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Added 3 mins ago
DevOps Engineer
DataOne
Vineland, NJ
DataOne is hiring a DevOps Engineer to build, automate, and maintain the infrastructure and deployment pipelines that support our AI Factories and 24/7 Tier III mission-critical facilities.…
Added 4 mins ago
CS
Test Engineer 3 - Linux/Bash/Python/HPC/Gitlab/CI/CD/Docker
Captivation Software
Annapolis Junction, MD
- $130,000 to $270,000 USD / year
Captivation Software is looking for a senior level test engineer who shall be responsible for planning, developing, executing, and automating testing activities for software applications,…
Added 4 mins ago
CS
Systems Engineer 1 - Linux/Bash/Python/STE/STN/Cisco/Docker
Captivation Software
Annapolis Junction, MD
- $130,000 to $270,000 USD / year
Captivation Software is looking for a mid level systems engineer who shall collaborate closely with customer stakeholders to support a closed system that spans multiple locations across…
Added 4 mins ago
CS
Software Integration Engineer 3 - Linux/Bash/Python/Java/Ansible/Gitlab/CI/CD
Captivation Software
Annapolis Junction, MD
- $130,000 to $270,000 USD / year
Captivation Software is looking for a senior level software integration engineer who shall be responsible for supporting the team and mission services. The environment provides several…
Added 4 mins ago
CS
Software Engineer 3 - Linux/Python/Docker/Kubernetes/LLM/CI/CD/Grafana
Captivation Software
Annapolis Junction, MD
- $130,000 to $270,000 USD / year
Captivation Software is looking for a senior level software engineer who shall design, develop, deploy, and support solutions within a high-performance computing (HPC) Linux environment.…
Added 4 mins ago
CS
Software Engineer 2 - DevOps
Captivation Software
Annapolis Junction, MD
- $130,000 to $270,000 USD / year
Captivation Software is looking for a mid level software engineer who will be working in a DevOps focused position. In this position, the DevOps Software Engineer shall be responsible for…
Added 7 mins ago
Infrastructure Software Engineer II (Remote - US)
BNSF
United States
Develop and operate Kubernetes-native systems using GitOps workflows
Added 10 mins ago
Senior Systems Engineer
Belay Technologies
Fort Meade, MD
Belay Technologies is seeking a Senior Systems Engineer to join our intel team. The System Integrator will assist customers integrating the Single Sign On capability into their systems or…
Added 11 mins ago
J
Test Engineer I - AN/BYG-1
Jobot
Manassas, VA · Middletown, RI
- $78,000 to $86,000 USD / year
Test Engineer I - AN/BYG-1, On-site in Manassas, VA
Added 15 mins ago
Site Reliability Engineer
Quarterhill
UNAVAILABLE
Quarterhill is seeking a Senior Site Reliability Engineer (SRE) to join our growing team. This role is an exciting opportunity to contribute to the reliability and performance of smart…
Added 16 mins ago
Site Reliability Engineer - Fleet Command & Control
Etched
San Jose, CA
…command-and-control layer for our fleet of frontier inference systems: the alerting, automated recovery and fleet data that keep clusters serving, and the routing that gets each problem to…
Added 22 mins ago
C
Staff Flight Software Engineer
CesiumAstro
Westminster, CO
- $158,000 to $189,000 USD / year
…ideal candidate will be an experienced spacecraft software engineer, motivated to develop every aspect of space mission software from Linux-based satellite operating systems to low-level…
Added 22 mins ago
C
Senior Embedded Software Engineer
CesiumAstro
El Segundo, CA
- $140,000 to $168,000 USD / year
…phases of the development process. Key projects will include Linux-based single-board computers and high-reliability microcontroller systems. Cesium’s goal is to create an out-of-the-box…
Added 27 mins ago
Firmware Engineer II
Spectra Logic
Boulder, CO
Spectra Logic is hiring a Firmware Engineer to design, build and validate embedded firmware for its tape library systems, including the Cube and TFinity platforms. You will write the code…
Added 32 mins ago
CS
Software Integration Engineer 4 - Linux/Bash/Python/VMware/Ansible/Docker/Gitlab
Captivation Software
Annapolis Junction, MD
- $130,000 to $270,000 USD / year
Captivation Software is looking for a senior level software integration engineer who shall be responsible for the test, evaluation, integration, and troubleshooting of the HPC software…
Added 32 mins ago
CS
Software Engineer 3 - Linux/Bash/Python/Keycloak/Ansible/Docker/CI/CD
Captivation Software
Annapolis Junction, MD
- $130,000 to $270,000 USD / year
Captivation Software is looking for a senior level software engineer who shall be responsible for implementing access controls and permission mechanisms for securing access to critical HPC…
Added 32 mins ago
CS
Software Engineer 3 - Linux/Bash/Python/Java/IaC/Docker/CI/CD
Captivation Software
Annapolis Junction, MD
- $130,000 to $270,000 USD / year
Captivation Software is looking for a senior level software engineer who shall be responsible for the engineering, implementation, integration, and sustainment of the project Tool's Suite…
Added 32 mins ago
CS
Software Engineer 3 - Linux/Bash/Python/Apache Airflow/SQL/Jupyter Notebook/NumPy/JSON
Captivation Software
Annapolis Junction, MD
- $130,000 to $270,000 USD / year
Captivation Software is looking for a senior level software engineer who shall possess extensive expertise in dataflow design, data transport mechanisms, and Apache Spark based distributed…
Added 32 mins ago
CS
Software Engineer 2 - Linux/Bash/Python/Rust/HPC/CI/CD/Git/Agile
Captivation Software
Annapolis Junction, MD
- $130,000 to $270,000 USD / year
Captivation Software is looking for a mid level software engineer who shall be responsible for developing and maintaining system management infrastructure software and services for High…
Added 32 mins ago
CS
Software Engineer 2 - Linux/Bash/Python/HashiCorp/Docker/Ansible/HPC
Captivation Software
Annapolis Junction, MD
- $130,000 to $270,000 USD / year
Captivation Software is looking for a mid level software engineer who shall be responsible for developing and maintaining system management infrastructure software and services for High…
Added 32 mins ago
CS
Software Engineer 2 - Linux/Bash/Python/CI/CD/Git/Docker
Captivation Software
Annapolis Junction, MD
- $130,000 to $270,000 USD / year
Captivation Software is looking for a mid level software engineer who shall be responsible for developing and maintaining system management infrastructure software and services for High…
Added 35 mins ago
IT Field Services Technician
TAD PGS, Inc.
Laurel, MD
…You will work primarily on Microsoft Windows, Macintosh and Linux…
Added 35 mins ago
Systems Engineer (6902)
MetroStar
Reston, VA
As a Sr. Systems Engineer I, you'll be responsible for managing and maintaining an organization's computer systems and servers. Key responsibilities include designing, installing, and…
Added 38 mins ago
Low Latency Trading Infrastructure Engineer
Citi
JACKSONVILLE, FL · IRVING, TX · Jacksonville, FL · Irving, TX · Jacksonville · Irving
The Low Latency Trading Infrastructure Engineer is a rare combination of deep technical specialist and mission-critical operator - a professional whose expertise sits at the intersection of…
Added 39 mins ago
IT Linux Systems Engineer
SpaceX
Memphis, TN
SpaceX is looking for an experienced engineer with deep knowledge and broad experience across Linux-based technologies. This employee will be a member of the Information Technology Linux…

