Senior Frontend UI Software Engineer

About the Opportunity

We are partnering with a highly funded, rapidly growing cybersecurity venture based in San Jose, California. This is a full-time, 5 days/week onsite role where you will play a critical part in shaping the user experience of a high-performance enterprise platform. 

Why This Role Matters

As a Senior UI Engineer, you will translate sophisticated backend architecture and intricate logic into elegant, high-performance web applications. Your work directly dictates how users interact with our ecosystem—turning technical capability into intuitive, lightning-fast, and trustworthy digital experiences. In this role, your commitment to pixel-perfect execution and front-end performance will directly influence market adoption and customer success.

Core Responsibilities

• Application Development: Architect, build, and optimize scalable, component-driven front-end applications utilizing modern React and TypeScript.

• Responsive Architecture: Deliver seamless, highly responsive layouts tailored perfectly for diverse form factors, ranging from mobile displays to massive enterprise monitors.

• Design System Collaboration: Partner closely with UI/UX designers to convert high-fidelity wireframes into modular, reusable components and maintain a robust design language.

• API Integration: Connect front-end interfaces with GraphQL APIs, focusing heavily on efficient state management, data caching, and rendering performance.

• Cross-Functional Delivery: Coordinate with backend engineering and DevOps teams to streamline CI/CD pipelines, automated testing, and secure production deployments.

• Technical Leadership: Drive engineering excellence through constructive code reviews, comprehensive technical documentation, and mentoring team members on front-end best practices.

Qualifications & Expertise

• Professional Experience: 5+ years of dedicated front-end/UI engineering experience in a commercial environment (7+ years highly preferred).

• Core Stack: Advanced proficiency with React and TypeScript, backed by a deep understanding of modern JavaScript (ES6+), semantic HTML5, and advanced CSS3.

• Data & State Management: Practical experience managing complex application state using tools like Apollo Client, Redux, or similar frameworks.

• Performance Optimization: Proven track record of debugging complex client-side issues and optimizing web applications for maximum speed and rendering efficiency.

• Modern Workflow: Habitual use of Git version control, continuous integration/continuous deployment (CI/CD) pipelines, and agile development methodologies.

Preferred Technical Assets (Bonus)

• A strong design sensibility with hands-on experience utilizing Figma or similar design tools.

• Hands-on experience with cybersecurity is a huge advantage.

• Golang/Go experience is a plus.

• Direct exposure to cloud infrastructure architectures (AWS, Azure, or Google Cloud Platform).

• Deep technical expertise in GraphQL schema design and query optimization.