Freelance Software Engineers in IndonesiaFreelance Software Engineers in Indonesia
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Resa Qulyubi's avatar
Resa Qulyubi
Malang, Indonesia
Mobile/Web/AI Engineer • Backend & Cloud • Scalable products
122
Followers
Mobile/Web/AI Engineer • Backend & Cloud • Scalable products
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. 🔥
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Cover image for I’ve open-sourced AI API Proxy,
I’ve open-sourced AI API Proxy, a lightweight gateway that standardizes calls to multiple AI providers through an OpenAI-style API. Why it matters: easier vendor switching, centralized keys/quotas, and response caching to cut latency and cost. 🔗 GitHub: https://github.com/Resaqulyubi/ai-api-proxy (https://github.com/Resaqulyubi/ai-api-proxy)🧪 Live example app: https://portfolio.qulyubis.biz.id/?app=16 Highlights: - One endpoint, many providers/models - Built-in caching + retries - Simple auth & rate limits per client - Logs/metrics for observability I’m looking for feedback & contributors. If you’d like to collaborate, DM me, and please ⭐ the repo! While I’m waiting for the first client, I’m staying consistent: weekly small ships-bug fixes, docs polish, new integration examples, and mini benchmarks. Progress over perfect.🔥
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Cover image for Hello e-commerce builders Today I’m exploring
Hello e-commerce builders Today I’m exploring how AI can power every step of a marketplace: discovery, conversion, trust & safety, ops, and retention. This demo shows the journey with ready-to-adopt workflows and a Seller Co-pilot. 🖥️ Try the live website: https://ai-demo1.qulyubis.biz.id/ (https://ai-demo1.qulyubis.biz.id/)Feedback welcome! 😊
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Cover image for Qulyubis Digital - App Portfolio Gallery | Flutter & Web Apps
Qulyubis Digital - App Portfolio Gallery | Flutter & Web Apps
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Software Engineer(6)
Mohamed AALABOU's avatar
Mohamed AALABOU
Bali, Indonesia
CEO and Founder | Blockchain Expert
$1k+
Earned
1x
Hired
6
Followers
CEO and Founder | Blockchain Expert
Cover image for Adswinner - Facebook Ads Scraper
Adswinner - Facebook Ads Scraper
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42
Cover image for Blink Pharma - Advanced solutions for the pharma industry
Blink Pharma - Advanced solutions for the pharma industry
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25
Cover image for Gofer - Sentiment analysis and AI coaching for customer support
Gofer - Sentiment analysis and AI coaching for customer support
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30
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Software Engineer(3)
Muh. Khaerul's avatar
Muh. Khaerul
proPurwokerto, Indonesia
Full-Stack Dev | TS, Go & C | Reverse Engineering
New to Contra
Full-Stack Dev | TS, Go & C | Reverse Engineering
Cover image for In 2024, I built Krungthai
In 2024, I built Krungthai Business ExpressTS, a backend API prototype/MVP for an Upwork client working around Krungthai Business workflows. The goal was to validate how an end-to-end business banking flow could be automated while the bank does not provide official open banking APIs. My approach started with reverse engineering the mobile app flow to understand the real request/response behavior, session handling, authentication steps, and the app’s end-to-end encryption flow. This included analyzing how encrypted payloads were structured, how secure client-server communication was handled, and how the mobile client interacted with backend services during the transaction process. From there, I designed an ExpressTS-based API layer that could reproduce the core E2E flow in a cleaner backend structure, making it easier to test, automate, and integrate with external systems. The prototype focused on validating the technical flow first before moving toward a more production-ready implementation. The first approach used an OTP-based transaction flow, but I later updated the implementation toward a PIN-based flow. This made the transaction process faster and smoother for repeated usage, with the PIN flow becoming around 2–3x faster than the OTP flow because it removed the delay of waiting for OTP delivery and validation. The GitHub repository was used as a prototype/demo version for the Upwork client, focused on validating the feasibility of automating Krungthai Business workflows. Tech stack: Node.js, TypeScript, ExpressTS, Axios, Mongoose, MongoDB, dotenv, pnpm, ts-node, nodemon. If you need someone who can build backend API prototypes, reverse engineer mobile/web flows, automate complex business processes, or create integration layers when official APIs are limited or unavailable, I can help turn the flow into a clean, testable, and scalable backend system. This was an independent prototype project for client validation and research purposes, not an official Krungthai Bank product or partnership.
