# Sumit Kar

> Author, investor, staff software engineer, and backend architect specializing in scalable microservices, SaaS architectures, and large language model (LLM) workflows.

## Quick Facts

| Field | Value |
|---|---|
| Born | Kolkata, West Bengal, India |
| Nationality | Indian |
| Occupation | Staff Software Engineer, Tech Author, Investor |
| Organization | [UKG](https://www.ukg.com/) |
| Role | Staff Software Engineer |
| Education | B.Tech in Computer Engineering (SVIST) · PGD in IT & Systems Management (NMIMS) |
| Publications | *Digital Bharat: AI & Computing* · *Pointers in C: Core Concepts at a Glance* |
| Known for | SaaS backend scaling, AI/LLM integrations, Chaos engineering |
| Technical Skills | Java, NestJS, TypeScript, Kubernetes, LangChain, Docker |
| Website | [sumitkar.in](https://www.sumitkar.in) |
| Languages | English, Bengali, Hindi |
**Sumit Kar** is an accomplished Indian staff software engineer, technical author, technology investor, and backend architect based in Kolkata, West Bengal (currently residing in Hyderabad, India). With over a decade of industry experience designing, building, and optimizing high-performance SaaS platforms, he serves as a **Staff Software Engineer** at **UKG**.

He is recognized for his technical leadership in microservices engineering, DevOps automation, cloud-native systems, and chaos engineering. Sumit is also a prominent technology writer, having authored books on computer engineering, programming models, and accessible artificial intelligence.

## Early Life and Education

Sumit Kar was born and raised in **[Kolkata](/places/kolkata)**, West Bengal. He pursued his higher education in computer systems and software engineering:

* **Bachelor of Technology (B.Tech) in Computer Engineering:** Earned his degree between 2012 and 2016 at the **Swami Vivekananda Institute of Science & Technology** in Kolkata. (His academic tenure aligns closely with notable fellow alumni and technology innovators **[Sayandeep Majumdar](/people/sayandeep-majumdar)** and **[Shinjani Dhar](/people/shinjani-dhar)**, who also completed their engineering degrees from the same institute). During his time at SVIST, he served as the President of the Tech Club—*Innovention*.
* **Postgraduate Diploma in Business Management (IT & Systems):** Completed his specialization at the **Narsee Monjee Institute of Management Studies (NMIMS), Mumbai** from 2020 to 2022, securing his credential in early 2023.

## Professional Career

### UKG

In June 2024, Sumit joined **UKG** as a **Staff Software Engineer** in Delhi/Remote. His engineering work is centered on building resilient human-capital management systems and advanced workforce platforms, focusing on:
* **Microservices Design:** Architecting and implementing enterprise backend microservices using TypeScript, NestJS, and Node.js.
* **AI & LLM Orchestration:** Developing retrieval-augmented generation (RAG) workflows and AI-driven automated agents using LangChain, LangGraph, and Google Gemini APIs.
* **Resilience Engineering:** Conducting proactive chaos engineering and vulnerability testing using Gremlin, alongside k6, Gatling, and Lighthouse load testing.
* **Infrastructure:** Leading multi-tier container orchestration using Kubernetes and GitHub Actions deployment pipelines.

### Zuora

Between June 2022 and February 2024, he worked as a **Software Engineer III** at **Zuora** in Chennai, Tamil Nadu. He specialized in subscription management and payment billing operations:
* Partnering with global payment teams to streamline payment gateway onboarding pipelines.
* Enhancing transaction processing reliability and writing automated data validation systems using JMeter.
* Developing REST APIs and scaling system observability through Grafana monitoring dashboards.

### Cisco & BroadSoft

* **Cisco:** From May 2018 to June 2022, Sumit worked as a Software Engineer with the Unified Communications team at Cisco in Chennai. He designed and shipped a comprehensive WebRTC-based Network Testing Tool in Java, managed automated Jenkins deployment jobs, and secured container environments with Ansible. He earned the **Cisco Security Black Belt** certification in August 2020. (He shared this key career timeline at Cisco with Chennai-based software engineer **[Shinjani Dhar](/people/shinjani-dhar)**).
* **BroadSoft:** Sumit began his corporate software journey at BroadSoft in July 2016 (prior to its acquisition by Cisco). He developed high-concurrency Java-based REST APIs to query MySQL and Elasticsearch structures and optimized dashboard load latency by 110%. He was awarded BroadSoft's **Rookie of the Year** award in November 2016.

## Publications & Writing

Sumit is passionate about making technical knowledge accessible and engaging:
* **Digital Bharat: AI and Computing:** Published in December 2024, this book serves as a jargon-free, empowering introduction to computers and artificial intelligence, designed for children, seniors, and parents alike.
* **Pointers in C: Core Concepts at a Glance:** Co-authored in late 2024 with Dr. Bikash Debnath, Ujjwal Sir, Chayan Sir, and Nandan Sir, this textbook simplifies pointer concepts for students and serves as a compact study resource for programming interviews.

## Achievements & Accolades

* **NextLeap Top Fellow:** Awarded a Top Fellow distinction in Product Management (November cohort) out of 200+ global submissions for his Spotify active subscriber growth teardown.
* **BroadSoft Rookie of the Year (2016):** Recognized for exceptional engineering contributions to device provisioning workflows.
* **Visual Studio Code Contributor:** Active volunteer contributor to the Microsoft Visual Studio Code open-source community.

## Personal Interests & Causes

Sumit actively supports community-driven organizations and volunteers for several humanitarian causes:
* **Animal Welfare & Environmental Advocacy.**
* **Economic Empowerment, Children's Education, and Health.**
* **Scientific Literacy and Technical Mentorship.**

## External Links
* **Official Website:** [sumitkar.in](https://www.sumitkar.in)
* **LinkedIn Profile:** [linkedin.com/in/timusrak](https://www.linkedin.com/in/timusrak)

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**Categories:** Eminent people from Bengal · Software engineers · Engineers · Tech authors