Wavian

Freelancer

Ericsson • Freiberufler

Aug 2017 - Apr 2026 • 8 yrs 8 mos

GenAI & LLM Solutions: Hands-on expertise in building Generative AI applications using LLMs (OpenAI, Anthropic, Hugging Face). Skilled in prompt engineering with schema enforcement, post-processing, and context-aware generation. Experience integrating GenAI workflows into business reporting, customer support, and automation pipelines. RAG (Retrieval-Augmented Generation) Pipelines: Designed and deployed modular RAG pipelines with vector databases (Pinecone, Weaviate, FAISS). Implemented document chunking, embeddings, and retrieval optimization for scalable knowledge systems. Built production-ready RAG apps with caching, rate limiting, and explainable outputs. Data Science & ML Engineering: Advanced proficiency in Python, Pandas, Scikit-learn, XGBoost, LightGBM for forecasting and analytics. Strong background in feature engineering (lag, lead, rolling windows, categorical encoding). Expertise in error analysis (MAPE, RMSE) and time-series forecasting pipelines with leakage prevention. Interview Preparation & Coaching: Specialized in Quantium-style case studies and business scenario interviews. Created MCQs, mock case studies, and practice sessions tailored to data science and AI roles. Guidance on structuring answers, storytelling with data, and business-aligned insights. App Development & Workflow Automation: Built Streamlit apps for flight deal aggregation, ML dashboards, and chatbot solutions. Integrated multiple APIs with robust caching and rate limiting for scalable performance. Designed modular, production-ready apps with clear separation of concerns.