Deniz D
Senior Product Security Specialist at Doppel
Montreal, Quebec, Canada
Summary
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RockstarDeniz D is a Senior Product Security Specialist with six years of hands-on experience blending software development, cloud ops, and security across banking, fintech, SaaS startups, and big tech. They design practical, risk-based security solutions that balance speed and reliability, and routinely partner with engineering teams to secure systems at the product, application, and cloud levels. Deniz has contributed security fixes and dependency hardening to high-profile open-source projects like HashiCorp Consul and Nomad—addressing archive extraction vulnerabilities, TLS cipher updates, and token sanitization—demonstrating both offensive and defensive expertise. Their background spans full‑stack app development, CI/CD automation, and offensive testing, enabling them to spot and remediate issues from code to infrastructure. Based in Montreal, they bring a pragmatic, engineering-first approach to product security that scales with company size and objectives.
6 years of coding experience
4 years of employment as a software developer
Github Skills (27)
dependency-management10
env10
tls1210
envoyproxy10
tls1310
nomad10
security10
mtls10
consul10
go10
libtls10
orchestration10
orchestra10
convoy10
filesystem9
Programming languages (9)
Github contributions (5)
hashicorp/consul
Dec 2023 - Mar 2025
Consul is a distributed, highly available, and data center aware solution to connect and configure applications across dynamic, distributed infrastructure.
Role in this project:
Back-end Developer & DevOps Engineer
Back-end Developer & DevOps EngineerContributions:61 reviews, 72 PRs, 94 pushes in 1 year 3 months
Contributions summary:Deniz primarily focused on security-related updates and dependency management within the Consul project. They bumped Go, Envoy, and other dependencies, addressing potential vulnerabilities. Their contributions also included modifications to build configurations and testing infrastructure, demonstrating involvement in DevOps tasks. Additionally, the user made changes related to type conversions and API handling, improving the overall stability and security of the codebase.
api-gatewayecsgolangcenterdistributed
hashicorp/nomad
Jan 2024 - Apr 2025
Nomad is an easy-to-use, flexible, and performant workload orchestrator that can deploy a mix of microservice, batch, containerized, and non-containerized applications. Nomad is easy to operate and scale and has native Consul and Vault integrations.
Role in this project:Backend & Security Engineer
Backend & Security EngineerContributions:63 reviews, 22 PRs, 65 pushes in 1 year 2 months
Contributions summary:Deniz primarily focused on enhancing the security and stability of the Nomad orchestrator. Their contributions include fixing vulnerabilities related to arbitrary file access and symlink escapes during the archive extraction process. They also updated the TLS cipher suites for improved security and sanitized identity tokens and allocation data. The user further worked on resolving type conversion alerts and updating the Go version used in the project.
vaultperformantmicroserviceworkloadoperate
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