Mid-Senior Level .NET Engineer / Hybrid / Chicago, IL

Company: Motion Recruitment Partners LLC
Location: Chicago
Posted on: May 14, 2025

Job Description:

This Chicago-based technology-driven online brokerage firm was founded by traders, for traders. They specialize in providing intuitive, customizable platforms for individual investors and financial professionals. Their deep-rooted history in the Chicago Board Options Exchange, commitment to innovation, and adherence to regulatory excellence have positioned us as a trusted name in online trading. As they continue to expand their trading infrastructure, they're seeking a skilled .NET Engineer with trading platform experience to join their team and help shape their next generation of greenfield solutions.
They are looking for a Mid-Senior .NET Engineer who is passionate about building high-performance trading systems from the ground up. The ideal candidate will bring hands-on experience with C#, .NET Core 8, microservices, and modern CI/CD practices. A strong background in trading systems is required, along with a track record of contributing to greenfield projects.
Required Skills & Experience

• 
  
• Design, develop, and maintain scalable microservices using C# and .NET Core 8.
  
• Contribute to the architecture and development of greenfield trading platform components.
  
• Build and optimize CI/CD pipelines using Jenkins and Git-based workflows.
  
• Integrate and manage MongoDB as part of a high-performance data layer.
  
• Collaborate with product managers, trading analysts, and QA to deliver robust, secure, and performant features.
  
• Ensure trading platform reliability, fault tolerance, and low-latency performance.
  
• Follow best practices in security, testing, and DevOps for production-grade software.
  
• Participate in code reviews and contribute to the continuous improvement of the engineering team.
  
  What You Will Be Doing
  Tech Breakdown
  
  • 
    
  • 85% new development
    
  • 15% maintenance and enhancements
    
    Daily Responsibilities
    
    • 
      
    • 5+ years of experience in software engineering with a focus on C# and .NET Core (v8 preferred).
      
    • Strong experience in microservices design and implementation.
      
    • Proven experience building trading systems or working within the financial trading industry.
      
    • Solid understanding of MongoDB and NoSQL data modeling.
      
    • Hands-on experience with CI/CD pipeline development using Jenkins.
      
    • Experience with Git, REST APIs, and modern development tools.
      
    • Familiarity with multithreading, performance tuning, and fault-tolerant system design.
      
    • Prior involvement in greenfield projects from inception to deployment.
      
    • Experience with Kubernetes or Docker.
      
    • Background in financial compliance, market data feeds, or FIX protocol.
      
    • Knowledge of front-end frameworks (e.g., React, Angular) is a plus.
      
      Office Location
      
      • 
        
      • Chicago Loop, IL
        
      • Hybrid
        
      • 4 days onsite // 1 day WFH
        
        The Offer
        
        • 
          
        • Mid Level: $110-130K base
          
        • Senior Level: $130-180K base
          
          You will receive the following benefits:
          
          • 
            
          • Medical Coverage
            
          • Dental Coverage
            
          • PTO
            
          • 401K
            
            Applicants must be currently authorized to work in the US on a full-time basis now and in the future.
            #J-18808-Ljbffr

Keywords: Motion Recruitment Partners LLC, Naperville , Mid-Senior Level .NET Engineer / Hybrid / Chicago, IL, Engineering , Chicago, Illinois