API Authentication & Authorization
OAuth 2.0 flows, JWT structure and validation, API keys, mTLS, OIDC, token introspection, and Spring Security integration.
OAuth 2.0 flows, JWT structure and validation, API keys, mTLS, OIDC, token introspection, and Spring Security integration.
Network security fundamentals for software engineers — firewalls, VPNs, network segmentation, DDoS mitigation, DNS security, zero trust networking, mTLS, and cloud network controls.
Enterprise engineering guide to securing payment processing systems — client-side mTLS, RFC 9421 HTTP message signatures, DPoP token binding, PSD2 dynamic linking, internal Zero Trust SPIFFE mesh, PCI-HSMs, tokenization vaults, and Maker-Checker dual control.
Deep-dive into Service Mesh architecture — Envoy internals, xDS API, mTLS certificate lifecycle, traffic management patterns, observability, Spring Boot integration, and production failure modes for senior engineers.