Annapolis, Maryland, United States · Hybrid
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 …
Skills: .NET Framework, .NET Core, C#, Strangler Fig Pattern, Object-Oriented Programming
Annapolis, Maryland, United States · Hybrid
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 …
Skills: C#, .NET Framework, .NET Core, Backend Engineering, RESTful Services
Annapolis, Maryland, United States · Hybrid
$125k–$145k/yr
The Salesforce Developer position will work within a team of Salesforce Developers, Salesforce Admins, Configuration Managers, and various organizational units. This position will be responsible for the technical aspects…
Skills: Salesforce Development, Apex, Visualforce, Salesforce Architecture, API Integration
Annapolis, Maryland, United States · On-site
$130k–$160k/yr
Amentum is seeking a System Administrator 1 to provide Tier 1 (Help Desk) and Tier 2 (Escalation) problem identification, diagnosis and resolution of problems. Provides support for the escalation and communication of sta…
Skills: Tier 1 Support, Tier 2 Support, Windows OS, Linux OS, UNIX
Annapolis, Maryland, United States · Remote Solely
$85k–$117k/yr
Syms Strategic Group (SSG) is seeking a talented Senior Systems Engineer (Angular) Location: Remote Department: Veterans Affairs (VA) Type: Full Time Min. Experience: Experienced Security Clearance Level: Public Trust Sa…
Skills: Angular, NodeJS, Java, RESTful APIs, AWS
Annapolis, Maryland, United States · On-site
$99k–$148k/yr
RELOCATION ASSISTANCE: No relocation assistance available CLEARANCE REQUIRED FOR START: No CLEARANCE TYPE: None TRAVEL: Yes, 10% of the TimeDescription At Northrop Grumman, our employees have incredible opportunities to …
Skills: Quality Assurance, Root Cause Analysis, Statistical Analysis, GD&T, FMEA
Northrop Grumman Mission Systems, Inc.Annapolis, Maryland, United States · On-site
$99k–$148k/yr
RELOCATION ASSISTANCE: No relocation assistance available CLEARANCE REQUIRED FOR START: No CLEARANCE TYPE: None TRAVEL: Yes, 10% of the TimeDescription At Northrop Grumman, our employees have incredible opportunities to …
Skills: Quality Assurance, Root Cause Analysis, Statistical Analysis, GD&T, FMEA
Annapolis, Maryland, United States · On-site
$88k–$163k/yr
RELOCATION ASSISTANCE: Relocation assistance may be available CLEARANCE REQUIRED FOR START: Yes CLEARANCE TYPE: Secret TRAVEL: Yes, 10% of the TimeDescription At Northrop Grumman, our employees have incredible opportunit…
Skills: Acoustic Analysis, Simulation Modeling, Modal Analysis, Vibration Analysis, Frequency Response Analysis
Northrop Grumman Mission Systems, Inc.Annapolis, Maryland, United States · On-site
$88k–$163k/yr
RELOCATION ASSISTANCE: Relocation assistance may be available CLEARANCE REQUIRED FOR START: Yes CLEARANCE TYPE: Secret TRAVEL: Yes, 10% of the TimeDescription At Northrop Grumman, our employees have incredible opportunit…
Skills: Acoustic Analysis, Simulation Modeling, Modal Analysis, Vibration Analysis, Direct Frequency Response
Annapolis, Maryland, United States · Hybrid
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 …
Skills: Manual Testing, Requirements Analysis, Test Documentation, Bug Tracking, Regression Testing
Dover, England, United Kingdom · On-site
Overview MasTec Professional Services provides end-to-end engineering, design, and integrated services to the power, oil & gas pipeline, and gas distribution industries across the country. With a genesis in construction …
Skills: Gas Engineering, AutoCAD, Underground Piping Design, Constructability Reviews, Bill Of Materials
Annapolis, Maryland, United States · On-site
Overview Accepting Applications for Hourly Hotel Positions. Explore opportunities in the following areas: Engineering Food and Beverage Front Office Housekeeping About Us HHM Hotels is proud to be an equal-opportunity em…
Skills: Hotel Operations, Engineering, Food and Beverage Service, Front Office Management, Housekeeping
Annapolis, Maryland, United States · On-site
$96k–$182k/yr
Date Posted: 2026-06-23 Country: United States of America Location: US-MD-ANNAPOLIS-905 ~ 2551 Riva Rd ~ BLDG 905 Position Role Type: Onsite U.S. Citizen, U.S. Person, or Immigration Status Requirements: The company will…
Skills: Swift, Objective-C, iOS Development, Xcode, Core Data
Annapolis, Maryland, United States · On-site
Overview Accepting Applications for Hourly Hotel Positions. Explore opportunities in the following areas: Engineering Food and Beverage Front Office Housekeeping About Us The Chesapeake’s charm shines in Annapolis, Maryl…
Skills: Hotel Operations, Engineering, Food and Beverage Service, Front Office Management, Housekeeping
Annapolis, Maryland, United States · On-site
$60k–$114k/yr
Date Posted: 2026-06-23 Country: United States of America Location: US-MD-ANNAPOLIS-904 ~ 2551 Riva Rd ~ BLDG 904 Position Role Type: Onsite U.S. Citizen, U.S. Person, or Immigration Status Requirements: U.S. citizenship…
