MMS/RPG Engineer

CapNexus; Florida City (FL); Remote; USD 120,000 - 160,000; Full time

Benefits offered by this job

Medical

Dental

401(k)

Job summary

CapNexus is seeking a hands-on Blue Yonder (JDA) / RPG Consultant to support a major retail client. This role focuses on Blue Yonder MMS, IBM i, RPG development, DB2 for i, integrations, troubleshooting, and system enhancements.

We’re looking for someone who can work directly within the MMS environment and independently deliver technical solutions, rather than primarily functional or end-user support.

Qualifications

• 5+ years of professional software engineering experience.

Responsibilities

• Build and maintain IBM i apps in free-format RPGLE, SQLRPGLE, and CL with ILE concepts.
• Work with DB2 for i via SQL, DDS, and handle physical/logical files and subfiles.
• Integrate IBM i apps with web services, JSON/XML, FTP, and the IFS.
• Support changes through testing, deployment, and post-deployment, and resolve issues directly with client teams.
• Set coding and testing standards for IBM i work, and identify modernization opportunities.
• Own the technical outcome for a system area or major feature set: propose the approach, define the task breakdown, and deliver with minimal escalation.
• Design APIs and data models that account for cost, scale, and failure, and build observability from the start.
• Work with Cloud Engineers on infrastructure as code and CI/CD so deployments are repeatable.
• Partner with the Solutions Architect on design and with the Engagement Manager on delivery, turning designs into a build plan.
• Set code-quality standards and mentor Software Engineers I and II through pairing and reviews that teach, including how to direct AI tooling and check outputs.
• Join architecture presentations and technical deep-dives alongside the Solutions Architect when depth is needed.

Skills

Software architecture

CI/CD

Spec-driven development

Mentoring engineers

IBM i RPG

DB2 for i SQL

API design

Observability

AI tooling

Tools

Blue Yonder MMS

IBM i Access Client Solutions

iSeries Navigator

IFS

JSON

XML

AWS

Job description

Specialization: IBM i / RPG I Location: Remote (US)

CapNexus is an AWS consulting partner specializing in AI and cloud engineering. We build and deliver software through agentic engineering: we build and operate the systems that produce code, direct AI tooling to accelerate delivery, and exercise the judgment that keeps AI-generated work correct. Everyone at CapNexus works fluently inside our delivery system, which combines agentic tooling, spec-driven development, evidence-based quality, and AI-augmented delivery governance.

Who You Are and What You'll Do:

CapNexus is looking for a hands-on Blue Yonder (JDA) / RPG Consultant to support a major retail client. This is a technical consulting role focused on Blue Yonder/JDA MMS, IBM i, RPG development, DB2 for i, integrations, troubleshooting, and system enhancements.

We’re looking for someone who can work directly within the MMS environment and independently deliver technical solutions, rather than primarily functional or end-user support.

Responsibilities:

• Build and maintain IBM i applications in free-format RPGLE, SQLRPGLE, and CL, using ILE concepts such as procedures, service programs, and modules.
• Work with DB2 for i through SQL and DDS, including physical and logical files and subfiles.
• Integrate IBM i applications with other systems through web services, JSON and XML, FTP, and the Integrated File System (IFS).
• Support changes through testing, deployment, and post-deployment, and resolve technical issues directly with client teams.
• Set coding and testing standards for IBM i work, and identify where modernizing an application pays off.
• Own the technical outcome for a system area or major feature set: propose the approach, define the task breakdown, and deliver with minimal escalation.
• Design APIs and data models that account for cost, scale, and failure, and build in observability (logging, tracing, and metrics) from the start.
• Work with Cloud Engineers on infrastructure as code and CI/CD so what you build deploys the same way every time.
• Partner with the Solutions Architect on solution design and with the Engagement Manager on delivery, and turn designs into a build plan the team can execute.
• Set code-quality standards for your area, and mentor Software Engineers I and II through pairing and reviews that teach, including how to direct AI tooling and check what it produces.
• Join architecture presentations and technical deep-dives alongside the Solutions Architect when the client needs your depth.

How You'll Work: Agentic Engineering:

You own outcomes on complex work, exercise architectural judgment, and raise the bar for those around you.

• Agentic tooling. Set the tooling approach for a codebase or engagement: which work goes to a conversion engine, which is spec-driven build, where the human-in-the-loop gates belong, and how the toolchain is wired for the problem at hand.
• Spec validation and readiness. Own the quality of the handoff from specification to build. Make sure specs are executable and actually satisfy the requirements, and hold delivered work to a defined readiness bar. When generated code is wrong, fix the spec, not just the output.
• Validating AI output. Be the final judgment on correctness for high-risk changes, including in unfamiliar domains, by designing the evidence that proves behavior is preserved.
• Delivery-system ownership. Design and maintain the project-specific setup of our delivery tooling (steering, agent roles, templates, quality gates, and metrics) as durable capability, not one-off scaffolding.

Judgment over correctness:

you can tell when confident, plausible-looking AI output is quietly wrong. Tooling does the mechanical work; you're accountable for whether it's right.

Qualifications:

• 5+ years of professional software engineering experience.
• A strong grasp of architecture concepts: event-driven and service-based design, API design, data modeling, separation of concerns, and designing for change.
• Experience owning a significant system from design through production, and mentoring the engineers who built it with you.
• Working knowledge of CI/CD and infrastructure as code.
• Hands-on experience with spec-driven or agentic development workflows, where specs drive code generation, for example Kiro, Claude Code, Amazon Q Developer, or Cursor with rules. Using AI only for autocomplete or snippets doesn't count.
• A track record of catching what AI-generated or refactored code gets quietly wrong, and of building the tests and gates that prove behavior is preserved.
• Hands-on experience programming on IBM i (AS/400, iSeries): free-format RPGLE, SQLRPGLE, CL, and OS/400 commands.
• Strong SQL skills on DB2 for i, plus working knowledge of DDS, subfiles, and older RPG (RPG III and fixed format).
• Experience with IBM i Access Client Solutions or iSeries Navigator, the IFS, and JSON and XML. |
• Experience with Blue Yonder (JDA) MMS.

Nice to Have:

• Experience with AWS or application modernization, such as integrating IBM i applications with AWS services or moving IBM i workloads to modern platforms.
• Experience with Java, including Java on IBM i or RPG-to-Java modernization.
• Experience supporting IBM i in an enterprise data center.
• Background in retail.

Our Culture:

• Customer obsessed, delivery focused. We deliver what we promise. Trust = consistency × time.
• Learning and sharing. We hire lifetime learners, and teaching others matters as much as knowing.
• Growth and scalability. We value cross-functional skills over role boundaries, and simple solutions over clever ones.
• All work is strategic. Every engagement, big or small, is a chance to earn trust that lasts.

We offer:

Job Type: Full-time

• Medical
• dental
• 401(k)
• and more

CapNexus is an equal opportunity employer. We embrace and celebrate diversity and are committed to creating an inclusive and safe environment for all employees. Experience comes in many forms, and we’re dedicated to adding new perspectives to the team. We encourage you to apply even if your experience doesn’t perfectly align with what we have listed. We look forward to hearing from you.