CapNexus AS/400 Transform Custom RPG to Cloud-Native on AWS

The RPG Gap — Solved. AWS Transform for Mainframe addresses COBOL and PL/I on IBM z/OS. CapNexus fills the adjacent $9B gap: RPG on IBM i (AS/400) — the platform powering mission-critical workloads for thousands of retailers, manufacturers, distributors, and financial institutions worldwide.

With zero competitors doing RPG-to-Java conversion at enterprise scale, CapNexus delivers a first-of-its-kind automated modernization pipeline built natively on AWS Transform Custom, Strands Agents SDK, and Amazon Bedrock (Claude Sonnet).

Three Ways to Modernize — Start Anywhere Infrastructure Move: Exit your data center, eliminate facility overhead, and convert CapEx to predictable OpEx — without touching a single line of application code. Includes colocation or managed hosting with a 99.99% SLA.

Integration Mesh: Connect your AS/400 to cloud analytics, AI, and automation wherever the system lives. Replace batch extracts with real-time data sync, unlock cloud capabilities, and de-risk future transformation — no app changes required.

Transformation Modernize: Convert RPG applications to production-grade Spring Boot microservices on AWS, wave by wave, with full business logic preserved. Output: Spring Boot on ECS Fargate, Aurora PostgreSQL, React front-end, and AWS CDK infrastructure-as-code.

The Pipeline The CapNexus AS/400 Transform Custom pipeline executes 10 discrete, verifiable stages — Classification, Discovery, Architecture, Schema Migration, Code Conversion, Refinement, Validation, Front-End Specification, Infrastructure Generation, and Go-Live — all orchestrated by a Master Strands Agent with automatic retry and rollback. Every engagement feeds back into the pipeline, making each subsequent conversion faster and more accurate.

Supported Inputs: ILE RPG (free and fixed format), SQL RPG, RPG III/OPM, DDS physical/logical files, DB2 for i, 5250 display files and subfiles.