Senior Software Engineer – Java & Payment Technologies Job Irvine area,California USA,Software Development

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.

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