Jobs in the United States

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Added 17 mins ago
Sr Advanced Software Engineer - 812
Quantinuum
Broomfield, CO
Added 17 mins ago
Technical Program Manager – Manufacturing Readiness - 817
Quantinuum
Broomfield, CO
Added 1 hour ago
Sr. Materials Data Systems Engineer
Amentum
Huntsville, AL
The Materials Data Systems Engineer provides technical stewardship of the MAPTIS system in support of the engineering community’s access to and use of materials data. Responsibilities…
Added 1 hour ago
Mechanical Engineer Sr - E3
Lockheed Martin
Littleton, CO · Littleton
We are currently seeking a Mechanical Engineer to join our NXGB design team in Littleton, CO. In this role you will :
Added 1 hour ago
Project Engineer Sr Stf - E5
Lockheed Martin
Cape Canaveral, FL · Cape Canaveral
Proficient with desktop software tools to support product development.
Added 1 hour ago
Sr. Software Engineer, Falcon NG-SIEM, FrontTier Expansions (Hybrid)
CrowdStrike, Inc.
Austin, TX
CrowdStrike is seeking a Senior Software Engineer to help design and build the software systems that power our global LogScale/NG-SIEM infrastructure footprint. The FrontTier Expansions…
Added 1 hour ago
Sr. Engineer - Cloud (Remote)
CrowdStrike, Inc.
Remote, United States
…advanced AI-native platform. We work on large scale distributed systems, processing almost 3 trillion events per day and this traffic is growing daily. Our customers span all industries,…
Added 2 hours ago
Sr. Principal System Engineer - NATO IFC Lead
CORP-Corporate Office
United States
Northrop Grumman Aeronautics Systems has an opening for a Senior Principal Systems Engineer to join our team of qualified, diverse individuals within our Systems Engineering organization,…
Added 3 hours ago
Sr Software Engineer (Product Engineering Background)
Jobgether
Remote, United States
…chains through modern, AI-powered infrastructure. As a Senior Software Engineer, you will take ownership of complex product initiatives, drive architectural decisions, and deliver scalable,…
Added 3 hours ago
Sr Consultant, Software Engineering - Forward Deployed Engineering
Nationwide Life and Annuity Insurance Co
OH · AZ · IA
As a Software Engineer, you’ll focus on mentoring and leading others to deliver high-quality, cost-effective technology solutions to business partners by crafting new software applications…
Added 7 hours ago
THIS POSTING IS INTENDED FOR THOSE REGISTERED TO ATTEND THE SOCIETY OF HISPANIC PROFESSIONAL ENGINEERS CONFERENCE, Oct 28 - 31st in Indianapolis, IN
Medtronic
Boston, MA
For Engineer I opportunities, we are looking for a minimum of a Bachelor's Degree, completed by May 2026, with 0+ years of experience.
Added 7 hours ago
Launch Operations Engineer (All levels)
Blue Origin Personnel, LLC
Space Coast, FL
As a Launch Operations Engineer, you will lead the design and implementation of efficient manufacturing and launch systems, ensuring stringent quality control throughout production and…
Added 7 hours ago
Sr. Systems Engineer - Processing, Guidance, & Controls Engineers
RTX Corporation
tucson, AZ
The PG&C Center in Tucson, AZ are currently hiring Sr. Systems Engineer - Processing, Guidance, & Controls Engineers to support the execution of our current and upcoming product lines.…
Added 9 hours ago
Senior Tooling Engineer
Sanders Industries Holdings
San Clemente, CA
IRP MED is seeking a highly motivated Senior Tooling Engineer to support the design, development, and optimization of tooling for Liquid Silicone Rubber (LSR) molded components. This role…
Added 10 hours ago
Sr. Principal System Engineer - NATO IFC Lead
Northrop Grumman
San Diego
Northrop Grumman Aeronautics Systems has an opening for a Senior Principal Systems Engineer to join our team of qualified, diverse individuals within our Systems Engineering organization,…
Added 10 hours ago
Sr Software Engineer- Mobile Development
Boyd Gaming
Las Vegas, NV
Anticipates and mitigates potential attacks to applications, software, services and supporting infrastructure to ensure the security of systems and data.
Added 10 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 10 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 13 hours ago
Senior Site Reliability Engineer
NVIDIA Corporation
North District, IL
Define and implement service-efficiency metrics, and drive improvements through software and hardware optimization, including SR-IOV and DPU capabilities where appropriate.
Added 13 hours ago
Senior AI Engineer and Agentic Platforms - Network Architecture
NVIDIA Corporation
North District, IL
…Architecture group is seeking a talented and motivated Sr. Software Engineer to build the agentic workflows that our architects use in their daily work. The software at the center of this…
Added 17 hours ago
Senior Staff Engineering Program Manager (EPM)
Northrop Grumman
Dulles, VA · McLean, VA
Lead IPT Leads and Subsystem Leads over various disciplines (Systems, Hardware, Software, Integration and Test, Production, etc) through all phases: proposal, design, build, delivery
Added 18 hours ago
Technology Consulting - TMT - Forward Deployed Engineer - Sr Manager
EY
Chicago, IL · Houston, TX · Miami, FL · New York, NY · San Antonio, TX · San Francisco, CA · Dallas, TX
As a Senior Manager and Forward Deployed Engineer (FDE), you will help establish and lead our FDE capability. An FDE combines four disciplines in one role: software engineering, deep AI and…
Added 19 hours ago
Sr. Staff Software Engineer, Cribl Dete
CRIBL INC
MADISON, WI
Added 19 hours ago
Sr Software Engineer L3 - TS/SCI Poly required
EMTAK LLC
Annapolis Junction, MD
…mission-focused engineering team supporting customer applications and systems. The ideal candidate will have strong Java development and Linux skills, experience with modern development…
Added 20 hours ago
Sr. Applications Engineer - FIB/PFIB
ThermoFisher Scientific
Fremont, CA
Proficiency with relevant software platforms and data management systems

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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