Gagandeep Singh.

Backend & Cloud Engineer · Open to work

Backends that scale.
Clouds that stay up.

I'm Gagandeep — a backend engineer at Invenco by GVR, building event-driven services and the AWS infrastructure behind them. I care about latency, cost, and systems that don't wake anyone at 2 a.m.

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Focus
Backend & Platform
Cloud
AWS · OCI
Base
Bangalore, IN
Portrait of Gagandeep Singh
Your portrait · 4:5
TypeScriptGolangNode.jsPostgreSQLMongoDBKafkaAWSDockerMicroservicesREST APIs

01 — Experience

Where I've worked

Full résumé ↓
Jun 2026 — PresentInvenco by GVRBangalore, IN

Associate Software Engineer

  • Owned an end-to-end authorization caching solution — replaced a 100M+ record materialized view with an event-driven in-memory cache, cutting auth latency from 1–5s to <10ms p99.
  • Built 8 CDC event handlers on Kafka/ECS with parallel reads, pipelined writes, optimistic locking, a DLQ, and sub-60s lag observability; scaled to 100K QPS at ~$5.9K/yr vs a $28K/yr alternative.
  • Published an internal TypeScript authorization library with typed single-call APIs, pooling, and TLS retry — removing main-DB I/O load and standardizing auth across services.
  • Delivered 70% of a remote provisioning system for the service certificate hierarchy (infra, backend, deploy), automating mTLS issuance and zero-downtime rotation.
  • Implemented the CA hierarchy on AWS (ECS, Secrets Manager, RDS, SQS) with retries and CloudWatch alarms; cut manual provisioning effort by 80%.
  • TypeScript
  • Golang
  • AWS
  • Kafka
  • PostgreSQL
  • Docker
Jul 2025 — Jun 2026Invenco by GVRBangalore, IN

Software Development Intern

  • Increased team productivity by 40% by building custom AI integrations and IDE workflows that automated development, documentation, and GitHub/Confluence tasks.
  • Remediated pentest findings — stored XSS, CSV injection, user enumeration, access-control gaps, and auth rate-limiting — and patched cloud security issues via runtime upgrades.
  • Built backend REST APIs for an IoT core platform (asset, auth, device management) and contributed to a payment-bridging system with fault-tolerant error handling.
  • Node.js
  • Golang
  • REST APIs
  • AWS Lambda
  • PostgreSQL

02 — Selected work

Things I've built

GitHub ↗
Project image

01

Autodoc — AI Documentation Platform

AST parsing, call graphs, and RAG chat with auto Git-push; supports JS/TS/Java/Python with PDF extraction.

  • Node.js
  • React
  • RAG
View project →
Project image

02

Golang Microservices

Five services on gRPC + RabbitMQ with Docker Compose, Postgres/MongoDB, and centralized auth.

  • Golang
  • gRPC
  • Docker
View project →
Project image

03

Java AST Parser (NPM)

Published an NPM package that parses Java source into ASTs using a custom-built lexer.

  • Node.js
  • NPM
View project →

04 — Writing

Notes on building & running things

All posts ↗
Oct 2026

Cutting my cloud bill with three boring changes

Sep 2026

Idempotency keys, explained with coffee

Aug 2026

Running Postgres on a free-tier VM: what I learned

Photo · 4:5

03 — About

I care about systems that are simple to run, cheap to operate, and hard to break.

I build backend services and the infrastructure around them — APIs, background jobs, databases, and deploys. I like the unglamorous parts: clear logs, health checks, sensible defaults, and automation that removes 2 a.m. pages.

Outside of work I write about cloud cost, self-host side projects on Oracle's free tier, and tinker with containers.

Backend

  • Golang
  • TypeScript
  • Node.js
  • Express.js
  • REST APIs
  • PostgreSQL
  • MongoDB

Cloud & DevOps

  • AWS (EC2, ECS, Lambda)
  • Docker
  • Kafka / MSK
  • MemoryDB
  • Secrets Manager
  • VPC & Security Groups
  • GitHub

05 — Contact

Let's build something dependable.

Have a role, a project, or a gnarly infrastructure problem? I'd love to hear about it. I usually reply within a day.