The Staff / Principal Frontend Software Engineer will own the frontend architecture for mission-critical operator experiences, leading technical direction and mentoring engineers to build high ...
The Staff / Principal Frontend Software Engineer will own the frontend architecture for mission-critical operator experiences, leading technical direction and mentoring engineers to build high ...
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Front End Software Developer information
See Hoboken, NJ salary details
$46.5K - $57.8K
0% of jobs
$57.8K - $69K
1% of jobs
$69K - $80.2K
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$80.2K - $91.5K
3% of jobs
$91.5K - $102.7K
6% of jobs
$108.1K is the 25th percentile. Wages below this are outliers.
$102.7K - $114K
26% of jobs
The median wage is $117.8K / yr.
$114K - $125.2K
34% of jobs
$128.3K is the 75th percentile. Wages above this are outliers.
$125.2K - $136.4K
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$136.4K - $147.7K
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$147.7K - $158.9K
6% of jobs
$158.9K - $170.2K
3% of jobs
$46.5K
$120.8K
$170.2K
How much do front end software developer jobs pay per year?
What are the key skills and qualifications needed to thrive as a front end software developer, and why are they important?
What is a front end software developer?
What is front end software development?
Front end software development involves coding the user-facing aspects of a website or software program. Your responsibilities include using a variety of tools or IDEs (integrated development environments) to write or edit CSS (Cascading Style Sheets), HTML (Hypertext Markup Language), and Javascript code. As a front end software developer, your job is to use your skills to address the look, feel, and overall user experience of an application, more so than the speed, efficiency, or resilience of the backend of the application.
What are some common challenges front end software developers face when working on large-scale web applications?

Full-time
This job post has expired today. Applications are no longer accepted.
Job description
Twenty Technologies is a cybersecurity company focused on industrializing offensive cyber operations for the U.S. and its allies. The Staff / Principal Frontend Software Engineer will own the frontend architecture for mission-critical operator experiences, leading technical direction and mentoring engineers to build high-performance interfaces that visualize complex cyber operation data.
Responsibilities:
• Architect and build sophisticated React/TypeScript applications that operate smoothly at scale.
• Design real-time UI experiences for complex cyber operation data, optimizing for speed and clarity.
• Lead frontend technical architecture and design decisions.
• Build and evolve interactive visualization systems (e.g., graphs, timelines, streaming views).
• Establish reusable frontend architecture patterns and component libraries for consistency and velocity.
• Raise engineering excellence via code review, standards, testing strategy, and performance practices.
• Mentor junior engineers through pairing, feedback, technical coaching, and knowledge transfer.
• Coordinate execution across design, product, backend, and operations to deliver end-to-end features.
• Troubleshoot production issues, lead frontend performance investigations, and improve reliability over time.
Qualifications:
Required:
• You have 8+ years of professional frontend software development experience.
• You have deep expertise building production React.js applications with TypeScript.
• You have strong command of modern web fundamentals (JavaScript/TypeScript, HTML, CSS).
• You have led frontend technical initiatives and mentored engineers through delivery and growth.
• You have experience building for performance at scale (profiling, optimization, rendering strategies).
• You have experience with automated testing practices and frameworks (e.g., Vitest, React Testing Library, Playwright or Cypress for E2E).
• You have hands-on experience with state management patterns and libraries (e.g., Redux, Zustand, or React Query).
• You have strong collaboration skills with product and design to deliver excellent UX.
• You have strong command of Git in a professional engineering environment, including branch workflows, code review practices, and CI integration.
• You have a Bachelor’s degree in CS/Engineering (or equivalent practical experience).
Preferred:
• You have experience with complex data visualization (e.g., D3.js, Chart.js, or similar).
• You have worked with graph databases and understand graph query patterns (e.g., Neo4j).
• You have experience with real-time streaming data and production visualization of live systems.
• You have experience in defense, security, or other mission-critical domains.
• You have built UI experiences that surface AI/ML outputs in operational workflows.
• You have experience with component library or design system development (e.g., Storybook).
Company:
We apply world-class software engineering to a warfighting domain of persistent conflict. Founded in 2024, the company is headquartered in Arlington, USA, with a team of 51-200 employees. The company is currently Early Stage.