Developer Summit 2025: Security Shield with API Gateway — Real-World Scenarios of OAuth, JWT, and Rate Limiting

DigitalCosmonot participated as a speaker at Devnot Developer Summit 2025, held on October 18, 2025, at Sheraton Grand Hotel in Istanbul. At one of Turkey's largest software developer summits, our session delivered by Selim Çalık provided deep technical insight focused on API security.

Security Shield with API Gateway

At the core of our presentation was the premise that API Gateway is not merely a routing and integration layer but a critical component of enterprise security architecture. We explored OAuth 2.0 authorization flows, JWT-based authentication mechanisms, and Rate Limiting strategies through real-world scenarios drawn from production environments, going well beyond theoretical frameworks.

Topics Covered in the Presentation

• Implementing OAuth 2.0 flows on API Gateway: Authorization Code, Client Credentials, and PKCE scenarios
• JWT validation and token management: signature verification, expiration policies, and claim-based authorization
• Rate Limiting strategies: comparing fixed window, sliding window, and token bucket algorithms
• Real-world attack scenarios and API Gateway's defense mechanisms against these threats
• Centralized management and enforcement of enterprise API security policies

Why Real-World Scenarios?

Theoretical knowledge about API security is abundant, but the real challenges encountered in production environments are rarely covered in documentation. In our presentation, we deliberately focused on concrete scenarios rather than abstract concepts: a token leakage incident in a financial institution's OAuth flow, the performance trade-offs of Rate Limiting configuration on a high-traffic API, and common configuration mistakes in JWT validation were examined in depth.

Developer Summit Experience

Devnot Developer Summit brings together hundreds of developers, architects, and technical leaders as one of Turkey's most comprehensive software developer events. Addressing a critical topic like API security on this platform and receiving strong interest from participants once again reinforced DigitalCosmonot's technical authority in the industry. We extend our gratitude to the Devnot organizing team and all developers who attended our session.