Senior Software Engineer – Digital Identity, Applied Cryptography

🕒 il y a 2 mois

🇩🇪 Allemagne – Télétravail

⏰ Temps Plein

🟠 Senior

🧑‍💻 Développeur Full-Stack

👻 Score fantôme 58%

infoinfo

🗣️🇩🇪 Allemand requis

🗣️🇺🇸🇬🇧 Anglais requis

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Logo of SaltRock GmbH

SaltRock GmbH

2 - 10 employés

Fondée en 2024

🔒 Cybersecurity

🤖 Intelligence artificielle

🏛️ Gouvernement

Cybersecurity • Artificial Intelligence • Government

SaltRock GmbH est une entreprise technologique basée à Cologne, spécialisée dans le développement de produits et services numériques sécurisés et souverains pour les institutions publiques, la défense et les clients industriels. Elle fournit des solutions de cloud computing, d'ingénierie logicielle, de cybersécurité et d'intelligence artificielle, et propose des produits axés sur l'Europe tels qu'Evida (une solution de protection des preuves/du cloud de preuves) et SecureID (un portefeuille PKI pour les identités numériques). SaltRock met l'accent sur la souveraineté numérique, les architectures sécurisées et la résilience opérationnelle à long terme pour les secteurs sensibles et réglementés (secteur public, police et justice, industrie et défense).

Description

• Technical responsibility for the continued development of the entire SecureID stack—from the mobile app and PKI backend to platform integrations • Expanding the exchange of cryptographic material and cryptographic operations with iOS and Android operating systems • Implementing CryptoTokenKit token extensions and Keychain integration on iOS • Implementing KeyChain Provider and Knox UCM/eSE integration on Android • Ensuring that third-party applications such as email, browsers, and VPN clients can use SecureID certificates without key material ever leaving secure hardware • Supporting the BSI approval process, including audit preparation, hardening, cryptographic compliance, threat modeling, and penetration-test coordination • Communicating with certification and testing bodies • Designing and implementing new features, such as credential lifecycle management, external IdP integration, and Smart Lock integrations • Further developing the Windows logon flow with Credential Provider and CNG Key Storage Provider bridge • Maintaining build, signing, and release processes • Expanding test coverage • Preparing technical documentation • Coordinating with partners and pilot customers

🎯 Exigences

• Several years of professional experience in mobile and/or systems-level software development, such as Swift/iOS, Kotlin/Android, C#/.NET, or C++ • Solid understanding of public-key cryptography and PKI, including X.509 certificates, ECDSA, certificate chains, and challenge-response protocols • Experience with Apple Keychain Services / Secure Enclave and Android Keystore or KeyChain • Ideally, experience with CryptoTokenKit extensions or Samsung Knox UCM • Practical experience with BSI approval or certification procedures, such as TR-03161, TR-02102, or Common Criteria; candidates must have actively supported at least one such process • Willingness to learn Flutter/Dart, Python, React, and Windows internals • Independent and structured approach to work • Experience with Git, CI/CD, and high-quality documentation • Fluency in written and spoken German and English • Nice to have: Secure Element development (eSE, PIV applets, Java Card, APDU protocols) • Nice to have: BLE (GATT, LE Secure Connections pairing) or NFC/HCE development • Nice to have: Windows internals (Credential Provider, LSA, CNG/KSP, Kerberos/PKINIT, MSI/WiX) • Nice to have: Zitadel or comparable OIDC IdPs, step-ca, Supabase, and Linux server administration (Hetzner) • Nice to have: Samba/Active Directory integration

🏖️ Avantages

• Latest MacBooks or Windows Surface devices • iPhone or Pixel, including an unlimited mobile plan, also for private use • ChatGPT, Claude, Personio, and HubSpot • Company credit card, including expense management software • Edenred City Card (€50 per month) • 30 days of annual leave • Trust-based working hours (“Come as you are”) • Remote work options • Modern offices in Münster, Cologne, and Leverkusen • Professional certifications • Leadership and soft-skills training • Access to LinkedIn Learning or Udemy

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