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Omar Hajjouji

@omarhajjouji

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I build production AI platforms using LLMs, RAG, speech systems, and scalable Python backends.

Spain

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At TopDoctors Spain, I built AI MVPs from concept to production, including clinical RAG systems, real-time transcription, and multi-agent voice appointment booking. I designed Python and FastAPI microservices that integrated LLMs, speech processing, analytics, and healthcare applications.

I turn unstructured clinical data into schema-constrained FHIR outputs and deploy reliable AI services with Docker, Kubernetes, GCP, and BigQuery. Earlier, I developed multilingual real-time speech-to-text systems through NVIDIA Riva and delivered end-to-end full-stack AI solutions.

Experience

Work history, roles, and key accomplishments

AI Systems & Backend Engineer

TopDoctors Spain

Dec 2022 - Mar 2026 (3 years 3 months)

Designed and implemented multiple AI MVPs from concept to production, owning system architecture, backend development, AI integration, and production deployment. Built and maintained backend microservices integrating LLM systems, RAG pipelines, speech processing, and analytics into healthcare applications.

Python fastAPI LLM RAG Speech Processing BigQuery Docker Kubernetes FHIR SNOMED CT MCP

AI & Speech Systems Engineering Intern

BeHIT Spain

Jun 2022 - Dec 2022 (6 months)

Developed a multilingual real-time speech-to-text system using NVIDIA Riva as part of the NVIDIA Early Access Program, achieving ~7% WER through domain-specific fine-tuning. Configured GCP GPU servers and built low-latency streaming pipelines with gRPC and backend APIs.

NVIDIA Riva Speech to Text GCP gRPC Docker Kubernetes Python

Head of Mentoring Department

Data CoLab

Feb 2020 - Jun 2022 (2 years 4 months)

Led and managed a data science mentoring team, overseeing curriculum design, workshop planning, and quality assurance across AI and machine learning training programs. Supervised student-led ML and AI projects, providing technical guidance on model development and evaluation.

Data Science Machine Learning Mentorship Curriculum Design Project supervision

Data Science Instructor

Data CoLab

Feb 2020 - Jun 2022 (2 years 4 months)

Delivered Data Science training with a strong emphasis on mathematical and statistical foundations, including linear algebra, probability, statistics, optimization, and the theoretical principles behind machine learning algorithms. Supervised students throughout the design and implementation of Data Science and machine learning projects.

Data Science Machine Learning Linear Algebra Probability Statistics Optimization Teaching

Full Stack Developer

Naza Dev Solutions

Sep 2021 - May 2022 (8 months)

Designed, architected, and delivered end-to-end digital solutions, combining full-stack development, artificial intelligence, cloud services, and modern DevOps practices. Worked directly with clients to understand business needs and ensure successful project delivery.

Fullstack Development AI Cloud Services DevOps

Preventive Maintenance Intern

Airbus

Jul 2021 - Aug 2021 (1 month)

Developed a predictive maintenance solution that anticipates equipment failures, identifies components needing replacement, recommends maintenance actions, and generates optimized maintenance plans based on estimated remaining time before breakdown.

Predictive Maintenance Data Analysis Machine Learning

IT Support

Tunisianet

Oct 2020 - Mar 2021 (5 months)

Managed customer complaints and technical support requests, diagnosed equipment and installation issues, restored system functionality, and implemented effective solutions to ensure operational continuity and customer satisfaction.

Technical Support Troubleshooting Customer Service

Blogger

The Technical

Aug 2016 - Oct 2017 (1 year 2 months)

Researched emerging technologies and wrote informative articles to explain new trends, tools, and innovations to technical and non-technical audiences.

Research Writing Technology Trends