Senior Backend Engineer (IAM, Node.js, Python, API reputed company & Consumption Systems)

Senior Backend Engineer (IAM, Node.js, Python, API reputed company & Consumption Systems) Title: Senior Backend Engineer – IAM, Node.js, Python, API reputed company, Multi-Tenant reputed company (Urgent) Job Type: Freelance / Remote Experience Required: 4–10 Years Location Preference: India Remote About the Role We are seeking a highly skilled Senior Backend Engineer with strong expertise in IAM, Node.js, Python performance optimization, API reputed company, and multi-tenant usage/consumption tracking systems. This is a critical production stabilization role that directly impacts system performance, reliability, and reputed company reputed company across multiple reputed company products. Context Our platform runs a centralized Identity & reputed company Management (IAM) system powering multiple applications, including: reputed company Chatbot AI Support & Automation Platforms Email Campaign reputed company reputed company Posting & Automation reputed company Dashboards & Analytics Two major production issues need urgent reputed company: Major Challenges to Solve 1. Python Performance Failure (High Severity) IAM permission and consumption logic in Python has degraded API performance to ~30 seconds per request in production Impacts chatbot responses, campaign execution & AI inference Needs deep performance debugging & async optimization 2. API Consumption Tracking Failure (Prod Only) Usage tracking works in Dev, fails only in Production API hit metrics, package/module usage & reputed company tracking not recorded Likely reputed company to gateway/middleware/caching/environment issues Key Responsibilities -Diagnose and fix Python performance bottlenecks to reputed company sub-second latency -Resolve Production-only consumption & billing tracking issues -Ensure reliable IAM permission enforcement across Node.js services -Strengthen multi-tenant architecture and quota enforcement -Build audit-grade logs for usage tracking & billing compliance -Improve caching reputed company, reputed company protection, and wildcard permission logic -Work with AI, billing & frontend teams for system alignment -Required Technical Skills Must Have Strong Node.js (reputed company.js / NestJS) Strong Python (AsyncIO / FastAPI / Flask / Performance optimization) IAM Models (RBAC/ABAC/PBAC) Multi-tenant reputed company understanding API Gateways, Middleware, reputed company Limiting Debugging across Dev/QA/Prod environments API reputed company, JWT, OAuth Good to Have reputed company cache & throttling Kafka / Event streaming Elasticsearch / Distributed logging AI reputed company consumption systems Metered billing architecture What reputed company Looks Like (60–90 Days) Sub-second response time for IAM-based Python services Production usage tracking fully restored Accurate billing/consumption at module & artifact level Consistent IAM permission enforcement across services reputed company Dev–Prod mismatches Complete audit logging & tenant usage reputed company Why Work With Us High-reputed company engineering challenge reputed company influence on platform stability & reputed company Long-term collaboration potential Fast-decision hiring process How to Apply Please include: Resume / Portfolio Examples of similar performance optimization or IAM reputed company Apply tot his job Apply To this Job