Lab-O-Matic - Professional LIMS
Overview
Web application for industrial laboratory management. Sample tracking, analysis planning and automated report generation. Freelance mission in production.
Project Context
The project unfolded in two phases: a 2nd-year engineering internship of 4 months in April 2025 to develop the MVP and establish technical foundations, then an autonomous freelance mission started in September 2025 to extend features, integrate external systems, and ensure production deployment.
Responsibilities
- Requirements analysis and fullstack architecture design
- Complete backend (NestJS) and frontend (Next.js 15) development
- Integration with Firebase Auth and external services
- Production deployment and ongoing maintenance
Technical Architecture
Backend Stack
- NestJS: Enterprise Node.js framework with modular architecture
- Prisma ORM: PostgreSQL management with complete type-safety
- Swagger/OpenAPI: API documentation and automatic SDK generation
- Firebase Admin: Authentication and user management
Frontend Stack
- Next.js 15 + React 19: SSR, Turbopack, modern optimizations
- Tailwind CSS v4 + shadcn/ui: Design system with Radix UI components
- TanStack Query: Intelligent cache and server synchronization
- Zustand: Lightweight and performant state management
- React Hook Form + Zod: Robust form validation
Infrastructure
- Docker: Containerization for reproducible environments
- Google Cloud Platform: Hosting with automated CI/CD
- Auto-generated SDK: Complete type-safety frontend ↔ backend
Main Features
Laboratory Management
- Complete sample tracking with traceability
- Real-time analysis planning and assignment
- Automatic compliant PDF report generation
- Dashboards with operational KPIs and metrics
- Data export (Excel, CSV)
User Experience
- Intuitive interface with dark/light mode
- Responsive design (desktop, tablet, mobile)
- Loading time < 2s thanks to SSR and code splitting
- Real-time notifications and progress indicators
Security
- Firebase authentication with secure sessions
- Double validation (client + server) with Zod
- End-to-end type-safety (TypeScript)
- Unit and integration tests (Jest, NestJS Testing)
Technical Challenges
Scalable architecture: Clear frontend/backend separation, DB query optimization and cache strategy with TanStack Query to maintain performance.
Data synchronization: Complex state management between client, server and DB with optimistic updates for reactive UI and intelligent concurrent conflict resolution.
External integrations: Firebase Authentication integrated into NestJS, transactional email system (Brevo) with fine-grained template and error management.
Developer Experience: Auto-generated SDK from OpenAPI, instant hot reload (Turbopack), strict tooling (ESLint, Prettier, TypeScript).
Results & Impact
Successful deployment: Application in production used daily with high stability, active monitoring and optimal performance.
Business value: Manual process automation, complete traceability, compliant reports, scalable architecture.
Professional experience: First client project from design to deployment, autonomous management validated by internship → freelance transition, expertise on modern production-ready stack.
Technologies Used
Frontend: Next.js 15, React 19, TypeScript, Tailwind CSS v4, shadcn/ui, TanStack Query, Zustand, React Hook Form, Zod
Backend: NestJS, Prisma ORM, PostgreSQL, Swagger/OpenAPI, Firebase Admin, Brevo
DevOps: Docker, Google Cloud Platform, CI/CD, Git, npm, ESLint, Prettier