Karim Tounsi

Java Full Stack Developer with over 5 years of experience building modern web applications based on Spring Boot. I specialize in backend development, REST API design, implementing complex business logic, and building scalable systems using Spring Data JPA, Spring Security, and layered architecture.

I seamlessly integrate dynamic frontend elements using jQuery, JSP, Thymeleaf, Bootstrap, DataTables, and data visualization libraries, while developing modern user interfaces with React, Next.js, and TypeScript, building SPAs and complex analytical dashboards.

I develop AI-powered solutions using Spring AI, integrating large language models (LLMs) with backend applications, implementing content generation and analysis, data processing, and business process automation using AI model APIs. I have experience integrating AI into web applications (Spring Boot + REST) and designing scalable architectures for AI components. In personal projects such as OrderFlow, I build event-driven microservices using Apache Kafka and RAG-based AI solutions leveraging semantic search, pgvector vector databases, and local embedding models to generate context-grounded LLM responses with source citations.

I have experience building advanced reporting modules, Excel exports, data visualization, and process automation (e.g., alert systems, comparative data exports).
I use Selenium for test automation and web process automation, supporting application quality and stability.

Experienced in working with large, maintained codebases and in database design and optimization. I have built Chrome extensions and tools integrating data from external services. I have experience with integrations (Google OAuth2, Stripe) and cloud deployments.

Strongly focused on performance and optimization, particularly in writing efficient SQL queries, data processing, and leveraging multithreading to build fast and scalable solutions. Passionate about clean architecture, good programming practices (Clean Code), attention to detail, and delivering intuitive, user-friendly solutions.