Jobs in the United States

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Added 1 hour ago
Instrumentation and Controls Engineer
Kelly Services
Watertown, MA
A fast-growing cleantech company in Watertown, MA is seeking an Instrumentation & Control Systems Engineer to help scale an innovative critical minerals extraction technology. The company…
Added 1 hour ago
Google Infrastructure and Security Lead Architect
Deloitte
Boston, MA
As a Google Cloud (GCP) Infrastructure & Security Lead Architect, you will serve as a strategic technical leader and trusted advisor for our enterprise clients, guiding them through complex…
Added 1 hour ago
Google AI Architect
Deloitte
Boston, MA
Lead cloud-native development on GKE, Cloud Run, Pub/Sub, BigQuery, Cloud SQL/Spanner, Memorystore, and Terraform; enforce application and agentic design patterns.
Added 1 hour ago
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Senior Security Engineer
LiteLLM
Remote, United States
- $220,000 to $260,000 USD / year
LiteLLM is the world’s most popular AI Gateway, trusted by companies like Adobe, Netflix, and NASA. Our platform gives developers secure, reliable access to LLMs and adjacent services.…
Added 1 hour ago
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Cloud Security Engineer - Boston, MA
Kelly Services
Boston, MA
- $180,000 to $220,000 USD / year
A growing organization is seeking a Cloud Security Engineer to help strengthen and scale its cloud security program across modern infrastructure environments. This hybrid position, based in…
Added 1 hour ago
KS
Lead Platform Engineer - Boston, MA
Kelly Services
Boston, MA
- $200,000 to $240,000 USD / year
An established technology-driven organization is seeking a Lead Platform Engineer to help shape and scale the infrastructure powering critical business applications. This hybrid role offers…
Added 1 hour ago
Cyber Operate Manager - GCP Cloud DevOps Engineer
Deloitte
Boston, MA
Deloitte is seeking a Lead Managed Services Engineer II to design, automate, and operate enterprise-scale cloud capabilities that support clients' critical cyber assets. In this role, you…
Added 1 hour ago
Staff Mobile Engineer, iOS
Lingo US Inc
CA
As a Staff Mobile Engineer, iOS at Lingo, you will lead the design and development of the iOS applications and shared iOS platform components that power our biosensing experience. In this…
Added 2 hours ago
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ASIC Technical Lead Engineer
BioTalent
San Diego, CA
- $220,000 USD / year
Work with the in-house test engineer on silicon bring-up and characterization, and lead debug when issues come up
Added 2 hours ago
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Principal AI/ML Engineer Remote Nationwide or Office-Based in MN/DC/NJ
UnitedHealth Group
Eden Prairie, MN
- $164,600 to $282,200 USD / year
As the Principal AI/ML Engineer for GTS, you will serve as a director-level, hands-on technical leader who researches, designs, builds, and ships enterprise AI solutions for healthcare…
Added 2 hours ago
K
Associate Director, AI Application Engineer
KPMG
Louisville, KY
- $7.25 USD / hour
Lead a team of engineers in the design, development, deployment, and support of AI-enabled applications and platform capabilities using .NET Core, C#, Python, and modern cloud-native…
Added 2 hours ago
Equipment Maintenance Engineer
Harbinger Motors Inc.
Garden Grove, CA
…pooled their deep experience to bring a first-of-its-kind EV platform to support the growing demand for medium-duty EVs and Hybrids. Harbinger: Familiar Form, Revolutionary…
Added 2 hours ago
Liquids Platform SME
Kenvue Brands LLC Legal Entity
PA
The Liquids Platform SME (Subject Matter Expert) Engineer reports to the Liquids Platform Director, he \ she is:
Added 3 hours ago
Network Engineer - Collaboration & Enterprise Connectivity
Prologis Management LLC
Denver, CO · San Francisco, CA · Los Angeles, CA · Chicago, IL · NY · Seattle, WA
At Prologis, we don’t just lead the industry - we define it with a 1.3 billion square foot portfolio and an annual throughput of approximately $3.2 trillion. We create the intelligent…
Added 3 hours ago
Principal Ruby on Rails Engineer
Fifth Third Bank, National Association
United States
Integrate our platform with bank core services and APIs
Added 3 hours ago
Staff+ Software Engineer, Backend
Anthropic
San Francisco, CA · New York City, NY
Platform Ecosystem: The Ecosystem team is empowering the next big industries beyond coding to build on our platform & creating the right commercial rails to let any business in our…
Added 3 hours ago
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Systems Security Engineer
Blacksmith
New York City, NY
- $225,000 to $300,000 USD / year
We are looking for a Systems Security Engineer to build and operate security controls at Blacksmith. Your primary focus will be our bare-metal fleet, with responsibility extending to our…
Added 3 hours ago
EU
Agile Coach
Experis USA
Jersey City, NJ
- $80 to $85 USD / hour
Strong experience serving as a Release Train Engineer, Senior Scrum Master, Agile Program Manager, or Delivery Lead in a large-scale Agile environment.
Added 3 hours ago
Senior Infrastructure Engineer - Network
Compeer Financial
Bloomington, IL · Lakeville, MN · Mankato, MN · Sun Prairie, WI
Demonstrated ability to lead complex technical work, create clarity in ambiguity, and resolve cross-platform issues across organizational and vendor boundaries.
Added 4 hours ago
Lead Research Engineer – AI Evaluation & Benchmarking
Eagan, MN · Frisco, TX · NY · Ann Arbor, MI
Thomson Reuters Labs is seeking a Lead Research Engineer to lead the design and delivery of production-ready software for artificial intelligence (AI) model evaluation and benchmarking. You…
Added 4 hours ago
S
AI & Innovation Lead, G&A
Sanity
Remote, United States
- $165,000 to $180,000 USD / year
In this role, you’ll join the Finance team as the AI & Innovation Lead, G&A, reporting to the CFO. You’ll sit in Finance with a dotted line to our Director of Systems Engineering. This role…
Added 4 hours ago
Sr. AI Engineer
CalPrivate Bank
San Diego, CA · Brea, CA · El Segundo, CA · Newport Beach, CA
The Senior AI Engineer will help identify opportunities to automate manual processes, improve access to actionable information, enhance reporting and forecasting, and responsibly…
Added 4 hours ago
Sr. Application Security Engineer
Pax8, Inc
Remote, United States
🛡️ Senior Application Security Engineer | United States | Remote
Added 4 hours ago
Production Support Data Engineer
Charles Schwab Inc.
Southlake, TX · Austin, TX
…products and services at scale. As a Production Support Data Engineer supporting Schwab’s cloud data and analytics ecosystem, you will lead the operational support of enterprise data…
Added 4 hours ago
EP
Identity and Access Management Engineer [Hybrid or Remote]
EDF power solutions
CA-San Diego US-Any City · San Diego, CA · Any City
- $107,200 to $178,600 USD / year
…that fosters our goal of delivering renewable solutions to lead the transition to a sustainable energy…

