝐞𝐬 𝐨𝐟 𝐜𝐨𝐧𝐬𝐭𝐫𝐮𝐜𝐭𝐢𝐨𝐧. 𝐓𝐡𝐫𝐢𝐥𝐥𝐞𝐝 𝐭𝐨 𝐬𝐡𝐚𝐫𝐞 𝐭𝐡𝐞 𝐩𝐫𝐨𝐣𝐞𝐜𝐭 𝐈'𝐯𝐞 𝐛𝐞𝐞𝐧 𝐝𝐞𝐯𝐞𝐥𝐨𝐩𝐢𝐧𝐠: 𝐭𝐡𝐞 𝐂𝐚𝐭𝐥𝐢𝐧𝐠 𝐟𝐢𝐞𝐥𝐝 𝐦𝐚𝐧𝐚𝐠𝐞𝐦𝐞𝐧𝐭 𝐚𝐩𝐩. As an Android developer, the challenge was clear: how do you take the complex, often chaotic, world of a construction site and translate it into a seamless, powerful, and reliable mobile experience? Seeing complex workflows transform into an intuitive, high-performance Android application has been an amazing journey. Knowing this tool will help teams reduce errors, improve communication, and build more efficiently is what makes development so rewarding. Check out what we're building: 👉 𝐡𝐭𝐭𝐩𝐬://𝐰𝐰𝐰.𝐜𝐚𝐭𝐥𝐢𝐧𝐠𝐥𝐭𝐝.𝐜𝐨.𝐮𝐤/
0
22
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Ahmed Fayaz - Android Developer’s Post
3
8
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Smart Cal
2
13
SQLite(1)
Merbin J Anselm's avatar
Merbin J Anselm
Tirunelveli, India
SAP BTP Expert: NodeJS/Java - Fiori Elements/UI5🚀
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anselm94/googlekeepclone
0
2
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anselm94/cap-java-employee-management
0
22
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anselm94/cmis-grpc-server-client
0
18
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