Sr. UI Engineer

Company: Stellar Cyber Inc.
Location: San Jose
Posted on: May 20, 2025

Job Description:

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.
  • 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.
    • 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 ProgramWhy Join Us
      • Work at the forefront of cybersecurity innovation within a dynamic, fast-growing team.
      • Competitive salary, comprehensive benefits, and ample career growth opportunities.
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Keywords: Stellar Cyber Inc., Castro Valley , Sr. UI Engineer, Engineering , San Jose, California