Senior Security Engineer – Application Security

Job not on LinkedIn

🕒 January 28

🇺🇸 United States – Remote

⏰ Full Time

🟠 Senior

💻 Application Engineer

🦅 H1B Visa Sponsor

This company has sponsored H1B visas in the past.

👻 Ghost score 53%

What it means: how likely this posting is sitting open without active hiring.How to read it: 60% or higher means we think this is a ghost. Lower scores are less of a worry.How we score it: age, reposts, open roles vs team size, how fast jobs close, and whether pay is listed.Fine print: an estimate from public data, not a judgment of the company. Real jobs can score high, so treat it as a hint, not a fact.

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Turnkey

WebsiteLinkedInAll Job Openings

11 - 50 employees

Founded 2022

₿ Crypto

💳 Fintech

🔌 API

Crypto • Fintech • API

Turnkey is a provider of a secure, flexible, and scalable wallet infrastructure focused on private key management for cryptocurrency applications. Their platform allows developers to create non-custodial wallets, sign transactions, and automate on-chain actions through a straightforward API. Turnkey emphasizes cryptographic security and offers a range of features that aid in creating seamless and efficient digital asset management solutions for both individuals and businesses.

📋 Description

• You will partner with Product and Engineering at both the design and development stage to ensure that we implement new features securely, including (but not limited to): • - Participating in the implementation efforts • - Doing security reviews • - Helping with product design decisions • - Auditing and surfacing vulnerabilities in our current products • - Conducting threat modeling and security assessments for new features and systems, identifying risks early and shaping secure architectural decisions. • - Developing and improving our Automated Tooling: further enhancing our automated tooling to scale our product security capabilities and find potential code problems both before and after we deploy • - Making the safe way, the easy way: work on defining and building application guardrails so that developers can build securely by default • - Investigating and remediating security issues, including vulnerabilities and incidents, and drive long-term improvements to prevent recurrence • - Embedding a culture of secure development across engineering, defining practices that influence how Turnkey builds, deploys, and maintains systems at scale.

🎯 Requirements

• Bachelors degree in Computer Science, Engineering, or a related field • 5+ years of experience in application or product security, ideally in fast-moving, high-impact or crypto-native environments • Strong understanding of web, mobile, and cryptographic security fundamentals (e.g. OWASP Top Ten, SANS/CWE Top 25) • Proficiency in programming and scripting languages (Typescript/Javascript, Go, Rust) and experience building secure systems from the code up • Hands-on experience with security testing tools and methodologies (static/dynamic analysis, pen testing, etc.) • Strong understanding of cloud, containerized, and runtime environments (AWS, GCP, Docker, Kubernetes), with the ability to embed security early in the SDLC • Excellent analytical, problem-solving, and communication skills, with a collaborative mindset for partnering across product and infrastructure teams • Curious, proactive, and passionate about building secure, reliable systems in a fast moving startup environment • A builder mentality; comfortable operating with ambiguity, tackling incomplete systems, and applying hands-on engineering experience to security challenges. • Familiarity with crypto or DeFi systems and their unique security challenges • Familiarity with threat modeling frameworks and cloud-native security tooling

🏖️ Benefits

• Full benefits, including medical, dental, vision, life, disability, HSA/FSA, 401(k) - detailed benefits overview available as we get further in the process • Paid parental leave • Unlimited PTO (and we will force you to take time off!) • $3,000/yr learning and development budget to attend industry conferences • Multiple team offsites per year • Macbook Pro laptop • Lunch stipend (for those physically in the New York City office)