Senior Software Engineer - Java & Payment Technologies

Senior Software Engineer - Java & Payment Technologies

Our client, a fast-growing company within the EV/AV (Electric & Autonomous Vehicle) industry, is looking to add a Senior Software Engineer to their team in Irvine, CA. They're seeking someone with strong experience in Java development, API integrations, embedded systems, payment processing/POS solutions, and UI development.

Please note: This is a fully onsite position requiring attendance 5 days per week at the Irvine office.

This role offers the opportunity to work on innovative embedded technologies that support next-generation payment and vehicle solutions. The ideal candidate will have a strong software engineering background with experience developing applications that interact with firmware, payment devices, backend services, and user-facing interfaces. You'll collaborate with engineers across hardware, firmware, and software teams to build scalable, reliable, and high-performance solutions.

Required Skills & Experience

• Bachelor's or Master's degree in Computer Science, Computer Engineering, Electrical Engineering, or a related field
• Experience developing software for embedded systems
• Strong Java programming skills
• Experience building and supporting API integrations
• Solid understanding of embedded systems and software architecture
• Experience working with processors and peripheral interfaces
• Background supporting payment processing platforms, POS systems, and payment devices
• Experience with UI-layer development
• Strong debugging and troubleshooting skills in embedded environments
• Familiarity with Git, Jira, and Docker
• Experience with scripting and automation
• Knowledge of build tools and software deployment processes

Desired Skills & Experience

• C++ experience is highly preferred
• Exposure to cloud-based environments, particularly OTA (Over-the-Air) updates and backend integrations
• Familiarity with mobile payment technologies
• Prior experience in the EV, AV, or automotive industry

What You Will Be Doing
Tech Breakdown

• Java Development
• API Integration
• Payment Processing & POS Systems
• User Interface Development
• Firmware & Software Integration
• Test Automation
• Git, Jira, Docker
• Cloud Technologies (Nice to Have)
• C++ (Preferred)

Daily Responsibilities

• Design, develop, and maintain software applications for embedded systems
• Write and optimize Java-based code while contributing to C++ development efforts when needed
• Implement, validate, and support firmware-related functionality
• Create verification suites and automate test cases
• Partner with firmware and embedded engineering teams to ensure effective system integration
• Debug and troubleshoot software-to-firmware communication issues
• Develop and execute unit, integration, and system-level testing
• Analyze and resolve software defects, performance issues, and system bottlenecks
• Maintain development and testing documentation
• Provide project updates and communicate technical risks, issues, and resolutions
• Collaborate with hardware engineers, software developers, and product managers throughout the development lifecycle
• Participate in architecture discussions, design reviews, and code reviews

The Offer
Base Salary: $135,000 - $150,000
Benefits

• Medical, Dental, Vision, and Life Insurance
• Short-Term & Long-Term Disability Coverage
• 401(k) with 100% Company Match
• Paid Vacation and Sick Time
• 11 Paid Holidays

Applicants must be authorized to work in the United States on a full-time basis now and in the future.