Senior Software Engineer

Summary

Join Telnyx, an industry-leading company building the future of global connectivity, as a Senior Software Engineer in our Mobile Core team. You will contribute to the development, optimization, and maintenance of our mobile core software systems. This role requires expertise in IP networking, proficiency in C++ and Golang, and a strong problem-solving mindset. Familiarity with 3GPP protocols and Elixir is advantageous. The opportunity involves working on the design, development, and maintenance of mobile network infrastructure elements and associated applications. You will collaborate with cross-functional teams to deliver high-quality solutions and improve engineering standards.

Requirements

• Strong programming experience in C++, C and Golang
• Solid understanding of IP networking, including protocols such as TCP/IP, UDP, DNS, and BGP
• Familiarity with mobile core architectures and protocols (e.g., LTE/4G EPC, 5G Core, Diameter, GTP etc.) and network components like MME, SGW, PGW, and UPF
• Hands-on experience with distributed systems and multi-threaded applications
• Knowledge of DevOps practices, including containerisation (Docker, Kubernetes) and CI/CD pipelines
• Proficiency in SQL
• Willingness to learn and apply new knowledge to solve problems
• Multiple years of diverse professional software engineering experience with more than one programming language or platform. E.g. Go, Erlang, Elixir etc
• Passion for robustness and correctness. Practical skills in automated testing
• Understanding of relational databases, SQL
• Knowledge of mobile wireless systems and protocols
• Strong Innate sense of curiosity and ownership

Responsibilities

• Design, develop, and maintain scalable and reliable software for mobile core network functionalities (e.g., EPC, 5G Core, etc.)
• Leverage a deep understanding of IP networking to troubleshoot, design, and optimise communication between components of the mobile core
• Enhance system performance by profiling, debugging, and refactoring code in C++ and Golang
• Work closely with cross-functional teams to deliver high-quality solutions on time
• Improve engineering standards, tooling, and processes
• Contribute to and maintain APIs across Telnyx’s Wireless stack
• Debug production issues across services and multiple levels of the stack
• Work with engineers across the company to build new features
• Improve engineering standards, tooling, and processes
• Create and maintain technical documentation, including design specifications, system diagrams, and API documentation

Preferred Qualifications

• Experience with Elixir and functional programming concepts is a significant advantage
• Familiarity with message queues like RabbitMQ and Kafka
• Familiarity with more exotic databases/key-value stores such as ETS
• Familiarity with Docker, Kubernetes, Consul, Jenkins, Prometheus
• Basics of web front-end
• Experience with IoT platforms
• Experience in the design and implementation of commercial IoT/M2M solutions
• Familiarity with Postgres is an advantage