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Building practical software for real-world use cases: healthcare, public systems, and web platforms.

I'm a software engineer focused on building reliable systems for real people: public platforms, health records, and tools that quietly run in the background and just work. I enjoy taking messy, high-stakes problems and turning them into simple, dependable software.

01 / Who I Am

About Me

I'm a software engineer with a background in electrical engineering and a habit of building things that solve real problems. I like working on both backend systems and frontend interfaces, as long as the outcome is clean, predictable, and useful in the real world.

A lot of my work sits at the intersection of public systems, healthcare tech, and Web3. I've worked on patient record systems with offline sync, document workflows with e-signatures, and agentic AI tools that plug into existing workflows instead of replacing them. I enjoy taking vague requirements, understanding the real need, and then shaping them into straightforward, maintainable software.

Outside of code, I like calisthenics, music, and low-budget trips to the hills. I also spend time in developer communities, sharing what I learn, learning from others, and contributing to open-source tools when I can. I strongly believe small, honest contributions and collaboration move technology forward more than buzzwords ever will.

Interests

Public-Interest Tech Backend & Platform Engineering Web3 & Blockchain Developer Relations Security & Auth
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Projects Built
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Hackathons
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Certifications
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Technical Blogs

Key Achievements

2x Hackathon Winner

Won Jun 2025 Anveshan Hackathon & Dec 2025 Hackarena 2.O Hackathon By Masai School in Software Development

Technical Writing Prize

2nd Position at DevRel Uni Cohort 6 & Prize from The Arbitrum Foundation

Community Leadership

Managed Global Member Communities & Blockchain initiatives

02 / Where I’ve Worked

Professional Experience

Software Engineering Intern

Confidential (under NDA)

Jan 2026 to Present

Backend engineering on large-scale public-sector platforms. Migrated core services from Python to Node.js/TypeScript, integrated single sign-on end-to-end (IdP-initiated login, single logout, email-OTP MFA), and hardened file-upload and API flows. Built KPI dashboards, org-hierarchy trees and a document-viewer experience, and ran a Google Maps / BigQuery data pipeline for a pilot program. Worked closely with stakeholders, communicated clearly across teams, and delivered under tight, high-pressure deadlines.

Node.js TypeScript Prisma SSO / Auth BigQuery Stakeholder Consultation Working Under Pressure

Web3 Project Administrator

O3 Labs Inc.

Jul 2022 - Feb 2024

Led community moderation and technical support for 50K+ global user base across diverse time zones. Contributed to business development and enhanced blockchain adaptation overall.

Community Management Web3 Blockchain Technical Support Business Development

Web3 Administrator

Theia Studios

Jan 2022 - May 2022

Moderated gaming communities and explained blockchain concepts in accessible language. Provided technical support and contributed to business development strategies for blockchain gaming ecosystem.

Community Moderation Blockchain Education Gaming Technical Support
03 / Things I’ve Built

Featured Projects

I design and build full-stack applications, from database schemas and APIs to responsive frontends. My focus is on things that are easy to reason about, easy to maintain, and actually useful for the people who use them.

SpendLens

SpendLens - Offline UPI & Expense Tracker

Offline-first Android app that turns UPI and bank notifications into a private, on-device spending ledger. Zero network permission, AES-256 encrypted, open source.

Kotlin Jetpack Compose Android Privacy
CIVIC AI Guardian

CIVIC - Client-side AI Guardian

An on-device AI guardian that flags risky content and calls (misinformation, phishing, "digital arrest" scams) in real time while preserving user privacy. Built for eRaksha AI for Peace & Safety Initiative

AI/ML Privacy On-Device
Gemini Adaptive Planner

Gemini Adaptive Planner

Your smart learning buddy - an app that actually understands you and your time and goals. Built for Google DeepMind - Vibe Code with Gemini 3 Pro Hackathon.

Gemini 3 Pro Preview Google AI Studio Prompt Engineering AI Agent
Smart City OS

Smart City OS - A Smart City Management OS

AI-powered IoT Embedded Smart City Management OS / Application which tracks city wide sensor data and uses those data to predict and take better management decisions.

Blockchain AI/ML Models Supabase IoT
PHC Commons

PHC Commons - Public Health Center Management

Full Stack Web Application for Medical PHCs, Government, and Private entities. Built during MasaiVerse x platformcommons Hackarena Hackathon.

Container App Progressive Web App Hackathon
LifeWeeks AI Timeline App

LifeWeeks - Your Life in 4,000 Weeks

AI-powered interactive timeline application that visualizes your life week by week. Hackathon winner with advanced AI features.

Next.js AI Integration PostgreSQL Hugging Face
Daily Spark Solana

Daily Spark Solana - A Dapp on Solana Devnet

An interative web3 application built on Solana Devnet. With Working frontend and anchor programs deployed on Solana Devnet.

