Backend Engineer Internship

Backend Engineering Intern (Node.js / TypeScript / Supabase) Position Summary We are seeking a Backend Engineering Intern with strong fundamentals in Node.js and TypeScript to join Irnofic's founding team. Irnofic is building a multi-tenant AI WhatsApp SaaS platform — powering autonomous AI assistants for businesses on WhatsApp. You will work directly on the core infrastructure: webhook pipelines, multi-tenant data isolation, background job queues, and AI orchestration with Claude. This is production-grade work on a live system. If you want 6 months of real SaaS backend experience that you can point to — this is it. Key Responsibilities * Build and maintain webhook handlers that receive, verify, and process WhatsApp messages from Gupshup at scale. * Write Supabase (PostgreSQL) queries, design schema changes, and implement Row Level Security policies for tenant data isolation. * Integrate and maintain background job queues using Trigger.dev for broadcasts, reminders, and scheduled automation. * Implement per-tenant rate limiting using Upstash Redis with sliding window counters. * Work with the Claude AI API — structuring prompts, handling tool use blocks, and building the tool executor pipeline. * Write idempotency logic to prevent duplicate message processing on webhook retries. * Participate in code reviews, architecture discussions, and sprint planning. Required Skills / Qualifications * Solid working knowledge of Node.js and TypeScript. * Comfortable writing SQL — joins, filters, inserts, indexes. * Understands REST APIs and webhooks — has handled an inbound POST request before. * Has built something real, even a personal or college side project. * Git basics — branching, pull requests. * Knows why an API key must never appear in frontend code. Preferred Skills / Experience * Any hands-on experience with Supabase or PostgreSQL. * Exposure to Redis or any queue/job system (BullMQ, Trigger.dev, etc.). * Familiarity with HMAC signature verification or webhook security patterns. * Experience consuming third-party APIs (any platform — payment, messaging, etc.). * Basic understanding of multi-tenancy and data isolation concepts. Engagement Details * Duration: 6 months * Location: Hybrid — Mumbai * Compensation: Paid internship * Screening: A small paid technical task will be assigned before onboarding Skills: Node.js, TypeScript, PostgreSQL, Supabase, Redis, REST APIs, Trigger.dev, Webhook Integration Do Fill the form https://docs.google.com/forms/d/e/1FAIpQLScq2DpXVWxlt61hsiN4qUD\_F5R7OQ1yHzRjhbZG51r9joHx\_Q/viewform?usp\=dialog Pay: ₹3,000\.00 - ₹5,000\.00 per month Work Location: Hybrid remote in Kamothe, Navi Mumbai, Maharashtra