Rohan Chatterjee

Product thinkingSystems disciplineVisual taste

EngineeringScalableSystems.

A portfolio with a point of view

Currently open to software engineering roles, product-focused internships, and ambitious builds across web, backend, and Android.

I engineer software systems that are reliable in production, intentional in UX, and scalable under real usage. My focus sits at the intersection of product thinking and systems discipline.

Across frontend, backend, and Android domains, I work with Next.js, Express.js, React, Kotlin, Jetpack Compose, Android SDK tools, MySQL, and PostgreSQL to build fast, maintainable platforms with clear technical architecture.

01 / About

Software that stays useful when the real world gets involved.

I build across web, backend, and Android. What connects the work is a concern for how software behaves beyond the demo.

About Me

Software Developer with hands-on experience in Android, Flutter, backend systems, and modern web technologies. Skilled in Kotlin, TypeScript, React Native, Node.js, FastAPI, Express.js, and RESTful API development, with experience building scalable mobile applications and system-oriented projects.

Contributed to technical leadership, event management, and cross-functional collaboration through multiple roles at K1000 and student technical organizations. Passionate about software architecture, scalable systems, UI/UX engineering, and real-world product development.

PhilosophyBuild it. Break it. Understand it. Then build it better.

Machined metallic systems core — THE SYSTEMS COREClear interfaces. Reliable foundations.A visual metaphor for how I build—not a technical simulation.

Core: Application logic that holds together.
Structure: Architecture with explicit constraints.
Connections: Clear interfaces between systems.

Principles behind the work

I build across the stack, from user-facing applications to backend systems and developer workflows.

I care about how software behaves in real-world environments, not just in ideal demos.

I am actively deepening my understanding of system design, distributed systems, and software architecture.

I am interested in building systems that handle scale, failure, and reliability with clarity.

I enjoy working on different kinds of projects, not just to ship them, but to understand how they should be designed, tested, and maintained in production.

What I'm Focused On

Backend systems and architecture

End-to-end product development

Scalable system design

Exploring technologies across mobile, web, and backend

02 / Journey

Experience

A structured record of the roles, systems, and teams that shaped how I build, ship, and scale product work.

Apr 2026 — PresentLatest chapter

01

Red Kite Productions

ReactJS Architect Intern (Part-Time)

Apr 2026 — Present · Part-time · Remote

Building a Next.js-based frontend platform using React.js, TypeScript, and Node.js for dynamic content rendering and modular UI management.

Developed reusable frontend components and centralized state handling to improve maintainability across multiple pages.

Worked on responsive UI optimization, frontend performance improvements, and rapid prototyping workflows.

Next.jsTypeScriptNode.jsPerformance Optimization

Jan 2026 — PresentGeeks for Geeks KIIT

02

Geeks for Geeks KIIT

Android Developer (Student Organization)

Jan 2026 — Present · Remote · Bhubaneswar, Odisha

Developing Android applications using Kotlin with modular activity structures and maintainable application logic.

Integrated REST APIs, asynchronous data loading, and backend-driven UI rendering for production-like workflows.

Worked on debugging, performance optimization, and responsive mobile interaction handling.

KotlinModular ArchitectureREST APIsDebugging

Aug 2025 — PresentDonum Technologies

03

Donum Technologies

Junior Software Developer & Marketing Intern

Aug 2025 — Present · Hybrid · Mumbai, Maharashtra

Assisted in frontend improvements and digital product presentation for additive-manufacturing campaigns.

Worked on branding assets, UI-focused promotional systems, and technical communication strategies.

Collaborated on marketing workflows integrating design coordination with product visibility initiatives.

React.jsUI/UXBranding AssetsTechnical Communication

May 2025 — PresentK-1000

04

K-1000

Deputy Chief | Office of Technology & Innovation

May 2025 — Present · On-site · Bhubaneswar, Odisha

Developing Android and Flutter applications with reusable UI structures and backend-integrated mobile workflows.

Developed and deployed the official K1000 website using React.js and Next.js for organizational platforms and event initiatives.

Integrated REST APIs, asynchronous data handling, and dynamic frontend rendering across internal systems.

Contributed to technical coordination, event execution, operational planning, and platform management across multiple organizational initiatives.

Project ManagementStrategic PlanningLeadership

03 / Portfolio

Selected Works

A curated selection of systems, product builds, and technical experiments shaped into portfolio-ready case studies.