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Cover image for Akamai Filehash Extractor Module
Akamai Filehash Extractor Module
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0
Cover image for HLVote: Mobile E-Voting Platform Development
HLVote: Mobile E-Voting Platform Development
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Cover image for PKLSkuy — Construction Worker Marketplace Platform
PKLSkuy — Construction Worker Marketplace Platform
0
0
Software Engineer(3)
William Kindlien's avatar
William Kindlien
Indonesia
Expert Full Stack iOS Developer📱💻
Expert Full Stack iOS Developer📱💻
Cover image for MoveItMate: WatchOS App
MoveItMate: WatchOS App
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23
Cover image for MemoTales : Family IpadOS App
MemoTales : Family IpadOS App
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Cover image for DishCovery: Solution to Personalized Diet
DishCovery: Solution to Personalized Diet
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Cover image for ElevateM3 : iPad Playground App
ElevateM3 : iPad Playground App
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9
Software Engineer(7)
Yusuf Badriawan's avatar
Yusuf Badriawan
Yogyakarta, Indonesia
Robotics Software Engineer | Reinforcement Learning | LLM | Simulation
5.0
Rating
2
Followers
Robotics Software Engineer | Reinforcement Learning | LLM | Simulation
Cover image for Key Achievements ✅ Seamless Real-World Navigation: The
Key Achievements ✅ Seamless Real-World Navigation: The robot now autonomously navigates dynamic spaces, avoiding obstacles and reaching destinations with precision—powered by ROS 2 Nav2 and our tuned path-planning algorithms. ✅ End-to-End AI Integration: Combining ChatGPT-4o, RAG, and Whisper, the robot answers contextual queries (e.g., “Where’s the lobby?”) and executes navigation tasks in one fluid workflow. Demo Highlights 1️⃣ Natural Language Interaction: Asked the robot for department info, and it responded instantly with accurate, AI-retrieved details. 2️⃣ Voice-Guided Navigation: Commanded, “Take me to Teleconference Room ”—the robot mapped the optimal path, dodged obstacles, and arrived autonomously. 3️⃣ Intuitive UI Feedback: The onboard interface displayed interactive prompts for users.
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Cover image for Autonomous Excavator using YOLO and Reinforcement learning
Autonomous Excavator using YOLO and Reinforcement learning
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4
Cover image for Voice-Guided Autonomous Robot Navigation with AI Integration
Voice-Guided Autonomous Robot Navigation with AI Integration
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7
Cover image for DQN Reinforcement Learning for Robot Navigation
DQN Reinforcement Learning for Robot Navigation
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4
Software Engineer(3)
Miftah Regyana's avatar
Miftah Regyana
Bandung, Indonesia
Efficient Backend Engineer for Scalable Solutions
Efficient Backend Engineer for Scalable Solutions
Cover image for Simba - Inventory & Asset Management
Simba - Inventory & Asset Management
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3
Cover image for Kias Design Interior
Kias Design Interior
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3
Cover image for POS Toko Laris
POS Toko Laris
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3
Cover image for Popcoat.id - Nail Art Appointment
Popcoat.id - Nail Art Appointment
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3
Software Engineer(7)
Rama Satriana's avatar
Rama Satriana
South Jakarta, Indonesia
Full Stack Developer | Business Systems & API Specialist
New to Contra
Full Stack Developer | Business Systems & API Specialist
Cover image for Healthcare CRM Overhaul: Laravel-Powered Sales Optimization
Refactored a healthcare CRM using Laravel to optimize sales workflows. Key Contributions: Sales Dashboard: Built real-time visualization for "Deals Won/Lost" and performance metrics. Smart Task Automation: Engineered productivity logic that auto-adjusts schedules based on national holidays. Data Integrity: Implemented director-level approval workflows for sensitive actions. Result: Streamlined sales operations with accurate performance tracking and improved data security.
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Cover image for Engineered a complex "Legal Drafting
Engineered a complex "Legal Drafting & Review" workflow within the HRIS using Laravel to enforce internal governance. Key Logic Implemented: Multi-Level Approval: Built a dynamic approval hierarchy involving Directors and HR Managers based on priority levels (High/Medium/Normal). Automated SLA: Programmed auto-cancellation logic that invalidates "Hold/Discussed" requests after 3 days of inactivity to prevent bottlenecks. Validation Rules: Enforced mandatory justification fields for High-Priority requests to ensure accountability.
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Cover image for Engineered a robust REST API
Engineered a robust REST API (Bridging) connecting the Hospital System (HIS) with BPJS Mobile JKN. Key Achievements: Standard Compliance: Built endpoints strictly adhering to BPJS technical specs for interoperability. Digital Queuing: Enabled real-time data exchange for mobile check-ins. Rigorous Testing: Validated 100% data accuracy and schema compliance using Postman. Security: Implemented secure token-based authentication. Result: Seamless integration allowing patients to book hospital queues via mobile app.
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Cover image for Built a high-performance corporate website
Built a high-performance corporate website with a custom backend engine (CMS). Key Contributions: Backend Architecture: Developed a custom CMS using Laravel to manage dynamic modules (Portfolio, Career, Blog) without relying on WordPress. Optimized Frontend: Delivered a fast-loading interface with JSON-based metadata retrieval. Media Handling: Implemented automated image resizing and processing on upload. nolka.id
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Software Engineer(5)