Senior Backend Engineer, Horizon3
Developer Tools & Automation
$165-235k
+ Potential for performance bonuses and equity options
More information about location
Autonomous security solutions
Job no longer available
Autonomous security solutions
201-500 employees
Job no longer available
$165-235k
+ Potential for performance bonuses and equity options
More information about location
201-500 employees
Company mission
To help find and fix attack vectors before attackers can exploit them.
Role
Who you are
- We are seeking a highly skilled Senior Software Engineer specializing in Developer Tools & Automation with deep expertise in testing, infrastructure, and system analysis
- Bachelor’s degree in Computer Science, Engineering, or related field (or equivalent professional experience)
- 6+ years of experience in software development, test automation, DevTools engineering, or SDET leadership roles
- Expert-level proficiency in Python and/or JavaScript/TypeScript, with proven experience building frameworks and automation tooling
- Strong expertise in distributed systems debugging, log analysis, and observability using tools like CloudWatch, Datadog, or equivalent
- Proven experience with GraphQL APIs, Neo4j, Kubernetes, and microservices architectures
- Deep familiarity with AWS services (EC2, S3, Lambda, RDS, DynamoDB, IAM, CloudWatch) and IaC practices
- Hands-on experience with CI/CD automation (e.g., GitLab CI) and automated UI/API testing frameworks (e.g., Playwright)
- Strong understanding of QA methodologies, test strategy, and risk-based testing in distributed environments
- Exceptional communication skills with the ability to influence cross-functional stakeholders and advocate for quality at scale
Desirable
- Demonstrated ability to take projects from concept through design, implementation, and adoption
- Experience with multi-cloud deployments (AWS, Azure) and event-driven architectures
- Strong background in containerized environments (Docker, Kubernetes)
- Familiarity with agile delivery practices and leading cross-team initiatives
- AWS Certifications (Developer or Solutions Architect) are highly valued
What the job involves
- In this role, you will own the strategy and implementation of automation frameworks, infrastructure deployment pipelines, and observability tooling that drive the reliability, scalability, and quality of our services
- You will design and maintain automated controls, test exercisers, log analysis systems, and results tracking frameworks—partnering closely with Engineering, DevOps, and Support to raise the bar for quality and velocity in a fast-paced, agile environment
- Build and maintain Infrastructure-as-Code (IaC) solutions (Terraform, CloudFormation, VMware) to provision complex target environments for testing and development
- Design and lead development of log analysis platforms capable of ingesting and normalizing multi-format data streams (AWS, S3, Azure, OS, networking, Docker, Kubernetes, etc.) with user-facing visualization and reporting
- Own and evolve GraphQL APIs and databases (e.g., Neo4j) used for operational control, automation, and system health tracking
- Architect and implement test exerciser frameworks to validate functionality, performance, and resiliency across distributed services
- Develop results-tracking and observability frameworks with UI and reporting layers to provide real-time visibility into system health and test outcomes
- Drive collaboration across engineering, QA, and product management to define testing strategies, requirements, and automation standards
- Integrate testing frameworks and tooling into CI/CD pipelines (GitLab CI) to enable rapid, reliable delivery
- Contribute to architecture and design discussions, ensuring reliability and testability are first-class considerations
- Provide technical mentorship and leadership in automation, observability, and testing practices
Our take
In an era marked by escalating cyber threats and data breaches, safeguarding digital assets has become a high priority across all industries. Amid this landscape, Horizon3.ai stands out as an autonomous security solution by addressing the critical need for robust cybersecurity.
At the heart of Horizon3.ai's mission is NodeZero™, a platform designed to elevate proactive security measures. Using this, customers can verify their security posture and identify potential vulnerabilities through self-service. This proactive approach to cybersecurity effectively thwarts potential exploits and ensures the integrity of their digital infrastructure.
With 2025 funding in hand, the company is poised to further its ambition to develop into an industry-leading cybersecurity company. The infusion of funds will be channelled towards expanding its partner network, refining its offerings and entering the US government market. Horizon3 aims to establish itself as a pivotal player in the evolving autonomous security landscape, a highly lucrative market valued at $80 billion.
Kirsty
Company Specialist at Welcome to the Jungle
Insights
-8% employee growth in 12 months
Company
Funding (last 2 of 6 rounds)
Jun 2025
$100m
SERIES D
Aug 2023
$40m
SERIES C
Total funding: $187m
Company benefits
- Growth Opportunities: Be part of a dynamic and growing team with numerous career advancement opportunities
- Innovation-Driven Culture: Work in a collaborative environment that encourages creativity and out-of-the-box thinking
- Flexible Work Environment: Enjoy the convenience and work-life balance that comes with remote work
- Inclusive and Diverse Team: We value diversity and promote an inclusive culture where everyone can thrive
Company HQ
SoMa, San Francisco, CA
Leadership
Snehal Antani
(Co-Founder & CEO)Graduated from the Rensselaer Polytechnic Institute with an MS in Computer Science. Previously worked at IBM as a Lead Architect, at GE Capital as the CIO of Distribution Finance and Splunk as the SVP & GM of Business Analytics & IoT.
Anthony Pillitiere
(Co-Founder)Graduated from the University of Maryland with a Bachelor's Degree in Computer Systems Networking and Telecommunications. Previously worked at the United States Air Force in multiple roles, including Deputy Chief Technology Officer.
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