Senior Software Engineer – Java & Payment Technologies

$135000 - $150000

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.

• 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

• 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

• 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)

• 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

Base Salary: $135,000 - $150,000

• 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.