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Letlhogonolo FanampeLF

Letlhogonolo Fanampe

AI Solutions Engineer | RAG & Chatbot Specialist |

€347/day
Pretoria, ZA
3-7 years

Average response time: 1 hour

About Letlhogonolo

I bridge the gap between complex AI technology and reliable business solutions. Specializing in RAG (Retrieval-Augmented Generation), LLMs, and Automation, I build robust chatbots and data tools using Python, LangChain, and FastAPI. My focus is not just on making it work, but on making it accurate through rigorous QA.
  • English

    Native or bilingual

  • Tswana

    Native or bilingual

Can work on-site
Pretoria (up to 50km)

Experience

  • Outlier.ai
    I Quality Assurance & RLHF Engineer
    July 2024 - October 2025 (1 year and 3 months)
    Acted as a specialized AI Trainer and Quality Assurance Engineer, focusing on Reinforcement Learning from Human Feedback (RLHF) to improve Large Language Models (LLMs).

    Adversarial Testing: Conducted rigorous "red-teaming" to identify model hallucinations and safety risks, proactively tricking the model to find flaws.

    Code Evaluation: Created "gold standard" Python code solutions to train the model on correct syntax, logic, and efficiency.

    Performance Improvement: Evaluated model outputs against strict quality guidelines, directly contributing to increased accuracy and reduced bias in the final deployment.

    Python Generative AI Quality Assurance artificial intelligence RLHF
  • Kwantu PTY LTD
    AI Solutions Engineer (RAG Specialist)
    October 2024 - April 2025 (6 months)
    Cape Town, South Africa
    Designed, built, and deployed enterprise-grade AI chatbots using Retrieval-Augmented Generation (RAG).

    RAG SQL Chatbot: Developed a system using LangChain to allow users to query a complex SQL database using natural language (e.g., for infrastructure projects in Malawi).

    QA & Validation: Built automated testing scripts to compare AI-generated answers against ground-truth database records, identifying and fixing hallucinations.

    Infrastructure: Deployed the full stack (React frontend, FastAPI backend) on a CentOS server, configuring Nginx, Supervisor, and Docker for production stability.

    Tech Stack: Python, LangChain, OpenAI API, PostgreSQL/SQLite.

    Langchain RAG FastAPI SQL DevOps
  • Translated
    AI Prompt Engineer & Evaluator
    October 2024 - December 2024 (2 months)
    Optimized AI model performance for a major GPU enterprise client, focusing on high-stakes domains (Medical, Legal, Finance).
    Prompt Engineering: Refined complex prompts to ensure model outputs met strict industry standards for accuracy and tone.

    RLHF Application: Applied human feedback techniques to rank and improve generated responses, reducing error rates in specialized technical queries.

    Prompt engineering NLP Data analysis Evaluation

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Education

  • National Diploma: Analytical Chemistry
    Tshwane University of Technology
    2015
    National Diploma: Analytical Chemistry
  • National Senior Certificate: Grade 12
    Pretoria Technical High School
    2009
    National Senior Certificate: Grade 12

Skill set

Categories