Rizon Kumar Rahi

Rizon Kumar Rahi

Full Stack Developer at P-41

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Rizon Kumar Rahirizon__kumar

Remote (India) · 4+ years

BengaluruCuttack, Odisha

Full Stack Developer · React · Next.js · Node.js · NestJS · rizon.kumar.rahi@gmail.com

I build scalable, high-performance web applications across the full stack, with a focus on clean architecture and measurable impact.

Full Stack Developer with 4+ years of experience shipping production-grade applications using React, Next.js, Node.js, and NestJS, consistently improving performance, reliability, and user engagement across enterprise products.

@RizonKumarrizonkumarrahirizonkumar@rizon__kumarrizon.kumar.rahi@gmail.com
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Experience

  • P-41 logo
    P-41Working

    Full Stack Developer

    Sep 2025 – Present · Remote

  • Dentsu logo
    DentsuPast

    Software Developer

    Jul 2022 – Aug 2025 · Bangalore, India

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Currently Building

Side projects in progress

Flight Booking App

In progress

Full-stack flight booking application with Next.js frontend and microservices backend (Flight & Booking services) built with Express.js and PostgreSQL.

Next.jsNode.jsPostgreSQLExpress.jsTypeScript+1

Code Hawk — AI Code Review

In progress

AI-powered automated code review SaaS platform using Next.js 16, React 19, TypeScript, and PostgreSQL, integrating Google Gemini AI.

Next.jsReactTypeScriptPostgreSQLPrisma+1

HabitFlow — Productivity Platform

In progress

Full-stack productivity & wellness platform with smart todo management, Kanban board, team collaboration, and health tracking.

Next.jsReactTypeScriptTailwind CSSNode.js+2
View all projects →What I'm up to →

Specialization

What I specialize in

I work best on product teams that need strong frontend judgment, dependable end-to-end delivery, and a quality-first approach to shipping.

Frontend Engineering

Build fast, responsive interfaces with React, Next.js, and TypeScript, focusing on performance and user experience.

Backend Development

Design and implement scalable APIs and services with Node.js, NestJS, and Express, backed by PostgreSQL and MongoDB.

Full-Stack Delivery

Own features end-to-end from database design to UI, delivering complete solutions with measurable business impact.

Performance Optimization

Reduce load times, optimize queries, and implement caching strategies that deliver tangible speed improvements.

Tech Stack

Technologies I work with

Frontend

  • React
  • Next.js
  • JavaScript
  • TypeScript
  • Tailwind CSS

Backend

  • Node.js
  • NestJS
  • Express
  • Prisma
  • REST APIs

Database

  • MongoDB
  • PostgreSQL
  • TypeORM
  • MySQL
  • Prisma

Tools

  • JIRA
  • Figma
  • WebStorm
  • VS CodeVS Code
  • CursorCursor
  • Postman
  • Codex

DevOps & Workflow

  • Git
  • CI/CD
  • Claude Code
  • Docker
  • Vercel

Architecture

  • System Design
  • HLD
  • LLD

Selected Wins

Proof of impact

These are the kinds of outcomes I aim for: better performance, stronger delivery confidence, healthier engineering practices, and clearer product results.

Faster page loads

Reduced page load times by 45% using Next.js SSR and optimized rendering strategies at P-41.

Improved query performance

Optimized database queries with TypeORM and indexing strategies, achieving 60% faster query execution.

Concurrent users supported

Built scalable applications handling 10,000+ concurrent users with reliable uptime and performance.

Projects delivered

Led a team of 5 developers and delivered 15+ projects on time with high quality and production readiness.

Increased user engagement

Drove a 30% increase in user engagement on the UnderArmour project through frontend optimizations at Dentsu.

Case Studies

Company-safe examples of how I work

I have not centered this site around personal projects because my strongest work has come from shipping real products in real teams. These case studies focus on ownership, constraints, and outcomes without exposing confidential details.

Particle41

Synemi — Community management platform

2025 – Present

Context
Built a full-stack community management platform (Synemi) for Particle41, serving as the sole full-stack developer owning both the Next.js web client and NestJS API.
Problem
The client needed a production-grade platform with complex domain logic — document management, architecture requests with voting workflows, granular role-based permissions, and multi-association support — all with enterprise-level security.
What I owned
Owned both codebases end-to-end: the web client with 50+ reusable components, server routes, and centralized state management, plus the API with layered architecture, auth guards, database repositories, API documentation, and end-to-end test coverage.
What changed
Delivered a production platform with granular permission system (VIEW/EDIT/ADMIN per resource), document manager with tree/search/bulk-move, architecture request workflows with voting and expiry, and comprehensive e2e test coverage across both codebases.
  • Next.js
  • NestJS 11
  • TypeORM
  • PostgreSQL
  • TypeScript
  • Redux
  • Vitest
  • Playwright
  • Supertest

Particle41 (Synemi)

