Contact person: Business Client

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Location: Riyadh, Saudi Arabia

Budget: Recommended by industry experts

Time to start: As soon as possible

Project description:
"Project Title:

Code Review & Improvement for Java Spring Boot State Machine Implementation

Project Description:

I’m looking for an experienced Java developer with strong expertise in Spring Boot and the Spring State Machine framework to review and enhance my existing implementation of a Payment Hub system.

The project integrates with multiple external systems (X, Y, and Z) and uses Spring State Machine to manage the payment execution flow and state transitions.

The main objective is to ensure that the system can handle high transaction traffic efficiently and process all payments smoothly and reliably under load.

I’m seeking someone who can:

Review the current code architecture and state machine setup.

Assess the performance, scalability, and fault tolerance of the design.

Recommend and help implement improvements for concurrency and throughput.

Ensure the solution follows enterprise-grade best practices for high-volume systems.


Tech Stack:

Java 21

Spring Boot 3

Spring State Machine 4

SOAP & REST integrations

JPA / Hibernate


What I Expect:

A detailed code review and architecture assessment.

A clear list of actionable improvement suggestions.

(Optional) Hands-on assistance in implementing the proposed enhancements.


Ideal Candidate:

Strong background in Java and Spring ecosystem.

Proven experience with Spring State Machine.

Knowledge of scalable architecture design and high-throughput systems.

Familiarity with SOAP and REST-based integrations.

Budget:

Flexible — based on experience and scope of review.

Timeline:

Expecting an initial review and recommendations within 3–5 days." (client-provided description)