Jobs in the United States

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Added 7 mins ago
Principal Systems Engineer - Processing, Guidance, & Controls Engineers t
RTX Corporation
tucson, AZ
Active and transferable U.S. government issued security clearance is required prior to start date.
Added 7 mins ago
Sr. Systems Engineer - Processing, Guidance, & Controls Engineers
RTX Corporation
tucson, AZ
Active and transferable U.S. government issued security clearance is required prior to start date.
Added 7 mins ago
Systems Engineer II - Processing, Guidance, & Controls Engineers
RTX Corporation
tucson, AZ
Active and transferable U.S. government issued security clearance is required prior to start date.
Added 7 mins ago
AE
Campus Graduate Masters Summer Internship Program - 2027 AI Engineer, Enterprise Technology Services- Phoenix, AZ
American Express
Phoenix, AZ
- $24.05 to $63 USD / hour
At American Express, we empower future technologists to learn, innovate, and make an impact from day one. As an AI Engineer Intern in Enterprise Technology Services, you’ll join a 10-week…
Added 7 mins ago
AE
Campus Graduate Masters Summer Internship Program - 2027 Software Engineer, Enterprise Technology Services- Phoenix, AZ
American Express
Phoenix, AZ
- $24.05 to $63 USD / hour
At American Express, we empower future technologists to learn, innovate, and make an impact from day one. As a Software Engineer Intern, you’ll join a 10-week Summer Internship Program and…
Added 7 mins ago
AE
Campus Undergraduate Full-Time Engineer - 2027 AI Engineer I, Enterprise Technology Services- Phoenix, AZ
American Express
Phoenix, AZ
- $78,000 to $124,750 USD / year
- Full-time
…integrations, AI agents, agentic workflows, and AI-enabled software features. You’ll collaborate with engineering, product, data, security, risk, and business partners to help deliver…
Added 7 mins ago
Application Engineer - DevOps & Engineering Tools
RTX Corporation
phoenix, AZ
We are seeking an experienced Application Engineer - DevOps & Engineering Tools to join our agile team! In this role you will deploy, administer, and support new and existing…
Added 18 mins ago
Senior PostgreSQL Database Engineer
Valiant Solutions, LLC
St. Louis, MO
The Senior PostgreSQL Database Engineer will join a program providing User-facing and Data Center Services supporting an Intelligence Community customer. The team will work together to…
Added 40 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
Designs, develops, troubleshoots and debugs software and integration solutions across enterprise platforms. Architects the integration of third-party products into a unified operations…
Added 48 mins ago
Senior VDI Engineer
Valiant Solutions, LLC
St. Louis, MO
The Senior VDI Engineer will join a program providing User-facing and Data Center Services supporting an Intelligence Community customer. The team will work together to support innovative…
Added 48 mins ago
VTOC Operations Engineer
Valiant Solutions, LLC
St. Louis, MO
The VTOC Operations Engineer will join a program providing User-facing and Data Center Services supporting an Intelligence Community customer. The team will work together to support…
Added 48 mins ago
Citrix Software Virtualization Engineer
Valiant Solutions, LLC
Springfield, VA · St. Louis, MO
The Citrix Software Virtualization Engineer will join a program providing User Facing and Data Center Services supporting an Intelligence Community customer. All the personnel on the team…
Added 48 mins ago
Network Engineer
Valiant Solutions, LLC
Springfield, VA, VA
The Network Engineer will join a program providing Network and Cybersecurity services supporting an Intelligence Community customer. The team will work together to support transport and…
Added 48 mins ago
IEC Engineer
Valiant Solutions, LLC
Springfield, VA, VA
The IEC Engineer will join a program providing User Facing and Data Center Services supporting an Intelligence Community customer. The team will work together to support innovative design,…
Added 49 mins ago
Forward Deployed Engineer
Armadin
Palo Alto, CA
At Armadin, we're a group of engineers, researchers, and security researchers on a mission to redefine what proactive security can do in the AI era. Cyberattacks are becoming autonomous and…
Added 1 hour ago
Senior Integration Engineer – AI - Tax And Audit AI
Thomson Reuters (Tax & Accounting) Inc
Brooklyn, NY · Frisco, TX · Chicago, IL · Ann Arbor, MI · Eagan, MN
Help bring AI into the systems tax and audit professionals rely on every day. As a Senior Integration Engineer, you will connect AI solutions with Thomson Reuters products and client…
Added 1 hour ago
Network Engineer
Valiant Solutions, LLC
Lorton, VA
The Network Engineer will support an Intelligence Community Customer in Lorton, VA. As a Network Engineer, you will play a crucial role in designing, implementing, and maintaining the…
Added 1 hour ago
Lead Firewall Engineer
Valiant Solutions, LLC
Springfield, VA, VA
The Lead Firewall Engineer will join a program providing Network and Cybersecurity services supporting an Intelligence Community customer. The team will work together to support transport…
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
The Cybersecurity Implementation Engineer will join a program providing Network and Cybersecurity services supporting an Intelligence Community customer. The team will support transport and…
Added 1 hour ago
Cyber Data Analysis Engineer
Valiant Solutions, LLC
Springfield, VA
The Cyber Data Analysis Engineer will join a program providing Network and Cybersecurity services supporting an Intelligence Community customer. The team will support transport and…
Added 1 hour ago
Software Development Engineer
Texas Instruments
Dallas, TX
The software development engineer is responsible for the development of ROM code, low-level device drivers ( both bare-metal & RTOS based), tool-chain support, SDK development & custom…
Added 2 hours ago
Systems Test Engineer II
Hewlett Packard Enterprise
Spring, TX
You are a hands-on systems engineer who enjoys solving complex integration problems across hardware, software, firmware, operating systems, networking, and storage.
Added 2 hours ago
Manager Electrical Engineering 2
Northrop Grumman
Redondo Beach
Understands both electrical circuits and software within the flight hardware and EGSE
Added 2 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,…

FacilityOS

Senior Full Stack Engineer

Annapolis, MD, United States

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Job details

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. Full Stack 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#.
Minimum 5 years of experience developing web applications using Angular and Typescript
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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