Lambda

Senior Product Security Engineer

San Francisco, CA, United States
Bellevue, WA, United States

$296,000 to $395,000 USD / year

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Job details

Pay: $296,000 to $395,000 USD / year
Posting language: English
Posted: Nov 4, 2026

Original job description

Lambda, The Superintelligence Cloud, is a leader in AI cloud infrastructure serving tens of thousands of customers. Our customers range from AI researchers to enterprises and hyperscalers. Lambda's mission is to make compute as ubiquitous as electricity and give everyone the power of superintelligence. One person, one GPU.

If you'd like to build the world's best AI cloud, join us.

*Note: This position requires presence in our San Francisco or Bellevue office location 4 days per week; Lambda’s designated work from home day is currently Tuesday.

About the Role

Lambda Security protects some of the world's most valuable digital assets: training data, model weights representing immense computational investments, and the sensitive inputs required to leverage best-of-breed AI models. We're responsible for securing every byte that powers breakthrough artificial intelligence.

As a Senior Security Engineer on Product Security, you'll make sure the right security decisions get made in everything Lambda sells, from the network and cluster infrastructure in our data centers to the software our customers use every day. Reporting to the Senior Manager of Security, you'll join a team spanning infrastructure security and application security, owning security outcomes for your area and partnering closely with Product Engineering, Data Center Operations and Engineering, Detection & Response, and GRC.

Product security at Lambda generates and protects revenue. Enterprises and AI labs evaluate our security before they move billion-dollar training runs and irreplaceable model weights onto our infrastructure, and this team supplies the answers. As Lambda launches new products and expands into new data centers, you'll threat model and review the designs behind each one, keep every customer's workloads isolated from the network fabric up, run vulnerability management as a risk-driven program, and bring technical depth to the customer security reviews behind enterprise deals. You'll work with direct access to LLMs hosted on Lambda's own infrastructure, alongside frontier models and AI tools, to take code and design review further than traditional approaches allow.

Product security covers a lot of ground, and we don't expect one person to be an expert in all of it. Some of our team go deep on infrastructure: networks, clusters, Linux and the hardware underneath. Others go deep on application security and code. We expect you to bring real depth in one and contribute across both. If you'd rather build security into systems alongside the engineers who own them than audit them from the outside, we'd love to talk.

We value diverse backgrounds, experiences, and skills, and we are excited to hear from candidates who can bring unique perspectives to our team. If you do not exactly meet this description but believe you may be a good fit, please still apply and help us understand your readiness for this role. Your application is not a waste of our time.

