The Role

The Senior Software Engineer (Rust) - Proxy Services will own the conversion of Securly's web filtering proxy business logic from C++ to production Rust — maintaining behavioral parity across a high-throughput proxy that handles HTTP/HTTPS traffic for millions of students daily.

A modern, memory-safe Rust proxy is already underway at Securly. When you join, the initial Rust proxy is in production and your mission is the next phase: integrating and converting the existing C++ business logic into production Rust. This means reading C++, reasoning about behavior, and re-implementing it correctly — including HTTPS tunneling, TLS interception, JavaScript injection into HTML responses (the ACP-48 shim pattern), and Redis-based policy lookups. Precision and behavioral correctness are non-negotiable.

At L5, you are not just a skilled implementer. You own the conversion strategy, define the phasing and testing approach, surface architectural risks to the L6 lead, and raise the Rust competency of the broader proxy team.

Level: **L5____**Experience: **8–15 Years_____**Location: **Pune, India_____**Work Type: **Hybrid (2 days onsite)_____**Reports To: Filter Engineering Manager

What You'll Do

Own the C++ to Rust conversion strategy: define the porting sequence, identify behavioral risks, and establish the testing approach that gives confidence in parity before cutover.
Read, debug, and deeply understand existing C++ proxy business logic, then port it to production Rust with full behavioral parity.
Build and maintain forward proxy operations: HTTPS CONNECT tunneling, TLS interception, HTTP/1.1 and HTTP/2, header manipulation, connection pooling.
Implement JavaScript content script injection into HTML responses (ACP-48 shim pattern) — enabling proxy-side injection for customers not served by the Chrome extension.
Integrate Redis-based real-time policy lookups; handle Redis failure modes gracefully; document degraded-mode behavior and validate it under load.
Profile and benchmark proxy performance under high-concurrency load; use flame graphs to validate changes; maintain a written performance baseline document.
Identify gaps in the existing C++ codebase where behavior is unclear or likely incorrect — treating the port as an opportunity to improve, not just replicate.
Mentor junior Rust engineers on ownership models, async patterns, and systems-level debugging.
Collaborate closely with the Proxy Hardening engineer on shared infrastructure and production issues.

Skills & Requirements

The Role

Level: **L5____**Experience: **8–15 Years_____**Location: **Pune, India_____**Work Type: **Hybrid (2 days onsite)_____**Reports To: Filter Engineering Manager

What You'll Do

Own the C++ to Rust conversion strategy: define the porting sequence, identify behavioral risks, and establish the testing approach that gives confidence in parity before cutover.

Read, debug, and deeply understand existing C++ proxy business logic, then port it to production Rust with full behavioral parity.

Build and maintain forward proxy operations: HTTPS CONNECT tunneling, TLS interception, HTTP/1.1 and HTTP/2, header manipulation, connection pooling.

Implement JavaScript content script injection into HTML responses (ACP-48 shim pattern) — enabling proxy-side injection for customers not served by the Chrome extension.

Integrate Redis-based real-time policy lookups; handle Redis failure modes gracefully; document degraded-mode behavior and validate it under load.

Profile and benchmark proxy performance under high-concurrency load; use flame graphs to validate changes; maintain a written performance baseline document.

Identify gaps in the existing C++ codebase where behavior is unclear or likely incorrect — treating the port as an opportunity to improve, not just replicate.

Mentor junior Rust engineers on ownership models, async patterns, and systems-level debugging.

Collaborate closely with the Proxy Hardening engineer on shared infrastructure and production issues.

Senior Software Engineer (Rust) - Proxy Services

The Role

What You'll Do

Skills & Requirements

Senior Software Engineer (Rust) - Proxy Services

The Role

What You'll Do

Skills & Requirements

Must-Have

Strongly Preferred

Nice to Have

Who You Are

What It Means to Be L5 at Securly

About Securly

Benefits

Securly

Securly

Benefits

Securly