Principal Software Engineer – IBM z​/OS Connectivity

At Redwood, we empower our customers with lights-out automation for their mission-critical business processes.

Redwood Software is the leading orchestration platform for the autonomous enterprise, driving business transformation at the lowest total cost of ownership. Redwood empowers organizations to intelligently automate and orchestrate mission-critical business and IT processes across complex ERP, hybrid cloud, data and emerging agentic AI systems. Through its SaaS-first automation fabric—with AI embedded across the automation lifecycle—Redwood accelerates the path to autonomous operations.

Backed by 30 years of experience and trusted by more than 50% of the Fortune 50, Redwood helps organizations unlock human potential to focus on innovation, growth and what’s next.

One Team. One Redwood Make Your Own Weather Obsess over Customer Success Work the Problem Be Curious Own the Outcome Respect Each Other

As a Software Engineer – Principal, IBM z/OS Connectivity, you will help build a new connectivity agent that extends Redwood Run My Jobs  (RMJ) natively onto IBM z/OS, enabling Redwood to support some of the largest enterprise automation environments in the market. You will work on systems-level engineering spanning custom wire protocols, cryptography, and a native platform bridge into JES, RACF/SAF, SMF, TSO, and z/OS UNIX System Services (USS), delivered as a Java agent that integrates with the Redwood platform through clean, versioned extension points.

This position is open across levels from Software Engineer to Principal as we build out the team.

• Design, develop, test, and maintain native software supporting connectivity and integration with IBM z/OS mainframe environments.
• Build integrations with core mainframe technologies, including C/JNI, JES2/JES3 job submission and monitoring, TSO command execution via background TMP, and SMF-based event monitoring.
• Integrate security and per-user authorization while extending Redwood’s existing identity and credential management capabilities.
• Develop and maintain systems-level capabilities involving custom wire protocols, cryptography, and native z/OS platform integration.
• Troubleshoot complex system-level issues across mainframe, Unix, and Java environments.
• Improve the reliability, performance, security, and scalability of Redwood’s mainframe solutions.
• Partner with product managers, architects, and engineers to translate customer requirements into effective technical solutions.
• Participate in architecture discussions, design reviews, code reviews, testing, and release planning.
• Leverage agentic AI to accelerate codec, testing, and documentation work while independently verifying correctness against authoritative IBM z/OS references.
• Document protocols, security models, and platform prerequisites for field and support teams.
• Validate technical assumptions on live LPARs and contribute to architectural decisions where modern documentation may be limited.
• Contribute to team success through clear communication, shared responsibility for quality, and accountable ownership of goals and delivery commitments in a fast-paced, iterative agile environment.

• 10+ years of professional software engineering experience with strong Java 8+ skills; IBM Semeru or z/OS Java experience is a plus.
• Hands-on z/OS systems integration experience, including JES2/JES3, TSO, RACF/ACF2/Top Secret, SMF, and USS.
• Strong working proficiency in
  
  C.
• Low-level network protocol experience, including socket programming, custom binary framing, character-encoding conversion, and TLS/keyring security.
• Hands-on experience implementing cryptographic primitives to specification using standard libraries such as Java JCE, including key exchange…