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Added 5 mins ago
Principal SecOps & Observability Engineer (Clearance Secret or Top Secret)
Hewlett Packard Enterprise
Ft. Collins, CO · Montgomery, AL · Spring, TX · Oklahoma City, OK · All, MD · All, FL
…technical leadership, drives technical direction grounded in research and industry best practice, and contributes to mentorship and knowledge sharing across the…
Added 28 mins ago
Principal SecOps & Observability Engineer (Clearance Secret or Top Secret)
Hewlett Packard Enterprise
Ft. Collins, CO · Montgomery, AL · Spring, TX · Oklahoma City, OK · All, MD · All, FL
…technical leadership, drives technical direction grounded in research and industry best practice, and contributes to mentorship and knowledge sharing across the…
Added 36 mins ago
Network Engineer
Valiant Solutions, LLC
Springfield, VA, VA
Valiant Solutions is seeking a Network Engineer to join our rapidly growing and innovative team!
Added 37 mins ago
Forward Deployed Engineer
Armadin
Palo Alto, CA
As a Forward Deployed Engineer at Armadin, you'll embed with enterprise teams, deploy our agentic platform into their environment, and build whatever it takes to make it work for them.…
Added 52 mins ago
AF
Injection Stretch Blow Molding Process Engineer
Amcor Flexibles, LLC
Shelbyville, KY
- $7.25 USD / hour
…improving process/tooling issues. In addition, the Process Engineer will hold the responsibility for process optimization and recommendations for mold modification to new tooling to meet…
Added 1 hour ago
Endpoint Security Engineer
Valiant Solutions, LLC
Springfield, VA, VA · St. Louis, MO
Valiant Solutions is seeking an Endpoint Security Engineer to join our rapidly growing and innovative team!
Added 1 hour ago
Cybersecurity Implementation Engineer
Valiant Solutions, LLC
Springfield, VA, VA
Valiant Solutions is seeking a Cybersecurity Implementation Engineer to join our rapidly growing and innovative team!
Added 1 hour ago
TI
Applied AI Engineer, Go-to-Market
Tutor Intelligence
Watertown, MA
- $130,000 to $250,000 USD / year
Tutor is a robotics research and deployment company, building generally capable robot hardware and artificial intelligence to enable robots to go where no robots have gone before. Sonny is…
Added 1 hour ago
TI
Applied AI Engineer, Finance
Tutor Intelligence
Watertown, MA
- $130,000 to $250,000 USD / year
Tutor is a robotics research and deployment company, building generally capable robot hardware and artificial intelligence to enable robots to go where no robots have gone before. Sonny is…
Added 2 hours ago
Associate Human Factors Engineer/Human Factors Engineer
Northrop Grumman
Melbourne
Northrop Grumman Aeronautics Systems has an opening for a Human Factors Engineer to join our team of qualified, diverse individuals. This position is located in Melbourne, Florida.
Added 2 hours ago
O
Controls Engineer: Power Generation
OpenAI
Remote, United States
- $177,000 to $285,000 USD / year
We are seeking a Controls Engineer to design and integrate automation systems for on-site power generation serving large AI data center campuses. You will own control architecture and…
Added 2 hours ago
Design Engineer III
Ohiomeansjobs Lake County
Mentor, OH
OhioMeansJobs | Lake County is accepting resumes for the following position: Position: Design Engineer Location: Mentor, OH Hours: Full Time Pay: Based On Experience Position ID: 3276…
Added 2 hours ago
Embedded Hardware Security Research Engineer
Riverside Research Institute
Dayton, OH
Embedded Hardware Security Research Engineer Location US-OH-Dayton ID 2026-4414 Category Research & Development Position Type Full Time Salary Riverside Overview Riverside Research is an…
Added 2 hours ago
A
Project Coordinator
Actalent
Baltimore, MD
- $60,000 to $70,000 USD / year
…EngineerJob DescriptionThe Project Coordinator / Construction Project Engineer supports project leadership by managing the day-to-day administrative and coordination needs of active…
Added 2 hours ago
** Manufacturing Engineer
Dwyer Instruments, Inc.
Sunbury, OH
Supports senior engineers in research, design and development of manufacturing processes including welding schedules, production flow, assembly methods, production equipment and machining.
Added 2 hours ago
TT
Software Engineer, C++ Systems
True Talent Solutions Partners
San Francisco, CA
- $250,000 to $325,000 USD / year
- Research techniques such as GPU oversubscription and checkpointing, and apply them to high-performance systems.
Added 2 hours ago
Sr Software Engineer- Mobile Development
Boyd Gaming
Las Vegas, NV
Performs troubleshooting in the form of problem recognition, research, isolation, resolution and follow-up.
Added 2 hours ago
O
Data Center Controls Engineer (BMS / EPMS)
OpenAI
San Francisco, CA
- $177,000 to $285,000 USD / year
…standards for the large-scale data centers that support OpenAI research, products, and infrastructure…
Added 2 hours ago
Senior Full Stack Engineer
FacilityOS
Annapolis, MD
We are looking for a highly capable Sr. Full Stack Engineer who can ramp up quickly, collaborate effectively with the existing team, and begin contributing meaningful delivery outcomes…
Added 2 hours ago
Senior Software Engineer
FacilityOS
Annapolis, MD
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…
Added 3 hours ago
Software Engineer, Rust
Anduril Industries
Waltham, MA · Broomfield, CO
…mission-critical applications. Our commitment doesn't end with academic research or proof-of-concept experiments; we measure our success by the real-world impact of our deployed solutions.…
Added 3 hours ago
Software Engineer, Rust
Anduril Industries
Broomfield, CO
…mission-critical applications. Our commitment doesn't end with academic research or proof-of-concept experiments; we measure our success by the real-world impact of our deployed solutions.…
Added 3 hours ago
Software Engineer, Robotics Tracking and Fusion
Anduril Industries
Washington, DC · Waltham, MA
…mission-critical applications. Our commitment doesn't end with academic research or proof-of-concept experiments; we measure our success by the real-world impact of our deployed solutions.…
Added 3 hours ago
Software Engineer, Robotics Tracking and Fusion
Anduril Industries
Waltham, MA
…mission-critical applications. Our commitment doesn't end with academic research or proof-of-concept experiments; we measure our success by the real-world impact of our deployed solutions.…
Added 3 hours ago
Software Engineer- Machine Learning
Anduril Industries
Broomfield, CO · Waltham, MA
…mission-critical applications. Our commitment doesn't end with academic research or proof-of-concept experiments; we measure our success by the real-world impact of our deployed solutions.…

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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