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Mohamed amine Klai

@mohamedamineklai1

Full-Stack Developer at DecliTech building Declingo, a language-learning platform with authenticated REST APIs and role-based access.

Tunisia

Message

At DecliTech, I design and develop Declingo, a language-learning platform built with Next.js, Node.js, MongoDB, and TypeScript. I build authenticated REST APIs with role-based access control and improve performance and search visibility through caching, server-side rendering, and SEO optimization.

Across freelance work and internships at Horizop Energy and Digital Natives, I developed web applications for tourism, EV charging, and medical appointments. My projects include MyCoachTN, a SaaS platform for private coaches, and Deutschly, a German-learning platform.

Experience

Work history, roles, and key accomplishments

Current

Full-Stack Developer

Current

DecliTech

Oct 2025 - Present (1 year)

Design and develop Declingo, a scalable language-learning platform built with Next.js, Node.js, MongoDB and TypeScript. Build REST APIs serving thousands of authenticated requests, with secure session handling and role-based access control.

Next.js NodeJS MongoDB TypeScript REST APIs Docker SEO Optimization Clean Architecture

Full-Stack Developer

Freelance

Feb 2025 - Jun 2025 (4 months)

Delivered a full-stack web application with separate client and administrator portals for a tourism business. Built and maintained RESTful APIs with Node.js, Express.js and MongoDB, ensuring scalable and reliable backend services.

NodeJS ExpressJS MongoDB Next.js React TypeScript Tailwind WebSockets JWT RBAC

Full-Stack Developer Intern

Horizop Energy

Sep 2024 - Dec 2024 (3 months)

Developed a full-stack platform for managing EV charging infrastructure as the graduation project. Designed a modular, scalable architecture with Angular, Node.js, Express.js and MongoDB.

Angular NodeJS ExpressJS MongoDB JWT Google Maps API CI CD

Software Engineer Intern

Digital Natives

Jul 2023 - Sep 2023 (2 months)

Developed a medical appointment booking platform with dedicated dashboards for patients, doctors and administrators. Implemented secure authentication and authorization with Spring Security and HttpOnly cookies.

Spring Boot NodeJS PostgreSQL Spring Security Swagger OpenAPI RBAC