Reverse Engineering and Code Refactoring
Logical refactoring of COBOL, RPG, PL/I and other code, transforming procedural code into maintainable and testable modular structures.

With over two decades of fintech expertise, CLPS combines a deep understanding of traditional financial logic with core technical mastery in Mainframe and AS/400 systems. We provide financial institutions with end-to-end consulting and implementation services, spanning technology upgrades, system optimization, digital transformation, and data migration.
For core system downsizing and migration, we offer lossless strategies and automated validation to ensure a smooth, controllable transition. Additionally, our CoreOptimizer.ai platform leverages AI to analyze COBOL and RPG code, identifying bottlenecks and redundant logic to deliver code-level optimization. This allows our clients to significantly reduce total costs throughout their transformation journey.
Logical refactoring of COBOL, RPG, PL/I and other code, transforming procedural code into maintainable and testable modular structures.
Simulating IBM Z and AS400 IO, transaction, encryption, RAS and other features in distributed/cloud-native environments to ensure no performance degradation after transformation.
Smooth migration to Linux, Kubernetes, distributed or cloud-native architectures, enhancing transaction processing capabilities and availability.
Structured parsing of legacy code such as COBOL/RPG/PL/I, generating call relationship diagrams, data flow diagrams, and business rule tables to solve the no-documentation problem.
Restoring decades of accumulated exception branches, boundary conditions, and historical compatibility logic through scenario replay and reverse engineering.
Locating performance bottlenecks such as excessively long batch processing windows and slow responses, identifying risks such as deep coupling, resource contention, and deadlocks, and outputting quantitative assessment reports.
Building business models covering normal, abnormal, and concurrent scenarios to provide a foundation for API-ization and event-driven transformation.
Using dual-run and gray-scale validation, CDC/log replication to ensure millisecond-level data consistency, compressing business downtime windows to minute-level.
Production traffic replay comparison, full-path scenario coverage testing, automatically generating visual difference reports.
Refactoring COBOL stored procedures into SQL/PL or application-layer code; optimizing performance through indexing, partitioning, and hot/cold tiering.
Connecting mainframe core systems to microservices grids and data middle platforms through API gateways and message queues, achieving API-ization and event-driven architecture.
Designing multi-active, primary-backup, and self-healing fault solutions in distributed environments, equivalent to or exceeding mainframe RAS features.
Natural disaster recovery capability formed during parallel operation of old and new systems, with second-level rollback to the old system possible if cutover fails.
Recording long-term real transactions from production environments and replaying them non-intrusively in the new system to validate performance SLAs.
Generating traceable reports through full-path coverage testing and difference comparison to meet financial industry compliance requirements.
Leveraging our global delivery network, we enable cross-time zone collaboration—adhering to unified global standards while accommodating local compliance requirements to optimize resource allocation. We provide end-to-end managed services, proactively identifying risks and capturing opportunities to help clients build cloud-native, microservices-based digital ecosystems—driving secure, efficient, and compliant digital transformation in a globalized environment.
Global Layout
Regional Headquarters:

Hong Kong, China
(Global Headquarters)
Contact Phone
+852 3707 3600
bd@clpsglobal.com
Office Address
10/F, Millennium City 3, No. 370 Kwun Tong Road, Kwun Tong, Kowloon, Hong Kong
24/7 Relay Development and Operations
Meeting local regulations for global clients
Proactive risk identification and opportunity capture
Building elastic, agile digital ecosystems
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