Sr Software Engineer

Digi International•,

13d•$145,018•Remote

About The Position

We are seeking a Sr Software Engineer to own platform-level technical decisions for distributed cloud components and microservices using C#, .NET Core, MVVM, and related frameworks, applying object-oriented design and SOLID principles. The role involves leading and mentoring the development team, overseeing project execution, code quality, and technical delivery. Responsibilities include designing, developing, and optimizing real-time data pipelines between IoT devices, gateways, and cloud platforms using MQTT, WebSocket, SignalR, Redis, TCP/IP, and Kafka, leveraging Rust where performance and concurrency optimization are critical. The engineer will define and implement REST APIs and microservice architectures for large-scale IoT deployments, ensuring high availability, performance, and maintainability. This includes overseeing cloud infrastructure deployment and operations (AWS or equivalent), such as EC2, Lambda, Route 53, Cognito, RDS, ELB, and CloudWatch, to ensure fault tolerance, scalability, and reliability. The role also involves designing and managing LoRaWAN networks, LNS systems, and the network and communication layers for other IoT protocols, including device provisioning, messaging, and network optimization. Additionally, the engineer will design and implement scalable, high-performance data systems using MySQL and exposure to Cassandra or equivalent databases for telemetry and analytics workloads. Driving technical strategy for web interfaces and dashboards, enabling device management, configuration, and real-time visualization, and leading IoT security efforts, including secure coding practices, are key aspects. Ensuring platform compliance with ISO 9001 standards and implementing ISO-compliant software development processes are also required. Collaboration with cross-functional teams (embedded, DevOps, security, product management, business, and customer teams) to define platform architecture, device-cloud integration strategies, and roadmap priorities is essential. The position requires providing senior-level technical guidance and Level 3 support for production IoT systems, resolving complex issues affecting cloud platforms and device networks. Developing and executing automated unit and integration tests (e.g., NUnit) to ensure code quality, reliability, and adherence to ISO-compliant development processes, and documenting platform architecture, operational procedures, and design decisions are also part of the role. Participation in Agile planning and governance, influencing process improvements, technical strategy, and prioritization of work to ensure timely project delivery, is expected.

Requirements

Bachelor’s degree or equivalent in Computer Science, Computer Engineering, or a related field and 5 years of related, progressive, post-baccalaureate experience.
Architecting and developing cloud-native IoT software platforms using C# (.NET 6 or later) and applying object-oriented design and SOLID principles.
Designing and managing real-time data pipelines between IoT devices, gateways, and cloud platforms using MQTT, WebSocket, SignalR, Redis, TCP/IP, and Kafka.
Configuring and managing LoRaWAN networks, LNS systems, including device provisioning, messaging, and network optimization.
Deploying, managing, and monitoring cloud infrastructure (AWS or equivalent), including services such as EC2, Lambda, Route 53, Cognito, RDS, ELB, and CloudWatch, to ensure reliability, scalability, and fault tolerance.
Implementing and optimizing data persistence layers using MySQL and exposure to Cassandra or equivalent distributed and relational databases for scalable IoT data storage.
Designing and implementing distributed REST APIs and microservice architectures for multi-tenant, high-throughput IoT platforms.
Applying secure software development practices, coordinating with security teams on vulnerability scanning, penetration testing, and remediation.
Developing and executing automated unit and integration tests (e.g., NUnit) to ensure code quality, reliability, and compliance.
Experience with ISO 9001-compliant software development processes and familiarity with ISO design principles.
Experience gained concurrently is accepted.

Nice To Haves

Experience with MVVM and related frameworks.
Leveraging Rust where performance and concurrency optimization are critical.
Familiarity with other IoT protocols.
Exposure to Cassandra or equivalent databases.
Familiarity with ISO design principles.

Responsibilities

Own platform-level technical decisions for distributed cloud components and microservices using C#, .NET Core, MVVM, and related frameworks, applying object-oriented design and SOLID principles.
Lead and mentor the development team, overseeing project execution, code quality, and technical delivery.
Design, develop, and optimize real-time data pipelines between IoT devices, gateways, and cloud platforms using MQTT, WebSocket, SignalR, Redis, TCP/IP, and Kafka, leveraging Rust where performance and concurrency optimization are critical.
Define and implement REST APIs and microservice architectures for large-scale IoT deployments, ensuring high availability, performance, and maintainability.
Oversee cloud infrastructure deployment and operations (AWS or equivalent), including EC2, Lambda, Route 53, Cognito, RDS, ELB, and CloudWatch, to ensure fault tolerance, scalability, and reliability.
Design and manage LoRaWAN networks, LNS systems, and the network and communication layers for other IoT protocols, including device provisioning, messaging, and network optimization.
Design and implement scalable, high-performance data systems using MySQL and exposure to Cassandra or equivalent databases for telemetry and analytics workloads.
Drive technical strategy for web interfaces and dashboards, enabling device management, configuration, and real-time visualization.
Lead IoT security efforts, including secure coding practices, and coordinate with the security team on penetration testing, vulnerability scanning, and remediation.
Ensure platform compliance with ISO 9001 standards and implement ISO-compliant software development processes.
Collaborate cross-functionally with embedded, DevOps, security, product management, business, and customer teams to define platform architecture, device-cloud integration strategies, and roadmap priorities.
Provide senior-level technical guidance and Level 3 support for production IoT systems, resolving complex issues affecting cloud platforms and device networks.
Develop and execute automated unit and integration tests (e.g., NUnit) to ensure code quality, reliability, and adherence to ISO-compliant development processes.
Document platform architecture, operational procedures, and design decisions to support internal knowledge, regulatory compliance, and continuous improvement.
Participate in Agile planning and governance, influencing process improvements, technical strategy, and prioritization of work to ensure timely project delivery.