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Victor SantosVS

Victor Santos

AI Engineer

€350/day
Madrid, ES
3-7 years

Average response time: 1 hour

About Victor

I build production-ready AI applications that turn machine learning and large language models into reliable, user-facing products.

I have 4+ years of experience in data-driven solutions. With a strong focus on Generative AI, multimodal models, RAG systems, AI agents, model evaluation, and cloud deployment.

Most recently, I developed and deployed a multimodal question-answering platform for charts. The application combines a React interface, Python API, persistent multi-turn conversations, authentication, response streaming, layered AI safety controls, observability, and cost management. I also worked on fine-tuning and serving a vision-language model for chart understanding.

I can help clients with:

• LLM and multimodal AI application development
• RAG chatbots and private knowledge bases
• AI agents, tool calling, and workflow automation
• Document and image processing pipelines
• Python APIs and AI SaaS MVPs
• Model evaluation, guardrails, and observability
• Docker and cloud deployment on Google Cloud Platform

My approach goes beyond building a basic LLM wrapper. I focus on reliability, maintainable architecture, data isolation, security, testing, and clear communication throughout the project.

Main technologies: Python, PyTorch, Transformers, Flask, FastAPI, React, PostgreSQL, Redis, Docker, Google Cloud Platform, LangGraph, vector databases, and REST APIs.

I work fluently in English and Portuguese and can also collaborate in Spanish.
  • English

    Native or bilingual

  • Spanish

    Conversational

  • German

    Basic

  • Portuguese

    Native or bilingual

Remote only
Primarily works remotely

Experience

  • TURING
    Senior Data Scientist
    October 2024 - Today (1 year and 10 months)
    Palo Alto, United States
    – Designed and built a custom multi-agent system with a writer/reviewer closed loop to author and validate structured QA prompts, using strict source-grounding to prevent hallucination, separation-of-duties review, and an automated similarity/validation gate. – Built an embedding-based semantic quality pipeline for prompt-dataset evaluation, detecting duplicate and low-diversity samples before delivery. – Developed and improved model-training processes, including new features and fixes for production ML workflows.
    AI Agent Generative AI QA testing Python
  • Turing inc
    Squad Lead
    January 2025 - November 2025 (10 months)
    Palo Alto, United States
    – Developed structured training data and reasoning workflows for SWE Agents specialized in software debugging and development. – Built a real-time ML pipeline combining Random Forest prediction with Heavy-Light Decomposition for city traffic analytics (proof of concept). – Built a multi-band real-time audio-processing case study using a hybrid segment / binary-tree data structure. – Produced game development, physics simulations, and audio processing assets for RLHF model training. – Technical leadership and Pod management: task review, performance tracking, and mentoring of new trainers; automation via web scraping, Bash, and CLI tooling. – Results: Promoted to Squad Lead within 3 months for high performance; led the 2nd best-performing squad in the team and trained several new trainers, directly driving team growth.
    Data Generation Python Scikit-learn scrapping
  • Turing Inc.
    Backend QA
    December 2025 - Today (8 months)
    Palo Alto, United States
    – Designed and implemented automated test pipelines for FastAPI services, database integrity, and RBAC using Python, SQLAlchemy, and Docker. – Optimized backend performance and error handling (recursion protection, circular-reference detection); ran PR reviews, bug-lifecycle management, and production-fix validation. – Results: Reduced response time from 7+ seconds to < 0.1s for circular-reference detection, and contributed to one-shot delivery quality that minimized rework cycles.
    QA testing Python FastAPI Docker SQL

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Education

  • Postgraduate, Machine
    FIAP
    2026
    Postgraduate, Machine
  • B.Sc.
    Universidade Federal da Paraíba (UFPB)
    2023
    B.Sc.

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