Principal Engineer (Auth)

Menlo Securitys mission is enabling the world to connect communicate and collaborate securely without compromise. COVID-19 has made our mission all the more real. We support customers across various enterprises including Fortune 500 companies 9/10 of the largest global banks and the Department of Defense.

The world has fundamentally changed. We are growing from 400 employees into the next phase of our journey and we need passionate talent filled with empathy and agility. The right candidate for the job is ethical hyper-organized fanatical about seeing things through to completion service-oriented and humble enough to take feedback and coaching yet confident enough to provide feedback and coaching.

Menlo is well-funded for growth and our investors are second to none. They include Vista Equity Partners (Vista) General Catalyst JPMC American Express HSBC and Ericsson Ventures.

Were looking for a principal engineer to own our authentication service. Authentication is at the root of our browser security product. Every user request flows through it so the decisions you make here have real consequences: for security for performance and for how the system evolves over time. Youll work with a small team that values autonomy and ships without a lot of process overhead. Youll bring technical leadership to an existing system and team and youll own what you build together.

What Were Looking For

Strong Systems Programming Background: Extensive hands-on experience building and maintaining production systems in Rust or Go with a preference for languages that offer strong safety guarantees in critical applications.

Passion for the Craft: You care about building software the right way. Correctness scalability and maintainability matter to you beyond just getting a feature out the door.

Focus on Performance Optimization: Demonstrated ability to optimize for latency and throughput in networked applications using profiling tools and efficient concurrency models to handle demanding workloads.

Security-Oriented Engineering Practices: Strong background in implementing secure systems with a proactive approach to threat modeling vulnerability mitigation and ensuring data integrity in distributed environments.

Expertise in Asynchronous Programming: Youve built and operated async services that handle high concurrency in production. You understand back-pressure cancellation and the failure modes that come with non-blocking I/O.

Problem-Solving for Legacy Rewrites: Experience refactoring legacy codebases into more robust architectures evaluating trade-offs in language choices while favoring those that align with long-term maintainability and security.

Commitment to Testing and Verification: History of employing comprehensive testing strategies including fuzzing property-based testing and integration tests to validate correctness under various failure scenarios.

Collaborative Technical Leadership: Ability to articulate and defend architectural decisions in team settings while mentoring others on best practices for secure software development.

Strategic Use of AI Tools: Proficiency in leveraging LLMs thoughtfully and selectively to boost productivity while critically assessing outputs to prevent AI slop and ensure system-wide architectural correctness maintainability and alignment with broader engineering goals.

Ownership: Be responsible for the full lifecycle of the services you build working closely with existing team members who have deep context on the system.

Communication: Work with your team and across teams to understand customer needs refine requirements implement review and deliver changes.

Requirements

• 8 years of experience building and operating production systems

• Experience in Rust or Go strongly preferred
  

Our Compensation and Benefits

At Menlo Security Base Salary is one part of our competitive total compensation and benefits package and is determined using a salary range. The base salary range for this role is $145000 - $255000.

In accordance with NY CO CA and WA law the range provided is Menlo Securitys reasonable estimate of the base compensation for this role. The actual amount may be higher or lower based on non-discriminatory factors such as experience knowledge skills abilities and location. All employees may be eligible to become Menlo Security shareholders through eligibility for stock-based compensation grants which are awarded to employees based on company and individual performance.

Menlo Security does not accept unsolicited resumes from search firm recruiters. Fees will not be paid in the event a candidate submitted by a recruiter without an agreement in place is hired; such resumes will be deemed the sole property of Menlo Security.

Menlo Security is an equal opportunity employer. All aspects of employment will be based on merit competence performance and business needs. We do not discriminate on the basis of race color religion marital status age national origin ancestry physical or mental disability medical condition pregnancy genetic information gender sexual orientation gender identity or expression veteran status or any other status protected under federal state or local law.

MSGL-I4

Why Menlo

Our culture is collaborative inclusive and fun! We have five core values: Stay Aligned Get It Done Customer Empathy Think Creatively and Help Each Other Out. We believe in open communication supporting new ideas and sharing a mutual mindset of what were aiming to achieve together. There are tremendous opportunities to take initiative implement new ideas and have a hand in building a legacy.

All qualified applicants will receive consideration for employment without regard to race sex color religion sexual orientation gender identity national origin protected veteran status or on the basis of disability.

TO ALL AGENCIES: Please no phone calls or emails to any employee of Menlo Security outside of the Talent organization. Menlo Securitys policy is to only accept resumes from agencies via Ashby (ATS). Agencies must have a valid services agreement executed and must have been assigned by the Talent team to a specific requisition. Any resume submitted outside of this process will be deemed the sole property of Menlo the event a candidate submitted outside of this policy is hired no fee or payment will be paid.

Required Experience:

Staff IC