Software Engineer III

TLDR

Build and maintain secure communication components for mission-critical systems, ensuring software performance and collaboration in a diverse developer environment.

This role focuses on building and maintaining secure communication components for mission-critical systems, including SSH, TLS/SSL, and related cryptographic services on enterprise platforms. You will work on system-level software used by global financial institutions and Fortune 500 companies to secure their mission critical environments.

Responsibilities

  • Design, develop, test and troubleshoot software across different hardware, database and programming technologies
  • Write clean, maintainable code based on functional and technical specifications
  • Analyze and improve software performance
  • Create and maintain technical documentation
  • Collaborate in a multiple developer environment

Requirements

  • 5+ years of C/C++ programming experience delivering software solutions, including system-level development (networking, sockets, secure communication components such as SSH and TLS/SSL).
  • Experience with developing integrations withterminal emulators in VT100/VT102/6530 and other formats.
  • 3–5 years of experience working with relational databases and writing SQL scripts.
  • Hands-on experience with software design patterns and principles.
  • Strong familiarity with Agile and DevSecOps practices.
  • Experience developing system-level, shippable software, ideally including secure connection handling, certificate management, cryptographic libraries (e.g., OpenSSL), and key exchange workflows.
  • Expertise building software for nix-based operating systems, including POSIX APIs, daemon/service development, and TCP/IP networking internals.
  • Expertise with *nix-based scripting languages.
  • Experience with mission-critical or fault-tolerant platforms is a strong plus (HPE Nonstop experience ideal but not required).
  • Able to manage multiple activities/projects in a fast-paced environment.
  • Experienced using Git-based source control.
  • Experience building unit tests and meeting code quality standards.
  • Strong understanding of secure development practices, including handling of keys/certificates, memory safety, and protocol-driven security controls.
  • Familiarity with modern IDEs and toolchains for configuration, build, and development.
  • Understanding of REST APIs, Web Services, TCP/IP, and JSON, including fundamentals of secure network handshakes (TLS/SSL).
  • Knowledge of HPE Nonstop operating system and environment is a strong differentiating factor

Partner One Capital is a long-term investment group dedicated to acquiring and growing successful software companies. With a strong track record of ownership among some of the fastest-growing enterprise software firms, we empower over 2000 of the world's largest corporations and governments to enhance their critical operations and data security.

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