Hermes Nguefack

Design, development, and deployment of a high-performance distributed architecture for file processing, including complex subscription and quota management.

Frontend (React.js): Development of a modern SPA with React Context API (Auth, Theme, Subscription). Implementation of dynamic dashboards, real-time quota progress bars, and integration of FingerprintJS for secure tracking of unauthenticated users.

Backend & API (Node.js/Express): Secure REST architecture (JWT, RBAC) managing massive data flows.

Distributed Processing (Python & Kafka): Orchestration of specialized Python workers via Apache Kafka. Segmentation of message flows by priority (Topics: Free, Pro, Business) and monitoring.

Storage & Cloud (MinIO & Kubernetes): Containerized deployment on a Kubernetes cluster. High-availability object storage management with MinIO for temporary file persistence and volume management (PV/PVC).

Monetization (Stripe): Complete integration of the Stripe lifecycle

Collaborative Space (Shared Folders): Implementation of a shared folder system with fine-grained permission management (Owner, Admin, Editor, Viewer) and sharing via secure tokens.

DevOps & Quality: Setup of automatic cleanup pipelines (Cron Jobs), centralized logging,

"Modernization of the deployment infrastructure through the implementation of a self-hosted PaaS solution (Coolify)."

Multi-Server Architecture: Deployment and configuration of Coolify on a dedicated master server for infrastructure management.

CI/CD Automation: Setup of continuous deployment pipelines connected to Git repositories, with strict isolation of environments (Staging, Production) on remote nodes via SSH.

Containerization & Standardization: Design of multi-stage Dockerfiles to optimize image size and environment security.

Ushuru, a SaaS web application for invoice management dedicated to service providers and artisans. The objective: to offer a simple, secure, and efficient solution for managing quotes, clients, and invoices while monitoring performance in real-time.

Backend (Java / Spring Boot)

Development of REST APIs for complete management of clients, invoices, taxes, and services.

Implementation of secure authentication (JWT, OAuth2) and role management (Admin, Employee, Client).

MySQL database modeling (Hibernate, Liquibase)

Performance optimization using Redis for caching and query acceleration.

Frontend (Angular)

Design of an intuitive interface with an Admin Back Office and a Client space.

Creation of automatic PDF invoices with a complete history and status management (draft, validated, paid, canceled).

Development of an analytical dashboard showing revenue, monthly statistics, and exportable reports.

DevOps & Cloud – AWS

Complete containerization with Docker.

Setup of an automated CI/CD pipeline with GitHub Actions (build, tests, deployment).

Cloud deployment on AWS:

EC2 for backend hosting.

S3 for PDF file and asset storage.

RDS (MySQL) for the database.

CloudFront for secure and fast frontend distribution.

Monitoring and logs via CloudWatch.

Quality & Documentation

JUnit unit tests, Postman/Newman integration tests, and SonarQube quality analysis.

I contributed to the evolution and maintenance of a service platform dedicated to foreign students, aiming to simplify their administrative procedures and integration in France. My role focused on API reliability, monitoring, and system performance optimization.

Backend & API (Node.js / NestJS)

Development and maintenance of RESTful APIs.

Implementation of secure JWT authentication and robust role management.

Optimization of response times and server stability.

Frontend (React.js)

Development and improvement of user interfaces (Front and Back Office).

Seamless integration with APIs and enhancement of user experience.

Data (PostgreSQL / Prisma / Supabase)

Relational database modeling and management.

Use of Prisma ORM to simplify interactions and ensure data consistency.

Utilization of Supabase for real-time management and authentication.

DevOps & Monitoring

Creation and maintenance of CI/CD pipelines with GitLab CI.

Containerization of services with Docker.

Configuration of comprehensive monitoring (Prometheus, Grafana) with proactive production alerts.

Quality & Methodology

Writing unit tests (Jest) and functional tests (Postman).

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