Jobs in the United States

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Added 6 mins ago
O
Principal Core Infrastructure Engineer
Oracle
Nashville, TN
- $114,600 to $234,600 USD / year
As a Principal Software Engineer, you will lead the design and development of FastConnect control plane services that manage a globally distributed fleet of networking infrastructure. You…
Added 7 mins ago
Manufacturing Engineer – Business Process Management
Blue Origin Personnel, LLC
Space Coast, FL
We are seeking a dynamic Manufacturing Engineer – Business Process Management to join our New Glenn Manufacturing Engineering (ME) team at Blue Origin. This role will drive manufacturing…
Added 18 mins ago
Powerplant Operator II Licensed
Medxcel
Racine, WI
…healthcare, for healthcare, we have a dedicated focus on our people and customers, as well as providing tools, processes, support resources, data analytics and insource strategies that…
Added 20 mins ago
AI Content Creator
HIGHSCALE
Remote, United States
We’re High Scale - a future-focused, data-obsessed agency revolutionizing video advertising on TV and social media. Think Amazon’s obsession with customer experience meets SpaceX’s fearless…
Added 20 mins ago
AI Content Creator
HIGHSCALE
Remote, United States
We’re High Scale - a future-focused, data-obsessed agency revolutionizing video advertising on TV and social media. Think Amazon’s obsession with customer experience meets SpaceX’s fearless…
Added 20 mins ago
AI Content Creator
HIGHSCALE
Remote, United States
We’re High Scale - a future-focused, data-obsessed agency revolutionizing video advertising on TV and social media. Think Amazon’s obsession with customer experience meets SpaceX’s fearless…
Added 21 mins ago
Sr. Project Management Specialist - Value Stream - CST - Lafayette, Colorado (On-site)
Medtronic
Boxborough, MA
At Medtronic, we bring bold ideas forward with speed and decisiveness to put patients first in everything we do. We’re working onsite 4 days a week to drive performance, foster an…
Added 21 mins ago
Mechanical Engineer
Hii / Hydroid
Pocasset, MA
Added 21 mins ago
Automation Engineer III
Jabil
Clinton, MA
Analyze production data and identify opportunities for process optimization and waste reduction.
Added 21 mins ago
Industrial Engineer
Siemens
Hingham, MA
Proficiency in data analysis tools (e.g., Excel, Minitab, Power BI, SAP, Tableau) and process simulation tools.
Added 21 mins ago
Process Engineer
ManpowerGroup
Newburyport, MA
Proficiency with PFMEA, Control Plans, Process Flows, and data analysis tools (e.g. Excel/BI).
Added 21 mins ago
Manufacturing Engineer
GE Aerospace
Lynn, MA
…sheet metal into flight-critical hardware: forming, resistance and TIG welding, brazing, heat treat, and machining. You’ll work directly with operators, quality, and senior engineers on the…
Added 21 mins ago
DT
Global Operations Supplier Process Engineer Co-Op
Dell Technologies
Franklin, MA
- $37.42 USD / hour
Global Operations Supplier Process Engineer Co-Op Opportunities – Franklin, MA
Added 21 mins ago
Sr. Principal Systems Engineer - Medical Device
Medtronic
Newton, MA
As a Sr. Principal Systems Engineer, you will provide technical leadership for system integration and refine your systems engineering skills to conduct interface testing, both within the…
Added 21 mins ago
Secret RF Engineer - 3rd Shift
Insight Global
Chelmsford, MA
Seeking an experienced RF Engineer to support the production and development of complex multi-function RF modules used in high-reliability aerospace and defense applications. This role…
Added 21 mins ago
Secret RF Engineer - 2nd Shift
Insight Global
Chelmsford, MA
Seeking an experienced RF Engineer to support the production and development of complex multi-function RF modules used in high-reliability aerospace and defense applications. This role…
Added 21 mins ago
Senior Supplier Quality Engineer
Zoll Medical Corporation
Chelmsford, MA
At ZOLL, we're passionate about improving patient outcomes and helping save lives.The Acute Care Technology division of ZOLL develops and delivers innovative lifesaving products and…
Added 21 mins ago
Project Manager R&D
Zoll Medical Corporation
Chelmsford, MA
ZOLL Medical Corporation, an Asahi Kasei Group Company, develops and markets medical devices and software solutions that help advance emergency care and save lives, while increasing…
Added 21 mins ago
Electrical Engineer II
Amazon
North Reading, MA · N Reading, MA
Amazon is seeking a talented and motivated Electrical Engineer to work on system design, implementation and release to manufacturing. The ideal candidate will have experience in system…
Added 21 mins ago
Cloud Engineer II- AWS
Honeywell Technologies
Framingham, MA
Do you enjoy working from the customer perspective and diving deep on issues? As a system development engineer, you will be responsible for the overall health of our AWS cloud-based managed…
Added 21 mins ago
FM
Sr Principal Network Engineer
Fresenius Medical Care
Waltham, MA
- $131,900 to $219,800 USD / year
The Lead Networking Engineer utilizes in-depth knowledge of local area networks (LAN) and wide area networks (WAN) to provide expert input regarding the installation and support of the…
Added 21 mins ago
Staff Overhead Transmission Line Structural Engineer Job Details | Black & Veatch Family of Companies
Black & Veatch
Burlington, MA
Black & Veatch Operations develops, deploys, and maintains global resources and capabilities that guide execution and process excellence across the organization. The foundation of Black &…
Added 22 mins ago
Lead Software Delivery Engineer
GE Vernova
Cambridge, MA
…Management (DvM)… - Asset Management portfolio of software and services for Transmission & Distribution for multiple projects - GE Grid Solutions is looking for a Software Project Delivery…
Added 22 mins ago
Senior Manager, Full-stack Engineer-People Leader
Capital One
Cambridge, MA
In Risk Tech, we provide the foundation for Capital One to thrive in an uncertain world. Our engaged, empowered, and intelligent people produce outstanding products, working toward the…
Added 22 mins ago
Software Engineer, Chrome Networking Security
Google
Cambridge, MA
…technologies that change how billions of users connect, explore, and interact with information and one another. Our products need to handle information at massive scale, and extend well…

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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