Core Software Engineer

We are seeking an experienced Software Engineer with background in 5G Core Network development to join our team. This role focuses on architecting, developing, and maintaining critical network functions and control-plane services that form the backbone of next-generation mobile telecommunications infrastructure. You will apply your expertise in 3GPP protocols, distributed systems, and service-oriented architecture to advance our 5G Core processing solutions while contributing to mission-critical telecommunication systems. This position offers the opportunity to work on high-impact projects that directly support advanced network capabilities and develop innovative solutions that drive the evolution of satellite networks. 

What you will do:

• Design, develop, and maintain 5G Core Network Functions and their associated service-based interfaces (Namf, Nsmf, Nupf, etc.) using modern C++, Python, or equivalent languages on Linux-based systems 

• Develop and implement 3GPP protocols including NAS, PFCP, GTP-U, HTTP/2, and network interfaces such as N4 and N11 to ensure standards compliance and interoperability 

• Build and enhance service-based microservices architecture with REST-like APIs, leveraging distributed systems design patterns and modern deployment practices 

• Troubleshoot complex distributed systems issues, analyze control-plane signaling paths, and debug protocol interactions across the 5G core infrastructure 

• Develop and maintain 5G core network control-plane probes for real-time monitoring, protocol decoding, signaling extraction, and network traffic analysis 

• Design and implement automated test frameworks for functional, integration, and regression testing of 5G Core features with comprehensive results tracking and validation 

• Collaborate with technical leaders and cross-functional teams to elicit requirements, develop technical documentation, and lead concept demonstrations 

• Perform technical research, develop performance analysis tools, and optimize network configurations to improve system KPIs and operational efficiency 

• Support products through the full release cycle including testing, validation, and deployment  

What you bring to this role:

• Bachelor's degree in a STEM discipline (Computer Science, Computer Engineering, Electrical Engineering, or related field) 

• Minimum 8 years of professional software development experience in telecommunications or networking domains 

• 5+ years of hands-on development experience with 5G Core Network Functions or equivalent LTE/4G EPC (MME, SGW, PGW, HSS) systems 

• Proficiency in C++, Python, or equivalent modern programming languages with demonstrated ability to architect and implement complex telecommunications processing solutions 

• Deep knowledge of 3GPP specifications and RAN/5G-NR/LTE protocols with hands-on experience resolving protocol-layer issues 

• Strong understanding of distributed systems, microservices architecture, and control-plane signaling patterns 

• Experience with automated testing frameworks, CI/CD pipelines, and test case development with comprehensive tracking methodologies 

• Proven debugging and performance optimization skills with exceptional analytical capabilities and strong engineering fundamentals 

• Experience troubleshooting and analyzing logs from network elements using specialized tools 

Bonus points for the following:

• 5G Core network control-plane probe development for advanced monitoring, traffic replay, and protocol analysis 

• In-depth knowledge of specific 5G network functions: AMF, SMF, UPF, UDM, PCF, AUSF, NRF including behavior, interactions, and call flows 

• Observability frameworks and tools (OpenTelemetry, Prometheus, Grafana) for monitoring distributed telecommunications systems 

• Network virtualization and containerization technologies (KVM, VMware, OpenStack, AWS, Kubernetes, Helm, Docker) 

• Reverse engineering of telecommunications protocols and proprietary network implementations 

• User Equipment (UE) and network element log analysis using specialized tools (QXDM, XCAL, or equivalent) 

• Development with modern languages like Go or Rust for systems programming 

• Experience with LTE/4G EPC systems (MME, SGW, PGW, HSS) demonstrating protocol evolution knowledge 

• Building software tools and data pipelines for network performance analysis and optimization 

Additional Requirements

This is a fast-paced, high-impact environment - flexibility to occasionally work extended hours or weekends during critical periods is expected.