Dian Erdiana

Fullstack Developer

• Redesigned system architecture based on business workflow analysis using React.js and Express.js.
• Improved system performance by 45% through architectural refactoring and optimized database queries.
• Achieved stable production operation with 1,800+ concurrent users while reducing infrastructure and tooling costs by 30%.

Fullstack Developer

• Built end-to-end POS and OKR system features using Laravel, React.js, and PostgreSQL.
• Implemented frontend, backend logic, REST APIs, and database operations in production systems.
• Improved transaction and data processing performance by 35% through optimized UI flows and backend logic.

3D Laser Operator

• Operated precision 3D laser machining systems with a strong focus on accuracy and process consistency.
• Applied structured workflows and disciplined execution in a high-standard Japanese engineering environment.

Dicoding x DBM Skillsbuild Capstone Project

Kopilot Backend

Built a production-ready backend service for F&B business operations, providing authentication, master data management, transactions, stock tracking, file-based transaction import, operational insights, and ML-powered forecasting for internal dashboards.

Tech Stack: NestJS, TypeScript, PostgreSQL, Prisma, Redis, JWT, bcrypt, Google Gemini, Axios, CSV/XLSX processing

Designed as a centralized API for users, roles, stores, products, ingredients, recipes, notifications, reports, and predictive analytics with a scalable modular architecture.

Smartbridge Capstone Project

Book Doctor App

Built a healthcare booking platform that connects patients, doctors, and administrators, enabling doctor discovery, appointment scheduling, secure document uploads, and centralized management of medical services.

Tech Stack: React 19, TypeScript, Vite, TanStack Router, TanStack Query, Axios, TailwindCSS v4, Express.js, MongoDB, Mongoose, Zod, JWT, Multer

Streamlined appointment workflows with patient and doctor dashboards, role-based access control, doctor approval and schedule management, and admin tools for users, specialists, appointments, and reviews.

Dicoding Course Project

Forum Discussion API

Developed a production-grade RESTful API for a forum discussion platform, applying Clean Architecture principles to separate domain logic, use cases, and infrastructure concerns, with automated quality gates via CI/CD and Git hooks.

Tech Stack: TypeScript, Node.js (ESM), Express.js, PostgreSQL, JWT, bcrypt, Vitest, Husky, lint-staged, GitHub Actions

Enforced strict layered architecture from Domains to Applications, Infrastructures, and Interfaces with dependency injection, JWT-based authentication, refresh token rotation, and a CI pipeline with type-checking, linting, testing, and auto-deploy.