const letruc = {
role: "Full-Stack Developer",
location: "Hoan Kiem, Vietnam 🇻🇳",
currentFocus: ["CRM Systems", "Scalable Web Apps", "Clean Architecture"],
experience: {
frontend: ["React", "Next.js"],
backend: ["NestJS", "Laravel", ".NET Core"],
database: ["MySQL"],
tools: ["Git", "GitHub"]
},
projectsDelivered: 2,
usersServed: "5K - 10K",
motto: "Code with purpose, ship with confidence 🚀"
};- 🔭 Currently working on outsourced CRM systems serving 5K – 10K users
- 🌱 Learning Angular, CI/CD workflows, and Proxmox (homelab/virtualization)
- 🎯 Next goals: System Design, Microservices, and Cloud-native architectures
- 💡 Passionate about clean code, clear architecture, and performance optimization
- 📫 Contact: letruc.work@gmail.com
- ⚡ Fun fact: "Solving real business problems is more fun than chasing trends."
🚀 Current journey: expanding from frontend → fullstack → infrastructure & homelab. I believe understanding the entire stack helps build better products.
🔒 Note: Both projects below are outsourced under client contracts.
Due to NDA (Non-Disclosure Agreement) terms, I cannot publicly share source code, client names, screenshots, or specific technical details. The information below is a high-level overview of scope and role only.
An outsourced CRM system serving enterprises with a comprehensive finance & accounting module.
🎯 Key Features
- 👥 User management with RBAC permissions
- 💰 Enterprise finance & accounting management
- 💳 Payment processing (payment gateway integration)
- 🌳 Multi-level marketing (MLM) commission with multi-tier genealogy tree
- 📊 Real-time dashboards & reporting
- ⚡ Realtime updates via WebSocket (live notifications, dashboard data, transaction status)
- 🚀 Redis caching for high-frequency reads, session storage & rate limiting
👨💻 My Role
- 🎨 Owned 100% of the frontend (Next.js) – from UI/UX design to performance optimization
- 🤝 Collaborated directly with the Python (FastAPI) backend team and PHP WordPress API team
- 🗣️ Worked directly with the client to finalize business logic and UI requirements
- 🔄 Reviewed and proposed improvements to the data flow between frontend and backend
- 🔌 Integrated WebSocket client on the frontend for realtime data sync across modules
🧱 Tech Stack
🔐 Source code and client details are not publicly available due to contractual obligations.
A second outsourced CRM system focused on user management and large-scale payment flows.
🎯 Key Features
- 🔐 User management with multi-role authentication
- 🧾 Accounting management & transaction reconciliation
- 💸 Payment gateway integration & transaction processing
- 🌳 Multi-level marketing (MLM) module – commission calculation & tree visualization
- 📈 Performance optimization for systems with high concurrent user load
- ⚡ Realtime processing via WebSocket – instant payment status, balance updates & user notifications
- 🚀 Redis caching for hot data (user sessions, MLM tree, transaction lookups) to reduce DB load under high concurrency
👨💻 My Role
- 🎨 Owned 100% of the frontend (Next.js) – component architecture, state management, performance tuning
- 🤝 Collaborated with the Python (FastAPI) backend team for the core API and PHP WordPress for the MLM commission module
- 🗣️ Worked directly with the client to deeply understand business logic and finalize UI/UX expectations
- 🧩 Proposed API and UI structures suited for 5K+ concurrent users
- 🔌 Implemented WebSocket client with reconnect strategy and event-driven UI updates for realtime flows
🧱 Tech Stack
🔐 Source code and client details are not publicly available due to contractual obligations.
💬 Want to know more? If you're interested in specific experiences (architecture, performance handling, payment integration, etc.), feel free to reach out via email — I'm happy to share whatever the NDA permits.
💡 "These two CRM projects weren't just a financial milestone — they've been my biggest real-world classroom so far."
- 💵 Earned $15,000+ from 2 outsourced projects at just 20 years old – my first major financial milestone in my programming career.
- 🌟 Proved my ability to work independently and take 100% ownership of the frontend for real-world systems serving 5K – 10K users.
🎨 Frontend Mastery
- Deeper grasp of Next.js: SSR, ISR, App Router, performance optimization
- State management for complex systems with dozens of modules
- UI/UX thinking when working directly with clients – translating business needs into interfaces
🐳 Docker & DevOps (new skills picked up from these 2 projects)
- Containerizing Next.js applications and packaging consistent dev/staging/production environments
- Writing Dockerfile & docker-compose for multi-service stacks (Next.js + FastAPI + WordPress + MySQL)
- Deeper understanding of image layering, multi-stage builds, and image size optimization
🌐 Networking & Infrastructure
- 🔁 Reverse Proxy (Nginx): routing multiple services under one domain, handling SSL termination
- ⚖️ Load Balancing: distributing traffic for systems with high concurrent user load
- 🔌 Networking fundamentals: DNS, ports, internal container networking, firewall rules
- 🛡️ Configuring rate limiting, CORS, and security headers at the proxy layer
- 🗣️ Client communication: locking down requirements and pushing back appropriately on unrealistic asks
- 🤝 Cross-team collaboration: working with Python and PHP WordPress backends despite different stacks
- ⏰ Deadline management: delivering on contractual commitments for both projects
- 🧠 Systems thinking: seeing the "big picture" instead of just coding components
