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Senior Firmware Developer — Smartcard & Mobile Credentials(m/w/x)
Designing C++ firmware for smartcard and mobile credentials, integrating NFC and BLE. 5+ years embedded C++ 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
- Smartphone credential flows experience
- Mobile wallets, HCE, provisioning experience
- Applied cryptography in embedded systems familiarity
- Secure messaging, AES/HMAC, key usage familiarity
- Secure elements/SAM integration familiarity
- Secure boot familiarity
- OTA familiarity
- Debugging skills (JTAG/SWD, logic analyser)
- Embedded CI/CD experience
- Deep Mifare DESFire EVx personalization experience
- Low-power design knowledge
- Mobile platform SDKs/APIs knowledge
- Access control standards knowledge
- Security compliance (CRA, NIST, ETSI) knowledge
- Git familiarity
- Jira familiarity
- Embedded test frameworks familiarity
- Experience may not be a perfect fit
Tasks
- Design and implement C++ application firmware on microcontrollers
- Develop application logic for Mifare DESFire and future standards
- Manage app/file models, access conditions, personalization, and lifecycle
- Integrate NFC, BLE, and WLAN stacks
- Implement mobile credential workflows including provisioning and revocation
- Interface with secure elements for key storage and transaction offload
- Implement secure boot and signed/encrypted OTA updates
- Develop application-level runtime protections
- Enhance and maintain internal C++ and C# software suites
- Build tests and CI/CD artifacts
- Use protocol sniffers and hardware debuggers for validation
- Collaborate with mobile, backend, hardware, and QA teams
- Produce technical and security documentation
Work Experience
- 5 years
Education
- Bachelor's degreeOR
- Master's degree
Languages
- German – Advanced
- English – Business 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 fitness allowance
Mental Health Support
- Employee assistance program
Snacks & Drinks
- Free drinks
- Fresh fruit
Additional Allowances
- €250 childcare allowance
Retirement Plans
- Company pension subsidy
Corporate Discounts
- Employee discounts
Other Benefits
- Accommodations for disabilities
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Senior Firmware Developer — Smartcard & Mobile Credentials(m/w/x)
Designing C++ firmware for smartcard and mobile credentials, integrating NFC and BLE. 5+ years embedded C++ 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
- Smartphone credential flows experience
- Mobile wallets, HCE, provisioning experience
- Applied cryptography in embedded systems familiarity
- Secure messaging, AES/HMAC, key usage familiarity
- Secure elements/SAM integration familiarity
- Secure boot familiarity
- OTA familiarity
- Debugging skills (JTAG/SWD, logic analyser)
- Embedded CI/CD experience
- Deep Mifare DESFire EVx personalization experience
- Low-power design knowledge
- Mobile platform SDKs/APIs knowledge
- Access control standards knowledge
- Security compliance (CRA, NIST, ETSI) knowledge
- Git familiarity
- Jira familiarity
- Embedded test frameworks familiarity
- Experience may not be a perfect fit
Tasks
- Design and implement C++ application firmware on microcontrollers
- Develop application logic for Mifare DESFire and future standards
- Manage app/file models, access conditions, personalization, and lifecycle
- Integrate NFC, BLE, and WLAN stacks
- Implement mobile credential workflows including provisioning and revocation
- Interface with secure elements for key storage and transaction offload
- Implement secure boot and signed/encrypted OTA updates
- Develop application-level runtime protections
- Enhance and maintain internal C++ and C# software suites
- Build tests and CI/CD artifacts
- Use protocol sniffers and hardware debuggers for validation
- Collaborate with mobile, backend, hardware, and QA teams
- Produce technical and security documentation
Work Experience
- 5 years
Education
- Bachelor's degreeOR
- Master's degree
Languages
- German – Advanced
- English – Business 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 fitness allowance
Mental Health Support
- Employee assistance program
Snacks & Drinks
- Free drinks
- Fresh fruit
Additional Allowances
- €250 childcare allowance
Retirement Plans
- Company pension subsidy
Corporate Discounts
- Employee discounts
Other Benefits
- Accommodations for disabilities
Like this job?
BetaYour Career Agent finds similar jobs for you every day.
About the Company
SimonsVoss Technologies
Industry
Manufacturing
Description
Das Unternehmen ist Pionier der digitalen Schließtechnik und sorgt für sicherere und komfortablere Lebensräume.
Not a perfect match?
- SimonsVoss Technologies GmbH
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