Selected systemRepository ↗

Rail

Designed an offline-first payment orchestration service with deferred synchronization pipelines that maintain operational continuity during unstable network conditions.

Implemented retry-safe transaction execution, local persistence with reconciliation, and resilient queue-based processing inspired by distributed settlement systems.

Engineering analysis

Authorization-first execution separates permission to spend from the actual transfer. PostgreSQL stores reservations, token headroom, idempotency records, and ledger events; both immediate execution and reconnect-time replay use the same pipeline. The architectural value is consistency across retries—not replacing a bank or claiming production payment readiness.

Explore the README ↗

TypeScriptSync EngineResilience

Challenge

Needed a backend model that could preserve payment intent, authorization rules, and replay-safe execution even when devices reconnect late or retry aggressively.

Implementation

Shaped Rail as a control-and-execution layer that handles offline initiation, bounded authorization, queue replay, and ledger visibility without pretending to replace settlement rails.

Design takeaway

The biggest lesson was that reliability in fintech UX comes as much from state design and idempotency discipline as from the API layer itself.

04 / Stack

Capability Atlas

Tools connected to actual work. No proficiency scores—follow the implementation instead.

Core tools

Across frontend platforms and Android delivery.

React
TypeScript
Next.js
Kotlin
Node.js

Applied in projects

Selected implementation paths you can inspect.

FastAPI
Postgres
Redis
Flutter
SQLite

Currently exploring

Learning directions, not claims of mastery.

Distributed systems
System design
Software architecture

Supporting toolkit

Additional technologies from my existing stack.

C
Dart
Java
HTML5
Python
Vercel
Firebase
Google Cloud
TailwindCSS
React Router
OpenCV
Express.js
MongoDB
MySQL
Git
JavaScript
CSS
C++
Tcl

05 / Signals

Signals

The numbers, notes, and credibility markers that make the work easier to evaluate beyond visuals alone.

Fit

Working signal

Open for strong-fit rolesAvailable for software engineering roles, product-focused internships, and serious collaboration across web, backend, and Android systems.

Core working lanesMost effective in frontend systems, backend coordination, Android delivery, and product interfaces that need both structure and taste.

Execution styleFast iteration, reusable architecture, calm interface decisions, and technical communication that stays clear under pressure.

What I optimize forMaintainability, trust, interface clarity, and systems that continue to feel stable when real users, changing content, and scaling pressure arrive.

Writing

Field notes in progress

Drafting now

Designing Rail For Retry-Safe Offline Execution

Notes on authorization windows, replay-safe backend execution, and why payment reliability is often a state-machine problem before it is a UI problem.

Explore the implementation behind these notes ↗

Publishing soon

What Makes An Interface Feel Trustworthy

A working note on confidence-first hierarchy, calmer fintech surfaces, and how interaction tone changes user trust in transactional flows.

In progress

Reusable Frontend Systems For Student-Led Platforms

A breakdown of how modular UI structure, predictable rendering patterns, and deployment discipline helped K1000 scale beyond a one-off website.

Proof

Collaboration signal

Collaboration mode

Product-minded engineering with equal attention to structure, execution clarity, and how the work is communicated to users.

Delivery environments

Hands-on across internships, student organizations, platform builds, Android applications, and design-sensitive frontend systems.

References

Direct references and collaboration context can be shared during serious conversations and role-based discussions.

06 / GitHub

Telemetry

A professional snapshot of public repository activity, contribution consistency, and open-source output across the past year.

Public repos33

Followers5

Total stars21

Past year contributions1039

Last saved GitHub snapshot · refreshed when connected

Activity is a trace of the work, not a quality score. Repository languages count public repositories—not lines of code or proficiency.

Contribution activity

Past 12 months

Oct 2025 → Oct 2026

OctNovDecJanFebMarAprMayJunJulAugSepOct

MonWedFri

LessMore

Profile signal

Pre-Final Computer Science Geek | KiiT'2028 | Languages : Typescript - Java - Kotlin

The public graph reflects a mix of Android, frontend, and backend experiments shaped into real portfolio systems.

Most used languages

Current snapshot

33 public repositories, 21 total stars, and 1039 tracked contributions across the last twelve months.

07 / Contact

Connect

Have a product worth building? Let’s talk.

Open to product work, engineering partnerships, and thoughtful frontend builds.

Available for selected collaborations

chatterjeerohan0204@gmail.com

Email Rohan ↗Download Resume ↗

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RohanChatterjee

Code · Create · Collaborate.

Start a conversation ↗Download résumé ↗