Looking for a job

Balaji Hari

@balajihari

AI & Backend Developer at ADP who contributed to the EI9 compliance platform and prototyped RAG-based AI agents with LangGraph.

India

Message

At Automatic Data Processing (ADP), I developed and maintained Java backend microservices for EI9, a compliance platform covering the employee I-9 lifecycle. I also resolved production defects in core workflow modules.

I built Angular modules integrating conversational assistance into onboarding and re-verification workflows. I also prototyped RAG-based AI agents and workflow state graphs with LangChain and LangGraph, and used LangSmith to evaluate and trace LLM interactions.

At ADP, I built Python data aggregation services that powered BI dashboards for internal stakeholders. Earlier, as a Freelancer, I engineered a React and Redux e-commerce SPA and integrated REST services with frontend applications.

Experience

Work history, roles, and key accomplishments

AI & Backend Developer

Automatic Data Processing (ADP)

Aug 2022 - Feb 2026 (3 years 6 months)

Developed and maintained core Java backend micro-services for ADP's EI9 system, a compliance-critical platform managing the full employee I-9 lifecycle. Built dynamic Angular UI modules for conversational assistance and designed RAG-based AI agents using LangChain and LangGraph.

Java Spring Boot Angular Lang Chain LangGraph Langsmith Python SQL REST APIs Microservices Data Engineering BI Reporting ETL

Frontend Developer

Freelancer

Aug 2017 - Feb 2019 (1 year 6 months)

Engineered a React SPA with Redux state management for a high-traffic e-commerce platform, improving page load performance and user engagement. Integrated RESTful web services via JPA and HTTP client libraries, and streamlined the development pipeline using Node.js tooling.