Sr. UI Engineer

Join a fast-growing global leader in cybersecurity, trusted by some of the biggest names in the industry. Besides many enterprises and government agencies, nearly 30% of the world’s top MSSPs rely on our platform, and that number is growing every day as more companies recognize the value of next-generation security solutions. We're at the forefront of protecting organizations against sophisticated cyber threats using cutting-edge AI and automation technologies. Our culture is built on diversity, openness, and collaboration, fostering creativity and innovation that drives real impact in the market.

Join Stellar Cyber as a Sr. UI Engineer to drive the development of scalable, high-performance web interfaces that power our Open XDR platform. This is a hands-on engineering role for someone who thrives in a fast-paced startup environment, enjoys solving complex technical challenges, and is passionate about user experience and code excellence. As a senior member of the UI team, you will play a critical role in architecting frontend solutions, mentoring peers, and contributing to the overall UI strategy. You will work closely with cross-functional teams to deliver intuitive, responsive, and secure interfaces that meet the demands of enterprise cybersecurity customers.

Responsibilities:

• Lead the development of modular, high-quality UI components using JavaScript, TypeScript, and Angular.
• Translate product requirements and complex workflows into intuitive, performant user experiences.
• Collaborate with product, UX, and backend teams to define technical specs and architectural direction.
• Establish and enforce frontend coding standards, design patterns, and testing best practices.
• Own the performance optimization of large-scale UIs, proactively resolving rendering, loading, and responsiveness issues.
• Contribute to CI/CD pipelines, UI testing automation, and build/release tooling.
• Provide technical leadership and mentorship to junior developers through code reviews, design sessions, and paired programming.
• Actively participate in sprint planning, architecture reviews, and roadmap discussions.
• Investigate and resolve production issues with a focus on root cause and long-term stability.

Requirements

• Bachelor’s/Master’s degree in Computer Science or a related field.
• 7+ years of professional experience building complex UI applications.
• Expert-level knowledge of JavaScript, TypeScript, and a modern UI framework (Angular preferred).
• Proven experience with large-scale enterprise UIs, reusable design systems, and performance optimization.
• Hands-on experience with unit testing, integration testing, and UI automation tools.
• Familiarity with CI/CD tools, version control, and agile development practices.
• Strong understanding of web security, cross-browser compatibility, and accessibility.
• Excellent communication and collaboration skills across technical and non-technical stakeholders.
• Experience in a cybersecurity or SaaS platform environment is a strong plus.

Benefits

• Pre-IPO Stock Options (equity opportunity)
• Medical, Dental & Vision care
• Life Insurance
• 401(k)
• Employee Assistance Program
• Employee Discount Program
• Paid time off
• Referral Program
• Rewards and Recognition Program

Why Join Us

• Work at the forefront of cybersecurity innovation within a dynamic, fast-growing team.
• Competitive salary, comprehensive benefits, and ample career growth opportunities.