Sandeep Kumar Gali

I’m a Software Engineer with hands-on experience building backend applications, API-driven systems, data processing workflows, and AI/ML solutions. I focus on turning business and technical requirements into scalable, production-oriented systems.

At Zensar, I built Python-based data processing and backend utility modules using Pandas, NumPy, and SQLAlchemy to transform, validate, and load data from PostgreSQL and MySQL. I wrote complex SQL queries and validation checks to improve reporting accuracy, reducing manual reconciliation by 10%.

I also developed reusable Python scripts for schema validation, null handling, duplicate detection, data cleansing, and exception logging—improving downstream accuracy and reducing recurring input errors by 25%. By integrating backend workflows through REST API calls and response validation, I improved execution reliability and reduced API-related failures by 15%.

I’m especially interested in retrieval-based AI systems and semantic search. I built an end-to-end RAG multi-document question answering system (LangChain, FAISS, Sentence Transformers, FastAPI, OpenAI API) and developed an intelligent document search API (Elasticsearch + FastAPI) with semantic and keyword-based retrieval, ranking logic, and ingestion pipelines.