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# Senior Software Developer - PKI

- **Company:** Mühlbauer GmbH & Co. KG
- **Location:** Hagen, Germany
- **Experience:** Expert
- **Contract:** Temporary contract
- **Skills:** Java (Programming Language), Automation of Tests, Code Review, Cyber Security, Continuous Integration, DevOps, Hardware Security Module, Key Management, Public Key Infrastructure, Simple Object Access Protocol (SOAP), Software Engineering, Git, Information Technology, Restful APIs, Docker
- **Published:** September 18, 2026
- **Apply:** https://www.indeed.com/viewjob?jk=85fa64dcafd22ef1

## About the Role

* Bachelor's degree in Computer Science, Information Technology, Engineering or a related field
 * At least 5 years of experience of PKI and cryptographic systems
 * Very strong knowledge of Java, REST, SOAP, PKCS#11
 * Experience with Hardware Security Modules (HSMs) and secure key management
 * Knowledge of security architecture and secure software development
 * Experience with Git, CI/CD, code reviews, and automated testing
 * Knowledge of Docker and Kubernetes is a plus
 * Excellent English skills
 * Willingness to travel internationally
 * Analytical, structured and solution-oriented approach to work
 * Strong decision-making capabilities

## Description

* Technical design and development of PKI components and services
 * Translation of security and business requirements into technical solutions
 * Architectural decisionmaking and documentation
 * Further development and improvement of existing PKI solutions
 * Provision of technical leadership and mentoring of software developers
 * Code, architecture, and security reviews
 * Analysis of complex certificate, cryptography, and production issues
 * Close collaboration with security, infrastructure, DevOps and application teams
 * Support in shaping the PKI architecture, certificate policy, and lifecycle management
 * Ensuring security, availability, performance, and compliance requirements