Jobs in the United States

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Added 3 mins ago
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Embedded Software Engineer
Actalent
King George, VA
- $80,000 to $135,000 USD / year
Design, code, and engineer embedded software solutions for weapon control systems across multiple Battle Management System projects.
Added 3 mins ago
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Project Manager
Actalent
Utica, MI
- $33.65 to $52.9 USD / hour
…This position offers an excellent opportunity for a Project Engineer, Assistant Project Manager, or Project Coordinator looking to advance their career in construction…
Added 3 mins ago
A
Controls Engineer
Actalent
Traverse City, MI
- $38 to $45 USD / hour
Job Title: Controls EngineerJob DescriptionThe Controls Engineer designs, develops, and supports control systems for custom industrial equipment and automation projects. This role focuses…
Added 3 mins ago
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Robotics Engineer
Actalent
Grand Rapids, MI
- $48 to $50 USD / hour
Our local custom machine build client is seeking an experienced Robotics Engineer to join their team full time. You will develop, program, and integrate robotic systems in automated…
Added 3 mins ago
Electrical Engineer
Actalent
Grand Rapids, MI
The Electrical Engineer is responsible for designing and implementing electrical control systems for custom automation projects. This role involves planning, executing, and supporting…
Added 3 mins ago
Machine Design Engineer
Actalent
Grand Rapids, MI
Job Title: Machine Design EngineerJob DescriptionThe Machine Design Engineer designs and develops custom automated equipment, primarily for the automotive industry. Using FEA, GD&T, and 3D…
Added 3 mins ago
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Field Service Engineer
Actalent
Muncie, IN
- $30 to $55 USD / hour
adjustment of the job application process or interviewing process due to a disability,
Added 4 mins ago
Mechanical Engineer
Actalent
Bastrop, TX
Job Title: Mechanical EngineerJob DescriptionThe Mechanical Engineer will support printed circuit board (PCB) manufacturing operations with a primary focus on process improvement,…
Added 4 mins ago
Senior Software Engineer, Embedded Systems, Firmware, Android XR
Google
Kirkland, WA
Share Senior Software Engineer, Embedded Systems, Firmware, Android XR
Added 4 mins ago
Software Development Engineer, GNC Software, Amazon Leo
Amazon
Redmond, WA
Added 4 mins ago
Sr Industrial Engineer, Amazon Leo Tooling and GSE
Amazon
Redmond, WA
Added 4 mins ago
Software Test Engineer
WCG Clinical
Olympia, WA
The Software Test Engineer is a member of the Quality Engineering team, responsible for supporting the testing, validation and delivery of WCG namedproducts and systems.The role applies…
Added 4 mins ago
Sr. Structural Engineer, Data Center Engineering
Amazon
Seattle, WA
Amazon Web Services (AWS) is seeking a Senior Structural Engineer to become part of a Data Center Engineering team. This engineer will be located in any of the 3 offices listed with intent…
Added 4 mins ago
Software Engineering Manager II, Google Cloud Storage
Google
Seattle, WA
XIn most instances, this position requires in-person interviews as part of the hiring process.
Added 4 mins ago
Software Dev Engineer II, Selection Monitoring - Catalog Enrichment
Amazon
Seattle, WA
1+ years of software development engineer or related occupational experience
Added 4 mins ago
Senior Software Engineer, Embedded Systems, Platforms and Devices
Google
Kirkland, WA · Seattle, WA
Share Senior Software Engineer, Embedded Systems, Platforms and Devices
Added 8 mins ago
Operations Engineer
POET
Sioux Falls, SD
The Operations Engineer analyzes real time bioprocessing facility data to identify opportunities to improve performance throughout the POET fleet. In this role, you will design and drive…
Added 14 mins ago
Quality Engineer
Applied Medical Technology Inc.
Brecksville, OH
Resource in Engineering Change Order review process
Added 15 mins ago
HA
Maintenance Engineer I
HOSP Ann & Robert H. Lurie Children's Hospital of Chicago
Chicago, IL
- $28.5 to $46.6 USD / hour
Added 17 mins ago
TL
Software Quality Assurance Engineer
Throne Labs
North Brentwood, MD · Seattle, WA
- $100,000 to $135,000 USD / year
Throne is looking for a full-time Software Quality Assurance (QA) Engineer to be a crucial member of the Software and R&D Engineering Teams. Thrones are proprietary technology which include…
Added 20 mins ago
Senior Software Engineer, Recommendations, Rankings, Predictions, Search Discover
Google
Mountain View, CA
In most instances, this position requires in-person interviews as part of the hiring process.
Added 24 mins ago
Assistant Civil Engineer - Aviation & Federal (San Diego)
Burns & McDonnell
San Diego, CA
The Assistant Civil Engineer will work under the supervision of a licensed professional engineer to assist project teams in creating world-class designs for new projects, alterations, and…
Added 27 mins ago
CO
Supervising Civil Engineer
City of Berkeley
Berkeley, CA
- $78.17 to $94.38 USD / hour
The City of Berkeley invites you to apply for the position of Supervising Civil Engineer in the Public Works Department!
Added 28 mins ago
Senior Manufacturing Engineer - 2nd Shift (Onsite)
RTX Corporation
rockford, IL
Utilizing data, characterize process failures using root cause investigations implementing corrective actions and mistake-proofing
Added 28 mins ago
Senior Mechanical Engineer, Kiewit Infrastructure Engineers
Kiewit
Itasca, IL · Chicago, IL
Kiewit Infrastructure Engineers is seeking a Senior Mechanical Engineer to help drive the rapid growth of our infrastructure division and support high-impact projects across North America.…

