L

Leonel Alejandro Salazar Ramirez

About

Detail

Tequila, Jalisco, Mexico

Contact Leonel regarding: 
id_card
Internships
Starting at USD2.8k/month
person_search
Finding candidates
connect_without_contact
Finding mentors
Finding co-founders
groups
Networking

Timeline


work
Job

Résumé


Jobs verified_user 0% verified
  • Freelancer
    Senior AI Engineer
    Freelancer
    Mar 2024 - Current (2 years 8 months)
    • Created and delivered end-to-end LLM-based solutions including conversational assistants, document intelligence platforms, and workflow automation tools across multiple domains
    • Built production-ready Retrieval-Augmented Generation (RAG) systems using LangChain and LlamaIndex, integrating vector databases (ChromaDB, Weaviate) for semantic search over large unstructured datasets
    • Enhanced data ingestion pipelines for PDFs, APIs, and databases, including chunking, embedding, indexing, and retrieval optimization
    • Fine-tuned open-source LLMs using LoRA/PEFT, improving domain adaptation and response quality for specialized use cases
    • Engineered robust prompting strategies, including system prompts, multi-step reasoning,
  • S
    Senior AI Engineer
    Santoli Connected Network
    Feb 2021 - Mar 2024 (3 years 2 months)
    • Led the design and implementation of LLM-driven and NLP systems for semantic search, summarization, and intelligent automation workflows
    • Architected and deployed RAG pipelines, combining structured databases and unstructured document sources to enhance knowledge retrieval
    • Built training and evaluation pipelines, improving model performance across key metrics (F1, BLEU, ROUGE) through iterative tuning and experimentation
    • Developed scalable AI microservices using FastAPI, Docker, and gRPC within a distributed system architecture
    • Optimized model inference and serving pipelines, reducing latency and improving throughput in production environments
    • Applied experiment tracking and model lifecycle management usi
  • H
    AI Engineer
    HUBBERS
    Dec 2018 - Jan 2021 (2 years 2 months)
    • Expanded and deployed machine learning models for classification, regression, and recommendation systems
    • Built NLP pipelines for text preprocessing, tokenization, feature extraction, and downstream tasks such as sentiment analysis and entity recognition
    • Performed feature engineering and data preprocessing on large datasets, improving model input quality and performance
    • Trained models using PyTorch, TensorFlow, and Scikit-learn, applying hyperparameter tuning and cross-validation techniques
    • Designed and enforced data pipelines (ETL/ELT) for model training and evaluation workflows
    • Integrated ML models into production APIs, working closely with backend teams
    • Monitored model performance and retrained
  • MassMutual
    Backend Developer
    MassMutual
    Nov 2017 - Nov 2018 (1 year 1 month)
    • Planned and implemented scalable backend systems and RESTful APIs using FastAPI and Flask
    • Built microservices architectures to support modular and high-availability applications
    • Improved and optimized database systems using PostgreSQL, MongoDB, and Redis, including indexing and caching strategies
    • Improved application performance through query optimization, caching, and load balancing techniques
    • Executed authentication and authorization systems using OAuth2 and JWT
    • Deployed and maintained services in Linux-based environments with Nginx and Apache
    • Collaborated with frontend and product teams to deliver robust, user-facing features.