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Rohit Kumar

Building resilient backend systems engineered to scale with confidence. Over 4+ years, I've designed APIs, data layers, and third-party integrations that keep products fast, reliable, and ready to scale. I focus on clean architecture, production stability, and thoughtful delivery that turns complex backend challenges into dependable business value.

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Backend Node.js Engineer

Rohit Kumar

4+ years designing APIs, data layers, and integrations that hold up in production.

Role

Backend Node.js Engineer

Experience

4+ years

Location

Ludhiana Punjab India

Status

Open to Work

Focus Stack

Node.jsExpress.jsMongoDBAWS

Delivery Mode

Reliable backend systems with a product-minded eye for scale.

Professional Profile

Results-driven Backend Engineer with over 4+ years of experience designing and implementing scalable web architectures. Proficient in Node.js, Express.js, MongoDB, and MySQL (Sequelize ORM), with a strong focus on building high-performance, production-grade applications. Skilled in integrating complex third-party services, including Stripe for payment processing, OpenAI APIs, D-ID Visual AI Agents, and Google APIs. Experienced in leveraging AWS cloud services and streamlining deployments through CI/CD pipelines via Jenkins. Committed to enhancing product reliability through robust API design, query optimization, and thorough testing methodologies — driving operational efficiency and measurable business growth.

Years Experience

4+

Shipped Projects

7+

Languages Spoken

EnglishHindiPunjabi

Technical Skills

The tools and services I reach for to design, build, and ship backend systems end to end.

Backend Development

Node.jsExpress.jsJavaScriptBackend ArchitectureREST API Design and Development

Database & Storage

MongoDBMySQL (Sequelize ORM)PostgreSQL (Prisma ORM)FirebaseDatabase Design

Performance & Caching

RedisAPI Response OptimizationDatabase Query OptimizationPerformance Troubleshooting

Third-Party API Integrations

Stripe PaymentsShopify APIsOpenAI APIsD-ID Visual AI APIsGoogle APIsBranch.io

Cloud & DevOps

AWS (EC2 and S3)Jenkins CI/CDGitGitHubBitbucket

Testing & Code Quality

REST API TestingAPI DebuggingUI TestingCode Reviews

AI-Assisted Development

Google AntigravityClaude CodeCodex

Frontend & Additional

HTMLCSSAngularjQueryBootstrap

Professional Experience

A concise timeline of the systems I owned, the products I shipped, and the impact I helped deliver.

Mar 2026 — Present

Backend Development & Upskilling

Independent Projects

Remote

Backend Development

Continued hands-on backend development using Node.js, Express.js, MongoDB, Redis, and REST APIs through technical and personal projects.

Continuous Upskilling

Strengthened backend engineering skills through Scaler Masterclasses and technical sessions focused on modern development practices, database design, and backend technologies.

AI-Assisted Workflows

Adopted AI-assisted development practices using Google Antigravity, Claude Code, and Codex for code exploration, debugging, problem-solving, and development productivity.

Jul 2025 — Mar 2026

Backend Performance Engineer

WebGarh Solutions

Sahibzada Ajit Singh Nagar, Punjab, India

REST API & Performance Optimization

Developed and maintained Node.js/Express.js REST APIs, optimized MongoDB queries and backend workflows, identified API and database bottlenecks, and implemented Redis caching to improve application performance.

Third-Party Integrations

Integrated OpenAI, D-ID Visual AI, and Shopify APIs into backend services, supporting AI-powered features, API testing, debugging, and third-party application workflows.

Code Quality & Collaboration

Participated in code reviews, issue resolution, and collaboration with frontend teams while following clean, maintainable, and scalable backend development practices.

Sep 2021 — Feb 2025

Senior Node.js Developer

Tekki Web Solutions

Ludhiana, Punjab, India

Full-Cycle Backend Development

Built and maintained Node.js/Express.js REST APIs for e-commerce, recruitment, consumer engagement, and AI-powered applications, with MongoDB, MySQL (Sequelize), and PostgreSQL (Prisma) backends.

Integrations & Performance

Integrated Stripe, Google APIs, and Branch.io; optimized database queries, API workflows, and Redis caching while supporting AWS EC2, S3, and Jenkins CI/CD deployments.

Team Collaboration & Recognition

Collaborated with frontend teams, conducted code reviews, guided junior developers on backend practices, and received the Individual Performer of the Team Award for contributions to project delivery and code quality.

Selected Projects

Selected builds that blend scalable backend thinking with polished product execution.

Sellor AI: Sales Avatar

AI Sales Assistant

An AI-powered virtual sales assistant for Shopify stores that automates recommendations and customer queries.

  • Built the AI virtual assistant layer that automates product recommendations and handles customer queries.
  • Built scalable APIs to integrate with Shopify, ensuring smooth data flow and higher conversions.
JavaScriptNode.jsExpress.jsREST APIsShopify APIOpenAI APID-ID APIFirebase

Hiwil — "Here Is What I Like"

Personalization Platform

A personalization platform where users share preferences and engage with brands for tailored experiences.

  • Enabled users to personalize interactions by sharing preferences and controlling settings.
  • Built the engagement and rewards ecosystem powering brand feedback loops and VIP perks.
JavaScriptNode.jsExpress.jsREST APIsGoogle APIsBranch.ioMongoDBRedisAWS (EC2 and S3)Jenkins (CI/CD)

My Turn

Recruitment Platform

A recruitment platform that simplifies hiring by focusing exclusively on job-role-based matching.

  • Streamlined the recruiter-facing workflow for posting and managing job-role-specific hiring.
  • Built a specialized, targeted environment catering to the recruitment industry's specific needs.
JavaScriptNode.jsExpress.jsREST APIsAWS (EC2 and S3)Jenkins (CI/CD)MySQL (Sequelize ORM)Stripe Payments

Roaring Tiger

E-commerce Platform

An e-commerce web application built for a robust, user-friendly online buying and selling experience.

  • Built the backend platform powering online buying and selling for a broad range of consumer needs.
  • Prioritized a seamless, user-centric interface to optimize customer satisfaction.
JavaScriptNode.jsExpress.jsREST APIsPostgreSQL PrismaAWS (EC2 and S3)

Project Estimator

Automated Estimation Tool

An internal tool that automates project effort and cost estimation across different industries and scopes.

  • Automated the estimation workflow to reduce human error and turnaround time on project quotes.
  • Designed a versatile estimation model adaptable to different industries and project types.
JavaScriptNode.jsExpress.jsMongoDBAWS (EC2 and S3)

Education

2017 – 2021

Bachelor of Technology (B.Tech) – Computer Science & Engineering

Gulzar Group of Institutes, Khanna, Punjab

CGPA: 7.94/10

Certifications & Achievements

Web Designing — HTML, CSS, JavaScript, jQuery, Bootstrap

Aptech / World With Web

MEAN Stack Developer — Angular, Node.js, Express.js, MongoDB

Aptech / World With Web

Node.js Developer

Udemy

Individual Performer of the Team

Tekki Web Solutions Pvt. Ltd.

Let's Build Something Great Together

Open to backend and Node.js opportunities. For roles, collaborations, or product ideas, connect with me by email, phone, or LinkedIn.

Open to Opportunities

Ready to build dependable backend systems that make an impact.

If you have a role, project, or idea in mind, send a message and I will usually get back to you within a day.