The role involves leading modernization initiatives, migrating AS400/Mainframe systems to Java Microservices, designing scalable architectures, and collaborating with stakeholders.
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
- 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
Top Skills
APIs
As400
AWS
Azure
Cobol
Db2
Docker
GCP
Java
Jcl
Kafka
Kubernetes
Mainframe
Microservices
Oracle
Postgres
Rest Apis
Rpg
Spring Boot
Unison Consulting Singapore Office
1 Changi Business Park Crescent, , Plaza 8 #03-06 Tower A, Singapore, , Singapore, 486025
Unison Consulting Singapore Office
#12-00, 63 Market Street, Bank of Singapore Center, Singapore, , Singapore, 048942
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