Role Overview

U2opia Mobile is seeking a Backend Engineer to design, build, and maintain entitlement server modules, APIs, and automation workflows. The role involves collaborating with telecom integration engineers to enable seamless SIM-based authentication and entitlement flows.

Key Responsibilities

• Develop backend services and APIs using Java Spring Boot, Python, or Go.
• Implement entitlement server logic for silent authentication (EAP-AKA, fallback).
• Build microservices and containerized deployments (Docker, Kubernetes, Helm).
• Maintain CI/CD pipelines (GitHub Actions, GitLab, Jenkins).
• Implement logging, monitoring, and observability (Prometheus, Grafana, ELK).
• Collaborate with QA for automated test suites (unit + integration, >70% coverage).
• Work with integration engineers to expose APIs for HSS, AAA, UDM, PCRF.
• Ensure security-first development: input validation, encryption, token flows.

Job Requirements

• Strong backend development experience (Java, Go, or Python).
• Solid understanding of REST/GraphQL APIs, microservices, and API gateways.
• Familiarity with containerization (Docker/K8s) and cloud deployment practices.
• Good knowledge of authentication/authorization flows (OAuth2, OpenID, or telecom-specific EAP-AKA preferred).
• Exposure to telecom or networking systems is a plus.