Open to opportunities

Josiah User

@josiahuser1

Message

AI Engineer shipping production RAG and agentic LLM systems, designing scalable multi-tenant backends.

India

Message

What I'm looking for

I’m looking to keep owning architecture and delivering production LLM systems—especially RAG and agentic workflows—where I can scope solutions end-to-end, optimize reliability/latency, and contribute mentorship as the product scales.

I’m an AI Engineer focused on shipping production RAG pipelines, agentic LLM systems, and GPU-accelerated inference. At Credentech Solutions, I own architectural decisions for AI/backend systems—evaluating retrieval, inference, and multi-tenant trade-offs—while leading client-facing technical scoping and translating business requirements into design specs.

In delivery, I’ve engineered end-to-end systems like a GPU-accelerated OCR pipeline for APB Bank achieving ~95% field-extraction accuracy on 500+ documents/day, with fault-tolerant multi-node inference sustaining ~99% uptime. I’ve also built a multi-tenant RAG customer support chatbot that lifts document-grounded answer accuracy to ~90% and keeps average response latency under ~3 seconds, plus a data-science-informed chatbot prototype using the OpenAI API and Streamlit.

Experience

Work history, roles, and key accomplishments

Current

Associate Software Engineer

Current

Credentech Solutions

Apr 2026 - Present (3 months)

Own architectural decisions for AI/backend systems, covering retrieval, inference, and multi-tenant trade-offs across production services. Lead client-facing technical scoping for AI deployments and mentor engineers on RAG pipeline design and FastAPI backend standards.

RAG Agentic AI LangGraph Vector Search Prompt Engineering fastAPI OpenAI API LLaMA AWS EC2 S3 System Design Scoping Mentorship

Junior Software Engineer

Credentech Solutions

Feb 2025 - Apr 2026 (1 year 2 months)

Built production AI features including a GPU-accelerated OCR pipeline and a multi-tenant RAG-based customer support chatbot. Implemented fault-tolerant inference, tenant isolation, secure access controls, and supporting tracking and ingestion services.

GPU Accelerated OCR NVIDIA L4 fastAPI Microservices Nginx Failover Routing OAUTH2 JWT PostgreSQL RAG Qdrant REST APIs MongoDB Async Ingestion

Data Science Intern

Quelit

Jul 2024 - Dec 2024 (5 months)

Developed a personalized chatbot using the OpenAI API with Streamlit and MongoDB-backed multi-turn conversation storage. Built logging pipelines to capture user interactions for persona and behavioral analysis.

OpenAI API Streamlit MongoDB Prompt Engineering NLP

Co-Founding Engineer

AI-Powered CBSE Learning Platform

Co-built an end-to-end CBSE learning MVP including RAG-based subject tutors and an OCR + evaluation engine for teacher answer-sheet grading. Delivered the full stack (FastAPI backend, React/Next.js frontend, Supabase) and deployed it for iteration based on demo-user feedback.

RAG Curriculum Grounded Retrieval fastAPI React Next.js Supabase Deploying Hybrid Scoring Architecture