Core Software Engineer

Ready to make connectivity from space universally accessible, secure and actionable? Then you’ve come to the right place!

E-Space is bridging Earth and space to enable hyper-scaled deployments of Internet of Things (IoT) solutions and services. We are building a highly-advanced low Earth orbit (LEO) space system that will fundamentally change the design, economics, manufacturing and service delivery associated with traditional satellite and terrestrial IoT systems.

We’re intentional, we’re unapologetically curious and we’re 100% committed to innovate space-based communications and deliver actionable intelligence that will expand global economies, protect space and our planet and enhance our overall quality of life.

We are looking for a 5G Core System Engineering Lead to own end-to-end system design and interface definition for E-Space's satellite 5G Core network. This role sits at the architecture level: you will decompose requirements across the full core service chain, define interfaces and information flows at every boundary, and drive the trade-offs that are unique to a satellite operator — session continuity across dynamic links, SIM management, OSS/BSS, charging and policy, and subscription management for a globally mobile user base. You will translate those trade-offs into concrete architectural decisions and drive them to closure across software, platform, and back-end engineering teams.

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

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

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

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

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