App Dev & Support Engineer III

Role Overview

• Develop and maintain applications using:
• C; for system-level and device interaction
• C# (.NET) for application and API layers
• Python for AI integration, automation, and data processing
• Build scalable, high-performance POS software systems
• Optimize code for low-latency and real-time execution
• Debug and resolve complex production issues
• Implement and support serial communication (RS232, USB, COM) with:
• Payment terminals
• Barcode scanners
• Receipt printers
• Cash drawers
• Develop device drivers/interfaces and handle protocol-level communication
• Ensure reliable message parsing, retries, and fault tolerance
• Design and implement secure, scalable REST APIs
• Enable seamless communication between POS devices and backend systems
• Implement authentication, encryption, and validation mechanisms
• Optimize APIs for real-time transaction processing
• Develop and integrate AI/ML models into POS workflows using Python
• Implement fraud detection and anomaly detection models
• Transaction pattern analysis
• Intelligent diagnostics and log analysis
• Use Generative AI for:
• Automated troubleshooting
• Code generation and optimization
• Smart documentation and knowledge systems
• Integrate with payment gateways, ticketing systems, and enterprise platforms
• Develop simulation tools for hardware testing
• Perform unit, integration, and end-to-end testing
• Support field deployments and production troubleshooting
• Ensure compliance with payment security standards (PCI-DSS awareness)
• Optimize systems for throughput, latency, and reliability
• Implement robust logging, monitoring, and observability

Requirements

• Bachelor’s degree in Computer Science, Engineering, or equivalent experience
• 5+ years of software development experience
• Strong proficiency in:
• C++ (embedded/system-level programming)
• C# (.NET)
• Python (AI/automation/data processing)
• Experience with serial communication protocols
• Strong understanding of REST API development
• Strong Python skills for:
• AI/ML model integration
• Data processing and automation
• Understanding of latency optimization and real-time constraints
• Experience with:
• Model deployment and inference pipelines
• Anomaly detection and classification models
• Familiarity with frameworks (preferred):
• TensorFlow / PyTorch / Scikit-learn
• Experience integrating AI APIs (OpenAI, Azure AI, etc.)
• Real-Time Processing Skills
• Event-driven and streaming architectures
• Multithreading and concurrency (C++/C#)
• Async programming and performance tuning

Tech Stack

• Azure
• Python
• PyTorch
• Scikit-Learn
• Tensorflow
• .NET

Benefits

• Health & Welfare Benefits: Comprehensive plans tailored to your needs, effective from day one.
• Retirement Savings: Robust programs to help you secure your financial future.
• Employee Discounts: Access to a wide range of discounts on merchandise, services, travel, and more.
• Career Growth Opportunities: Paths for advancement within a global organization.
• Paid Training: Learn while you earn with award-winning learning platforms.
• Paid Time Off: Competitive PTO packages to help you recharge.
• Great Work Environment: Join an award-winning culture that values diversity and inclusion.