Jobs in the United States

25+ jobs

Save this search

Added just now
Vice President, Product and Solutions Engineering
Zeta
Remote, United States
…architecture, proofs, and defending the design through architecture, security, and procurement…
Added 2 mins ago
Senior Systems Security Engineer
KBR
Beavercreek, OH
…and advancing some of the world's highest-priority national security and space…
Added 5 mins ago
AI
Defensive Cyber Engineer
Allyon, Inc.
Aurora, CO
- $130,000 to $145,000 USD / year
This Defensive Cyber Engineer role matters because it strengthens the United States Air and Space Force's ability to defend critical systems against advanced cyber threats. By leading…
Added 5 mins ago
NI
Electrical Engineer
NLIGHT Inc
Longmont, CO
- $31,533 USD / year
Experience: 2-5 years of experience as an Electrical Engineer
Added 5 mins ago
NI
Electrical Quality Engineer
NLIGHT Inc
Longmont, CO
- $31,533 USD / year
The Electrical Quality Engineer ensures quality and reliability across printed circuit board (PCB) assemblies, cable harnesses, and photonic subsystems. The successful candidate will apply…
Added 5 mins ago
GD
Senior Principal Software Systems Engineer
General Dynamics Mis
Boulder, CO
- $183,381 to $193,409 USD / year
As a Senior Principal Software Systems Engineer, you will provide architectural recommendations and design inputs to a cross functional team that develops complex software systems that…
Added 5 mins ago
NI
Sr. Electro-Optical Engineer
NLIGHT Inc
Longmont, CO
- $31,533 USD / year
Electro-Optical (EO) Engineers at nLIGHT DEFENSE Systems, Inc. are the engine of execution. As a Senior EO Engineer, you are expected to serve as a technical authority and execution leader,…
Added 5 mins ago
BH
Network Engineer 1
Beacon Hill Solution
Englewood, CO
- $30 to $40 USD / hour
…working through a significant backlog of firmware updates tied to security vulnerabilities, so this individual will help validate new firmware releases and get critical updates deployed…
Added 5 mins ago
NI
Mechanical Quality Engineer
NLIGHT Inc
Longmont, CO
- $31,533 USD / year
Added 5 mins ago
BA
University - 2027 Summer Games Systems Engineer Intern - Colorado Springs, CO
Booz Allen Hamilton
Colorado Springs, CO
- $52,900 to $108,000 USD / year
Applicants selected will be subject to a security investigation and may need to meet eligibility requirements for access to classified information
Added 15 mins ago
Senior Project Engineer
Geosyntec Consultants, Inc.
Los Alamos, NM
…complex for more than 30 years. We contribute to DOE’s nuclear security and environmental remediation enterprise by providing the highest-caliber staff and experts. We are seeking a…
Added 16 mins ago
Database Engineer - Entry Level
Boeing Intelligence & Analytics, Inc. (BIA)
MD - Annapolis Junction, MD
As a Database Engineer - Entry level at Boeing Intelligence and Analytics, you responsibilities will include:
Added 20 mins ago
Senior Infrastructure Engineer
Hellyeah AI
San Francisco, CA
We are looking for a Senior Infrastructure Engineer to build the reliable, scalable foundation behind our AI workflows, advertising operations, and data systems.
Added 26 mins ago
Oracle Database Engineer
BOOZ, ALLEN & HAMILTON, INC.
North Charleston, SC
…mind as you implement policies and procedures to ensure the security and integrity of the database. You'll use technology and tools like Oracle Enterprise Manager to identify problem areas…
Added 37 mins ago
Software Development Engineer II, Managed Operations (MO)
Amazon Development Center U.S., Inc.
Seattle, WA
We are in search of an experienced Software Engineer to develop products for our customers to enable AWS to expand its global footprint. Developers at Amazon work on real world problems on…
Added 42 mins ago
Electrical Engineer
Forrest Johnson
Knoxville, TN
…in Europe and Asia as well as research reactors and national security installations to ensure systems perform safely, reliably, and in full compliance with regulatory…
Added 42 mins ago
Sales Engineer
Forrest Johnson
Knoxville, TN
…in Europe and Asia as well as research reactors and national security installations to ensure systems perform safely, reliably, and in full compliance with regulatory…
Added 42 mins ago
Cost Engineer
Turner Industries Group, LLC
Commerce City, CO
COST ENGINEER General Job Description: This position will perform non-routine cost/estimating assignments, which require the selection and application of resource monitoring and control…
Added 42 mins ago
Scheduler
Turner Industries Group, LLC
Commerce City, CO
…from construction or maintenance to system turnover. • Monitor Engineer Work Package (EWP), Procurement Work Package (PWP), and Installation Work Package (IWP) performance as required. •…
Added 42 mins ago
HMI Technical Lead Engineer
GE Vernova
Longmont, CO
…of visualization software, industrial communication, cyber security and control systems as well as exhibits strong project management and communication…
Added 42 mins ago
FTS Network Services - Network Product Engineer
Fiserv
Greenwood Village, CO
You will engineer, implement, automate, validate, and optimize complex enterprise network infrastructure and network services. You will work across data center, campus, WAN, security,…
Added 42 mins ago
Sr Advanced Software Engineer - 812
Quantinuum
Broomfield, CO
Added 42 mins ago
Technical Program Manager – Manufacturing Readiness - 817
Quantinuum
Broomfield, CO
Added 42 mins ago
T
Tools And Automation Engineer
TEKsystems
Broomfield, CO
- $138,700 to $190,700 USD / year
…and data analytics solutions, is seeking a Tools & Automation Engineer to support the development, production, and testing of advanced GPS receiver technology. This role sits within a team…
Added 42 mins ago
C
Software Engineer Full Stack / Backend II (Full-Time) - United States
Cisco
Boulder, CO
- Full-time
As a Software Engineer at Cisco, you will design and build software solutions that power Cisco's products and platforms. You will work end-to-end on everything from APIs and backend…

FacilityOS

Senior Software Engineer

Annapolis, MD, United States

Apply About employer

Applications open in a new tab.

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.

Apply About employer

Report this job