Senior .NET Developer

Brooksource; Grand Rapids (MI); On-site; USD 120,000 - 180,000; Full time

Job summary

Brooksource in Grand Rapids, MI, seeks a Senior Backend Engineer to design and build scalable backend services that power digital receipt experiences integrated with POS platforms. You will work with a small, expert team to deliver reliable APIs and evolving architectures.

The role emphasizes performance in high-transaction environments, full software lifecycle, and close collaboration with product teams. Ideal candidates have deep .NET/C# backend experience, REST API design skills, and a

Qualifications

• 5–10 years of professional software development experience.
• Strong .NET/C# backend development experience.
• Experience designing REST APIs and distributed services.

Responsibilities

• Design and build scalable backend services using .NET/C#.
• Develop and maintain RESTful APIs powering digital receipts.
• Integrate services with POS and transaction systems.
• Contribute to architecture decisions and system design.
• Participate in full software lifecycle: design, test, and deploy.
• Ensure performance and reliability in high-transaction environments.

Skills

Distributed systems

System design

Problem solving

Debugging

Collaboration

Tools

.NET / C#

REST APIs

POS integration

Distributed services design

Job description

Build the systems behind millions of digital transactions.

We’re looking for a Senior Backend Engineer who enjoys solving complex problems and building scalable systems. In this role, you’ll design and develop backend services that power digital receipt experiences integrated with POS platforms, helping businesses modernize how transactions are captured and delivered to customers.

You’ll work with a small, highly skilled team to create reliable APIs, improve backend architecture, and ship software used in high-volume environments.

What You’ll Do

• Design and build scalable backend services using .NET / C#
• Develop and maintain RESTful APIs powering digital receipt platforms
• Integrate services with POS and transaction systems
• Contribute to architecture decisions and system design
• Participate in the full software lifecycle: design, development, testing, and deployment
• Ensure performance, reliability, and scalability in high-transaction environments
• Collaborate with engineers, product teams, and stakeholders

What You Bring

• 5-10 years of professional software development experience
• Strong experience with .NET / C# backend development
• Experience designing and building REST APIs and distributed services
• Solid understanding of system design, integration patterns, and scalable architecture
• Ability to work independently while contributing to a collaborative engineering team
• Strong problem-solving and debugging skills

Nice to Have

• Experience integrating with POS systems
• Experience with digital transaction or receipt platforms
• Exposure to AI or context-driven systems
• Background in high-availability, high-volume platforms

Why Join Us

• Work on high-impact, large-scale transaction systems
• Collaborate with a small, expert engineering team
• Solve meaningful technical challenges with real-world impact