# Solution Technical Architect AS400

> Unison Group · Singapore, Singapore · Contract · Posted 2026-04-17

**Workplace:** on_site

**Department:** Manish

## Description

### **Role Overview**

We are looking for an experienced **Solution / Technical Architect** to lead large-scale **legacy modernization initiatives**, specifically migrating **AS400/Mainframe systems to Java-based Microservices architecture**. The ideal candidate will have deep expertise in designing scalable, cloud-native solutions and hands-on experience in end-to-end transformation programs.

### **Key Responsibilities**

-   Lead architecture and design for **AS400/Mainframe to Java Microservices migration programs**
-   Analyze existing legacy systems (RPG, COBOL, CL, DB2) and define modernization strategy
-   Design **target architecture** using Java, Spring Boot, Microservices, and APIs
-   Define migration approach: **re-platforming, re-hosting, refactoring, or re-engineering**
-   Drive **domain decomposition** and microservices design aligned with business capabilities
-   Collaborate with business stakeholders, product owners, and engineering teams
-   Ensure **high availability, scalability, and performance** in the new architecture
-   Define integration patterns using **Kafka, REST APIs, event-driven architecture**
-   Lead **data migration strategy** (DB2 to modern databases like PostgreSQL/Oracle)
-   Ensure adherence to **security, compliance, and enterprise architecture standards**
-   Provide technical leadership, governance, and mentorship to development teams
-   Support testing, deployment, and production rollout

### **Required Skills & Experience**

-   12+ years of IT experience with strong **architecture background**
-   Proven experience in **AS400/Mainframe modernization projects**
-   Hands-on expertise in:

-   AS400 / Mainframe (RPG, COBOL, JCL, DB2)
-   Java, Spring Boot, Microservices architecture
-   API design and integration

-   Experience with **cloud platforms** (AWS / Azure / GCP)
-   Strong understanding of **event-driven architecture (Kafka preferred)**
-   Experience with **containerization (Docker, Kubernetes)**
-   Strong knowledge of **data migration and transformation strategies**
-   Experience in **banking / payments / financial services domain** is highly preferred

## Apply

[Apply at Unison Group](https://apply.workable.com/unisongroup/j/384AA4DA3C/apply)

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