What Is a Reverse Proxy? (And Why Every Backend Developer Should Care)

Last Updated on May 29, 2026 by Editorial Team Author(s): Error Originally published on Towards AI. What Is a Reverse Proxy? (And Why Every Backend Developer Should Care) Imagine you’ve built a web app. You have a backend API, maybe a separate service for authentication, another for image processing, and a frontend. They all run on different ports or even different servers. A user types your domain into their browser — how does the request know where to go? Reverse Proxy FlowAfter the lead, the article explains what a reverse proxy enables—load balancing, SSL/TLS termination, caching, compression, request routing across multiple services, security hardening, and hiding infrastructure—then clarifies what “proxy” means in general and contrasts forward vs reverse proxies. It walks through a step-by-step request flow from browser to backend (DNS to proxy, routing, forwarding with headers like X-Forwarded-For, backend processing, and proxy response handling) and highlights common real-world tools such as Nginx, HAProxy, Traefik, and Envoy. The piece concludes that if you’re running more than one service or need real security/performance, a reverse proxy is essential, and starting with Nginx can simplify early setup while letting the proxy scale as your system grows. Read the full blog for free on Medium. Join thousands of data leaders on the AI newsletter. Join over 80,000 subscribers and keep up to date with the latest developments in AI. From research to projects and ideas. If you are building an AI startup, an AI-related product, or a service, we invite you to consider becoming a sponsor. Published via Towards AI