About this role.
Tailscale is seeking a Senior Customer Support Engineer (Tier 3) to join their Customer Escalations team. You will own the most complex and ambiguous technical escalations, performing deep-dive investigations and reproducing difficult bugs. You will work closely with Support and Engineering to bridge the gap between customer reports and actionable fixes. The role requires strong networking knowledge (TCP/IP, VPNs, WireGuard), programming in Go/Python, and excellent communication skills for high-pressure customer calls. This is a fully remote, senior-level position with a focus on solving critical issues and improving product quality.
Role DNA
A quick view of the complexity, pace, ownership and collaboration implied by the job description.
Job Complexity
4/5Pace & Pressure
4/5Autonomy Level
5/5Communication Load
5/5Salary analysis
Estimated compensation compared with the broader UK market for similar roles.
Core skills
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Cover letter sample
Dear Hiring Manager,
I am writing to express my strong interest in the Senior Customer Support Engineer (Tier 3) position at Tailscale. With over 4 years of experience handling complex technical escalations at a SaaS company, I am adept at deep-dive troubleshooting and cross-functional collaboration. My hands-on networking knowledge and proficiency in Go and Python enable me to build reproducible test cases and communicate clearly with both customers and engineering teams.
I am particularly excited about the opportunity to contribute to Tailscale's mission of building a secure, easy-to-use network. My ability to stay calm under pressure and drive high-severity issues to resolution makes me a strong fit for this role. Thank you for your consideration.
Sample interview questions
In my previous role, I handled a critical outage for a major client where a misconfigured firewall caused connectivity loss. I led the bridge call, coordinated with network engineers, and provided regular updates to the customer. I isolated the issue, documented the root cause, and implemented a temporary fix within 4 hours, followed by a permanent solution. The client appreciated the transparency and we improved our monitoring to prevent recurrence.
I would start by gathering logs from both client and server, focusing on WireGuard handshake timestamps. I would check for NAT/firewall interference, analyze packet captures for retransmissions, and verify UDP hole punching with STUN. I would also examine CPU and network interface metrics for drops. If I find a pattern, I would reproduce the issue in a lab environment and create a bug report with evidence.
A good bug report includes a reproducible case, log snippets with timestamps, environment details (OS, version, topology), impact scope, and what has been ruled out. For example, I once filed a report on a DNS leak in macOS where the system resolver ignored the custom DNS. I included steps to reproduce, packet traces showing the leak, and a proposed fix referencing the relevant engine room.
I have used Go to write small tools for parsing logs and automating reproduction of issues. For example, I wrote a script that simulated concurrent VPN connections to reproduce a race condition in the handshake process. I also read Go source code to understand goroutine behavior and used pprof to identify memory leaks.
I first acknowledge their frustration and assure them we are treating it as a priority. I set clear expectations on timelines and communication intervals. I listen actively, ask clarifying questions, and explain technical findings in simple terms. By showing empathy and progress, I build trust even when the issue is unresolved.
About Tailscale
Tailscale is building the new Internet by delivering software that makes it easy to securely interconnect people and their devices, no matter where they are. From hobbyists to multinational corporations, teams of every size use Tailscale each day to protect their networks, share access to internal tools, and more. We’re building a future for the Internet that’s easy, sensible, and safe, like it used to be. Founded in 2019 and fully distributed, we’re backed by Accel, CRV, Insight, Heavybit, and Uncork Capital.
Job Description
If you’re passionate about solving complex technical problems and helping build trust between customers and engineering, this is the role for you. We’re seeking a motivated Senior Customer Support Engineer (Tier 3), Customer Escalations to join our Escalation Engineering team. You’ll take ownership of our most complex, ambiguous customer escalations, solving issues where the root cause is not always obvious. You will work these issues to resolution or alternatively a fully-documented handoff that engineering can act on without delay.
As a Senior Customer Support Engineer (Tier 3), Customer Escalations, you’ll partner closely with Support and Product/Engineering to close the gap between “customer has described a problem” and “engineering has what it needs to fix it.” This role reports directly to the Customer Escalations Team Lead.
Key Responsibilities
- Own high-severity, post-sales technical escalations from intake through resolution or engineering handoff. This includes deep-dive investigations and reproduction of difficult-to-isolate bugs.
- Get on calls with customers, pull logs, and communicate with the customer about leading theories
- Build engineering handoff packages that require minimal follow-up questions: reproducible case, log evidence (timestamps, node IDs), version matrix, impact scope, what’s already been ruled out, and a proposed engineering team to own the fix.
