Hamza Missaoui

Full-Stack Engineer with 4+ years shipping production TypeScript/JavaScript, React, and Node.js applications end-to-end on the MERN stack, with backend depth in Python (FastAPI) and Java (Spring Boot), and hands-on multi-cloud DevOps experience across AWS, Azure, and GCP (Kubernetes, Docker, Terraform, CI/CD). Builds AI coding tools and agentic systems (Claude, LangChain/LangGraph, RAG, MCP) directly into daily development and production features — work that cut manual QA effort by 40% and lifted output reliability by 30% on a recent engagement. Comfortable owning a feature end-to-end (frontend, backend, data model, cloud deployment) and translating business requirements into architecture that scales technically and organizationally.

Self-driven background as a solo founder and mentor — used to identifying gaps and shipping fixes without being asked.

Lead Full-Stack Engineer & CTO - DevScale Digital Solutions - Tunis, Tunisia

(2026-02)

• Own technical roadmap and architecture for a portfolio of SaaS and AI-native client platforms built on the MERN stack (MongoDB, Express.js, React, Node.js) with TypeScript, translating business requirements into a prioritized roadmap spanning 5+ initiatives.
• Integrate AI coding tools (Claude, Claude Code, LLM-driven scaffolding) into the daily development workflow for large, complex single-page applications and event-driven microservices — writing precise prompts, reviewing generated output, and adding automated self-correction/testing steps, improving output reliability by 30% and cutting manual QA effort by 40%.
• Direct multi-cloud DevOps delivery of scalable microservices supporting 1,000+ concurrent requests across 3+ concurrent client engagements — Kubernetes/Docker containerization, Terraform-managed infrastructure, and CI/CD pipeline design across AWS, Azure, and GCP.
• Set engineering standards for code review, testing, and data-flow design across production systems, working closely with stakeholders and cross-functional teams to keep features technically sound and shippable.

Full-Stack Developer - Independent / Freelance - Tunis, Tunisia

(2025-11 - 2026-02)

• Owned architecture, performance, and scalability decisions across 4+ client projects using the MERN stack (MongoDB, Express.js, React, Node.js) with TypeScript, working solo end-to-end from spec to deployment.
• Engineered backend services in Node.js/.NET Core, exposing optimized GraphQL and REST APIs backed by PostgreSQL and MongoDB with multi-level caching strategies and clear data models.
• Developed reusable, cloud-deployable UI components and Docker-based workflow modules using Tailwind CSS and Material UI, shortening project delivery timelines by 20% across engagements — partly by folding AI coding assistants into the build loop.

Full-Stack Developer - Go-Makkah - Tunis, Tunisia

(2025-08 - 2025-10)

• Architected a REST-based conversational AI service for reservations, support, and contextual inquiries, automating 70%+ of routine inquiries across multiple channels.
• Designed a semantic search engine and real-time recommendation system to improve conversion rates.
• Implemented validation pipelines using schema-constrained LLM outputs for structured, reliable API responses — direct experience specifying constraints tightly enough for AI-generated output to be trusted in production.
• Integrated Stripe and local bank payment methods with secure, event-driven webhooks.

Full-Stack Web Developer - B2B-Alive Ltd - Tunis, Tunisia

(2021-10 - 2025-06)

• Modernized legacy REST APIs into a unified, access-controlled GraphQL layer secured with SSO, OAuth2, and MFA, raising integration test coverage to 80%+ (Jest, Cypress) for a SaaS platform broadcasting to 10,000+ distributed devices (Shell, HP, Carrefour, Nissan).
• Rebuilt the front-end SPA with complex state management by migrating to React, TypeScript, Vite, and Tailwind CSS on Cloudflare Workers, cutting bundle size by 45% and roughly doubling interaction responsiveness.
• Implemented a queue-based transcoding pipeline (Redis, BullMQ) processing 5,000+ daily jobs using decouple-and-buffer patterns from cloud-native pub/sub messaging.
• Designed an event-driven fleet-monitoring system feeding a centralized ELK observability pipeline, enabling automated anomaly detection and cutting MTTR by 50%.
• Led containerization and multi-cloud CI/CD pipelines (Kubernetes, Docker, Terraform) across AWS and Azure, cutting deployment times by 30%.
• Set code quality standards, led code reviews, and mentored 3+ junior developers using Git-based workflows — raising the engineering bar across the team.

Final-Year Engineering Intern - B2B-Alive Ltd - Tunis, Tunisia

(2021-01 - 2021-09)

• Created a Canva-style drag-and-drop editor in React for remote management of digital content across 100+ screen players; integrated AWS S3 and Redis Pub/Sub, lifting automation by 35% and deployment efficiency by 60%.

Second-Year Engineering Intern - 3S Group - Tunis, Tunisia

(2020-07 - 2020-09)

• Developed network monitoring tools and telemetry dashboards, boosting incident detection speed by 40%.

B.S. - Software Engineering - Faculty of Sciences, Tunis, Tunisia (2018 - 2021)

B.S. - Chemical Engineering - Faculty of Sciences, Tunis, Tunisia (2017 - 2018)