FacilityOS

Senior Software Engineer

Annapolis, MD, United States

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Job details

Experience: Minimum of 6 years of proven experience in backend .NET Framework / .NET Core web application development using C#.
Posting language: English
Posted: Nov 1, 2026

Original job description

ABOUT FACILITYOS

FacilityOS is a fast-growing company redefining how facilities operate - bringing safety, security, and daily operations into one unified platform used by organizations around the world.

As we continue to scale globally, we’re building a team of driven, curious people who want to make an impact. You’ll be part of a dynamic, collaborative culture where individuals are trusted to take ownership, solve meaningful problems, and grow in their careers. Our team comes together in-office twice a week to connect, collaborate, and build momentum.

If you’re looking to do your best work alongside a great team in a high-growth environment, FacilityOS is the place to build your career.

About the Role:

We are looking for a highly capable Sr. Back-End Engineer who can ramp up quickly, collaborate effectively with the existing team, and begin contributing meaningful delivery outcomes within the first few weeks. This role is well suited for someone who is comfortable navigating legacy systems, applying strong architectural principles, and making thoughtful technical decisions that improve delivery throughput without compromising quality.

The ideal candidate brings strong backend engineering experience, sound judgment, and the ability to work independently while staying closely aligned with team standards and architectural direction.

This role is a hybrid position where you’ll be required to come into our office three (3) times a week.

Duties and Responsibilities:

Design, develop, review, and maintain backend web applications and services across the FacilityOS platform.
Quickly develop a working understanding of existing platform architecture, legacy components, integration points, and modernization opportunities.
Collaborate with the engineering team to make sound technical decisions that align with established architectural principles and delivery goals.
Contribute to legacy modernization efforts using incremental, low-risk approaches such as the Strangler Fig pattern where appropriate.
Maintain high code-quality standards through code reviews, unit testing, static code analysis, and the adoption or improvement of engineering tools and standards.
Participate actively in peer code reviews, providing constructive feedback and helping promote maintainable, testable, and scalable solutions.
Troubleshoot and resolve application issues across environments, including staging and production, with a focus on root-cause analysis and sustainable fixes.
Work directly with engineering leads, product stakeholders, and project managers to support business operations and project delivery.
Research, evaluate, and recommend innovative application, automation, and architectural improvements that would benefit the FacilityOS platform.

Skills and Qualifications:

Minimum of 6 years of proven experience in backend .NET Framework / .NET Core web application development using C#.
Proven ability to quickly understand complex legacy systems, identify key integration points, and contribute effectively with limited ramp-up time.
Strong experience using object-oriented programming, design patterns, and clean architecture principles to build maintainable, testable software.
Proven experience writing unit tests and applying quality-focused development practices.
Proven experience designing and building RESTful services.
Experience in designing and building cloud-native SaaS and PaaS applications (Azure / AWS). Azure cloud experience will be preferred
Solid knowledge of Microsoft SQL Server and T-SQL.
Ability to make sound technical decisions in collaboration with existing engineering teams.
Proactive, curious, and investigative mindset with strong attention to quality and detail.
Passion for technology, continuous improvement, and modern engineering practices.
Ability to self-manage priorities and deliver outcomes with minimal supervision.
Strong team-player attitude with the ability to collaborate across engineering, architecture, and product stakeholders.
Hands-on experience with Event-Driven architecture is a plus
Hands-on experience with Microservices is a plus

Why work at FacilityOS?

We work hard and play hard and we do both with passion and respect for one another. Our company promotes a fast-paced, fun, friendly, and highly collaborative work environment that provides:

🩺Comprehensive health coverage

🏠A Hybrid work environment

💡Opportunity for advancement and growth

🍕 Catered Events, Snacks, Drinks – You won’t go Hungry!

🥳 Birthday and Life Celebrations

🎉 Two annual parties in a year

FacilityOS Commitment

We believe that a diverse team is the key to innovation and growth. We are an equal opportunity employer that value diversity at our company and encourage all candidates to apply. We do not discriminate based on race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status.

FacilityOS will accommodate individuals with disabilities through each stage of the recruitment and selection process. Please advise us of any needs when your interview is booked, and we will do our best to meet your needs.

Please note that all candidates must be legally eligible to work in the location in which you applied.

Background and Reference Checks

Any offer of employment may be conditional upon full background checks including a criminal record check, a credit check and employment and educational verifications. A reference check will also be conducted.

We may use artificial intelligence (AI) tools to support parts of the hiring process such as reviewing applications. These tools assist the recruitment team but do not replace human judgment. All advancement and hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us or click here https://www.deeplytalented.com/responsible-ai.

FacilityOS thanks all candidates for their interest, however only those selected to continue in the process will be contacted.

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