- File and track issues for confirmed bugs, keeping the ticket/issue link intact so engineering retains full customer context.
- Monitor for patterns across escalations to catch recurring or systemic issues early; translate what you learn into product improvements, tooling, and runbooks that raise the technical bar for the whole Support org.
- Partner with Support, CSE, and Product/Eng, while staying within this team’s scope
What We Are Looking For
- 4+ years in a technical support or escalation role at a SaaS or infrastructure company, with demonstrated ownership of escalated/enterprise-tier accounts.
- A genuine problem-solver who gets energy from untangling hard, ambiguous technical issues
- Comfortable owning a live, high-stakes customer call: staying calm, building trust, and communicating clearly with a frustrated or technical customer under pressure.
- Hands-on networking experience in production or homelab environments: TCP/IP, routing, DNS, firewalls, NAT, VPNs, load balancers.
- Deep familiarity with overlay networking concepts — WireGuard, UDP hole punching, STUN — and comparable VPN/networking products.
- Code-level debugging capability: can read Go source, reason about goroutines/locks/channels, read pprof CPU/heap profiles, and understand network interface semantics.
- Comfortable with infrastructure concepts: cloud IaaS, CI/CD pipelines, containerized applications, and Kubernetes debugging.
- Strong systems administration skills as well as troubleshooting across Linux, macOS, and Windows.
- Track record of independently building reproducible test cases and clear, evidence-backed bug reports engineering can act on directly.
- Strong technical storytelling: able to distill highly technical, ambiguous issues into clear narratives for both engineers and non-technical stakeholders.
- Investigative mindset; curious to analyze root cause, and evaluate all options to get customers to the best solution
- Proficiency with programming/scripting in Go, Python, JSON
- Experience with packet-level analysis
As a company, we strive to maintain fair and equitable compensation practices within our team across all roles and all levels. Tailscale’s compensation package includes base salary, equity, and comprehensive benefits. The salary range displayed on each job posting represents the target range for a new hire’s base salary. Individual offers may vary based on experience and skill set.
Frequently cited statistics show that people who identify with historically marginalized groups are likely to apply to jobs only if they meet 100% of the qualifications. We encourage you to help us break that statistic!
What We Offer
- An inclusive, flexible environment where you can be your authentic self. We recognize the impact of diverse voices and backgrounds on the growth of our people, product, and company. And that flexibility in how and when you work empowers our team to integrate work and life.
- A competitive total compensation package. This includes a base salary, an equity incentive plan and variable commission (for quota-based roles).
- Comprehensive group benefits with no waiting period. Take advantage of coverage for health, vision, dental, and more for you and your family!
- Remote first company—most of our teams work fully remotely. Enjoy a change of scenery wherever you can get wifi, participate in virtual and in-person social events, and leverage our corporate co-working program to visit WeWork (or other similar spaces near you). Some roles require in-office collaboration depending on team needs, which will be clearly noted in the job description.
- Employer-funded retirement contributions. Tailscale will match your retirement contributions dollar-for-dollar, up to a maximum annual employer contribution equal to 0.75% of your eligible compensation.
- Connect with other Tailscalars IRL. Attend our annual company retreat, participate in team off-sites, and collaborate in person with teammates across Canada, the United States, the United Kingdom, and Singapore. We support intentional in-person connection through team travel and distributed collaboration.
- Support for your personal and professional development. Grow your career thoughtfully with $1500 USD annually for professional development, or take advantage of mentorship, coaching, and internal promotion opportunities.
- Paid time off and a healthy work-life integration. Our flexible, paid time off program supports you for any situation life throws your way, whether moving homes or travelling the world!
- A build-your-own home office setup. You choose your own company-owned laptop (Mac or PC), receive a monthly home internet reimbursement, and $500 USD to customize your workstation to make it your own.
- Paid parental leave program. We care about your life outside of work and encourage new parents to take advantage of parental leave top-ups (20 weeks for birthing parents, 16 weeks for non-birthing parents).
Tailscale is committed to providing an accessible and inclusive hiring process. If you require an accommodation at any stage of the recruitment process or related to any aspect of this role, please contact your recruiter.
Our hiring process uses AI-assisted tools to help screen and assess candidates. All hiring decisions are made by people.
Please be aware that legitimate emails from Tailscale’s talent team will only originate from @tailscale.com, @greenhouse.io, and @interviews.modernloop.io email addresses. For more information about protecting yourself from impersonators and scams, please visit https://tailscale.com/scam-awareness.
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