Principal Software Engineer – IBM i, AS/400 Connectivity

Redwood Software

. Build a new connectivity agent extending Redwood RunMyJobs natively onto IBM i (AS/400) .

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

Tech Stack

Tools & technologies

DockerJavaKubernetesTCP/IPUnix

About the role

Key responsibilities & impact

Build a new connectivity agent extending Redwood RunMyJobs natively onto IBM i (AS/400)
Design, develop, test, and maintain native software for IBM i connectivity and integration
Build native job submission and monitoring, spool file and message/data queue handling, and CL/RPG program invocation capabilities
Integrate IBM i functionality with the Redwood platform through versioned extension points using native host server APIs and/or IBM Toolbox for Java (JTOpen/jt400)
Integrate security and per-user authorization using IBM i user profiles and authority concepts
Troubleshoot system-level issues across IBM i, Unix, and Java environments
Improve reliability, performance, security, and scalability of IBM i 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 to accelerate implementation, testing, and documentation while verifying correctness against authoritative IBM i references
Document connector behavior and platform prerequisites for field and support teams
Contribute to quality, goals, and delivery commitments in a fast-paced agile environment

Requirements

What you’ll need

10+ years of professional software engineering experience with strong Java 8+ skills
Hands-on IBM i (AS/400) integration experience, including CL, native job/spool/queue APIs, IBM Toolbox for Java (JTOpen/jt400), and DB2 for i
Working proficiency in C, including ILE C on IBM i
Experience integrating with vendor host-server or RPC-style APIs over TCP/IP, including connection lifecycle management and error handling
Strong concurrency and multithreading skills, with experience building resilient, long-running monitoring components such as job polling and spool/file event detection
Ability to work effectively from primary technical sources, including IBM i host-server and API references, rather than relying solely on tutorials or unverified AI-generated output
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, including the ability to identify plausible but incorrect AI-generated recommendations involving specialized IBM i APIs
Proficiency in prompting AI tools, combined with the judgment to recognize when a task is too specialized for AI-assisted approaches
Ability to maintain an architectural focus, abstracting from individual API and connector details to shared platform-integration designs
Experience with workload automation products such as Tidal, CA-7, Control-M, Stonebranch, BMC, or RunMyJobs preferred
Experience with IBM i clustering or high-availability configurations preferred
Familiarity with advanced IBM i security concepts, including authorization lists and adopted authority, preferred
Background working with RPG/COBOL environments or IBM i modernization projects preferred
Mainframe or midrange migration project experience preferred