Technical Business Analyst (AS 400 / SICS)

TECH AALTO PTE. LTD.; Singapore; On-site; SGD 80,000 - 100,000; Full time

Job summary

A tech solutions provider in Singapore is seeking an experienced Technical Business Analyst to support a core banking migration program. The ideal candidate will have over 8 years of experience with AS400 technologies and will focus on analysing existing systems and producing detailed technical documentation. This role is business-technical hybrid with no hands-on development required.

Qualifications

• 8+ years of experience working with AS400 technologies.
• Strong experience analysing AS400-based applications in banking environments.
• Proven capability in reverse engineering legacy systems and producing documentation.

Responsibilities

• Analyse existing AS400 environment, including applications and workflows.
• Perform reverse engineering and document system behaviour and process flows.
• Work with architects and vendor teams on migration to a COTS platform.

Skills

AS400 technologies

Analytical thinking

Problem-solving

Communication skills

Reverse engineering

Job description

Job Title: Technical Business Analyst (AS400 / SICS)

Location: Singapore (onsite)
Experience: 8+ years
Role type: Contract

Role Overview

We are seeking experienced Technical Business Analysts with strong AS400 expertise to support a major core banking migration program. This role focuses on analysing the existing AS400-based systems, performing reverse engineering, and producing detailed technical and functional documentation to support the transition to a new COTS platform.

This is a business–technical hybrid role with no hands-on development, but deep technical understanding of AS400 applications, file structures, and integrations is essential.

Key Responsibilities

• Analyse the existing AS400 environment, including applications, programs, data models, database structures, and system workflows.
• Perform reverse engineering of legacy AS400 components to understand current functionality, logic, and dependencies.
• Document AS400 system behaviour, process flows, file mappings, data mappings, integration points, and business rules.
• Work closely with architects, product teams, and vendor teams involved in the migration to a COTS platform.
• Review legacy jobs, CL programs, RPG logic (read-only), file definitions, and batch processes to capture functional and technical details.
• Translate technical findings into clear, structured documentation for migration and development teams.
• Participate in walkthroughs, requirement clarification sessions, and solution discussions to ensure accurate understanding of the current system.
• Support gap analysis, impact assessment, and mapping of legacy functionalities to new COTS product capabilities.
• Act as a bridge between business, technology, vendor teams, and migration specialists.
• Ensure documentation quality and completeness to support seamless knowledge transfer.

Must-Have Skills & Experience

• 8+ years of experience working with AS400 technologies (CL, RPG, DB2/400 concepts, job scheduling, file structures).
• Strong experience analysing AS400-based applications in financial services or banking environments.
• Proven capability in reverse engineering legacy systems and producing detailed documentation such as:
• File mappings
• Data flow diagrams
• Functional flows
• Technical specifications
• Interface documentation
• Ability to interpret AS400 components without performing actual development.
• Strong understanding of core banking processes, batch jobs, data models, and system dependencies.
• Excellent analytical thinking, problem-solving, and communication skills.
• Ability to work independently and manage ambiguity typical in migration projects.

Good-to-Have Skills

• Knowledge or experience with SICS (Silverlake Integrated Card System).
• Experience working on core banking migration projects (legacy-to-COTS).
• Understanding of card systems, payments, or transaction processing.
• Exposure to vendor-driven implementations (Temenos, Silverlake, Finastra, etc.).

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