Looking for a job

Sai Kumar

@saikumar1

GenAI Engineer @ Kroger | Built voycee.com (AI Voice SaaS, 20+ langs) | LangChain · GPT-4o · RAG · FastAPI · Spring Boot · AWS

United States

Message

What I'm looking for

Generative AI / ML Engineer role where I ship LLM features in production — RAG pipelines, Voice AI, LangChain agents, FastAPI, Spring Boot. At Kroger (Fortune 25) running GenAI at scale. Solo-built voycee.com (live AI Voice SaaS). Open to AI startups and enterprise teams building real AI products.

Generative AI Engineer at Kroger (Fortune 25), building LangChain + GPT-4o pipelines that plug into live retail operations across 5+ backend services — cutting manual processing by 32% and query latency by 40%. Also run Databricks workflow orchestration at scale across millions of daily transactions.

Solo-built voycee.com — a live AI Voice Receptionist SaaS handling real inbound calls for restaurants, clinics, and salons in 20+ languages. Reduced missed calls 80% during testing. Live product with real users and pricing tiers ($29-$199/mo). Stack: Python, FastAPI, Twilio, React 18, multiple LLM integrations.

Previously: TeamCal AI (Generative AI Engineer — built first LLM integration, LangChain pipelines into live calendar data, full-stack React 18 + Spring Boot + GraphQL, Redis caching cut API latency 37%) and DriveWealth (fintech, Spring Boot + Kafka microservices, 58% throughput gains).

M.S. CS, Pace University (2024). AWS Certified Developer Associate (valid through Aug 2027). 4 years of experience shipping AI/backend in production — not just prototypes.

Experience

Work history, roles, and key accomplishments

Generative AI Engineer

TeamCal AI

Apr 2023 - Apr 2025 (2 years)

Led first LLM integration at an AI scheduling startup — OpenAI GPT-4/3.5 into Spring Boot for scheduling intelligence. Built LangChain pipelines into live calendar data, cutting scheduling conflicts 43%. Full-stack: React 18 + TypeScript + Spring Boot + GraphQL. Redis caching cut API latency 37%, DB schema rewrites cut query time 42%. Built CI/CD from scratch: Jenkins + Docker + K8s.

PHP Python Node CodeIgniter Agile CI CD Microservices Cypress MySQL TypeScript

Java Programmer

Ionixx Technologies Private Limited

Jan 2021 - Sep 2022 (1 year 8 months)

Redesigned RESTful APIs for a trading platform, improving performance by 35%. Engineered real-time data communications and managed applications using Docker on AWS, ensuring high availability and fault tolerance.

Java Spring Boot AWS gRPC GraphQL Kafka Docker

Software Developer

FXMKT Technologies

Dec 2020 - Jun 2021 (6 months)

Engineered backend functionality for a custom clothing e-commerce website, implementing microservices architecture. Enhanced user experience through optimized web application features and automated testing processes.

Java Spring Boot Microservices TypeScript Object Oriented Programming PHP ES6 Express

Full Stack Developer

Personal Project

Dec 2023 - Jan 2024 (1 month)

Developed a web application for fake news detection using machine learning techniques, achieving 70% accuracy. Integrated backend functionality with Python and Flask, enhancing user experience and scalability.

Python Flask Machine Learning AWS Firebase JavaScript Deep Learning Algorithms

Mobile App Developer

Personal Project

Sep 2023 - Oct 2023 (1 month)

Developed a Recipe Dictionary app using React Native, enhancing user engagement by 50%. Implemented backend logic with Firebase for real-time updates, optimizing performance and user experience.

JavaScript React Native Firebase Mobile Development Performance Optimization API Integration

Current

Founder & AI Engineer

Current

Voycee

Nov 2025 - Present (5 months)

Building LangChain 0.3 + GPT-4o GenAI pipelines connected to 5+ backend services at Fortune 25 scale, cutting manual processing 32% and query latency 40%. Orchestrating Databricks workflows across millions of daily transactions, achieving 38% faster pipeline execution. Leading Voice AI project for customer call automation using Python + FastAPI. Agile delivery with data science team.

Langchain Agents GPT 4o Databricks fastAPI Python Spring Boot