Senior Engineer II, Proxy

menlosecurity; United States; Remote; USD 140,000 - 210,000; Full time

Job summary

Menlo Security is seeking an experienced engineer to own and evolve a high-traffic ingress proxy that serves as the primary entry point to a security platform. You’ll drive performance, reliability, and secure handling of traffic from both people and AI agents, from design through production.

You will design, build, and operate proxy features, optimize latency in high-concurrency services, and modernize legacy components with safe migration strategies while ensuring long-term security and

Qualifications

• Five+ years building and operating production systems.
• Strong hands-on experience with Rust or Go; experience with both is useful.
• Working knowledge of HTTP and TLS.
• Experience building asynchronous services for high concurrency, including backpressure, cancellation, and non-blocking I/O failure modes.
• Background in performance tuning and secure systems, including threat modeling, vulnerability reduction, and data integrity in distributed environments.
• Ability to lead work through its full lifecycle, explain architectural choices, and assess AI-assisted code critically for correctness and fit.

Responsibilities

• Design, build, and operate proxy features that apply security controls to incoming traffic.
• Improve latency and throughput in high-concurrency network services.
• Modernize legacy components while keeping them in production, using staged traffic migration and safer architecture changes.
• Make technical decisions about system design and language trade-offs, emphasizing long-term security and maintainability.
• Validate behavior with integration tests, fuzzing, and property-based testing, including failure scenarios.
• Work with teammates and partner groups to clarify customer needs, review changes, and share secure engineering practices.

Skills

Rust

Go

HTTP

TLS

Job description

Role overview

Own and evolve a high-traffic ingress proxy that serves as a primary entry point to a security platform. The work spans performance, reliability, and secure handling of traffic from both people and AI agents, with responsibility for taking changes from design through production.

Responsibilities

• Design, build, and operate proxy features that apply security controls to incoming traffic.


• Improve latency and throughput in high-concurrency network services.


• Modernize legacy components while keeping them in production, using staged traffic migration and safer architecture changes.


• Make technical decisions about system design and language trade-offs, emphasizing long-term security and maintainability.


• Validate behavior with integration tests, fuzzing, and property-based testing, including failure scenarios.


• Work with teammates and partner groups to clarify customer needs, review changes, and share secure engineering practices.

Requirements

• At least five years building and operating production systems.


• Strong hands-on experience with Rust or Go; experience with both is useful.


• Working knowledge of HTTP and TLS.


• Experience building asynchronous services for high concurrency, including handling backpressure, cancellation, and non-blocking I/O failure modes.


• Background in performance tuning and secure systems, including threat modeling, vulnerability reduction, and data integrity in distributed environments.


• Ability to lead work through its full lifecycle, explain architectural choices, and assess AI-assisted code critically for correctness and fit.

Nice to have

• Experience using profiling tools and concurrency techniques to optimize network applications.


• Experience safely migrating traffic during legacy rewrites.


• Familiarity with fuzzing and property-based testing.