Developer, Applications

Job Posting Start Date 02-16-2026 Job Posting End Date

Flex is the diversified manufacturing partner of choice that helps market-leading brands design, build and deliver innovative products that improve the world.

A career at Flex offers the opportunity to make a difference and invest in your growth in a respectful, inclusive, and collaborative environment. If you are excited about a role but don't meet every bullet point, we encourage you to apply and join us to create the extraordinary.

Job Summary

To support our extraordinary teams who build great products and contribute to our growth, we're looking to add a Developer Applications located in Buffalo Grove, IL.

Reporting to the Systems Architecture Manager, the Developer Applications with strong experience in Manufacturing Execution Systems (MES) and enterprise system integrations. This role involves designing, developing, and deploying robust applications and services using modern technologies, ensuring seamless integration between MES and other enterprise platforms. The ideal candidate will have deep technical expertise, hands-on development experience, and the ability to work in regulated environments.

What a typical day looks like:

• Design and develop applications using .NET (C#) and SQL Server.
• Build Windows Services, REST APIs, and real-time communication features using SignalR.
• Develop responsive UIs using Bootstrap and Angular.
• Read and interpret functional and technical specifications to ensure accurate implementation.
• Perform unit testing and participate in stress test deployments to validate performance and reliability.
• Implement integrations between MES and ERP, WMS, QMS, and other systems using modern protocols (REST, OPC UA, MQTT, AMQP).
• Ensure secure, scalable, and reliable data exchange across platforms
• Participate in solution design discussions and recommend best practices for integration and architecture.
• Optimize performance and ensure high availability of applications.
• Participate in solution design discussions and recommend best practices for integration and architecture.
• Use Azure DevOps for CI/CD pipelines, version control, and automated deployments.
• Ensure solutions meet regulatory requirements (e.g., FDA, GxP) and internal quality standards.
• . Stay updated on emerging technologies such as event-driven architectures, microservices, containerization (Docker/Kubernetes), edge computing, OPC UA, MQTT, IIoT platforms, cloud-native services (Azure IoT, AWS IoT Core), and AI/ML for predictive analytics, and recommend adoption where appropriate."

The experience we're looking to add to our team:

• Bachelor's degree in Computer Science, Information Systems, or related field.
• 7+ years in application development with strong focus on .NET and SQL.
• Mandatory: .NET (C#), SQL Server, Windows Services, Azure DevOps.
• Good to have experience in regulatory environments (FDA, GxP).
• Exposure to MES systems

#LI-EA1

EA42

SS26

AA01

CH12

MS14

CC11

What you'll receive for the great work you provide:

• Full range of medical, dental, and vision plans
• Life Insurance
• Short-term and Long-term Disability
• Matching 401(k) Contributions
• Vacation and Paid Sick Time
• Tuition Reimbursement

Pay Range (Applicable to Illinois)

$94,900.00 USD - $130,500.00 USD Annual

Job Category

IT

Is Sponsorship Available?

No

Flex is an Equal Opportunity Employer and employment selection decisions are based on merit, qualifications, and abilities. We do not discriminate based on: age, race, religion, color, sex, national origin, marital status, sexual orientation, gender identity, veteran status, disability, pregnancy status, or any other status protected by law. We're happy to provide reasonable accommodations to those with a disability for assistance in the application process. Please email accessibility@flex.com and we'll discuss your specific situation and next steps (NOTE: this email does not accept or consider resumes or applications. This is only for disability assistance. To be considered for a position at Flex, you must complete the application process first).