Senior Software Engineer
First seen by Alion on Sep 18, 2026.
About the role:
As a key member of the Secure Web Browser development team, reporting to the Senior Manager for Data Protection Cloud Services, you will work with an Agile software development team to design and deploy exciting new features for our browser-based security software. In this role, you will own the development of advanced Data Loss Prevention capabilities, such as Watermarking, translating cutting-edge research into production-ready code. By securing these critical user workflows, your work will directly eliminate data exfiltration risks for our enterprise clients, scaling the reach and impact of our cloud security suite.
What you will do:
- Connect Across Teams: Partner closely with the Core DLP Scanning and Web Proxy engineering teams to ensure seamless product integration, while collaborating with Product Management and UI/UX Designers to keep our security features intuitive and powerful.
- Build and Innovate: Spend dedicated time writing clean, secure code to develop core browser security features like Watermarking.
- Collaborate in an Agile Environment: Participate in daily stand-ups, sprint planning, and code reviews, operating within a highly supportive, team-first Agile ecosystem.
- Research and Prototype: Dedicate time to exploring cutting-edge security trends and technical solutions to stay ahead of evolving digital threats.
- Deliver Impact: Take ownership of core deliverables, from initial technical scoping and architectural design to shipping production-ready software updates.
What we are looking for:
- A Natural Connector: You have a proven ability to form genuine, positive relationships across multiple levels of an organization.
- An Effective Influencer: Your communication and influencing skills allow you to articulate complex technical ideas clearly.
- Thriving in Growth: You feel energized working in a faster-paced, high-growth environment.
Technical Expertise:
- JavaScript Specialist: 5 - 8 years of experience with deep understanding of core features (Proxy, apply, monkey patching).
- Browser Security: Strong grasp of CORS, CSP, and Trusted Types.
- Web & Networking: Familiarity with HTTPS, proxies, WebSockets, and secure contexts.
- Performance & Automation: Experience with Lighthouse and frameworks like Cypress, Selenium, or Playwright.
- Security Toolkit: Understanding of website reverse-engineering, vulnerability testing, SAST, and DAST.
- Quality: Familiarity with JavaScript testing frameworks, unit tests, and mocks.
Skills
Security, Cyber Security, DLP, ProxySG, HTTPS, SAST, DAST