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Added 26 mins ago
C
Chief Building Engineer
CBRE
Washington D.C., DC
- $90,000 to $125,000 USD / year
In addition to ourcore facility and project management capabilities, our platform offers directaccess to our Best-in-Class services, including ESG, Security Consulting,Workplace Strategy,…
Added 26 mins ago
Nuclear Engineer (Deputy Director, Reactor Refueling Division)
National Nuclear Security Administration
Washington, DC
Added 1 hour ago
Electrical Commissioning Engineer II
Bureau Vertias North America
VA
…satisfactorily. The requirements listed below are representative of the knowledge, skill, and/or ability required. Reasonable accommodations may be made to enable individuals with…
Added 1 hour ago
Electrical Commissioning Engineer 1.5
Bureau Vertias North America
VA
…satisfactorily. The requirements listed below are representative of the knowledge, skill, and/or ability required. Reasonable accommodations may be made to enable individuals with…
Added 1 hour ago
Mechanical Commissioning Engineer I
Bureau Vertias North America
VA
…satisfactorily. The requirements listed below are representative of the knowledge, skill, and/or ability required. Reasonable accommodations may be made to enable individuals with…
Added 1 hour ago
Network Engineering/Operations Site Lead
Leidos
Fort Belvoir, VA
This is a people-leadership and operations-management role , not a hands-on keyboard engineering position. The ideal candidate is a proven leader who can establish priorities, develop…
Added 1 hour ago
Expert Level Systems Engineer
SHINE Systems & Technologies
Fort Belvoir, VA
Assists the Government in strategic technical planning, project management, performance engineering, risk management and interface design.
Added 1 hour ago
Senior Project Engineering Manager
Kerry
Harrisonburg, VA
As a Senior Project Engineer, you’ll own high-impact capital projects from idea to start-up ($50K–$5MM) across Kerry’s Stocks & Broths manufacturing network in Harrisonburg, VA. This is a…
Added 1 hour ago
Network Administrator (Network Communications 4)
Huntington Ingalls Industries
Virginia Beach, VA
HII supports the Department of Energy’s national security mission through the management and operation of its sites, as well as the safe cleanup of legacy waste across the country. HII…
Added 1 hour ago
Software Development Engineer, Leo Space Security
Amazon
Arlington, VA · Herndon, VA
We are looking for a software development engineer to join the founding cohort of the Engineering and R&D team within Leo Space Security. The team defends the manufacturing lines, launch…
Added 1 hour ago
Information Systems Security Engineer (ISSE)
Amazon
Arlington, VA
We are seeking a Senior Information Systems Security Engineer (ISSE) to raise the security bar for a portfolio of classified national security systems. You will work backward from mission…
Added 1 hour ago
EG
Senior Firewall, VPN & DMZ Network Engineer
Eliassen Group
Norfolk, VA
- $70 to $80 USD / hour
Our client seeks a Firewall, VPN, and DMZ Network Engineer to support the SMIT program for the United States Navy. The role focuses on designing, implementing, and maintaining network…
Added 1 hour ago
Zero Trust Engineer, Lead
BOOZ, ALLEN & HAMILTON, INC.
McLean, VA
…architected networks to execute its mission at speed and scale. As a senior Zero Trust Engineer lead, you will serve as a strategic leader responsible for shaping, governing, and advancing…
Added 2 hours ago
Senior Software Engineer (Data Engineering)
Workday, Inc.
CA · GA
You are a highly motivated and skilled Software engineer with a passion for data engineering and machine learning. You strive to apply technology to drive real impact on Workday's business…
Added 2 hours ago
SS
Senior Substation Structures & Equipment Engineer
Strategic Staffing Solutions
Tampa, FL
- $130,000 to $150,000 USD / year
We are seeking a Senior Electrical Engineer specializing in substation structures and equipment to support major capital projects and electric delivery infrastructure. This role provides…
Added 3 hours ago
BA
Systems Engineer, Senior
Booz Allen Hamilton
Aurora, CO
- $86,800 to $198,000 USD / year
…technology solutions. Share your expertise through requirements management processes within planning, design, implementation, testing, and release phases of a developmental and operational…
Added 3 hours ago
SS
Senior Substation Structures & Equipment Engineer
Strategic Staffing Solutions
Tampa, FL
- $150,000 USD / year
We are seeking a Senior Electrical Engineer specializing in substation structures and equipment to support major capital projects and electric delivery infrastructure. This role provides…
Added 3 hours ago
Hardware Architecture Manager
Ford
Dearborn, MI · Dearborn
Champion “Engineer as Designer,” strengthening CATIA/3DX, CAE, and ADAMS MBD proficiency.
Added 3 hours ago
Hardware Architecture Manager
Ford Global
Dearborn, MI
Champion “Engineer as Designer,” strengthening CATIA/3DX, CAE, and ADAMS MBD proficiency.
Added 3 hours ago
Sr HSE Engineer
Honeywell Technologies
Northford, CT
As a Senior HSE Engineer here at Honeywell, you will be responsible for overseeing and directing the organization's health, safety, and environmental engineering efforts. You will ensure…
Added 3 hours ago
S
Senior Energy Engineer
Siemens
Cromwell, CT
- $92,589 to $158,725 USD / year
The Senior Energy Engineer conducts facility site visits, analyzes the customer’s current situation, and produces plans for Facility Improvement Measures (FIMs). This position also assists…
Added 3 hours ago
Research General Engineer
U.S. Coast Guard
New London, CT
Summary This vacancy is for a GS-0801-13, Research General Engineer located in the Department of Homeland Security, U.S. Coast Guard, CG R and D CENTER TECHNICAL DIVISION in NEW LONDON,…
Added 4 hours ago
G
Land Development Project Manager PE
GPAC
San Diego, CA
- $130,000 to $165,000 USD / year
A well-established civil engineering consulting firm is seeking an experienced Senior Land Development Project Manager to lead a growing portfolio of site development projects.
Added 4 hours ago
Construction Sales Engineer (LMV)
Siemens
Tulsa, OK
Building long term relationships with senior management at key customer accounts, solution partners and channel.
Added 4 hours ago
Process Engineer Sr.
AMCOR FLEXIBLES NORTH AMERICA INC
OSHKOSH, WI

