xelys jobs xelys jobs

Frontend Engineer (React.js)

Sundayy

leadpermanentfrontendengineering-management United States Today via LinkedIn

See how well this job matches your profile

Sign up to get an AI match score and generate a tailored application in seconds.

Get your match score

Tags

ReactTypeScriptFrontend ArchitectureUI EngineeringState ManagementPerformance OptimizationMentorshipSaaSStartup ExperienceUX Focus

About the role

Role Overview

Principal Frontend Engineer (React.js) to lead and enhance a SaaS frontend platform as the company scales rapidly. You will be the primary UI development expert, shaping the technical direction and ensuring fast delivery of high-quality features.

Responsibilities

  • Own and evolve the frontend architecture and codebase for scalability, performance, and maintainability
  • Develop and ship end-to-end features with a strong focus on quality and UX
  • Collaborate with product managers and designers to turn ideas into intuitive interfaces
  • Establish and promote lightweight development patterns, tooling, and best practices
  • Identify and address technical debt strategically
  • Mentor and lead engineers with hands-on guidance and foster a collaborative culture
  • Help shape engineering culture and processes as the team grows

Qualifications

  • 8+ years building modern web applications
  • Deep expertise in React and TypeScript
  • Strong product instincts with a focus on user experience
  • Proven ability to own frontend systems in early-stage or high-growth startups
  • Ability to make fast decisions and iterate quickly under uncertainty
  • Strong understanding of frontend performance optimization, state management, and architecture tradeoffs
  • Experience working closely with designers and backend engineers in small, dynamic teams
  • Excellent communication skills; able to simplify complex concepts and lead discussions

Nice-to-haves

  • Not explicitly stated beyond the above experience with ownership, small teams, and rapid iteration.

Benefits (high level)

  • Competitive base salary, annual cash bonus, and equity options
  • 401(k) match
  • Company contributions to medical premiums; fully paid dental and vision
  • Unlimited paid time off
  • Occasional travel for team sessions (e.g., Reston, VA or other sites)

About Sundayy

Tidal Cyber (described alongside the posting’s “Sundayy” company field) builds cybersecurity solutions using Threat-Led Defense strategies. Founded in 2022 by MITRE veterans, the company has grown rapidly with Series A funding and focuses on helping security teams identify critical threats, assess coverage, and prioritize defenses. The organization emphasizes high ownership, innovation, and building impactful SaaS experiences.

Scraped 5/15/2026

xelys jobs xelys jobs

Built for remote job seekers. Powered by AI.