Senior Applications Engineer

Simplesense keeps military installations mission-ready. The infrastructure their operations depend on — power, water, fuel, facilities, security, and communications — runs continuously, often under strain. When it fails without warning, mission readiness is at risk, and the people who run these installations need to see what’s happening in time to act. That’s the foundation of Continuous Mission Assurance.

We securely integrate Operational Technology and Control Systems (OT/CS) from the building edge to the cloud, applying Zero Trust principles to protect critical infrastructure from cyber and physical threats. By unlocking previously siloed data, we put timely awareness in front of the decision-makers who need it. As prime on the Air Force’s Installation Resilience Operations Command and Control (IROC) program, we hold a continuous Authority to Operate (ATO) and have proven the capability at scale at Tyndall Air Force Base. That work is now expanding across the Air Force, Space Force, and Army.

Our team pairs over a century of boots-on-the-ground mission experience with deep technical expertise across DevSecOps, cybersecurity, and cloud infrastructure. We engineer resilient infrastructure — the software, integration, and operational backbone behind it — for the operators who depend on it in the field. Persistent resilience, built for the mission.

As the Senior Applications Engineer, you will build containerized ETL applications deployed and orchestrated in Kubernetes. This isn't a one-size-fits-all integration problem: each source system has its own quirks, protocols, and failure modes, and you will figure out reliable extraction strategies and pair it with efficient data translation methods.

• →Experience: 5+ years of software engineering experience with a strong focus on backend data pipelines, ETL architecture, and API  integrations.

• Expert-level proficiency in NodeJS building production applications using async patterns, error handling, testing (unit/integration), and package management.
• Comfort working with multiple communication protocols such as REST APIs, MQTT, WebSockets, and low-level TCP socket programming. BACnet experience is a strong plus.
• Experience with containerization and container image best practices.
• Experience with relational databases (Postgres preferred) and experience designing or working with data pipelines.
• Experience deploying, configuring, and troubleshooting containerized applications in a K8s environment (deployments, services, config maps/secrets, health checks, resource management).
• Experience authoring and maintaining CloudFormation templates for provisioning AWS resources in a repeatable, automated way.
• Domain Knowledge: Familiarity with building management systems (BMS) and industrial control system architectures, including an understanding of how operational technology data is structured, generated, and communicated across these systems.

• Strongly prefer candidates residing in the Denver, CO metro area.
• Prior experience working within DoD, Air Force, Space Force, or fast-paced Federal contractor/dual-use startup environments.
• Relevant technical certifications such as AWS Certified Security - Specialty, GIAC GICSP/GRID, or CISSP.
• Experience with Operational Technology (OT), ICS/SCADA environments, OT/CS security tooling (e.g., Nozomi), automating DISA STIG/NIST 800-53 frameworks, and familiarity with DoD Zero Trust strategy.

• 30 Days: You are fully onboarded to our architecture and have shipped a small, well-tested improvement to an existing ETL integration, demonstrating comprehension of our NodeJS patterns and deployment process.
• 60 Days: You have independently built and deployed a new ETL application for an additional system integration, from protocol investigation through Kubernetes deployment, and proposed at least one improvement to our shared tooling or patterns.
• 90 Days: You are a major contributor to our ETL application portfolio, actively shaping architectural decisions about scaling the framework, and have a complete understanding of our CI/CD pipeline. You understand the user problems our pipelines solve, ensuring the data being delivered is accurate, timely, and useful to the teams and tools depending on it.

1. Find Your Fit: Your journey starts here. Explore and apply to our open positions to find the right role for your skills.
2. Initial Chat: A brief call with our recruiting team to learn about your background and answer your initial questions about Simplesense.
3. Values & Vision: A conversation with a hiring manager to discuss how your aspirations align with our mission and goals of the team.
4. Show Your Skills: Complete a technical assessment that reflects the work you’d be doing.
5. Team Interview: Interview with the team to discuss your experience and see if we’re a great match.
6. Final Handshake: A final conversation to ensure we’ve answered all your questions before making a decision.
7. Welcome to Simplesense!

Simplesense is an equal opportunity employer committed to a policy of merit-based employment. All employment decisions—including recruitment, hiring, promotion, compensation, benefits, training, and termination—are made based on individual qualifications, performance, and business needs. We strictly prohibit discrimination or harassment of any kind on the basis of protected characteristics as recognized by federal, state, or local law. As a U.S. government contractor, Simplesense complies with all applicable equal employment opportunity laws, Section 503 of the Rehabilitation Act, and the Vietnam Era Veterans Readjustment Assistance Act (VEVRAA). If you need a reasonable accommodation to complete the application or take part in the interview process, please contact People Operations at careers@simplesense.io.