Halcyon

Senior Backend Cloud Engineer

Remote, United States

Base Salary Range: $120,000 - $170,000

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Job details

Pay: Base Salary Range: $120,000 - $170,000
Experience: 5+ years of backend engineering experience, with recent experience in a JVM-based codebase.
Posting language: English
Posted: Nov 6, 2026

Original job description

What we do:

Halcyon is the industry’s first dedicated, adaptive security platform that combines multiple proprietary advanced prevention engines along with AI models focused specifically on stopping ransomware.

Who we are:

Halcyon was formed in 2021 by a team of cyber industry veterans after battling the scourge of ransomware (and advanced threats) for years at some of the largest global security vendors. Comprised of leaders from Cylance (now Blackberry), Accuvant (now Optiv), Fireye and ISS X-Force (now IBM), Halcyon is focused on building products and solutions for mid-market and enterprise customers.

As a remote-native, completely distributed global team, we recognize great talent can exist anywhere. We invite you to apply to a job you’re interested in and we'll work a plan to meet your needs.

The Role

At Halcyon, we’re building a world-class anti-ransomware platform grounded in innovation and resilience. As part of that vision, we’re looking for a Senior Backend Engineer to join our cloud team. You’ll lead the development and evolution of our data platform and API services, working within a modern tech stack that blends Scala and Rust.

You’ll join a team focused on building scalable, maintainable backend systems that serve both internal and customer-facing functions. Your primary focus will be on Rust and Scala services, with opportunities to shape our transition to Rust where it makes sense. Python development experience is highly valued, particularly for supporting our security analysis platform which includes malware analysis engines, automated threat detection, and machine learning workflows.

Responsibilities

Lead the design and delivery of features across our data platform and public API services, including ingestion, transformation, and enrichment of security data.
Drive system design, architecture, and data flow decisions in partnership with product and platform engineering.
Build, deploy, and own Scala-based backend services in production, keeping them reliable, secure, and performant.
Help shape and execute our migration of selected APIs from Scala to Rust, ensuring consistency and continuity along the way.
Set the bar for code quality, documentation, and operational excellence.
Lead design reviews, code reviews and take part in on-call and incident response.
Support and enhance our Python-based security analysis platform, including malware analysis engines, automated threat detection, and machine learning model workflows.

Skills and Qualifications

5+ years of backend engineering experience, with recent experience in a JVM-based codebase.
A track record of designing and owning distributed systems from start to finish.
Experience with Rust, or a well-formed view of when it’s the right tool, and the ability to help guide a migration.
Strong understanding of APIs, messaging systems (Kafka), and modern data stores (Postgres, DynamoDB, OpenSearch).
Experience building services in a cloud-native environment, preferably AWS.
Working knowledge of containers and Kubernetes.
Comfortable working in a remote-first, asynchronous team environment.

Bonus Skills and Qualifications

Familiarity with functional programming patterns and idiomatic Scala.
Experience with Databricks and ClickHouse (or similar lakehouse and analytical/OLAP data stores).
Experience with Terraform, Helm, and GitHub Actions.
Familiarity with observability tools (Prometheus, Grafana, CloudWatch).
Prior work on security products, data pipelines, or high-availability systems.
Python development experience, particularly with security analysis tools and malware detection frameworks (YARA, PE analysis, binary analysis).
Familiarity with machine learning workflows, AutoML, and MLflow for model deployment and management.
Experience with binary analysis libraries (LIEF, ssdeep, TLSH) and security tooling integration.

Benefits:

Halcyon offers the following benefits to eligible employees:

• Comprehensive healthcare (medical, dental, and vision) with premiums paid in full for employees and dependents.

• 401k plan with a generous employer contribution.

• Short and long-term disability coverage, basic life and AD&D insurance plans.

• Medical and dependent care FSA options.

• Flexible PTO policy.

• Parental leave.

• Generous equity offering.

The Company reserves the right to modify or change these benefits programs at any time, with or without notice.

Base Salary Range: $120,000 - $170,000

Bonus Target: 10% In accordance with applicable state and federal laws, the range provided is Halcyon’s reasonable estimate of the base compensation for this role. The actual amount may differ based on non-discriminatory factors such as experience, knowledge, skills, abilities, and location. Base pay is one part of the total package that is provided to compensate and recognize employees for their work, and this role may be eligible for additional discretionary bonuses/incentives, and equity in the Company.

We understand it takes a diverse team of highly intelligent, passionate, curious, and creative people to develop the exceptional product we are building. Our dynamic team has incredible perspectives to share, just as we know you do, and we take great pride in being an equal opportunity employer.

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