Senior Backend Developer (Python)

The Role

You will be responsible for building the core backend systems that power our MVNO. This includes our real-time policy and charging engine (PCEF), our subscriber provisioning system, and the backend for our billing and customer management platforms.

Key Responsibilities

• Design, develop, and maintain the core backend services in Python.
• Build the PCEF, integrating with SigScale OCS via REST API and controlling the network firewall (nftables).
• Develop the provisioning system to automate subscriber activation and management.
• Build the backend for the BSS, including the billing engine and payment gateway integrations.
• Design and manage the database schema (PostgreSQL).
• Write clean, high-quality, and well-tested code.

Required Qualifications

• 5+ years of professional backend development experience with Python.
• Strong understanding of system design, data structures, and algorithms.
• Experience with relational databases (PostgreSQL preferred).
• Experience building and consuming REST APIs.
• Comfortable working in a Linux environment.

Preferred Qualifications

• Experience with networking libraries and protocols.
• Experience with telecom systems or high-throughput, low-latency applications.
• Experience with asynchronous programming in Python (asyncio).