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# Linux Systems Developer OpenSSL C

- **Company:** Client Server
- **Location:** London, UK (Remote available)
- **Salary:** £75,000.0 - £85,000.0
- **Contract:** Permanent contract
- **Skills:** Bash Shell, Command-Line Interface, Code Review, Computer Programming, Debian Linux, Software Debugging, Linux, Memory Management, Linux Security Modules, OpenSSL, Public Key Infrastructure, X.509, Software Maintenance, Scripting
- **Published:** November 7, 2026
- **Apply:** https://www.client-server.com//job/linux-systems-developer-openssl-c/apply

## About the Role

* You have strong programming experience in C, including debugging, memory management and system-level programming
 * You're highly proficient with Bash scripting for automation, tooling, testing and integration
 * You have a deep understanding of Linux operating systems, especially Debian based ones, system services, process management, permissions and system administration
 * You have a good knowledge of OpenSSL (both on the command line and programmatically), X.509 certificates and PKI fundamentals
 * You understand Linux security mechanisms including seccomp, udev and auditd
 * You have a good knowledge of Linux privilege management, capabilities, access controls and application isolation
 * You have a strong understanding of secure software development practices, threat mitigation and common security vulnerabilities
 * You're keen to take ownership, work independently, solve complex technical problems and communicate technical concepts clearly

## Description

Do you have a deep knowledge of Linux combined with OpenSSL?

You could be progressing your career at a successful and expanding software house that provide cyber security products to a range of finance, government, defence, law enforcement and pharmaceutical companies.

As a Linux Systems Developer you'll join a core Linux team in a newly created role, taking ownership of developing and maintaining secure, reliable software at operating system level. You'll work across Linux security mechanisms, kernel-level hardening and cryptographic technologies, applying security-by-design principles throughout the development lifecycle.

This is a specialist engineering role suited to someone who enjoys working close to the operating system and tackling complex security challenges. You'll use C as your primary language, with Bash for scripting, developing robust, maintainable software and contributing to technical design and code reviews. A key focus will be assessing and strengthening the security of the Linux platform, including in-depth work with OpenSSL, X.509 certificates and PKI, as the organisation works towards Common Criteria certification.