.NET Developer

Fluid Workforce Solutions•Neenah, WI

17h•Onsite

About The Position

We're looking for a Senior .NET / WPF Developer to join an onsite team building and enhancing a laboratory information management and instrument integration system. You'll own the development of a complex desktop application spanning instrument communication, data processing workflows, and reporting — working directly with engineering, product, and QA stakeholders in an Agile environment. If you thrive in device-connected, data-intensive environments and enjoy solving real-world integration challenges, this role is worth a close look.

Requirements

5–8 years of software development experience
Strong proficiency in WPF and desktop UI development
Solid experience with C# and .NET Core / .NET Framework
Hands-on experience with serial communication and COM port-based integrations
Strong understanding of multithreading and async programming using Task and async/await
Experience integrating hardware devices through APIs, SDKs, or communication protocols
Knowledge of database access technologies such as ADO.NET or ORMs
Experience with modular application architecture and desktop application design
Strong problem-solving and debugging skills in device-connected environments
Must be eligible to work in the United States

Nice To Haves

Experience with laboratory systems, scientific instruments, or embedded device integrations
Familiarity with LIMS workflows, sample/result handling, or regulated lab environments
Knowledge of NI libraries or equivalent integration frameworks
Experience with installer creation and deployment packaging
Exposure to offline-first applications and sync mechanisms

Responsibilities

Design and develop a WPF-based desktop application using a modular, scalable architecture
Build and enhance workflows supporting lab data capture, calibration, measurement, review, and reporting
Implement multithreading and async programming patterns for real-time instrument interaction and responsive UI behavior
Develop data access, offline data handling, synchronization, and upload capabilities
Enable data export, reporting, and printing functionalities
Implement device integration frameworks for multiple laboratory instruments and peripheral devices
Develop device management and configuration modules, including health checks, status monitoring, thresholds, and communication settings
Handle serial communication and device connectivity using COM protocols, device APIs, and SDKs
Partner with engineering, product, and QA teams on architecture, testing strategy, and deployment planning
Perform end-to-end validation, integration testing, and issue resolution across device and application workflows