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Senior Security Engineer

mission.dev • United State
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First dedicated security hire to own the organization's security posture across the entire technical stack for a stealth-mode enterprise identity platform startup. Will architect foundational security infrastructure, conduct threat modeling and security reviews, and drive compliance initiatives including SOC 2 and ISO 27001. Requires 5+ years in security engineering with strong software engineering foundation, professional proficiency in Go and Python, and experience building security programs from the ground up.

Key Highlights
First dedicated security hire with high autonomy to build foundational security programs from scratch
Reporting directly to a co-founder, embedded within the engineering team throughout the product lifecycle
Stealth-mode startup developing next-generation enterprise identity platform with significant venture backing
Security is the core value proposition of the product being built
Opportunity to eventually lead the security function as the company scales
Key Responsibilities
Establish and manage the end-to-end security posture by embedding within engineering workflows from design to deployment
Architect and build foundational security infrastructure including secrets management, PKI, audit logging, and vulnerability management systems
Conduct technical security reviews, threat modeling, and secure design consultations to ensure safe and rapid product development
Direct global compliance initiatives such as SOC 2 and ISO 27001 by implementing functional engineering controls
Develop incident response processes and detection-as-code capabilities to automate triage and mitigation
Oversee product security, corporate security, and initial security team growth strategies
Technical Skills Required
Go Python Security Engineering
Benefits & Perks
Annual salary $180,000–$230,000 plus early-stage equity
Comprehensive health, dental, and vision insurance with 99% premium coverage
Unlimited PTO and approximately 21 paid company holidays
12 weeks of paid parental leave
Twice-yearly company offsites and team retreats
Nice to Have
Experience building security programs from the ground up at early-stage companies
Domain expertise in identity and access management (IAM) or enterprise security software
Knowledge of Kubernetes and cloud security within GCP environments
Familiarity with identity protocols such as OAuth, SAML, OIDC, and WebAuthn
Relevant academic background in Computer Science or a related field

Job Description

Agreement type: This is a remote, full-time role requiring 40 hours per week, with direct client hiring.

Candidate´s location: USA

Our company description

Mission.dev is the next-gen staffing platform for software talent.

We help you find, evaluate, and manage top software talent (contractors or direct hires) faster, smarter, and more efficiently.

Powered by AI. Backed by real humans.

About the client

This stealth-mode startup is developing a next-generation enterprise identity platform.

Led by experienced founders who previously scaled and exited a technology company, the organization aims to modernize access management and authentication.

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