eUICC & Baseband Firmware Engineer

Apple | San Diego, CA

Posted Date 6/25/2025

Description Join Apple's Wireless Software Engineer eSIM team and drive innovation that matters! We have shipped eSIM features across iPhone, iPad, and Cellular watch. We create and seamlessly integrate technologies that enrich people's lives and deliver the absolute best user-experience. If you are passionate about writing code and would be interested in developing eSIM features for Apple's Cellular Products, then we may have the job for you. The Wireless Technologies team is looking for a strong programmer to join our growing eSIM team.

Description

Working as a part of an extraordinary development team, we are searching for a highly motivated software developer. In this position, you will have the opportunity to develop exciting features for Apple's next generation products. You work will involve telephony, SIM, and protocol software. Your contributions will make a clear difference towards future iOS products. RESPONSIBILITIES Design, implement, and maintain firmware components for eUICC and secure element subsystems on vendor baseband platforms INTEGRATE BASEBAND FIRMWARE WITH HOST-SIDE FRAMEWORKS AND IOS INTERFACES Collaborate with silicon vendors to bring up and validate custom firmware features Debug and resolve issues across AP-BB-SE interfaces, including ISO7816, SWP, and proprietary channels Contribute to system-level architecture discussions involving eSIM provisioning, activation, and lifecycle management Analyze and ensure compliance with GSMA and 3GPP specifications related to eUICC and cellular connectivity Work cross-functionally with security, protocol stack, and carrier engineering teams to support feature delivery and certification

Minimum Qualifications

Strong expertise in embedded firmware development
Hands-on experience with baseband modem platforms (Qualcomm, MTK, etc.)
Deep understanding of eUICC architecture, SIM file systems, and ISO/ETSI standards (e.g., TS 102 221, TS 102 222)
Solid debugging skills using tools such as JTAG, QXDM, and protocol-level log analyzers
Familiarity with cellular technologies (3GPP Rel-13 and above), SIM provisioning workflows, and secure boot environments
Experience with AP-BB-SE com munition protocols

Preferred Qualifications

Exposure to OS-level integration (iOS or RTOS environments)
Understanding of cryptographic protocols used in eUICC lifecycle (PKI, TLS, ASN.1)
Ability to work independently in a fast-paced, cross-functional engineering environment
Thrive in a collaborative environment and can clearly communicate with multi-functional teams
Hard-working and inquisitive, and seek to solve everyday problems in innovative ways
You are upbeat, adaptable, and results oriented with a positive attitude

Pay & Benefits

At Apple, base pay is one part of our total compensation package and is determined within a range. This provides the opportunity to progress as you grow and develop within a role. The base pay range for this role is between $135,400 and $250,600, and your base pay will depend on your skills, qualifications, experience, and location.

Apple employees also have the opportunity to become an Apple shareholder through participation in Apple’s discretionary employee stock programs. Apple employees are eligible for discretionary restricted stock unit awards, and can purchase Apple stock at a discount if voluntarily participating in Apple’s Employee Stock Purchase Plan. You’ll also receive benefits including: Comprehensive medical and dental coverage, retirement benefits, a range of discounted products and free services, and for formal education related to advancing your career at Apple, reimbursement for certain educational expenses — including tuition. Additionally, this role might be eligible for discretionary bonuses or commission payments as well as relocation. Learn more about Apple Benefits.

Note: Apple benefit, compensation and employee stock programs are subject to eligibility requirements and other terms of the applicable plan or program.

Salary135,400.00 - 250,600.00 Annual