Solana Program Blockchain Programming Smart Contracts Frontend Development
LogisTech

LogisTech - Warehouse Orchestration System

Centralised warehouse orchestration system built as a backend assignment. Targeted for Logistics and Warehousing sectors.

Backend Logistics Warehouse
Smart CRM System

Smart CRM System

Full Stack Web Application for Gym Owners & Business Owners. Built for Masters' Union Hackathon.

Full Stack CRM Business Tool
Xporter

Xporter - Universal Gateway CLI

Universal Gateway CLI for x402.org protocol by Coinbase. Built during Solana and Base x402 Hackathon.

Rust CLI Solana x402
Hangoutly

Hangoutly - Event Planning App

Full Stack Web Application for planning hangouts and outings. Built for MasaiVerse x Nobroker Hackarena Hackathon.

Full Stack Event Planning Social
Stylus SDK Technical Articles

Stylus SDK Technical Documentation

Comprehensive technical articles and smart contract development guides for Stylus SDK during DevRel Uni Cohort 6. Winner of Technical Writing Prize.

Technical Writing Web3 Education Smart Contracts Developer Relations
Job Portal Full Stack Application

Job Portal - Full Stack Application

Complete job portal platform with user authentication, job posting, application tracking, and real-time notifications.

React.js Node.js MongoDB REST API
SkillSync Matching Platform

SkillSync - Intelligent Recruitment Platform

Advanced candidate-recruiter matching platform with intelligent algorithms, real-time communication, and comprehensive analytics dashboard.

Node.js SQL Database Matching Algorithms Team Leadership
XDA Developers Technical Articles

Android Modding on XDA Forums - Technical Writing

7+ years of technical writing and community contributions on XDA Developers and related forums. Published tutorials, guides, and system modification articles.

Technical Writing Android Development Community Building System Modification
04 / My Toolkit

Technical Skills

A polyglot engineer with hands-on experience across the stack, from low-level systems programming to modern, full-stack web applications.

Languages

C++PythonJavaScriptTypeScriptSQLRust

Frontend

ReactNext.jsHTML5/CSS3Tailwind CSS

Backend

Node.jsExpress.jsJWT AuthREST APIs

Databases & BaaS

PostgreSQLMongoDBSupabaseNeon

Web3 & Protocol

SolanaAnchorSmart ContractsProtocol Security

DevTools & Concepts

Git/GitHubDockerSystem DesignAlgorithms

Collaboration & Delivery

CommunicationStakeholder ConsultationWorking Under PressureDocumentationTeam Collaboration

Academic & Hardware Projects

Foundation projects from my Electrical Engineering background, showcasing hands-on experience with circuit design, signal processing, and embedded systems.

Digital Signal Processing Suite

Advanced signal processing algorithms for real-time audio and biomedical signal analysis with MATLAB and Python implementation.

MATLAB Python NumPy Signal Processing

AC-DC Inverter Fabrication

Group project designing and building a homemade AC-DC inverter for portable power solutions. Hands-on electrical engineering experience.

Circuit Design Power Electronics Analog Circuits Team Project

IC555 Timer Relay Circuit

Electronic circuit project implementing precise time delay functionality using IC555 timer and microcontroller integration.

IC555 Microcontrollers 8051 Embedded Systems
05 / Where I Studied

Education

Computer Science Engineering

IIT Guwahati

May 2024 - December 2025

Computer Science Engineering Credit Linked Program with Masai School and NSDC. With focus on AI, secure systems, and high-performance software. Specializing in System Design, algorithms, and S-SDLC principles.

C++ System Design and Architecture Database Algorithms Data Structures

Electrical Engineering

XXXX Govt. Engineering College

Aug 2020 - Aug 2023

Comprehensive electrical engineering education covering power systems, power generation, control theory, and digital electronics systems.

Circuit Design Power Systems Control Theory Embedded Systems Microcontrollers
06 / Writing

Technical Blog

Sharing Knowledge Through Writing

I write about the things I actually work on: public-interest and civic tech engineering, backend and security, Web3 and developer relations. Some of it is tutorials, some of it is honest field notes from inside the systems I've helped build.

Visit My Blog

Tutorials and field notes on the things I build.

Read My Articles

Topics I Write About

Public-Interest Tech Civic Tech Backend & Security Developer Relations Web3 & Smart Contracts Technical Writing Open Source
07 / Credentials

Certifications & Training

Certifications

08 / Say Hello

Get In Touch

Let's Connect

I'm always open to conversations about software engineering, public-interest and healthcare tech, and Web3. Whether it's a role, a collaboration, or a quick question, I like clear communication and I'm happy to talk a problem through with anyone on the team.

iamcsubrata@gmail.com
+91 XXXXX XXXXX
Kharagpur, WB

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