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SISimonsVoss Technologies GmbH

Senior Firmware Developer — Smartcard & Mobile Credentials(m/w/x)

Unterföhring
Full-timeWith Home OfficeSenior

Designing C++ firmware for smartcard and mobile credential integration on microcontrollers. 5+ years embedded C++ and RTOS experience required. 30 days vacation, remote work possible.

Requirements

  • 5+ years embedded firmware experience
  • Strong C++ experience for microcontrollers
  • Practical RTOS experience (Zephyr advantageous)
  • Hands-on RFID/NFC experience
  • ISO 14443, Mifare DESFire EVx preferred
  • Experience with smartphone credential flows
  • Familiarity with applied cryptography
  • Secure elements/SAM integration
  • Secure boot and OTA
  • Debugging skills (JTAG/SWD, logic analyser)
  • Embedded CI/CD experience
  • Good German skills
  • Strong English skills
  • Deep Mifare DESFire EVx personalization experience
  • Low-power design knowledge
  • Mobile platform SDKs/APIs knowledge
  • Knowledge of access control standards
  • Security compliance knowledge (CRA, NIST, ETSI)
  • Familiarity with Git, Jira, and embedded test frameworks
  • Interest in creating a diverse, inclusive, and authentic workplace
  • Willingness to apply even if experience doesn't perfectly match
  • Consideration regardless of experience, appearance, national origin, religion, age, gender, gender identity, disability, sexual orientation, or other protected characteristics

Tasks

  • Design and implement C++ application firmware on microcontrollers
  • Develop application-level features
  • Integrate physical and smartphone-based credential processing
  • Implement RTOS features (tasking, IPC, power-aware scheduling)
  • Develop application logic for Mifare DESFire and future standards
  • Manage app/file models, access conditions, personalization, and lifecycle
  • Integrate NFC, BLE, and WLAN stacks
  • Integrate mobile credential workflows (provisioning, HCE, revocation)
  • Interface with secure elements/SAMs for key storage
  • Interface with secure elements/SAMs for transaction offload
  • Implement secure boot
  • Implement signed/encrypted OTA updates
  • Implement application-level runtime protections
  • Enhance internal software suites (C++, C#)
  • Maintain internal software suites (C++, C#)
  • Build tests and CI/CD artifacts
  • Use protocol sniffers for validation
  • Use hardware debuggers for validation
  • Collaborate with mobile, backend, hardware, and QA teams
  • Produce technical documentation
  • Produce security documentation

Work Experience

  • 5 years

Education

  • Bachelor's degreeOR
  • Master's degree

Languages

  • GermanAdvanced
  • EnglishBusiness Fluent

Tools & Technologies

  • C++
  • RTOS
  • Zephyr
  • RFID
  • NFC
  • ISO 14443
  • Mifare DESFire EVx
  • HCE
  • AES
  • HMAC
  • JTAG
  • SWD
  • Git
  • Jira

Benefits

Flexible Working

  • Flexitime model
  • Remote work possible

More Vacation Days

  • Time off in lieu
  • 30 days vacation

Mentorship & Coaching

  • Structured onboarding
  • Mentoring on development
  • Mentoring on career paths

Learning & Development

  • Hands-on training
  • Access to Busuu
  • Access to Allegion Academy
  • Access to LinkedIn Learning

Company Bike

  • Job bike leasing
  • E-bike leasing

Healthcare & Fitness

  • €30 gross fitness allowance

Mental Health Support

  • Employee assistance program

Snacks & Drinks

  • Free drinks
  • Fresh fruit

Childcare

  • Up to €250 gross childcare allowance

Retirement Plans

  • Company pension subsidy

Corporate Discounts

  • Exclusive employee discounts

Informal Culture

  • Flat organizational structures

Team Events

  • Team events
Find the original job posting in its most current version here. Nejo automatically captured this job from the website of SimonsVoss Technologies GmbH and processed the information on Nejo with the help of AI for you. Despite careful analysis, some information may be incomplete or inaccurate. Please always verify all details in the original posting! Content and copyrights of the original posting belong to the advertising company.

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