Blacksmith

Systems Security Engineer

New York City, NY, United States

$225,000 to $300,000 USD / year

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Job details

Pay: $225,000 to $300,000 USD / year
Posting language: English
Posted: Oct 30, 2026

Original job description

About Blacksmith

We started by building infrastructure to run CI workloads really fast. Our first product helps companies run GitHub Actions substantially faster and cheaper by owning and operating our own global fleet of bare-metal machines rather than renting generic cloud VMs.
Today, we orchestrate tens of millions of Firecracker VMs each week, running CI for 10,000+ companies and tens of millions in ARR. We’ve grown 20x so far in 2026.
We operate thousands of bare-metal machines across multiple regions, regularly schedule 300k+ vCPUs concurrently, and run a petabyte-scale Ceph cluster that we manage ourselves.
We’ve raised $125M from Seed to Series C, led by Sequoia, Google Ventures (GV) & Peak XV Partners, and we’re intentionally building a small, but exceptional team.
Blacksmith was founded by a team with deep systems and scaling experience, including building search/ads infrastructure at Faire, and operating large distributed systems at Cockroach Labs. Our GTM is led by Jon Boyer, formerly Head of Sales at Zapier.
We're now extending the same CI infrastructure into a broader platform: running agent sandboxes at scale and building our own background coding agent on top of it.

The role at Blacksmith

We are looking for a Systems Security Engineer to build and operate security controls at Blacksmith. Your primary focus will be our bare-metal fleet, with responsibility extending to our AWS control plane, application services and the broader organization.

This is a hands-on engineering role. You'll work alongside our systems engineers to harden production systems, strengthen workload isolation, and investigate and remediate security issues. You'll partner with our Security Lead to translate security priorities into engineering work.

What you’ll be doing

Identify, prioritize and remediate security risks across our bare-metal fleet, AWS control plane, application services and the broader organization.
Strengthen tenant isolation, host hardening, network boundaries and access controls across our platform.
Build and operate automated security controls for secure configuration, vulnerability remediation, intrusion detection and response, validating their effectiveness without compromising production reliability or performance.
Investigate and respond to security incidents, driving remediation through to completion.
Partner with engineering and IT to establish secure defaults and practical security standards across systems and workflows, balancing security, reliability and usability.

You’re a good fit if you have

Strong Linux systems experience, with the ability to debug production issues across the kernel, networking and storage stack.
A practical understanding of security fundamentals, including least privilege, defense in depth and threat modeling, and the ability to translate risks into technical solutions.
Experience with virtualization and Linux isolation primitives, such as Firecracker, KVM, namespaces and cgroups, and an understanding of their security boundaries and tradeoffs.
An understanding of storage access controls, tenant isolation and secure data deletion.
An understanding of how to use eBPF for runtime security monitoring, including observing process, file and network activity to detect suspicious behavior.
Experience securing production AWS environments, particularly IAM, networking and audit logging.
The ability to write and debug production code in Go, Rust, C, C++ or similar, and automate security changes through configuration management and infrastructure as code.
Strong comfort with agent-driven development and debugging, including directing coding agents, reviewing their changes and validating correctness and security.
A track record of turning ambiguous problems into practical engineering solutions, owning implementation through production rollout, and explaining technical tradeoffs to engineers, leadership and non-technical partners.

We welcome candidates from security engineering, systems engineering and SRE backgrounds. You should bring strong systems fundamentals and a demonstrated interest in securing the infrastructure you operate.

Bonus

You've found or reported CVEs, done container or VM escape research, or competed in CTFs.
You've secured multi-tenant infrastructure running untrusted workloads, such as CI runners, cloud compute or agent sandboxes.
You've built or extended eBPF-based detection tooling, turning runtime telemetry into actionable alerts and investigations.
You've secured software delivery pipelines, including build isolation, artifact signing, image provenance or secrets handling.
You've operated or secured distributed storage systems such as Ceph or MinIO in production.
You've secured macOS infrastructure running untrusted workloads.

Compensation and benefits

Medical, Vision, and Dental insurance.
Competitive base + equity.
401K match.
Unlimited PTO.
Annual offsite.
Early-exercise stock options.
12 weeks fully paid parental leave (US).

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More about this job

Skills

AWS
Security threats
Security regulations
Linux
Identity and access management
Go
Rust
C
C++
Infrastructure as code
Debugging
Leadership
Research

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