Open to opportunities

Gustavo Okamoto

@gustavookamoto

Security engineer using Rust for detection engineering and post-quantum cryptography, creating DFS for measurable detection quality.

Brazil

Message

What I'm looking for

I’m looking to build Rust-based security systems that improve detection signal quality, advance post-quantum cryptography, and ship reliable production APIs—valuing open-source collaboration and measurable, auditable outcomes.

I’m a security engineer specializing in Rust systems programming, post-quantum cryptography, and detection engineering. I created the Detection Fidelity Score (DFS) framework to quantify the signal quality of security detections and move beyond binary alert logic.

I designed and built Vortex DFS, a production REST API that combines real-time PII anonymization with LWE-based post-quantum cryptographic signing. I also implemented a crypto-agility audit scanner aligned to NIST migration standards (FIPS 203/204), and I diagnosed and resolved a live Tokio concurrency defect by root-causing from logs and shipping a fix within hours.

I actively contribute to open source, with merged contributions to the OpenTelemetry Collector and Elastic Detection Rules. I aim to build security systems that are auditable, constant-time where needed, and operationally reliable—backed by end-to-end ownership of infrastructure like Stripe billing, Supabase/PostgreSQL, and Cloudflare deployment.

Experience

Work history, roles, and key accomplishments

Current

Founder & Engineer

Current

Okamoto Security Labs

Jan 2025 - Present (1 year 6 months)

Designed and built Vortex DFS, a Rust REST API for real-time PII anonymization and post-quantum cryptographic audit logging. Implemented an LWE-based digital signature scheme, built a crypto-agility audit scanner, and resolved a Tokio concurrency defect in production.

Rust Actix Web Tokio Sqlx Post Quantum Cryptography Detection Engineering Anonymization PostgreSQL Supabase REST APIs Constant Time Cryptographic Implementation CI CD cloud deployment Cloudflare Supabase PostgreSQL Connection Pooling Detection Fidelity Scoring Crypto Agility Auditing Fiat Shamir Transform

Creator

Detection Fidelity Score (DFS) Framework

Designed the Detection Fidelity Score (DFS) framework to quantify the signal quality of security detections. Applied DFS principles to production detection pipelines to reduce false-positive noise and prioritize triage by signal confidence.

Detection Fidelity Scoring Detection Engineering Security Triage Auditable Confidence Model