Spring Boot Developer – Microservices Stabilization, Integration & Testing Project Details

₹1500-12500 INR

In Progress

Posted 21 days ago

₹1500-12500 INR

Paid on delivery

Project Details 1. Project Overview(Backend Microservices System (SPRING FRAMEWORK ONLY)) We are developing a large-scale, enterprise-level digital commerce platform on a Java-based microservices architecture (Spring Ecosystem). The development phase is "LARGELY COMPLETED". We are not looking for a builder to start from scratch, but rather a "finisher"—a skilled Backend Engineer to take ownership of the existing codebase. The primary goal is to validate current integrations, stabilize the logic, and ensure the system is production-ready through rigorous testing. WE WILL PROVIDE TESTING HELP FROM OUR SIDE TOO. 2. Current Project Status & Scope The following microservices have been developed. Your role is to ensure these services communicate seamlessly, handle edge cases, and meet performance benchmarks. - Databases created/connected and working properly. - User Service: (Status: Fully Done/Verified) – No further development required. - Product, Cart, Order Management, Payment,Return/Refund Service and Analytics Services: (Status: Code Complete)– These services require logic verification, edge-case handling, and stabilization. 3. Stabilization & Integration Focus We require a developer to focus specifically on the following "stabilization" tasks: - Workflow Stabilization: Review and refine the cross-service communication (REST/Feign) to ensure the flow from Product selection to Order fulfillment and Payment is foolproof. - Transactional Integrity: Ensure ACID compliance across microservices, specifically handling distributed transactions and rollback scenarios during payment or inventory failures. - Third-Party Integrations: Finalize and test integrations with external logistics/delivery APIs and payment gateways. - Security Audit: Verify JWT-based authentication and Role-Based Access Control (RBAC) across all newly stabilized endpoints. - Testing Suite: Implement comprehensive JUnit and Mockito test suites to ensure 90%+ code coverage and system reliability. 4. Technical Stack Requirements(Strictly applied) - Language: Java (Latest LTS) - Framework: Spring Boot, Spring Security, Spring Data JPA, Spring Cloud. - Architecture: Microservices with RESTful APIs. - Database: MySQL with complex schema management. - Security: JWT, OAuth2. 5. Non-Functional Requirements - Scalability: Code must be cloud-ready and optimized for high concurrency. - Observability: Comprehensive logging (SLF4J/Logback) and standardized error handling. - Code Quality: Strictly following SOLID principles and clean code practices. 6. Deliverables - Stabilized Source Code: Fully functional, integrated microservices. - Test Reports: Successful execution of unit, integration, and load tests. - Updated API Docs: Complete Swagger documentation for all integrated services. - Deployment Guides: Updated environment configuration and setup instructions. PLEASE NOTE: MAX BUDGET 12K, YOUR BIDDING PRICE WILL BE CONSIDERED YOUR FINAL PRICE. NO NEGOTIATIONS WILL BE ENTERTAINED AFTER YOU BID.

Software Architecture

Project ID: 40401187

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8 proposals

Remote project

Active 21 days ago

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Awarded to:

@abhayk49

Hi, I’m a Java backend developer with strong experience in Spring Boot microservices and system stabilization, especially in taking near-complete systems to production-ready quality. ✅ Relevant Expertise ✅ Java (LTS) & Spring Boot / Spring Cloud ✅ Microservices (REST, Feign communication) ✅ JPA / MySQL & transaction handling ✅ JWT / OAuth2 & RBAC security ✅ Payment & third-party integrations ✅ JUnit, Mockito (high test coverage) ✅ Logging, performance & observability ? How I Can Help • Stabilize end-to-end workflows (Product → Cart → Order → Payment → Refund) • Fix inter-service communication & edge cases • Ensure transaction consistency & rollback handling • Finalize payment/logistics integrations • Perform security audit (JWT/RBAC) • Add 90%+ test coverage and improve logging/monitoring ✔ Deliverables ✔ Fully stabilized and integrated microservices ✔ Test reports (unit & integration) ✔ Updated Swagger documentation ✔ Deployment & configuration guide I focus on clean architecture, reliability, and production stability. I’m comfortable working within the defined budget and can start immediately. Best regards, Abhay

₹11,000 INR in 7 days

5.0

(13 reviews)

3.7

8 freelancers are bidding on average ₹10,000 INR for this job

@SmartCodeDev

Hello, I can take ownership of your Spring microservices and bring the system to a stable production ready state within your budget. I have strong experience with Java Spring Boot microservices, distributed systems, and enterprise level commerce platforms. I will review and stabilize all service interactions to ensure smooth flow from product to order to payment. I will implement proper handling for distributed transactions and rollback scenarios to maintain data integrity. Third party integrations with payment and logistics APIs will be fully tested and secured. I will audit and strengthen JWT authentication and RBAC across all services. Comprehensive JUnit and Mockito test coverage will be added to reach your reliability goals. I will ensure clean code standards, logging, error handling, and performance optimization. You will receive stabilized code, test reports, updated Swagger docs, and deployment guides. Ready to start immediately and finalize your system efficiently.

₹12,000 INR in 7 days

5.0

(12 reviews)

4.9

@gloifytech

Hi, This is clearly a stabilization and production-readiness phase, and I’m well aligned with this kind of work on Spring-based microservices. I can take ownership of your existing codebase and focus on ensuring seamless service communication, transactional integrity, and system reliability. I’ll review REST and Feign interactions end to end to stabilize flows from product to order to payment, including proper handling of edge cases and failure scenarios. For distributed transactions, I will ensure consistent behavior using appropriate patterns and rollback handling during payment or inventory issues. I’ll also validate and finalize third-party integrations, including logistics and payment gateways. Security will be audited thoroughly, covering JWT, RBAC, and endpoint protection. Alongside this, I will implement a strong JUnit and Mockito test suite targeting high coverage and reliability. I follow clean architecture, SOLID principles, and ensure proper logging, error handling, and observability. Deliverables will include stabilized services, test reports, updated Swagger docs, and deployment guidance. Comfortable with your budget and ready to start immediately.

₹10,001 INR in 5 days

0.0

(0 reviews)

0.0

@EliasDelgado

I develop and lead a full stack spring boot and Angular microservices architecture, i understand the situation. You need to scale fast and have more than simple implementations, I can do that for you

₹12,000 INR in 10 days

0.0

(0 reviews)

0.0

@rahulg051

Hi, You don’t need another developer—you need someone who can take ownership of a nearly complete system and make it production-ready. That’s exactly where I fit. Most microservices projects don’t fail because of missing features—they fail due to weak service coordination, edge-case gaps, and inconsistent transaction handling. I’ve worked on backend systems where fixing these exact issues was critical before release. I’m comfortable stepping into an existing Spring-based microservices setup and tightening everything that matters: • Ensuring smooth, reliable flow across services end-to-end • Fixing edge cases that break real-world scenarios • Handling transaction consistency to avoid partial failures • Verifying security flows across all endpoints • Strengthening test coverage so the system remains stable I don’t approach this as “task completion”—I treat it as system ownership, making sure everything works reliably under real usage, not just in ideal conditions. If you’re looking for someone who can quickly understand the system, identify hidden gaps, and bring it to a solid, production-ready state, I’m ready to take that responsibility. Best regards, Rahul

₹7,000 INR in 14 days