OnHand-AI-Engineer

I build data processing scripts with pandas and numpy. Clean Python script that reads your input data (CSV, JSON, Excel, or SQL), cleans and transforms it (handle missing values, normalize, merge datasets, pivot), performs analysis or aggregation, and outputs processed results in your desired format. Includes logging, error handling, and a summary report.

I design normalized PostgreSQL or MySQL database schemas optimized for your use case. Entity-relationship design, migration files (Laravel, Alembic, or raw SQL), proper indexes for query performance, foreign key constraints, and seed data scripts. I handle one-to-many, many-to-many, polymorphic relationships, and soft deletes.

I build Laravel REST controllers, Eloquent models, database migrations, form requests, and middleware. Complete API resource with proper validation, relationships, pagination, filtering, and error responses following Laravel conventions. Includes route registration, API resource transformers, and PHPUnit tests.

I build complete Retrieval-Augmented Generation pipelines. Document ingestion with chunking strategies, embedding generation with OpenAI or open-source models, vector storage with Pinecone or ChromaDB, a query endpoint that retrieves relevant context and generates grounded answers with source citations. Configurable chunk size, overlap, top-k, and reranking.

I integrate OpenAI, Anthropic, or open-source LLMs into your application. You get working API integration code, optimized prompts with structured output parsing (JSON mode, function calling), error handling with retries and fallbacks, and token cost estimation. I handle streaming responses, conversation memory, and multi-model setups.

I build production-ready REST API endpoints with FastAPI or Django. You get a complete endpoint with route definition, request/response validation (Pydantic or DRF serializers), database model with SQLAlchemy or Django ORM, proper error handling, and unit tests. Clean, documented code ready to deploy.