Jobs in the United States

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Added 1 min ago
Ports & Marine Delivery Leader - West Coast
Arcadis
Los Angeles
Arcadis is the world's leading company delivering sustainable design, engineering, and consultancy solutions for natural and built assets.
Added 1 min ago
Ports & Marine Delivery Leader - Mid-Atlantic/Northeast
Arcadis
Philadelphia
Arcadis is the world's leading company delivering sustainable design, engineering, and consultancy solutions for natural and built assets.
Added 4 mins ago
DevOps Architect
Jobgether
Remote, United States
Nice to have: AWS Certified Solutions Architect – Professional or AWS Certified DevOps Engineer – Professional.
Added 4 mins ago
Principle SecOps & Observability Engineer, (Clearance Secret or Top Secret) CO, AL, OK, TX
HPE
Ft. Collins, CO · Montgomery, AL · Oklahoma City, OK · Spring, TX
Designs, develops, troubleshoots and debugs software and integration solutions across enterprise platforms. Architects the integration of third-party products into a unified operations…
Added 10 mins ago
AF
Injection Stretch Blow Molding Process Engineer
Amcor Flexibles, LLC
Shelbyville, KY
- $7.25 USD / hour
At Amcor, we unpack possibility through our innovative and responsible packaging to provide solutions that benefit our customers, our people and our planet. More than 10,000 consumers…
Added 16 mins 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 16 mins ago
Senior Tax & Audit AI Engineer, FDE
Thomson Reuters (Tax & Accounting) Inc
Brooklyn, NY · Frisco, TX · Chicago, IL · Ann Arbor, MI · Eagan, MN
Help tax and audit professionals turn real business challenges into reliable AI solutions. In this hands-on role, you will combine tax or audit expertise with AI tools to build automations,…
Added 20 mins ago
Solutions Engineer
Baselayer
NY
…real-world problems. You're energized by helping customers implement solutions that drive measurable business…
Added 24 mins ago
Network Engineer
Valiant Solutions, LLC
Lorton, VA
Valiant Solutions is seeking a Network Engineer to join our rapidly growing and innovative team!
Added 24 mins ago
Lead Firewall Engineer
Valiant Solutions, LLC
Springfield, VA, VA
Valiant Solutions is seeking a Lead Firewall Engineer to join our rapidly growing and innovative team!
Added 24 mins 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 24 mins 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 24 mins ago
Cyber Data Analysis Engineer
Valiant Solutions, LLC
Springfield, VA
Valiant Solutions is seeking a Cyber Data Analysis Engineer to join our rapidly growing and innovative team!
Added 28 mins 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 42 mins ago
Associate Environmental Compliance and Sustainability Engineer - NH, MA
Extreme Networks, Inc.
United States
Over 50,000 customers globally trust our end-to-end, cloud-driven networking solutions. They rely on our top-rated services and support to accelerate their digital transformation efforts…
Added 43 mins ago
H
Software Systems Engineer - GitHub Enterprise
HP
Vancouver
- $105,050 to $161,800 USD / year
…ensure the successful development and deployment of software solutions that address a wide range of challenges and requirements. The role optimizes software systems for enhanced…
Added 46 mins ago
TT
Founding Senior Engineer
True Talent Solutions Partners
New York, NY
- $175,000 to $225,000 USD / year
Join an early-stage AI company building growth tools for consumer brands. As the second engineer, you will build core product systems hands-on while shaping the engineering culture and…
Added 46 mins ago
TT
Forward Deployed Engineer
True Talent Solutions Partners
San Francisco, CA
- $165,000 to $250,000 USD / year
Added 51 mins ago
TM
Software Engineer
Triangle Manufacturing
Upper Saddle River, NJ
- $80,000 USD / year
Providing Engineering and Manufacturing solutions since 1955, Triangle specializes in precision engineering and manufacturing of highly complex, tight-tolerance machined parts and…
Added 53 mins ago
Electrical Design Engineer III
Omaha Public Power District
Omaha, NE
…utilities, we invest in critical infrastructure and innovative solutions that strengthen reliability across our generation fleet and the communities that depend on…
Added 53 mins ago
Senior Electrical Design Engineer
Omaha Public Power District
Omaha, NE
As a Senior Electrical Design Engineer, you will provide technical leadership for major capital projects and strategic generation fleet modernization initiatives. This role serves as a…
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 1 hour ago
AS
IT - Systems Engineer
Apex Systems LLC
Denver, CO
- $70 to $75 USD / hour
This is not a standard SailPoint administrator role. We’re looking for someone who can engineer, integrate, automate, and troubleshoot identity solutions supporting AI agents, service…
Added 1 hour ago
AS
Manufacturing Engineer-SEC
Apex Systems LLC
Littleton, CO
- $30 to $40 USD / hour
Leverage factory data to develop statistical process control approaches and integrate reporting solutions.
Added 1 hour ago
PC
Sales Engineer
Pacific Coast Trane
Sunnyvale, CA
- $90,000 to $120,000 USD / year
We are currently seeking a Sales Engineer to join our Service Sales team in Sunnyvale, CA.

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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