Software Engineer (C, Authentication & Identity) – Remote (f/m/d)

SecurityBridge is a fast-growing global software leader transforming how enterprises secure their SAP environments. Our mission is to deliver cutting-edge, high-impact SAP security solutions that enable some of the world’s largest organizations to stay ahead of ever-evolving cyber threats. We are looking for a Software Engineer to join the team behind TrustBroker, SecurityBridge’s SAP-certified authentication solution. TrustBroker enables enterprise customers to enforce policy-based multi-factor authentication (MFA) across SAP environments and is certified for RISE with SAP. In this role, you will work across the full software development lifecycle, contributing to both product development and quality assurance. You will develop new functionality, resolve complex technical issues, write automated tests, and ensure the reliability and security of authentication mechanisms used by enterprise customers worldwide. You will play a key role in maintaining and evolving authentication technologies , and multi-factor authentication integrations while helping shape the future of secure SAP authentication. Key Responsibilities Develop,maintain, and enhanceTrustBrokerfunctionality across authentication and identity management components. Implementfixes and feature enhancements for Kerberos, OpenID Connect (OIDC), RADIUS, and multi-factor authentication integrations. Contributeto theexpansion of OIDC-based authentication capabilities. Design, implement, andmaintainautomated tests for all delivered functionality, including unit and integration testing. Validate integrations against real identity providers and MFA vendors, including Microsoft Entra ID, Okta, Ping Identity, Duo, and others. Troubleshoot complex authentication, connectivity, and protocol-related issues across customer environments. Maintain and improve customer-facing documentation, configuration references, and troubleshooting guides. Collaborate closely with Product, Support, and Engineering teams to deliver secure and reliable authentication solutions. Participate in design discussions and contribute to architectural decisions for security-critical functionality. Leverage modern development tools, including AI-assisted development workflows, to improve productivity and code quality. Required Qualifications 3–5+ years of professional software development experience in C. Strong understanding of memory management, multithreading, error handling, and cross-platform software development. Hands-on experience with at least one authentication or identity protocol, such as Kerberos, OpenID Connect (OIDC), OAuth 2.0, SAML, or RADIUS. Solid understanding of TLS, PKI, X.509 certificates, and modern authentication concepts. Experience developing software for Windows and Linux environments. Strong troubleshooting and debugging skills, including protocol analysis and log-based root-cause investigation. Experience writing automated tests as part of the development process. Ability to work independently in a remote, international team environment. Strong written and verbal communication skills in English. Openness to modern development practices, including AI-assisted coding and iterative delivery methodologies. Nice to Have Experience with Kerberos and Active Directory environments. Experience implementing or supporting OpenID Connect (OIDC) solutions. Experience integrating with MFA providers such as Microsoft Entra ID, Okta, Ping Identity, Duo, RSA, or RADIUS-based solutions. Familiarity with SAP technologies, including SAP NetWeaver, SNC, SAP Crypto, RFC SDK, or SAP BTP. Experience with OpenSSL and security-focused software development. Knowledge of DNS, certificate management, and enterprise authentication architectures. Experience creating technical documentation for customers or internal teams. Customer-facing experience, with a willingness to develop toward pre-sales responsibilities. Important Information This position is remote Worldwide. Visa sponsorship and relocation support are not available. Candidates must hold valid authorization to work in their country of residence. Our Offer The opportunity to work on a security-critical authentication product used by enterprise customers worldwide. Exposure tomodern identity, authentication, and SAP security technologies. A collaborative, international engineering team with a strong focus on quality and innovation. Flexible working hours and aresults-oriented work culture. Professional development and continuous learning opportunities. Competitive salary and benefits package. What Makes It Special to Work with Us Flat hierarchies await you at our company. If you have a good idea or knowledge, feel free to contribute, your perspective is valued from day one. We trust our people to organize their work in a way that suits them best, focusing on outcomes rather than physical presence. Honesty, respect, helpfulness, and integrity form the core of our company culture. We believe strong teams are the foundation of sustainable success. That’s why we strive to create an environment where employees feel supported, connected, and empowered to grow.