Backend Software Engineer
US$192,000 – US$455,000 / yr base salary
Posted 28 Sep 2026
Advertised as “Staff/Principal Backend Software Engineer”
BranchFactor Summary
The original posting with the fluff stripped out
- Expected experience
- 10+ yrs
- Management level
- People management
- Employment
- On-Site
- Contract
- Full-time
| Base salary | US$192,000 – US$455,000 / yr |
|---|
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 design and build backend systems that turn real-time operational data into mission-critical capabilities. This role owns core services that need to be fast, reliable, and secure—operating across cloud and on-prem environments. You’ll make high-leverage architecture decisions, drive technical execution, and raise the bar through mentorship and engineering standards. You’ll partner closely with product, operations, and frontend teams to ship systems that work under real-world constraints.
What You’ll Do
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Architect and build high-throughput backend services that process real-time operational data.
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Lead technical design reviews and choose pragmatic approaches for new features and system improvements.
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Design event-driven and distributed systems that are resilient, observable, and performance-tuned.
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Define stable APIs for internal and external consumers, partnering with frontend for seamless integration.
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Improve engineering excellence through code reviews, standards, testing strategy, and incident practices.
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Build and maintain CI/CD workflows that enable rapid, secure delivery.
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Troubleshoot complex production issues, lead incident response, and drive durable fixes.
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Partner with product and operational stakeholders to translate needs into deliverable technical plans.
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Contribute to technical strategy and roadmap planning across backend services.