Frontend Software Engineer
US$159,000 – US$263,000 / yr base salary
Posted 28 Sep 2026
Advertised as “Senior Frontend Software Engineer”
BranchFactor Summary
The original posting with the fluff stripped out
- Expected experience
- 5–8 yrs
- Management level
- Individual contributor
- Employment
- On-Site
- Contract
- Full-time
| Base salary | US$159,000 – US$263,000 / yr |
|---|
Field of studyComputer Science, Engineering (or related)
Study levelBachelor's
About the Company
America is under sustained cyber attack. Our adversaries infiltrate our networks, steal our IP, and degrade the digital infrastructure that modern life runs on. They’ve learned—correctly—that those attacks rarely produce consequences.
Twenty was founded to change that, by making our adversaries think twice before they attack us. Our vision is American and allied primacy in cyberspace—a future where they cannot contest us, deterrence is assured, and the free world remains secure.
Founded in 2024, Twenty Technologies (www.twenty.io) industrializes offensive cyber operations for the U.S. and its allies. Headquartered in Arlington, Virginia, Twenty has raised $168M from Khosla Ventures, Accel, Caffeinated Capital, Friends & Family Capital, Point72 Ventures, General Catalyst, and In-Q-Tel.
Mission | On Site | Full Time | U.S. Citizenship Required / No Active Clearance Required
Role Summary
You'll be a high-output engineer building mission-critical operator experiences — implementing complex, high-performance interfaces that visualize real-time cyber operation data with speed and precision. You'll contribute meaningfully to frontend architecture and design decisions, own significant features end-to-end, and raise the quality of the codebase around you. You'll work closely with other frontend engineers and cross-functional partners across backend, product, design, and operations to ship capabilities that must work reliably in both cloud and on-premises environments.
What You'll Do
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Build sophisticated React/TypeScript features and components that operate reliably at scale.
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Implement real-time UI experiences for complex cyber operation data, optimizing for speed and clarity.
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Contribute to frontend architecture and design decisions alongside your teammates.
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Build and maintain interactive visualization components (e.g., graphs, timelines, streaming views).
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Write and maintain automated tests across unit, integration, and end-to-end layers.
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Participate actively in code review — giving and receiving feedback that raises the quality bar.
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Identify and address performance issues, technical debt, and reliability gaps proactively.
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Collaborate with design, product, backend, and operations to deliver well-integrated features.