AS400 Architect

EPAM Systems; Maharashtra; On-site; INR 2,600,000 - 4,800,000; Full time

Job summary

EPAM Systems is seeking a seasoned AS/400 Architect to shape the technical vision for our IBM iSeries modernization program at enterprise scale. You will define standards, roadmaps, and modernization approaches across code, data, and UI, collaborating with AI Tools and client teams to enhance analysis and documentation.

The role requires substantial hands-on experience with RPG, COBOL, SQL, and Db2 for i, plus strong stakeholder management and governance capabilities to ensure regulatory and

Qualifications

• 13+ years of experience in enterprise midrange (iSeries/AS/400) technologies.
• 5+ years focused on analysis, reverse engineering, and modernization solutions.
• Hands-on development, maintenance, and refactoring of legacy apps.

Responsibilities

• Define architectural vision and roadmap for AS/400 modernization.
• Analyze applications to assess quality, debt, and modernization readiness.
• Collaborate with teams to refine AI-driven documentation and code insights.
• Ensure compliance with enterprise architecture standards and security policies.

Skills

RPG III

RPG IV

RPGLE

Free-format RPG

CL/CLLE

COBOL

DDS/DSPFs

SQL

Db2 for i

IBM i architecture

Reverse engineering

API enablement

Web services

UI modernization

Cloud migration

Re-platforming

Tools

None

Job description

We are looking for a seasoned AS/400 Architect to define the technical vision and architectural direction for the AI Tools team, shaping EPAM's in-house solution for IBM iSeries (AS/400) application reverse engineering, analysis, and modernization at an enterprise scale.

Responsibilities

• Define the architectural vision, standards, and technical roadmap for the IBM iSeries (AS/400) reverse-engineering and modernization solution
• Conduct application portfolio analysis to identify redundant, unreachable, duplicated, obsolete, tightly coupled, and highly complex code, and assess application quality, maintainability, performance, technical debt, modernization readiness, and potential risks
• Analyze legacy IBM AS/400 applications, identify dependencies and business rules, trace data flows, document application behavior, and assess undocumented or complex codebases
• Drive IBM AS/400 modernization approaches, including code refactoring, format conversion, database modernization, API and web-service enablement, UI modernization, application decomposition, cloud integration, re-platforming, and application retirement
• Collaborate with the AI Tools team to define requirements, validate analysis logic, improve prompts and rules, and enhance the accuracy of AI-generated application documentation and code insights
• Architect AI capabilities for program understanding, dependency discovery, business-rule extraction, data-flow analysis, impact analysis, code summarization, test-case generation, and modernization recommendations
• Contribute to technical assessments, proofs of concept, solution demonstrations, effort estimation, project planning, risk identification, progress reporting, and executive-level presentations
• Partner with customer IBM i SMEs, application owners, business analysts, modernization specialists, AI Tools team members, testing teams, cloud architects, and Technical Leadership across the client and EPAM organizations
• Ensure that the reverse-engineering and modernization solution complies with enterprise architecture standards, customer security policies, source-code handling requirements, data-protection controls, audit requirements, and applicable regulatory obligations

Requirements

• 13+ years of experience in enterprise midrange (iSeries or AS/400) technologies, with 5+ years focused on application analysis, reverse engineering, and modernization solutions
• Expertise in RPG III, RPG IV, and RPGLE, including hands-on development, maintenance, and refactoring of large-scale legacy applications
• Proficiency in free-format RPG, CL/CLLE, and COBOL, with the ability to analyze and convert fixed-format code to modern equivalents
• Skills in DDS, DSPFs, and SQL, including designing, interpreting, and optimizing display files, physical/logical files, and complex queries
• Background in Db2 for i, covering database design, performance tuning, journaling, stored procedures, triggers, and DDS-to-DDL conversion
• Understanding of IBM i architecture, including libraries, objects, service programs, printer files, commitment control, and integrated file systems
• Knowledge of reverse engineering techniques for legacy AS/400 applications, including dependency mapping, business-rule extraction, and data-flow tracing
• Familiarity with modernization strategies such as API enablement, web-service integration, UI modernization, application decomposition, cloud migration, and re-platforming
• Competency in application portfolio assessment, technical debt evaluation, code quality analysis, and modernization readiness reviews
• Capability to collaborate with AI Tools teams by defining requirements, validating analysis logic, refining prompts, and improving AI-generated documentation and code insights
• Flexibility to support delivery activities, including proofs of concept, effort estimation, project planning, risk identification, and executive-level presentations
• Showcase of strong stakeholder management skills to engage IBM i SMEs, application owners, business analysts, cloud architects, and technical leadership across client and internal organizations
• Qualifications in governance and compliance, ensuring adherence to enterprise architecture standards, security policies, data-protection controls, and regulatory obligations
• Proficiency in English at an Upper-Intermediate level (B2) or higher