TextNow - Tech Lead, Mobile Core Network Engineering
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Requirements
• Experienced in SRE or Infrastructure Leadership: 7+ years in SRE, infrastructure engineering, or network engineering, with a track record of operating complex, high-availability platforms at scale. • Strong Networking Fundamentals: Deep understanding of IP networking, routing, tunneling protocols, DNS, DPI. You can reason about packet flows across distributed systems and debug from the wire up. • Vendor Management Experience: You've managed vendor or managed-service relationships for critical infrastructure. You know how to review their work, hold them accountable, and coordinate across vendor, operations, and product teams without micromanaging. • AI-First Mindset: You actively use AI tools to accelerate incident triage, anomaly detection, and root cause analysis, and continuously evolve how you apply them to raise the bar on operational excellence. • Technical Leadership & Ownership: You've provided technical direction and mentorship to other engineers, see problems before they're escalated, and drive them to resolution. You enjoy technical leadership and want to grow into leading a team. • Incident Management & Observability: Comfortable handling production incidents, analyzing root causes, and implementing long-term fixes. Hands-on experience with observability platforms like Datadog, Prometheus, Grafana, or the ELK stack. • AWS Infrastructure: Experience with AWS (EC2, EKS, VPC networking) or equivalent cloud platform. • Comfortable Operating in Ambiguity: You don't need to have all the answers on day one, but you know how to find them. You're motivated to learn new technical domains and apply that learning quickly. • Experience with mobile core network operations (LTE/5G EPC/NSA)—hands-on experience with HSS, PGW/SGW, PCRF, or similar network functions • 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
Responsibilities
• 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). Drive capacity planning and platform evolution to support growing scale. • Manage Vendor Relationships: Serve as the primary technical interface with our mobile core vendor's Managed Services team and TextNow's broader carrier partners. Review vendor-proposed changes and architectural decisions, catch errors before production, and hold partners accountable to SLAs. Oversee vendor software upgrade cycles, coordinate upgrade windows, and ensure smooth rollouts. • Build AI-Driven Operational Capabilities: Design and deliver AI tooling to improve operational health, including agentic performance analysis, automated diagnostics, and accelerated root cause analysis. Continuously evolve how the team uses AI to raise the bar on operational excellence. • Technical Leadership & Mentorship: Provide technical direction and mentorship across the Telecom Engineering pod, growing into people leadership as the team scales. • Incident Response & On-Call Support: Participate in an on-call rotation, troubleshoot issues, and drive incident resolution to minimize downtime. Conduct post-mortems and implement corrective actions to enhance reliability. • Cross-Functional Coordination: Partner with product, engineering, and other pods to prioritize and sequence network asks. Translate internal requirements into actionable work for the team and vendors. • Platform Evolution: Contribute to the long-term technical roadmap for the core network. Develop and improve monitoring, alerting, and operational tooling for core network health. Evaluate new technologies and drive initiatives to reduce operational burden and increase automation.
Benefits
• Rare opportunity to own a mobile core network at a full MVNO—not just configure someone else’s • High-impact role: your work directly affects millions of users’ connectivity • Small, senior team where your decisions and leadership shape the platform’s direction • Remote-friendly culture with a collaborative, low-ego engineering organization • Competitive compensation, equity, and comprehensive benefits • $160,000 - $207,000 a year • Canada (CAD) Salary Range: $160,000 - $207,000 • US – National (USD): $148,000 -$259,000 • US High-Cost Locations (USD) - NYC, CT, NJ, Seattle, Los Angeles, San Diego: $136,300 - $237,600 • US San Francisco Bay Area (USD): $148,700 -$259,200 • This role does not require or confer professional engineer status. • Our total rewards package goes beyond base salary. We offer a comprehensive benefits program, an annual performance-based bonus, and equity opportunities that ensure you share in the success you help create. • We know that exceptional talent doesn’t always fit neatly into a range, so if you’re passionate about our mission and think you can make a difference, we encourage you to apply, even if your compensation expectations are outside the listed range. Final compensation will be determined based on a variety of factors, including your skills, experience, and location. • Our goal is to offer a competitive package that reflects the impact and expertise you bring to the team. Let's chat! • This is a brief overview of the benefits that TextNow offers its employees. More complete details can be found in TextNow’s Benefit Guide and legal plan documents, which are available to employees on or shortly after their start date with TextNow. The benefits listed herein are for illustrative purposes only and may change from time-to-time in TextNow’s sole discretion. • Free phone service • Strong work life blend • Flexible work arrangements (work-from-home, remote, or access to one of our office spaces) • Employee stock options • Unlimited vacation • 12 paid holidays per year • Competitive pay • 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 • We travel a few times a year for various team events, company-wide off-sites, and more • More information about our total rewards package will be available during the hiring process. • Dogfooding & Customer Obsession • At TextNow, every employee gets to actively use our app for calling and texting. Dogfooding helps us experience what customers do, to spot issues early, and drive better design, developer, and user experiences. • Diversity and Inclusion • Our aim is to make every person who joins TextNow feel like they belong, that they’re valued, and that they’re able to be their authentic selves at work. • We’re all accountable for creating an inclusive culture and a sense of belonging for one another. By doing this together, we’ll make TextNow better for everyone. • Equal opportunity
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