Cloud Backend & DevOps Engineer

Kushal Kumar

Know About Me

Download Resume

Work Experience

Jan 2026 - Ongoing

Software Engineer

Ace Marbles and Granites • Full-time

Sep 2023 - May 2025

Software Engineer

Webdenso • Full-time

Built transaction systems using PostgreSQL and caching, cutting cart latency by 70%.
Developed centralized media management with S3, auto webp and custom foldering, boosting availability up to 63%.
Migrated MongoDB database to PostgreSQL with normalization and replication, tripling user limit (350 → 1000+).
Optimized data search using trie and cache heaps, shrinking API size from 15MB to 4KB.
Implemented NGINX load balancing with Docker Slim, cutting server load by 35% and saving 45% memory.

Related work project

Featured Projects

Business Automation

livecommissioned

Bunchup

...

GitHub Discord

E-commerce

liveby employer

Giftlaya

...

Website Insta

CODE UNDER NDA

See all Projects

Skills

Fundamentals

Data Structures
Algorithms
System Design
Networks
Databases
OS

Languages

Golang
Python
TypeScript
C language

Everyday Tools

Linux
Docker
Git
AWS

Development

Backend

Golang
NestJS
gRPC
Kafka
GraphQL
Express
Microservices

DevOps

CI/CD pipeline
Kubernetes
NGINX
Grafana
Jenkins
GitHub Actions

See all Skills

Part-time

May 2025 - Aug 2025

Marketing Automation Engineer

The MantraMugdh • Part-time

Created webhook integrations to improve campaign deployment speed and sync CRM data.
Integrated marketing platforms and email automation workflows.

Jun 2023 - Feb 2024

NodeJS & Python Instructor

BrightCHAMPS • Part-time

Conducted training sessions, focusing on clear understanding of asynchronous programming, server-side development and cache fundamentals for American students.
Assisted in building RESTful APIs, integrating MySQL and hosting the server on Heroku.

Education

2020 - 2023

BSc, Computer Science

St. Xavier's College (Autonomous), Kolkata

CGPA 8.51/10
Rank holder in final year with 9.4 SGPA (Web 99%, Algos 94%)
Winner of Data Science department inter-college DSA competition: Eureka

Achievements

LeetCode Knight, 2025

Self milestone

LeetCode Profile

Portfolio traffic in 50+ countries, 2024

Self milestone

Check out

See all Achievements

Reviews that speak

What work colleagues and clients say

Ravi Chakraborty

CEO, MantraMugdh

"Kushal's work in MantraMugdh has transformed our business into an online market with high user reach. His backend skills is truly impressive. Kushal has shown responsibility during his period of service."

Jamiel O' Kablfeau

Contractor, UI designer

"Kushal Kumar's UI designs are an eye-candy and appeals to many of my clients. He has consistently delivered since 2021 as my go-to UI designer."

Shreya Sarkar

Mentor, BrightChamps

"His consistent deliverance in making DSA fun to learn goes to show his expertise in the same."

Priyank Sutariya

Contractor, portfolio development

"He helped me migrate from Hostinger into Azure for a portfolio i hired him for. Overall I am happy with his works and recommend him as well."

Abhishek Biswas

Project Manager, Webdenso

"Kushal’s creativity in UI/UX design and development is unmatched. He has an incredible ability to balance functionality with aesthetics. He is also adept with backend and optimization as he handled a lot of heavy tasks like payments system and dynamic page management."

Hritesh Mehta

Project Manager, BrightChamps

"Kushal's effective communication enriched our team dynamics with students. He has high composure and patience demanded of an instructor."

Rudra Kumar Mishra

Full Stack Developer, MakeIndias

"We have worked together over a year and I volunteer to say Kushal has high adaptability to growing needs and newer technologies. He learnt and implemented an IaC over a night with precision. His optimization using DSA is seamless and I have learnt much from him. He is humble, thus easily approachable as well."

Naveen Kumar

Full Stack Developer, MakeIndias

"Kushal's analytical prowess and adept problem-solving capabilities were evident in his approach in creating the LMS system for my client. The speed is quick and satisfiable."

Aniruddh Yadav

Sales Manager, MantraMugdh

"Kushal built a leads tracking and logging feature that the team finds really useful and productive to work with. He is a great person to be around with as well."

Vishal Gupta

CEO, Webdenso

"During Kushal's tenure, his role encompassed backend, system architecturing, cloud management and performance optimization. His technical skills and problem solving abilities have been instrumental to us."

Ronit Khandelwal

Backend Developer, Dharmayana

"Kushal's handling of UI/UX designing is just phenomenal, keeping in mind the smallest of the user requirements. Alongside, his backend skills to make any task more user-friendly is an added plus."

Sagar Das

Senior Developer, Webdenso

"Kushal brings a perfect blend of technical expertise and design thinking. I have seen his works and can confidently vouch for his web skills."

Stacy Harper

Contractor, cloud and grpahics

"(Kushal) Kumar's been my primary developer when requiring discord bots or things setup online. His skills in graphics is also at a professional scale for having delivered consistent banners, logos and thumbnails as required."

Shubham Sharma

SEO Executive, MakeIndias

"The on-page SEO done by Kushal is commendable. His skills in cloud and api is beyond great as it helps with page ranking by miles."

Ravi Chakraborty

CEO, MantraMugdh

"Kushal's work in MantraMugdh has transformed our business into an online market with high user reach. His backend skills is truly impressive. Kushal has shown responsibility during his period of service."

Jamiel O' Kablfeau

Contractor, UI designer

"Kushal Kumar's UI designs are an eye-candy and appeals to many of my clients. He has consistently delivered since 2021 as my go-to UI designer."

