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Debayan Das

Software Engineer

I build Typescript backends and cloud infrastructure on GCP and AWS, then ship the Flutter apps that run on top.

Now

@ Breakthrough Apps → TypeScript backend, GCP & AWS infrastructure, Flutter apps

See my work Reach out

ABOUT

How I got here

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: 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 into backend systems with TypeScript and Node.js, then cloud infrastructure on GCP and AWS.

Right now at Breakthrough Apps, I write TypeScript across the stack: serverless APIs on Cloud Functions, subscription and billing backends, and the Flutter apps that consume them. Shipping both sides changes how you build. You make tradeoffs you'd miss if you only saw one layer.

I use AI tools like Claude Code for the mechanical parts. They make me faster when I already know what I'm building.

EXPERIENCE

Where I've worked

Software Engineer

Aug 2024 — Present
Breakthrough Apps Inc. New York (Remote)
  • Design and maintain ETL pipelines on BigQuery and Cloud Functions that process billing and analytics data from Stripe, RevenueCat, and Firebase.
  • Cut partner onboarding manual work by 50% by replacing it with an infrastructure-automation stack: a Dockerized Express service on AWS, Pulumi-managed GCP provisioning, and scripts for data seeding, PR creation, and third-party integration setup.
  • 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.
  • Replaced recurring ops workflows with Cloud Functions running on a schedule, freeing the team from manual maintenance toil.
  • Ship and maintain Flutter apps across release cycles, taking features from API design to 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

WORK

Selected projects

Lacia

Autonomous SRE Agent

  • Self-hosted agent that watches production logs, reproduces crashes in a sandbox, and opens tested pull requests end to end, without a 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.

→ Impact

Autonomous debugging: production error to tested, mergeable PR.

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

EverYou

Digital legacy platform with AI-driven memory generation

  • 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.

→ Impact

The backend handles unpredictable AI workloads without blocking user requests.

Django GCP Compute Engine Async Processing AI API Integration
View more on GitHub

STACK

What I reach for

languages

  • TypeScript
  • Dart
  • Python
  • SQL
  • Go

backend

  • Node.js / Express.js
  • PostgreSQL
  • Firebase
  • NoSQL

cloud

  • GCP (Cloud Functions, Cloud Run, BigQuery, Pub/Sub)
  • AWS (Lambda, S3, RDS)
  • Docker
  • Pulumi
  • CI/CD

mobile

  • Flutter

CONTACT

Inbox is open.

Backend systems, cloud, or mobile work — happy to talk.

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