
Backend Developer
4 days ago
We're looking for an experienced Backend Developer to join our team and help build a GSMA TS.43-compliant Entitlement Server for RCS activation. You'll work on high-scale backend APIs, authentication flows (OAuth2, EAP-AKA), and telecom integrations (AAA, HSS/UDM).
Core Responsibilities- Design and develop Entitlement Configuration Service using Java (Spring Boot) or Go.
- Build and maintain REST APIs for token exchange, session management, and Entitlement Configuration Service-Google integrations.
- Integrate with external protocol libraries (e.g., Diameter client, EAP handlers) under telecom consultant guidance.
- Handle state management for short-lived authentication tokens, replay protection, and secure session storage.
- Optimise system for low latency, high throughput, and telecom-grade reliability.
- Ensure TLS/mTLS security across all communication channels.
- Strong command of Java (Spring Boot) or Go.
- Hands-on with REST API design, JSON/XML parsing, JWT handling.
- Solid understanding of secure authentication mechanisms (OAuth2, SAML, PKI).
- Experience working with protocol adapters or third-party libraries (Preferred exposure to Diameter, RADIUS, or SIP stacks).
- Strong debugging skills using Wireshark, tcpdump, or protocol analyzers.
- Familiarity with SQL/NoSQL databases (e.g., PostgreSQL, Redis).
- Min 5 Years of Experience
- Mid-Senior level
- Full-time
- Engineering and Information Technology
- IT Services and IT Consulting
Location: Rawalpindi, Punjab, Pakistan
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