Debayan Das

Software Engineer

I build data pipelines and cloud infrastructure on GCP, and ship the Flutter apps that run on them.

Most engineers pick a layer. I work across the stack because I've seen how backend choices show up in what users experience.

Currently @ Breakthrough Apps → ETL, Backend systems, Flutter

View Work Get in Touch

01.

A bit about me

In 2019, I downloaded an open-source anime streaming app from GitHub. I ended up reading its Kotlin source code and couldn't figure out how text on a screen turned into a working application. That's what got me into programming.

I started where most people start, building UIs and mobile apps. But I kept wondering what was behind the screen: how data moved, where it lived, why things broke at scale. That pulled me from frontend work into backend systems, then cloud infrastructure and data pipelines.

Right now at Breakthrough Apps, I build ETL pipelines on BigQuery, write serverless automation on GCP, and maintain the Flutter apps that sit on top of it all. The full picture helps. When you ship the product and the infrastructure, you make different tradeoffs than if you only see one side.

I use AI tools like Claude Code to move faster. They're good at the mechanical parts of building and debugging when you already know what you're building.

02.

Experience

Software Engineer

Aug 2024 — Present

Breakthrough Apps Inc. New York (Remote)

Design and maintain ETL pipelines on BigQuery and Cloud Functions, processing billing and analytics data from Stripe, RevenueCat, and Firebase.
Built a unified backend for subscription management across App Store, Play Store, Stripe, and RevenueCat.
Took crash-free sessions from 66% to 94% through structured logging, monitoring, and better error handling.
Built serverless automation on Google Cloud Functions, cutting manual ops work by about half.
Ship and maintain Flutter apps across release cycles, owning features from backend API through mobile UI.

GCP BigQuery Cloud Functions Express.js TypeScript Flutter SQL AWS

App Development Intern

Jun 2024 — Aug 2024

Pherico Remote

Built auth and role-based access control with Firebase Auth and Firestore Security Rules.
Integrated REST APIs into Flutter apps and contributed to backend services on Cloud Functions.

Firebase Node.js Flutter GCP

Freelance Engineer

May 2024 — Jul 2024

Horizon Views Remote

Built a Security Staff Operations Portal for managing field ops, scheduling, and reporting.
Solo engineer, from requirements through deployment.

Flutter Firebase Node.js

Fullstack Product Engineer — Intern

Jan 2024 — Jul 2024

Locamart Online Services Noida, India

Built a hyperlocal commerce platform from scratch: Django backend, Flutter mobile client, Firebase for the real-time data layer.
Designed NoSQL data models for real-time inventory and order processing.
Set up CI/CD pipelines and deployment automation.

Django Flutter Firebase NoSQL CI/CD

03.

Featured Projects

Lacia

Autonomous SRE Agent

Self-hosted agent that watches production logs, reproduces crashes in a sandbox, and opens tested pull requests. No human in the loop.
Control plane in Next.js. A Go-based Watcher CLI streams stack traces via webhooks.
Google Gemini handles root cause analysis through structured tool calls.
Sandboxed test execution and PR automation via GitHub API.

"Autonomous debugging: production error to tested, mergeable PR."

Next.js Go Node.js Docker SQLite Webhooks GitHub API

EverYou

AI-powered digital legacy platform

Digital legacy platform running Django on GCP Compute Engine.
Async job processing for AI tasks so inference doesn't block user requests.
Rate limiting, structured logging, and health monitoring for third-party AI APIs.

"Backend built to handle unpredictable AI workloads without blocking user requests."

Django GCP Compute Engine Async Processing AI API Integration

View more on GitHub

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