Senior Software Engineer, Pentest Experience

horizon3ai; United States; Remote; USD 200,000 - 235,000; Full time

Benefits offered by this job

Stock options

Health, vision, and dental coverage

Flexible vacation

Parental leave

Job summary

horizon3ai in the United States is seeking a senior software engineer to build product experiences that help customers understand security risks and take action. The role focuses on roughly 80% backend services and APIs with about 20% frontend development, spanning from scoping to rollout.

You will lead cross-functional initiatives, mentor teammates, write tests and docs, and own delivery of scalable, maintainable software in production.

Qualifications

• Six or more years of professional software development experience.
• Experience building and operating production software across layers.
• Ability to drive large features from requirements to delivery with cross-functional teams.
• Strong technical judgment and clear communication.
• Product-minded with ownership and ability to manage multiple workstreams.
• BS in Computer Science, Computer Engineering, or related field, or equivalent practical experience.

Responsibilities

• Deliver capabilities across backend services, APIs, and web apps.
• Lead medium to large projects through design, implementation, release, and improvements.
• Build user-facing features that are clear, performant, and aligned with design requirements.
• Coordinate with product, design, and engineering partners on cross-functional initiatives.
• Identify risks and tradeoffs early; explain decisions to varied audiences.
• Write and review code, tests, and documentation; mentor teammates.

Skills

Backend systems design

API development

Leadership/Project management

Cloud/Production software

Communication

Problem solving

Education

Bachelor's degree in computer science or related

Tools

Git

CI/CD

Job description

Role overview

Build product experiences that help customers understand security risks, decide what to address, and take action. This senior engineering role owns substantial work from early scoping through rollout and iteration, with an approximate focus of 80% backend services and APIs and 20% modern frontend development.

Responsibilities

• Deliver product capabilities across backend services, APIs, and web applications.
• Lead medium to large projects through requirements gathering, technical design, implementation, release, and follow-up improvements.
• Build user-facing features that are clear, maintainable, performant, and consistent with product and design requirements.
• Coordinate with product, design, and engineering partners on cross-functional initiatives.
• Surface delivery risks, blockers, and scope concerns early; explain technical choices and tradeoffs to varied audiences.
• Write and review code, tests, and technical documentation, and support teammates through mentoring and collaborative problem solving.

Requirements

• Six or more years of professional experience (the listing specifies this threshold; its surrounding detail is incomplete).
• Strong experience developing and operating production software across application layers.
• Ability to independently take substantial work from requirements through delivery and coordinate with cross-functional stakeholders.
• Sound technical judgment, pragmatic problem solving in ambiguous situations, and clear written and verbal communication.
• Product-minded approach, ownership of outcomes, and ability to balance multiple workstreams.
• Bachelor’s degree in computer science, computer engineering, or a related discipline, or equivalent practical experience.

Benefits and work setup

• Remote or hybrid arrangements may be available depending on the role and location.
• Full-time roles include eligibility for stock options. Benefits include health, vision, and dental coverage, flexible vacation, and parental leave.
• The listed base salary range is $200,000–$235,000, with the final amount based on location, qualifications, experience, and relevant skills.