TextNow, Inc.

Role Description We are looking for a hands-on Tech Lead, Mobile Core Network Engineering to own the health and evolution of our mobile core platform. Our cloud-hosted core runs in AWS, with our mobile core vendor providing managed services for day-to-day operations. This role is the critical bridge between our vendor’s Managed Services team and our internal engineering, product, and operations teams. - Own the Mobile Core Platform: Take end-to-end accountability for the health, performance, and evolution of TextNow's mobile core (HSS, PGW, PCRF, and related functions running in AWS). - Manage Vendor Relationships: Serve as the primary technical interface with our mobile core vendor's Managed Services team and TextNow's broader carrier partners. - Build AI-Driven Operational Capabilities: Design and deliver AI tooling to improve operational health. - Technical Leadership & Mentorship: Provide technical direction and mentorship across the Telecom Engineering pod. - Incident Response & On-Call Support: Participate in an on-call rotation, troubleshoot issues, and drive incident resolution. - Cross-Functional Coordination: Partner with product, engineering, and other pods to prioritize and sequence network asks. - Platform Evolution: Contribute to the long-term technical roadmap for the core network. Qualifications - 7+ years in SRE, infrastructure engineering, or network engineering. - Deep understanding of IP networking, routing, tunneling protocols, DNS, DPI. - Experience managing vendor or managed-service relationships for critical infrastructure. - Active use of AI tools to accelerate incident triage, anomaly detection, and root cause analysis. - Experience with observability platforms like Datadog, Prometheus, Grafana, or the ELK stack. - Experience with AWS (EC2, EKS, VPC networking) or equivalent cloud platform. - Comfortable operating in ambiguity and motivated to learn new technical domains. Requirements - Experience with mobile core network operations (LTE/5G EPC/NSA). - Understanding of 3GPP standards, Diameter, GTP, or mobile packet core architecture. - Experience at an MVNO or with carrier/MVNO-specific network challenges. - Familiarity with IMS or VoLTE deployments, SIP, SMPP, SMTP. Benefits - Free phone service. - Strong work-life blend. - Employee stock options. - Unlimited vacation. - 12 paid holidays per year. - Competitive pay. - Health, dental, and vision benefits. - Short-term & long-term disability. - $750 annual wellness benefit or healthcare spending account. - RRSP matching (Canada) | 401(K) (USA). - Parental leave for eligible employees. - Learning & Development opportunities.