Simplesense builds, deploys, and sustains the Installation Resilience Platform that enables mission operators to rapidly adapt and respond. The Platform protects critical infrastructure from cyber attack while unlocking previously siloed information to monitor, diagnose, and improve response times to incidents.

Our adversaries rapidly adopt the latest technology: we help defense users respond in kind. Simplesense is a non-traditional defense contractor and prime on the Air Force’s Installation Resilience Operations Command and Control (IROC) program, which is now expanding to five additional Air Force, Space Force, and Army installations from the one prototype installation, Tyndall Air Force Base. Our team combines over 100 years of direct mission experience solving hard problems with 50 years technical expertise deploying DevSecOps, cybersecurity, and cloud infrastructure, giving us a deep appreciation for our customers’ mission and end users’ priorities.

We build for scale, architecting and prioritizing technical work for long term sustainability.

Senior Applications Engineer Location: We prioritize candidates who reside in the Denver, CO metro area (hybrid as needed) but we are open to exceptional remote talent.

Department: Engineering 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.

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. 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.

Work Model:



We prioritize candidates who reside in the Denver, CO (hybrid as needed) but we are open to exceptional remote talent.

Locals: Onsite as needed for collaborative workspace time.

Remote: Quarterly travel to hub locations for team syncs and alignment.

Our Performance Culture

We measure performance across two key dimensions: We look for builders who can comfortably navigate ambiguity and are deeply driven by our shared national security mission.

People

Always – Win as One Team: We foster a culture of psychological safety and mutual support. We trade our silos for a shared mission because collective impact always outweighs individual achievement. Empathize – Obsess Over the Customer: We don’t just solve technical problems; We look beyond the surface to build what our customers—both internal and external—actually need to succeed, not just what they asked for.

We aren’t afraid to change course when the data or our mission demands it. Build and maintain resilient, containerized NodeJS applications responsible for extracting, translating, and loading operational technology data. Interface with legacy and up-to-date building management protocols including BACnet, MQTT, (REST), SignalR (WebSockets), and raw TCP client connections.

Translate disparate data formats into our common data model for storage in Postgres. Ensure seamless data flow from our on-premises/edge environments into PostgreSQL and through to cloud-based RDS using logical replication. Write exceptionally well-tested code with a heavy emphasis on reliability, automated testing, and clean error recovery.

Partner with infrastructure teams to streamline deployments using Kubernetes, AWS CloudFormation, and Ansible.

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

Technical Skills: 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.

Experience with relational databases (Postgres preferred) and experience designing or working with data pipelines.

Experience deploying, configuring,



and troubleshooting containerized applications in a K8s setting (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. 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), ICT/SCADA environments, OT/CS security tooling (e.g., 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. Equity ~ Medical, Life, Short-Term Disability, and AD&D; insurance ~ Medical travel coverage ~ Dental coverage ~ Initial Chat : A brief call with our recruiting team to learn about your background and answer your initial questions about Simplesense. # Complete a technical assessment that reflects the work you’d be doing. # 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. 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).

📌 Senior C# Application Engineer (Picton)
🏢 Simplesense
📍 Picton