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I will build and integrate java spring boot rest apis
Nishant K
About this gig
Need a reliable Java Spring Boot REST API?
I will build, fix, or integrate REST APIs for your web or business application using Java and Spring Boot.
What I can help with:
- REST API development
- API integration
- Spring Boot backend
- Database integration
- Authentication & validation
- API bug fixing
- Swagger/OpenAPI documentation
- Unit & integration testing
I have 9+ years of experience building enterprise Java and Spring Boot applications, microservices and backend systems.
Message me before ordering and share your requirements. I'll review them and suggest the best approach.
Get to know Nishant K
Nishant K
Senior Java Spring Boot Developer Microservices AI
- FromIndia
- Member sinceAug 2026
- Avg. response time1 hour
Languages
English
Senior Java & Spring Boot Developer with 9+ years of experience building scalable, production-ready applications for Banking, Fintech, Wealth Management, Logistics and Pricing.
I specialize in Java 8–21, Spring Boot, Microservices, REST APIs, Kafka, gRPC, React, Azure, Kubernetes, Docker and CI/CD. I also build AI-powered solutions using Spring AI, LLMs, RAG and Prompt Engineering.
I focus on clean architecture, performance, scalability and reliable delivery.
Need to build, fix, modernize or optimize your application? Let’s discuss your project.
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FAQ
Can you compare data from two different APIs?
Yes. I can integrate two or more APIs and compare their records based on transaction IDs, account numbers, dates, amounts, or your custom business rules.
Can you compare Excel or CSV files?
Yes. I can build Excel/CSV upload and processing functionality and compare the data with another file, API, database, or system.
Can you show exactly which fields are different?
Yes. The system can identify field-level differences such as amount, quantity, currency, country, dates, account type, and other fields you specify.
Can you build a dashboard for the reconciliation results?
Yes. I can build a React dashboard showing matched, mismatched, missing records, comparison details, filters, summaries, and reports.
Can you integrate my existing API or backend system?
Yes. I can work with existing REST APIs, gRPC services, databases, and microservices and integrate them into the reconciliation workflow.
What do you need from me to start?
Please provide your requirements, sample data, API documentation or access details, fields to compare, and any specific reconciliation rules. If you're unsure, send what you have and I can help define the approach.
