Looking for a job

Karan H

@karanh

Message

I build high-throughput Node.js microservices, event systems, and SaaS backends that scale reliably.

India

Message

What I'm looking for

I'm open to remote opportunities where I can build and scale reliable, high-throughput backend systems for B2B SaaS.

At Food Market Hub, I architected a Node.js, Fastify, GraphQL, and PostgreSQL microservices backend from scratch, scaling it to 200+ B2B customers with 99.9% uptime through 3x traffic growth.

I built systems that process 10M+ transactional emails, 5M+ monthly event notifications, and 2M+ PDFs each month, with SQS autoscaling, retries, structured logging, and zero document loss under load.

I've improved PostgreSQL and core-service efficiency by 30%, reduced data export times by 98% with AWS Glue, S3, and Athena, and owned backend architecture and production stability end-to-end across startup projects.

Experience

Work history, roles, and key accomplishments

Current

Senior Backend Engineer

Current

Food Market Hub

Mar 2022 - Present (4 years 6 months)

Architected a scalable microservices backend from scratch using Node.js, Fastify, GraphQL, and PostgreSQL, scaling to 200+ B2B customers with 99.9% uptime. Built high-throughput email and event notification services, and optimized PostgreSQL queries improving system efficiency by 30%.

NodeJS Fastify GraphQL PostgreSQL Microservices Amazon SQS AWS Glue S3 Athena Xendit Boost Seedflex HTML To PDF Retry Logic AutoScaling Monitoring Observability

Junior Backend Developer

Easeyourlife

Jul 2019 - Feb 2022 (2 years 7 months)

Built and scaled RESTful APIs and database models using Node.js, Express, and Firebase, supporting high-traffic user flows. Integrated payment gateways and third-party services end-to-end, and implemented unit testing and monitoring to improve reliability.

NodeJS Express Firebase REST APIs Payment Gateways Unit Testing Monitoring Database Design