TextNow, Inc.

TextNow, Inc.

Tech Lead, Mobile Core Network Engineering

Open- Canada · Senior

Sponsorship not specifiedCAD 160k-CAD 207kDetected 88 days ago
Distributed SystemsAWSPrometheusGrafanaDatadogSite Reliability EngineeringIncident ResponseVendor ManagementDNS5G/LTEVoIPNetwork EngineeringLeadershipCommunicationMentoring

About the role

  • This role is the critical bridge between our vendor's Managed Services team and our internal engineering, product, and operations teams.
  • You'll be the technical owner of the mobile core, combining deep technical expertise with strong coordination skills.

Responsibilities

  • 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.
  • 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.
  • As a full MVNO operating our own mobile core network over LTE and 5G NSA, we have the unique advantage of controlling our network infrastructure end-to-end.
  • We operate the HSS, PGW, and other critical network functions, giving us the flexibility to innovate and deliver exceptional service to millions of users.
  • You won't just manage vendor deliverables-you'll dive into the technical details, challenge approaches when needed, and ensure our core network evolves to meet the demands of a growing subscriber base.
  • Drive capacity planning and platform evolution to support growing scale.
  • Evaluate new technologies and drive initiatives to reduce operational burden and increase automation.

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.
  • You can reason about packet flows across distributed systems and debug from the wire up.
  • You know how to review their work, hold them accountable, and coordinate across vendor, operations, and product teams without micromanaging.
  • You enjoy technical leadership and want to grow into leading a team.
  • 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.
  • Experience with mobile core network operations (LTE/5G EPC/NSA)-hands-on experience with HSS, PGW/SGW, PCRF, or similar network functions
  • Experience at an MVNO or with carrier/MVNO-specific network challenges
  • Familiarity with IMS or VoLTE deployments, SIP, SMPP, SMTP

Skills

  • Final hiring decisions are ultimately made by humans.
  • Our cloud-hosted core runs in AWS, with our mobile core vendor providing managed services for day-to-day operations.

Compensation

  • 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 Health, dental, and vis

Benefits

  • About the Role We are looking for a hands-on Tech Lead, Mobile Core Network Engineering to own the health and evolution of our 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).
  • Design and deliver AI tooling to improve operational health, including agentic performance analysis, automated diagnostics, and accelerated root cause analysis.
  • Develop and improve monitoring, alerting, and operational tooling for core network health.
  • You're motivated to learn new technical domains and apply that learning quickly.

Equal opportunity

  • We are an equal opportunity employer and are committed to creating an inclusive environment for all employees.
  • We consider all qualified applicants without regard to race, color, religion, sex, gender identity or expression, sexual orientation, age, disability, or any other protected characteristic.
  • Applicants who require reasonable accommodation during the hiring process may contact our Talent Team.
  • AI usage: We use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses.
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