What You'll Do

Review Designs and Threat Model: Own security design reviews and threat models for the systems in your area, delivering actionable recommendations while changes are still cheap.
Secure Multi-Tenant Infrastructure: Harden the network, cluster, and infrastructure-service layers that keep each customer's workloads isolated from every other customer's.
Find and Fix Vulnerabilities in Code: Review application code and infrastructure as code, find vulnerabilities through analysis and testing, and land fixes with the owning team.
Run Vulnerability Management as a Program: Turn scanner output into accurate, prioritized facts about real risk, and drive remediation to SLA alongside our Technical Program Managers.
Develop Security Patterns and Requirements: Turn recurring review findings into requirements, reference patterns, and guardrails that the teams you support adopt by default.
Enable Enterprise Deals: Partner with GRC on customer security reviews and architecture discussions, giving customers clear, technically grounded answers about how we protect their workloads.
Build Security Tooling: Ship Python or Go automation, using Lambda-hosted LLMs, frontier models, and AI tools, that extends review and triage coverage.
Partner Across Engineering: Work with Product Engineering, Data Center Operations and Engineering, and Detection & Response, including on bug bounty and vulnerability disclosure reports.
Coach Engineers: Help engineers in the teams you support build secure design instincts, and mentor newer members of the security team.
Balance Strategic and Tactical: Recognize when to invest in a long-term fix versus when "good enough" is exactly that, and bias toward measurable forward progress.

You

5+ years of demonstrated security engineering experience, either directly as a security engineer or as a software, infrastructure, or site reliability engineer driving security outcomes. We also welcome equivalent backgrounds: significant formal security training paired with strong engineering experience.
Demonstrated depth in infrastructure security or application security, with design reviews, threat models, or fixes that engineering teams actually adopted.
A track record of independently owning security work end to end, making sound calls on your own and knowing when to escalate.
Thrives in high-speed, high-ambiguity startup environments where priorities shift regularly and structure must be built while executing.
Strong hands-on Linux experience in both bare metal and cloud environments, understanding infrastructure from kernel to application layer.
Reads application code and infrastructure as code (e.g., Terraform, Ansible, Kubernetes manifests) fluently enough to explain a vulnerability's root cause, not just a scanner's verdict.
Ships production-grade tooling in Python, Go, or a similar language, rather than only one-off scripts.
Translates security risk into business impact for engineers, leadership, and customers, enabling them to make informed decisions.
Excellent collaboration with technical teams both with and without authority (we're all on the same team!).

Nice to Have

Deep code analysis expertise, such as source code auditing, fuzzing, reverse engineering, or vulnerability research with published findings or CVEs.
Experience securing multi-tenant infrastructure: network segmentation, virtualization or container isolation, Kubernetes, or hardware root of trust and secure boot.
You've led the security assessment and requirements for a major platform component or enterprise system.
Experience building infrastructure-as-code security guardrails, such as policy-as-code checks in CI/CD or secure-by-default modules.
You've run vulnerability management as a program, with risk-based prioritization and remediation SLAs that held.
Experience supporting enterprise customer security reviews, or providing significant evidence for compliance audits such as SOC 2, ISO 27001, or FedRAMP.
Experience with AI/ML infrastructure security, model security, or protecting high-value computational workloads.
Significant experience operating large-scale production services (e.g., SRE across thousands of hosts) or with virtualization at scale (KVM, Hyper-V, Xen).
Enthusiasm about leveraging LLMs on Lambda's own infrastructure, frontier models, and AI tools to push product security beyond the status quo, including through AI-assisted code review, automated threat modeling, and intelligent vulnerability triage.

Salary Range Information

The annual salary range for this position has been set based on market data and other factors. However, a salary higher or lower than this range may be appropriate for a candidate whose qualifications differ meaningfully from those listed in the job description.

About Lambda

Founded in 2012, with 500+ employees, and growing fast
Our investors notably include TWG Global, US Innovative Technology Fund (USIT), Andra Capital, SGW, Andrej Karpathy, ARK Invest, Fincadia Advisors, G Squared, In-Q-Tel (IQT), KHK & Partners, NVIDIA, Pegatron, Supermicro, Wistron, Wiwynn, Gradient Ventures, Mercato Partners, SVB, 1517, and Crescent Cove
We have research papers accepted at top machine learning and graphics conferences, including NeurIPS, ICCV, SIGGRAPH, and TOG
Our values are publicly available: https://lambda.ai/careers
We offer generous cash & equity compensation
Health, dental, and vision coverage for you and your dependents
Wellness and commuter stipends for select roles
401k Plan with 2% company match (USA employees)
Flexible paid time off plan that we all actually use

Equal Opportunity Employer

Lambda is an Equal Opportunity employer. Applicants are considered without regard to race, color, religion, creed, national origin, age, sex, gender, marital status, sexual orientation and identity, genetic information, veteran status, citizenship, or any other factors prohibited by local, state, or federal law.

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More about this job

Skills

Linux
Infrastructure as code
IBM Terraform
Ansible
Kubernetes
Python
Go
Leadership
Auditing
Reverse engineering
Research
CI/CD
Prioritization
Regulatory compliance
ML

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