Staff Technical Support Engineer (Web App)

Horizon3

6d•$117,000 - $145,000•Remote

About The Position

Horizon3 is a fast-growing, remote cybersecurity company dedicated to the mission of enabling organizations to proactively find and fix and verify exploitable attack vectors before criminals exploit them. Our flagship product, the NodeZeroTM platform, delivers production-safe autonomous pentests and other key assessment operations that scale across the largest internal, external, cloud, and hybrid cloud environments. NodeZero has been adopted by organizations of all sizes, from small educational institutions to government agencies and Global 100 enterprises. It is used by ITOps/SecOps teams, consulting pentesters, and MSSPs and MSPs. We are a fusion of former U.S. Special Operations cyber operators, startup engineers, and formerly frustrated cybersecurity practitioners. We're committed to helping solve our common security problems: ineffective security tools, false positives resulting in alert fatigue, blind spots, "checkbox” security culture, cybersecurity skills shortage, and the long lead time and expense of hiring outside consultants. Collectively, we are a team of learn it alls, committed to a culture of respect, collaboration, ownership, and results.

Requirements

Bachelor's degree in Computer Science, Information Technology, Engineering, or a related field (or equivalent professional experience).
8+ years of relevant industry experience in technical support, systems administration, or cloud operations, with demonstrated tenure supporting large-scale, mission-critical deployments for enterprise B2B customers.
Demonstrated experience leading support incident response in high-availability environments.
Deep experience with: Modern web application architectures, including SPAs, server-rendered apps, APIs, and microservice-backed platforms, with the ability to troubleshoot real browser, client-side, and authentication/authorization behavior in production.
Docker and containerization technologies, including designing, deploying , and operating containerized workloads at scale in Kubernetes or equivalent orchestration platforms, with understanding of cluster health and rollout strategies. (OR CKA/CKAD)
Linux administration, including advanced performance tuning and security hardening.
Networking fundamentals, including TCP/IP, BGP, firewalls, VPNs, load balancers, and advanced network troubleshooting using tools such as Wireshark and tcpdump in production environments.
Strong practical background in web application security, including common exploit classes, pentesting or AppSec-style testing, WAF and anti-bot constraints, and production-safe investigation of complex access and multi-role workflows.
Cloud platforms (AWS, Azure, or GCP) and Infrastructure as Code tools such as Terraform, Ansible, or CloudFormation.
Hands-on expertise with queries and troubleshooting in observability platforms such as Datadog, including building dashboards.
Scripting and automation skills in Bash & Python, with a history of building reusable tooling and workflow automations, with relevant examples.
Demonstrated self-direction and continuous learning, evidenced by certifications (e.g., AWS Solutions Architect Professional, CKA, RHCE, or equivalent), technical writing, open-source contributions, or leadership of internal technical initiatives.
Proven experience operating in complex enterprise environments, including multi-tenant architecture with knowledge of industry or government compliance requirements.
Solid understanding of database concepts across relational, NoSQL, and Graph based systems, including query development and general administration in production contexts.

Nice To Haves

Substantial background in cybersecurity, including hands-on experience with threat detection and response, pentesting, vulnerability management programs, encryption standards, and compliance frameworks such as SOC 2, FedRAMP, or GDPR.
Full-stack development proficiency in Python, JavaScript, or Go, with a portfolio of custom internal tooling, support automation platforms, or customer-facing integrations built to production standards.

Responsibilities

Serve as the ultimate escalation point for enterprise customers, leading resolution of the most critical and ambiguous technical issues across cloud, networking, and infrastructure domains.
Drive root cause analysis on systemic and recurring problems, partnering with engineering and product teams to influence upstream fixes and long-term reliability improvements.
Lead cross-functional initiatives with engineering, product, and sales teams to resolve complex technical challenges, while establishing documentation standards and knowledge frameworks that scale across the team.
Own the design and review of customer environment architectures, providing authoritative guidance on best practices for infrastructure as code, containerized applications, and cloud-native patterns.
Define and refine support processes, SLA frameworks, and escalation paths, contributing directly to operational excellence and continuous improvement at the team level.
Mentor and technically develop senior and junior team members alike, driving a culture of engineering rigor, knowledge sharing, and technical growth across the support organization.
Identify emerging technology trends and proactively introduce capabilities, tooling, and practices that elevate the team's support effectiveness and customer outcomes.