Vivek Kumar

5.0

(47 reviews)

US$20.00

For every 15 mins

134

Sessions/Jobs

ABOUT ME

Staff Engineer mentoring production AI with LLMs, RAG, and Python

Staff Software Engineer with hands-on experience building production systems using Python, LLMs, RAG, AI agents, agentic workflows, and evaluation frameworks, along with Java, React, and Next.js. I help developers design scalable, real-world AI and backend systems, review architecture, debug complex issues, and grow toward senior and staff-level roles with practical, actionable guidance.

English

New Delhi (+05:30)

Joined January 2021

EXPERTISE

Python

11 years experience

LLM

2 years experience

Agent-Based Modeling

RAG

2 years experience

Agentic frameworksRag solutionsRag Based architectures

Java

11 years experience | 1 endorsement

Spring Boot

REVIEWS FROM CLIENTS

5.0

(47 reviews)

Shae Murphy

December 2023

Vivek again did an excellent job.

Shae Murphy

December 2023

Vivek did an excellent job addressing my Ruby, Postgres and Ruby on Rails dependency and configuration problems. He was knowledgable and available. I will not hesitate to engage him again.

Sean Wong

January 2022

Appreciate it Vivek. :) Thanks for the React help

Bal Jassal

November 2021

really enjoyed working with Vivek!

Bilal Masters

August 2021

Clear, concise, and was able to help me solve the issue I was having.

Mathew Cook

August 2021

We worked very well together and went through a lot of content in a timely fashion

Neena

July 2021

Vivek was super helpful and informative! He is very skilled and knowledgeable.

Jacob Trebil

June 2021

Vivek is great

Roberto Castillo

June 2021

He is great solving problems

Jacob Trebil

June 2021

Vivek is amazing.

SOCIAL PRESENCE

GitHub

Plain-Text-to-HTML-Generator

Converting plain text to html, support for code snippets.

Python

programming-notes

HTML

Stack Overflow

170 Reputation

EMPLOYMENTS

Staff Software Engineer

Walmart

2020-01-01-Present

- Lead a project to build Incident Management which has saved Walmart around $10k in licensing cost and have reduced the AHT for custo...

- Lead a project to build Incident Management which has saved Walmart around $10k in licensing cost and have reduced the AHT for customer support calls.

- Migrated our team apps to Walmart cloud native platform (Kubernetes)

- Created various wrappers around different data points to easily query data which saved around 60-90 mins per day in searching for data while testing.

Python

Java

React

Python

Java

React

Spring Boot

LLM

RAG

Agentic frameworks

Full Stack Engineer 2

Bizongo

2018-07-01-2019-10-01

- Built and scaled Artwork Flow from scratch from the Backend side single handedly

- Kept the test coverage to 100% for all the ...

- Built and scaled Artwork Flow from scratch from the Backend side single handedly

- Kept the test coverage to 100% for all the projects I lead.

- Lead a team of 3 people for various internal projects.

Ruby

Java

Ruby on Rails

Ruby

Java

Ruby on Rails

PostgreSQL

React

Spring Boot

Software Engineer

BangTheTable

2017-08-01-2018-08-01

- Built their new Email infra with drip email support

- Helped them in migration of the existing product to latest RubyOnRails v...

- Built their new Email infra with drip email support

- Helped them in migration of the existing product to latest RubyOnRails version

- Was on par with the estimates given for all the tasks.

Ruby

Java

Ruby on Rails

Ruby

Java

Ruby on Rails

PostgreSQL

Spring Boot

PROJECTS

Guess Who Game

2018

Guess who is a multiplayer online game built using web-socket. It is game between 2 players, and multiple games can be spawned. Each play...

Guess who is a multiplayer online game built using web-socket. It is game between 2 players, and multiple games can be spawned. Each player has 8 images and selects one of them, the other player has to guess which of the images has been selected by the first player. Whoever gets to score of 8 wins the game.

Node.js

WebSocket

Socket.IO

Node.js

WebSocket

Socket.IO

React

Express.js