Mobile Packet Core Engineer Jobs in Rancho Cucamonga, CA

Build Mobile Apps That Connect Professionals to the Tools They Depend On

Why Fieldpiece?

Fieldpiece is a privately held, global leader in professional HVACR tools and test instruments. We're known for developing innovative products that technicians rely on every day—and for investing in our people, our technology, and our future. Named one of the Best Places to Work in Southern California for four consecutive years, we're looking for talented people who want to make an impact while growing their careers.

Why This Role?

The mobile experience is becoming one of the most important ways customers interact with Fieldpiece products.

As a Senior iOS / Android Engineer, you'll design, develop, and support native iOS and Android applications that connect technicians to the data, diagnostics, and insights generated by our industry-leading tools. You'll work closely with Product, UX, Cloud Engineering, and Software Engineering teams to build intuitive, high-performance mobile applications that integrate with SaaS and DaaS platforms and help shape the future of connected HVACR technology.

This is a hands-on engineering role where you'll influence architecture, champion mobile development best practices, and help deliver applications that technicians depend on every day.

This position is based in our Orange, CA office with an exciting move to Tustin, CA in 2028.  We offer a hybrid work schedule with employees typically working onsite three days per week. Additional onsite days may be required for team collaboration, planning sessions, or other business needs. Travel is expected to be up to 10%.

What You'll Do

• Design, develop, and maintain native iOS and Android applications using Swift, Objective-C, Kotlin, and Java.
• Support the full application lifecycle, including design, development, testing, deployment, monitoring, and ongoing enhancements.
• Build secure, high-performance mobile applications that integrate with cloud-based SaaS and DaaS platforms through RESTful APIs.
• Optimize application performance, reliability, responsiveness, and maintainability across supported devices and operating systems.
• Troubleshoot complex technical issues and contribute to high-quality, well-tested code with minimal technical debt.
• Collaborate with Product Management, UX/UI, Cloud Engineering, and Software Engineering teams to deliver intuitive customer experiences.
• Champion mobile engineering best practices while contributing to architecture, code quality, Agile delivery, and continuous improvement.

What Makes This Opportunity Different

• Connected products. Build mobile applications that work seamlessly with professional HVACR tools used by technicians worldwide.
• Modern technology stack. Develop native iOS and Android applications integrated with cloud platforms, REST APIs, AWS services, and connected technologies.
• Meaningful customer impact. Your work directly improves how professionals diagnose, troubleshoot, and maintain critical HVACR systems.
• Collaborative development. Work closely with Product, UX, Cloud Engineering, and Software Engineering teams throughout the product development lifecycle.
• Innovation. Help shape the future of connected products by contributing to mobile architecture, AI-enabled capabilities, and evolving customer experiences.

In Your First Year, You'll Likely

• Build relationships across the organization to become a trusted technical contributor for our native applications and deliver new features and enhancements that improve the customer’s experience across iOS and Android platforms.
• Improve and evolve our mobile architecture, standards/processes, application quality, performance, reliability, and maintainability through engineering best practices.

What You Bring

• Bachelor's degree in Computer Science, Information Technology, or a related field, or equivalent practical experience.
• 5+ years of professional software development experience, including at least 3 years developing mobile applications.
• Strong experience developing native iOS and/or Android applications using Swift, Objective-C, Kotlin, or Java.
• Experience integrating mobile applications with RESTful APIs and cloud-based services.
• Knowledge of mobile data storage technologies such as SQLite, Room, Core Data, or similar frameworks.
• Working knowledge of server-side technologies such as Go, Node.js, or Python.
• Experience using Git, GitHub, code reviews, and modern source control workflows.
• Excellent communication and collaboration skills with the ability to explain technical concepts clearly.
• Experience working in Agile software development environments.

Bonus Points If You Have

• Experience developing applications that integrate with SaaS or DaaS platforms.
• Experience with AWS cloud environments and cloud-hosted applications.
• Experience supporting AI-assisted or AI-first software development practices.
• Experience developing AI-enabled mobile features or automation.
• Experience with connected devices, IoT platforms, HVAC technologies, or field-service applications.

Why You’ll Enjoy Working at Fieldpiece

• As a privately held company, we invest for the long term—in our people, our products, and our future. That means we can focus on innovation, continuous improvement, and building lasting careers rather than chasing short-term results.
• Work alongside talented, collaborative teammates who are passionate about innovation and solving real-world problems.
• Make a meaningful impact in a company where your ideas are heard, your expertise is valued, and your contributions help shape the future of our products and business.

Benefits & Perks

We believe great work starts with supporting our employees. That’s why we offer a competitive total rewards package designed to promote your health, financial well-being, work-life balance, and professional growth.

• Competitive base salary with annual bonus opportunity
• Comprehensive medical, dental, and vision coverage
• 401(k) with company match and immediate vesting
• Generous paid time off and paid holidays
• Hire to Retire philosophy—Individual Development Plans for everyone and a commitment to supporting career development
• Flexible Spending Accounts, Health Savings Accounts, and Employee Assistance Program
• Music program, including music rooms in all U.S. offices and onsite guitar, piano, and voice lessons in California
• Recognition programs, launch parties, and team-building events to celebrate shared successes

Our Culture

At Fieldpiece, our values shape how we work, collaborate, and serve our customers every day:

• Teamwork: We collaborate, support one another, and win as a team.
• Urgency: We move quickly, stay agile, and focus on what matters most.
• Respect: We value diverse perspectives and treat everyone with professionalism and integrity.
• Trust: We build strong relationships through accountability and transparency.
• Learning: We embrace curiosity, continuous improvement, and personal growth.
• No Ego: We leave titles and egos at the door, value the best ideas regardless of where they come from, and work together with humility, openness, and mutual respect.

At Fieldpiece, we’re building more than innovative products - we’re building careers. If you’re looking for a place where your work matters and your contributions are recognized, we’d love to meet you.

The California target base annual salary range for this role is currently $140,000 to $180,000 + bonus.  Pay scales are determined by role, level, location, and alignment with market data. Individual pay is determined through interviews and an assessment of several factors that that are unique to each candidate, including but not limited to, job-related skills, relevant education and experience, certifications, abilities of the candidate and pay relative to other team members. We can share more information about our bonus program and benefits during the hiring process.

EOE AA M/F/Veteran/Disability