Document manager with granular permissions

2025 – Present

Context
Synemi needed a full document management system with folder/file hierarchies, search, and fine-grained access control tied to association roles.
Problem
Users needed to upload, organize, search, and share documents with different permission levels per role — while handling edge cases like naming conflicts, bulk operations, and nested path resolution.
What I owned
Built the document management UI with tree navigation, drag-and-drop, bulk move, search/sort/filter, and conflict resolution. Built the document API with authentication and role-based permission checks, paginated queries, and per-row access control.
What changed
Shipped a production document manager with folder/file operations, bulk actions, automatic conflict handling, and granular view/edit/admin permissions per role. Comprehensive end-to-end test coverage across all document operations.
  • Next.js
  • NestJS 11
  • TypeORM
  • PostgreSQL
  • TypeScript
  • S3

Particle41 (Synemi)

Authentication, permissions & invitation system

2025 – Present

Context
Synemi required a robust authentication pipeline, role-based permission system, and invitation flow supporting multiple user types across associations.
Problem
The platform needed secure JWT + refresh token flows, switch-persona capability, invitation-based onboarding with auto-accept, and a flexible permission model that could be configured per role per association.
What I owned
Built the authentication API with credential validation, refresh token handling, registration pipelines, and structured error responses. Implemented the permissions layer on the web client with centralized permission state, route-level access gating, and a role editor UI. Built the invitation API with validate, accept, and register flows.
What changed
Delivered production auth with httpOnly refresh cookies, switch-persona, invitation auto-accept, and a permission system with VIEW/EDIT/ADMIN enforced consistently across all API controllers and web routes.
  • Next.js
  • NestJS 11
  • TypeORM
  • PostgreSQL
  • TypeScript
  • JWT
  • Redux
View all impact highlights

Leadership

How I support teams

My contribution is not just shipping code. I help teams move faster by improving quality, clarifying direction, and supporting the people around me.

  • Led a team of 5 developers at P-41, delivering 15+ projects with consistent quality and on-time execution.
  • Reduced page load times by 45% through Next.js SSR optimization and strategic caching implementations.
  • Improved query performance by 60% with TypeORM optimizations, directly impacting user experience at scale.
  • Built systems handling 10,000+ concurrent users with reliable uptime and strong performance under load.

    • Recognition

    Certifications and awards

    Signals of consistency matter too. These recognitions support the delivery and ownership story shown across the rest of the portfolio.

    45% Page Load Reduction

    P-41

    2025

    Achieved 45% faster page loads through Next.js SSR optimization and caching strategies.

    60% Query Performance Improvement

    P-41

    2025

    Optimized database queries with TypeORM, delivering 60% faster query execution across the platform.

    30% User Engagement Increase

    Dentsu (UnderArmour)

    2024

    Drove 30% increase in user engagement through frontend optimizations on the UnderArmour project.

    Razorpay Payment Integration

    Dentsu

    2023

    Successfully integrated Razorpay payment gateway, resulting in 20% increase in transactions.

    Testimonials

    What colleagues say

    Feedback from people I've worked with across teams and companies.

    Rizon's technical expertise and collaborative approach made a significant impact on our projects. His ability to solve complex problems while maintaining code quality is remarkable.

    Aparna Sharma

    Technical Lead · PayPal

    Rizon has been instrumental in our projects, particularly for Ralph Lauren. His full-stack skills and attention to detail consistently delivered results beyond expectations.

    Vishal Ugale

    Software Developer · Dentsu

    Working with Rizon on the Under Armour project was a pleasure. His frontend expertise and commitment to performance optimization drove measurable improvements in user engagement.

    Ankit Dudhat

    Software Developer · NTT Data

    Rizon's high problem-solving skills are evident in his work. He approaches every challenge methodically and delivers clean, maintainable solutions consistently.

    Ila Raj

    SDE-2 · Oracle

    Rizon's work on the Weather Tech site showcased his versatility. He seamlessly handled both frontend and backend challenges with equal proficiency.

    Prashant Singh Rajput

    SFMC Developer · Dentsu

    Rizon's React skills are top-notch. His component architecture decisions and state management patterns set a strong foundation for the entire team.

    Rishon Kumar

    SAP Hybrid Developer · Nagroo

    Rizon's proficiency in Express and his full-stack capabilities are impressive. He builds robust APIs and integrates them seamlessly with modern frontend frameworks.

    Saktiya

    Senior Software Developer · Valuelabs

    Rizon's dedication and attention to detail are truly exceptional. His work ethic and technical skills make him a standout engineer in any team.

    Tushar Bansal

    Student · University of Adelaide

    Education

    Academic background

    SRM Institute of Science and Technology logo

    B.Tech in Computer Science Engineering

    SRM Institute of Science and Technology

    2018 — 2022 · CGPA: 8.9

    ♥

    Beyond Code

    Interests & profiles

    PaintingPhotographyEsport GamingCricketMusicFitnessReading
    rizonkumar→rizonkumar→

    Contact

    Let's talk about impactful product engineering

    Open to full-stack and senior developer roles with ownership, impact, and opportunities to build at scale.

    rizon.kumar.rahi@gmail.comLinkedInView impact highlights

    You have a right to perform your prescribed duty, but you are not entitled to the fruits of your actions.

    — Bhagavad Gita, 2.47