Professional_Profile
Engineering
Scalable Web Platforms
I'm Rahmouni Oussama, a Senior Full-Stack Engineer with a strong backend focus, specializing in building scalable Web platforms using NestJS, Node.js, and modern web technologies. With 3+ years of experience, I design event-driven systems, real-time applications, and production-grade architectures, while also teaching AI/ML and Software Engineering part-time.
Technical_Specialization
Engineering Depth.
Backend_Platform
- NestJS & Node.js
- Event-Driven Microservices
- WebSockets & Real-Time APIs
- REST & GraphQL
- PostgreSQL & Redis
Cloud_&_Infrastructure
- AWS (EC2, S3, RDS, CloudFront)
- Message Queues (SNS / SQS patterns)
- Docker & Containerized Services
- Linux Server Administration
- Nginx & Process Management
AI_Platform_Engineering
- OpenAI API Integration
- AI-Driven Backend Services
- Python Prototyping for ML
- Event-Driven AI Pipelines
- Production AI Deployment
Reliability_&_Delivery
- GitHub Actions CI/CD
- Automated Testing (Jest)
- Observability & Logging
- Infrastructure as Code (early stage)
- System Design & Scalability
Engineering_Philosophy
How I Build.
Building systems that scale gracefully under load while maintaining developer velocity
Prioritizing observability and operational excellence from day one
Designing for failure - systems should degrade gracefully, not catastrophically fail
Balancing technical debt with business needs through intentional trade-offs
Professional
Journey.
Building increasingly complex systems while mentoring teams and driving technical excellence.
2025 – Present
Founder & Full-Stack Engineer @ RAHMOUNIDEV LLC
- Architected and deployed scalable backend services using NestJS, TypeORM, and PostgreSQL
- Designed event-driven microservices for subscription billing using AWS SNS/SQS-style messaging
- Built real-time user dashboards with WebSocket-based live updates
- Implemented CI/CD pipelines with GitHub Actions, automated testing, and production observability
- Integrated Stripe subscriptions, webhooks, and payment flows for SaaS products
06-2022 – 06-2025
Full-Stack Developer & Technical Consultant @ Apprentus (International Clients)
- Built and maintained full-stack web applications using React, Node.js, Express, MongoDB, and MySQL
- Improved frontend performance by 40% through code splitting, caching, and rendering optimization
- Developed Stripe-powered e-commerce and payment systems for international clients
- Designed and operated RESTful APIs supporting high-volume financial transactions
- Mentored junior developers on clean code, testing, and backend architecture using Jest and best practices
2025 – Present
AI/ML & Software Engineering Instructor (Part-time) @ Masterclass Denden
- Taught AI/ML system fundamentals, backend architecture, and cloud deployment to remote students
- Built educational prototypes using event-driven architecture and real-time data flows
- Demonstrated AI-driven backends using NestJS, Python tooling, and OpenAI APIs
- Introduced Docker, AWS, and CI/CD workflows for production-style AI deployments
06-2025 - 10-2025
Full-Stack Engineer — CI/CD & Automation (contractual) @ DEF TUNISIE
- Built CI/CD pipelines for Salesforce using GitHub Actions, SF CLI, Bash, and Node.js
- Reduced deployment time from 4 hours to 45 minutes through automated metadata workflows
- Eliminated environment drift across dev, UAT, and production with scripted deployments
01-2022 - 10-2022
Full-Stack Engineering Instructor @ Masterclass Denden
- Taught MERN stack (MongoDB, Express, React, Node.js) to 30+ students
- Covered Git, REST APIs, authentication, database modeling, and cloud deployment.
Technical_Projects
Building Systems.
SovereignStack AI Platform
Self-hostable RAG platform for AI startups built with event-driven architecture
Processes 2M+ queries monthly with 99.95% uptime across 50+ deployments
Real-Time Analytics Engine
WebSocket-based platform processing 10K events/second with sub-100ms latency
Reduced data processing latency by 65% compared to batch processing systems
Distributed Caching Layer
Multi-level caching system with Redis and in-memory strategies
Reduced database load by 80% while maintaining cache consistency across regions
Infrastructure as Code Library
Reusable Terraform modules for AWS deployments with CI/CD integration
Standardized deployments across 15+ projects reducing setup time from 4 hours to 15 minutes
Bachelor in Computer Science & Multimedia
ISAMM University • 2018 - 2021
Relevant Coursework
- Distributed Systems & Cloud Computing
- Database Theory & Advanced SQL
- Algorithms & Data Structures
AWS Certified Solutions Architect
Expected Completion: March 2026
Studying VPC design, multi-AZ deployments, cost optimization patterns
System Design Mastery
Deep diving into distributed systems patterns
Consistent hashing, leader election, distributed consensus algorithms
Open Source Contributions
Contributing to NestJS ecosystem and infrastructure tools
Focus on observability, testing patterns, and documentation