Senior UI Engineer

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.