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Damco Solutions · 2 hours ago

AS400 / IBM i Application Architect

Madison, WI

Full-time

Hybrid

Senior Level, Lead/Staff

25+ years exp

Damco Solutions is seeking a highly experienced AS400 (IBM i) Application Architect to lead the architecture and modernization strategy for financial domain clients. The role involves deep expertise in the IBM i ecosystem, overseeing the integration and modernization of legacy AS400 applications into .NET-based platforms while ensuring compliance and performance.

Enterprise SoftwareInformation TechnologyInsuranceSoftwareSoftware EngineeringWeb Development

No H1B

Security Clearance Required

U.S. Citizen Only

Responsibilities

Own enterprise and solution architecture for IBM i (AS400) systems supporting financial processing

Assess the full system landscape: application inventory, dependencies, integrations, data flows, batch processes, and operational controls

Define target-state architecture connecting AS400 with .NET legacy systems, including integration standards, data governance, service boundaries, and security

Create key architecture deliverables such as HLD/LLD, sequence diagrams, integration contracts, deployment diagrams, and runbooks

Lead modernization from Synon/CA 2E and RPG toward modern services and user interfaces

Develop and drive a phased migration roadmap covering stabilization, encapsulation, modularization, service extraction, and selective re‐platforming

Make refactoring decisions that preserve transaction integrity, auditability, performance SLAs, and batch window constraints

Define coding standards for RPGLE/CLLE/SQL and service/API interfaces

Lead performance tuning across DB2, queries, batch parallelization, and job orchestration

Improve DevOps/ALM practices including version control, build/release automation, and regression test frameworks

Ensure systems meet federal public trust security requirements, including least privilege, segregation of duties, logging, and secure data handling

Support audits through evidence gathering such as access logs, change logs, and approval trails

Collaborate with security teams on vulnerability management and remediation

Translate complex legacy constraints into clear modernization strategies for business and technical stakeholders

Align architecture plans with product, compliance, and operational priorities

Mentor senior developers and lead technical design reviews and architecture sessions

Qualification

IBM i / AS400 architectureSynon / CA 2ERPG/ILEDB2 for iIntegration with .NETFinancial domain experienceSQL on IBM iBatch & online processingSoft skills

Required

Work Authorization: USC and GC

Active Public Trust Clearance – 6C (required)

25+ years total IT experience

15+ years of relevant hands-on experience designing, building, modernizing, or governing IBM i (AS400) enterprise systems

Synon / CA 2E experience (mandatory) – deep hands-on: model-driven generation, impact analysis, modernization planning, and refactoring strategies

Significant experience with financial domain systems

Demonstrated experience bridging AS400 to .NET legacy systems (integration, coexistence, refactor, re-platform, or phased migration)

IBM i / AS400 platform architecture: subsystem design, job queues, memory/storage planning, object-level security

DB2 for i: schema design, query tuning, indexing strategy, journaling, commitment control

Batch & online processing: job scheduling, workload management, throughput tuning for high-volume financial processing

SQL on IBM i: embedded SQL, stored procedures, optimization and performance diagnostics

CA 2E/Synon model maintenance, generation cycles, and customization

Impact analysis for model changes; regeneration strategy

Integrate IBM i applications and services with .NET solutions through APIs, service layers, messaging, and ETL feeds

Implement data synchronization and coexistence strategies between IBM i and .NET systems