Skills: Aircraft Dispatch, Flight Planning, Air Traffic Control, Meteorology, Aviation Operations
Annapolis, Maryland, United States · On-site
$158k–$164k/yr
Amentum is seeking an ISSO 2 to provide support for a program, organization, system, or enclave’s information assurance program. Essential Responsibilities: Provides support for proposing, coordinating, implementing, and…
Skills: Information Assurance, Security Policy Enforcement, Vulnerability Assessment, Risk Assessment, Configuration Management
Annapolis, Maryland, United States · On-site
$150k–$180k/yr
Amentum is seeking a System Administrator 2 to provide Tier 1 (Help Desk) and Tier 2 (Escalation) problem identification, diagnosis and resolution of problems. Provides support for the escalation and communication of sta…
Skills: PKI Tools, Windows Desktop Tools, Linux Command Line, Troubleshooting, Ticket Support
Annapolis, Maryland, United States · On-site
$175k–$215k/yr
Amentum is seeking a System Administrator 3 to provide Tier 1 (Help Desk) and Tier 2 (Escalation) problem identification, diagnosis and resolution of problems. Provides support for the escalation and communication of sta…
Skills: Tier 1 Help Desk, Tier 2 Escalation, UNIX, Windows Operating Systems, Linux
Annapolis, Maryland, United States · On-site
$65k–$85k/yr
General Summary The Quality Control Inspector ensures that all Firm-Fixed-Price (FFP) work under IDIQ contracts comply with the specified quality standards, contract requirements, and applicable codes. The inspector is r…
Skills: Quality Control Inspection, Three-Phase Inspection, Construction Methods, QC Reporting, Contract Compliance
Annapolis, Maryland, United States · On-site
$125k–$200k/yr
Your Day: CSR qualifies and books your service calls.Dedicated dispatch confirms and sends you out.Troubleshoot, present options, books jobs, build the work order, & done.Warehouse (ran by a Journeyman) handles materials…
Skills: Residential Electrical Service, Customer Rapport, Service Call Management, Work Order Creation, Electrical Installation
Sign up with Clera and we'll reach out the moment a role actually fits you — no more spraying applications into the void.
Design, develop, and maintain backend web applications and services while modernizing legacy systems using incremental approaches. Collaborate with engineering leads and stakeholders to ensure scalable, testable solutions and high code-quality standards.
Requires a minimum of 8 years of experience in C# and .NET development with a strong background in legacy system modernization. Candidates must be proficient in SQL Server, RESTful services, and clean architecture principles.
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 8 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.
Proven experience applying the Strangler Fig pattern or similar modernization approaches to gradually replace or refactor legacy systems.
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 designing and building cloud-native SaaS and PaaS applications.
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.
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
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 Canada or United States.
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.
SCLogic is now FacilityOS! Follow us on our company page: https://www.linkedin.com/company/facilityos-facility-management FacilityOS is a global leader in facility, asset, and visitor management. The company’s modular platform is used by security professionals, facility managers, compliance teams, logistics managers, and operational leadership to optimize and automate key facility processes, achieve regulatory compliance, enforce safety protocols, and drive site security requirements. Their end-to-end platform is comprised of interoperable modules for visitor management (VisitorOS), emergency and evacuation management (EmergencyOS), contractor compliance management (ContractorOS), asset and logistics management (LogisticsOS), and physical visitor and contractor access control (SecurityOS).
Offices: 275 West Street, Suite 400, Annapolis, MD 21401, US
Based on 102 listings with disclosed salaries, most engineering jobs in Annapolis, MD pay between $66k–$196k per year. Individual offers vary with seniority, company size, and specialization.
There are currently 125 open engineering positions in Annapolis, MD listed on Clera. New openings are added daily as companies post roles.
Companies currently hiring include Northrop Grumman, Northrop Grumman Mission Systems, Inc., Dynamic Engineering Consultants, PC, New Energy Equity, Akima Global Services, LLC, among others. Browse the listings above to see every active employer.
Yes — 22 of the 125 open engineering positions offer remote or hybrid work (5 remote, 17 hybrid).
Each listing links directly to the employer's application page. Apply early — fresh listings get the most recruiter attention in the first two weeks.
