Senior Software Engineer – Java & Payment Technologies

Motion Recruitment Partners LLC

Irvine (CA)

On-site

USD 135,000 - 150,000

Full time

14 days+

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Benefits offered by this job

Medical insurance

Dental insurance

Vision insurance

Life Insurance

Short-Term & Long-Term Disability

401(k) with 100% Company Match

Paid Vacation and Sick Time

11 Paid Holidays

Job summary

Motion Recruitment Partners LLC in Irvine, CA seeks a Senior Software Engineer to advance Java-based solutions for embedded systems, payment processing, API integrations, and UI development. You will design, implement, and test software that interfaces with firmware, payment devices, and backend services.

This onsite role requires collaboration with hardware, firmware, and software teams to deliver scalable, high-performance solutions.

Qualifications

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

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

Skills

Strong Java programming skills

Experience building and supporting API

Experience developing software for嵌入式系

UI-layer development experience

Strong debugging and troubleshooting

Scripting and automation experience

Knowledge of build tools and software

C++ experience

Cloud technologies exposure

Education

Bachelor's or Master's degree in Computer Science, Computer Engineering, Electrical Engineering, or a related field

Tools

Git

Jira

Docker

Job description

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