Saifullah Khan

I build real-time backends and the systems businesses run on.

Backend-leaning engineer

TypeScript · NestJS · PostgreSQL · Redis

India

IST

The real-time multiplayer backend behind a browser PVP game.

Activity

Projects & writing

The real-time multiplayer backend behind a browser PVP game.

Automated a weekly billing audit from 4–6 hours down to about 20 minutes.

Experience

Australia (Remote)

Full-time · 09.2025–∞ · 1y

Took ownership of a stalled Medusa/Node.js backend, fixed data sync issues, and shipped the product in 4 months.
Diagnosed CRM sync failures across serverless timeouts and database permissions; moved the backend to a VPS and migrated the database with zero data loss.
Served as the primary technical contact, turning client requirements into priorities and shipping features independently.
Built a RAG bot handling 100+ customer queries/month and a Next.js dashboard for staff to deploy bots without engineering help.
Shipped a PostHog → PostgreSQL → GrowthBook analytics pipeline in 1.5 weeks so marketing could run experiments independently.

Node.jsMedusaLinux/VPSNext.jsPythonLlamaIndexOpenAIGrowthBook

Mumbai, India (On-site)

Internship · 12.2024–05.2025 · 6m

Synced Zoho CRM contacts, leads, and invoices into MongoDB for 3 downstream apps.
Automated report generation and record cleanup via CRM webhooks and cron jobs.
Replaced 10+ manual logging workflows with Zoho Flow, saving 10+ hours/week of data entry.

Zoho CRMMongoDBWebhooksZoho Flow

Stack

01 Language