Principal Software Engineer

Alarm.com; Tysons (VA); On-site; USD 130,000 - 170,000; Full time

Job summary

Alarm.com is seeking a Principal Software Engineer to lead architecture and engineering for the emPower team, focusing on IoT and smart home automation. This role is integral in transforming technical needs into reliable software systems, requiring strong leadership and extensive software experience.

The ideal candidate has over 15 years of experience in software development, particularly in object-oriented programming with C#/.NET, and is adept in collaborating across teams to optimize product capabilities. Strong analytical and mentoring skills are vital.

Qualifications

• 15+ years of professional software development experience.
• Proven experience designing and delivering complex software systems.
• Strong ability to influence technical direction across teams.

Responsibilities

• Provide hands-on technical leadership across IoT device control.
• Lead software architecture and design for major components.
• Drive cross-team collaboration and execution across technical domains.

Skills

Object-oriented programming skills

C#/.NET experience

Analytical skills

Technical leadership

Mentoring engineers

Education

Bachelor’s degree in Computer Science or related field

Job description

Do you love working with connected devices, automation, and real‑world systems? Have you automated your own home, built integrations across smart devices, or thought deeply about how cloud software should control physical systems reliably?

Alarm.com is looking for a versatile Principal Software Engineer to help lead architecture and engineering for our emPower team, which builds software for IoT, smart home automation, energy management, HVAC, water, and connected‑device control experiences. This role is an IC role that sits at the intersection of cloud services, physical devices, mobile and web applications, automation logic, data processing, and customer‑facing product experiences.

As a Principal Software Engineer, you will provide hands‑on technical leadership across teams. You will help define architecture, guide major design decisions, mentor engineers, and lead the evolution of systems that must be reliable, scalable, maintainable, and adaptable as our connected‑device platform continues to grow.

What You’ll Do

As a Principal Software Engineer on the emPower team, you will help design and evolve systems that coordinate physical devices, cloud services, mobile and web applications, automation engines, partner integrations, and data pipelines. You will work across product, firmware, platform, operations, and application engineering teams to turn ambiguous business and technical needs into reliable, scalable, and maintainable software systems.

You will be expected to lead through technical depth, sound judgment, and influence. You will own important architecture decisions, guide implementation strategy, and help engineers across multiple teams build better systems.

Day‑to‑Day Responsibilities

• Provide hands‑on technical leadership for systems spanning IoT device control, smart home automation, energy, HVAC, water, and connected‑device experiences.
• Lead architecture and design for major software components, services, APIs, data flows, and integration patterns.
• Help evolve existing monolithic systems into more modular, scalable, reliable, and maintainable systems.
• Partner with product, firmware, platform, operations, and application teams to turn ambiguous needs into clear technical direction.
• Mentor engineers at multiple levels and help raise the technical bar through design reviews, code reviews, technical guidance, and reusable patterns.
• Drive cross‑team collaboration and execution across multiple technical domains.
• Evaluate new technologies, frameworks, and methodologies where they can materially improve product capabilities or engineering outcomes.
• Reason across the full product stack, including backend services, databases, APIs, web and mobile experiences, device integrations, automation logic, and operational tooling.
• Be an expert on system architecture, functionality, data flows, operational processes, and the tools needed to operate production systems effectively.
• Provide technical thought leadership for major software components, systems, and features, earning alignment and driving adoption across teams.
• Exercise strong engineering judgment: know when to move quickly, when to invest in a robust platform capability, and when to avoid unnecessary complexity.
• Bring your ideas. We want our engineers to collaborate on product development, not blindly build to a spec.
• Other duties as assigned.

What You Need

• Bachelor’s degree in Computer Science, Computer Engineering, a related field, or equivalent professional experience.
• 15+ years of professional software development experience.
• Proven experience designing, building, and delivering complex software systems.
• Strong object‑oriented programming skills; experience with C#/.NET or a similar object‑oriented language is required; direct C# and .NET experience would be a major plus.
• Experience leading technical direction across teams and influencing architecture beyond a single project or codebase.
• Experience mentoring engineers and helping develop people, practices, and reusable technical solutions.
• Ability to select appropriate frameworks, architecture patterns, and technical approaches, then educate teams and drive adoption.
• Strong analytical skills and a practical problem‑solving mindset.
• Ability to lead and influence across teams without relying solely on reporting authority.
• Ability to reason across the full product stack, including backend services, data stores, APIs, device integrations, and web/mobile user experiences.
• Strong understanding of object‑oriented design, software development lifecycles, and long‑term maintainability concerns.
• Excellent communication skills, including the ability to explain technical tradeoffs to engineers, product owners, and business stakeholders.

Experience That Would Be a Major Plus

• Experience with IoT, smart home, energy management, HVAC, water, automation, or connected‑device systems.
• Experience working with physical systems, hardware devices, firmware teams, or embedded‐device integrations.
• Experience with event‑driven systems, device telemetry, automation/rules engines, or distributed systems.
• Experience in modernizing monolithic systems or decomposing systems into modular services.
• Experience designing systems where cloud software interacts with deployed physical devices and must account for latency, reliability, compatibility, and operational visibility.

Why This Role Matters

The emPower team works on software that connects the digital and physical world: devices, homes, energy systems, water systems, HVAC systems, automation logic, and customer‑facing control experiences. The systems we build must be reliable, understandable, scalable, and adaptable as new devices, integrations, and product capabilities are added.

As a Principal Software Engineer, you will help shape the architecture behind these experiences. Your work will influence multiple teams, improve the systems engineers build on, and help Alarm.com continue delivering connected‑device products that are useful, reliable, and easy for customers to trust.

Please note that sponsorship of new applicants for employment authorization, or any other immigration‑related support, is not available for this position at this time.