Shreya Sarkar

Mentor, BrightChamps

"His consistent deliverance in making DSA fun to learn goes to show his expertise in the same."

Priyank Sutariya

Contractor, portfolio development

"He helped me migrate from Hostinger into Azure for a portfolio i hired him for. Overall I am happy with his works and recommend him as well."

Abhishek Biswas

Project Manager, Webdenso

"Kushal’s creativity in UI/UX design and development is unmatched. He has an incredible ability to balance functionality with aesthetics. He is also adept with backend and optimization as he handled a lot of heavy tasks like payments system and dynamic page management."

Hritesh Mehta

Project Manager, BrightChamps

"Kushal's effective communication enriched our team dynamics with students. He has high composure and patience demanded of an instructor."

Rudra Kumar Mishra

Full Stack Developer, MakeIndias

"We have worked together over a year and I volunteer to say Kushal has high adaptability to growing needs and newer technologies. He learnt and implemented an IaC over a night with precision. His optimization using DSA is seamless and I have learnt much from him. He is humble, thus easily approachable as well."

Naveen Kumar

Full Stack Developer, MakeIndias

"Kushal's analytical prowess and adept problem-solving capabilities were evident in his approach in creating the LMS system for my client. The speed is quick and satisfiable."

Aniruddh Yadav

Sales Manager, MantraMugdh

"Kushal built a leads tracking and logging feature that the team finds really useful and productive to work with. He is a great person to be around with as well."

Vishal Gupta

CEO, Webdenso

"During Kushal's tenure, his role encompassed backend, system architecturing, cloud management and performance optimization. His technical skills and problem solving abilities have been instrumental to us."

Ronit Khandelwal

Backend Developer, Dharmayana

"Kushal's handling of UI/UX designing is just phenomenal, keeping in mind the smallest of the user requirements. Alongside, his backend skills to make any task more user-friendly is an added plus."

Sagar Das

Senior Developer, Webdenso

"Kushal brings a perfect blend of technical expertise and design thinking. I have seen his works and can confidently vouch for his web skills."

Stacy Harper

Contractor, cloud and grpahics

"(Kushal) Kumar's been my primary developer when requiring discord bots or things setup online. His skills in graphics is also at a professional scale for having delivered consistent banners, logos and thumbnails as required."

Shubham Sharma

SEO Executive, MakeIndias

"The on-page SEO done by Kushal is commendable. His skills in cloud and api is beyond great as it helps with page ranking by miles."

Cloud Backend & DevOps Engineer

Work Experience

Software Engineer

Ace Marbles and Granites • Full-time

Software Engineer

Webdenso • Full-time

Featured Projects

Skills

Fundamentals

Data Structures

Algorithms

System Design

Networks

Databases

OS

Languages

Golang

Python

TypeScript

C language

Everyday Tools

Linux

Docker

Git

AWS

Development

Backend

Golang

NestJS

gRPC

Kafka

GraphQL

Express

Microservices

DevOps

CI/CD pipeline

Kubernetes

NGINX

Grafana

Jenkins

GitHub Actions

Part-time

Marketing Automation Engineer

The MantraMugdh • Part-time

NodeJS & Python Instructor

BrightCHAMPS • Part-time

Education

BSc, Computer Science

St. Xavier's College (Autonomous), Kolkata

Achievements

Reviews that speak

What work colleagues and clients say

Ravi Chakraborty

"Kushal's work in MantraMugdh has transformed our business into an online market with high user reach. His backend skills is truly impressive. Kushal has shown responsibility during his period of service."

Jamiel O' Kablfeau

"Kushal Kumar's UI designs are an eye-candy and appeals to many of my clients. He has consistently delivered since 2021 as my go-to UI designer."

Shreya Sarkar

"His consistent deliverance in making DSA fun to learn goes to show his expertise in the same."

Priyank Sutariya

"He helped me migrate from Hostinger into Azure for a portfolio i hired him for. Overall I am happy with his works and recommend him as well."

Abhishek Biswas

"Kushal’s creativity in UI/UX design and development is unmatched. He has an incredible ability to balance functionality with aesthetics. He is also adept with backend and optimization as he handled a lot of heavy tasks like payments system and dynamic page management."

Hritesh Mehta

"Kushal's effective communication enriched our team dynamics with students. He has high composure and patience demanded of an instructor."

Rudra Kumar Mishra

Naveen Kumar

"Kushal's analytical prowess and adept problem-solving capabilities were evident in his approach in creating the LMS system for my client. The speed is quick and satisfiable."

Aniruddh Yadav

"Kushal built a leads tracking and logging feature that the team finds really useful and productive to work with. He is a great person to be around with as well."

Vishal Gupta

"During Kushal's tenure, his role encompassed backend, system architecturing, cloud management and performance optimization. His technical skills and problem solving abilities have been instrumental to us."

Ronit Khandelwal

"Kushal's handling of UI/UX designing is just phenomenal, keeping in mind the smallest of the user requirements. Alongside, his backend skills to make any task more user-friendly is an added plus."

Sagar Das

"Kushal brings a perfect blend of technical expertise and design thinking. I have seen his works and can confidently vouch for his web skills."

Stacy Harper

"(Kushal) Kumar's been my primary developer when requiring discord bots or things setup online. His skills in graphics is also at a professional scale for having delivered consistent banners, logos and thumbnails as required."

Shubham Sharma

"The on-page SEO done by Kushal is commendable. His skills in cloud and api is beyond great as it helps with page ranking by miles."

Ravi Chakraborty