Principal Software Engineer – z/OS Connectivity

Redwood Software

. Build a new connectivity agent extending Redwood RunMyJobs natively onto IBM z/OS .

Posted 9/25/2026full-timeRemote • United StatesLeadWebsite

Tech Stack

Tools & technologies

DockerJavaKubernetesUnix

About the role

Key responsibilities & impact

Build a new connectivity agent extending Redwood RunMyJobs natively onto IBM z/OS
Design, develop, test, and maintain native software for IBM z/OS connectivity and integration
Build integrations with C/JNI, JES2/JES3, TSO background TMP, and SMF-based event monitoring
Integrate security and per-user authorization with Redwood’s identity and credential management
Develop systems-level capabilities involving custom wire protocols, cryptography, and native z/OS integration
Troubleshoot complex issues across mainframe, Unix, and Java environments
Improve reliability, performance, security, and scalability of mainframe solutions
Partner with product managers, architects, and engineers to translate customer requirements into technical solutions
Participate in architecture discussions, design reviews, code reviews, testing, and release planning
Use agentic AI for coding, testing, and documentation while verifying correctness against IBM z/OS references
Document protocols, security models, and platform prerequisites
Validate technical assumptions on live LPARs and contribute to architecture decisions
Contribute to quality, goals, and delivery commitments in an agile environment

Requirements

What you’ll need

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 and symmetric cipher modes
Strong concurrency and multithreading skills, with experience building resilient, long-running daemon processes
Ability to work effectively from primary technical sources, including IBM manuals and RACF/SMF references
Experience with modern DevOps practices and technologies, including Git, CI/CD, Docker, and Kubernetes
Fluency with AI tools in a production engineering environment
Strong code judgment involving specialized mainframe APIs and AI-generated recommendations
Proficiency in prompting AI tools and recognizing when tasks are too specialized for AI-assisted approaches
Ability to maintain an architectural focus on shared platform-integration designs
Workload automation product experience preferred
Sysplex/Parallel Sysplex clustering or z/OSMF REST API experience preferred
CA-Panvalet, CA-Librarian, or other JCL library tooling experience preferred
z/OS Assembler experience preferred; not a baseline requirement
Mainframe migration or modernization project experience preferred