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# Senior Software Engineer, Application Security

- **Company:** Mid-south Testing, Inc.
- **Location:** San Francisco, CA, United States
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** Java (Programming Language), User Authentication, C++ (Programming Language), Cloud Computing, Computer Programming, Software Debugging, Mobile Application Software, Python (Programming Language), Session Management, System Programming, Google Cloud, Software Security, Discord, Golang
- **Published:** November 7, 2026
- **Apply:** https://www.juju.com/job/28_25303_ca888f77a8c280261d7c4487a7d2336b

## About the Role

We are looking for a Senior Software Engineer to join our Application Security team and protect Discord's users where it matters most, their accounts. If you are an engineer with a wealth of experience making the secure way the easy way, a deep sense of curiosity, and an endless desire to improve Discord, read on!, * You have 5+ years of experience securing production applications.

 * You have 3+ years of experience programming in at least one general-purpose programming language (e.g., Python, Go, Java, or Rust).
 * You have hands-on experience building and shipping production software, including security features, controls, frameworks, or guardrails.
 * You have hands-on experience with authentication and account security, such as WebAuthn, passkeys, FIDO2, MFA, and session management.
 * You are comfortable reasoning about the security of complex systems, even if they contain components you aren't familiar with, and can give engineers clear, sound guidance on secure design and implementation.
 * You have experience leading security projects with a cross-functional group.
 * You have experience building or hardening client applications, such as desktop or native mobile apps.
 * You have experience operating in cloud-based environments (we use Google Cloud, but experience with other platforms is okay too)., * Experience programming in at least one systems programming language (e.g. C, C++).
 * Experience developing, operating, and debugging production systems.
 * Familiarity with common application vulnerabilities on the platforms Discord ships on (that\'s all of them).

## Description

* Join an engineering team designing and implementing full-stack, user-facing security solutions that protect hundreds of millions of Discord users.
 * Lead full-stack work to strengthen session security and authentication for Discord's users.
 * Improve, operate, and maintain security-critical authentication services, owning their correctness and security.
 * Partner with Product teams to drive adoption of stronger authentication and to ship user-facing account security tools.
 * Identify and design solutions for emerging threats to user account security.
 * Research and implement new security capabilities for the Discord platform, staying current on the authentication and session security landscape.
 * Build security controls and tools that emphasize self-service, automation, and performance to help identify and mitigate account security flaws.