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I will build java spring boot rest apis for your saas
HARMANPREET
About this gig
Need a production-ready Java Spring Boot REST API or backend module?
I build clean, maintainable backend features for SaaS and web applications.
I CAN HELP WITH
REST API design and CRUD endpoints Business logic and request validation PostgreSQL or MySQL persistence Database entities and relationships Third-party REST API integration Exception handling and testing Docker configuration and deployment support
You receive the agreed source code, validation, error handling, configuration notes, and a concise handoff.
I built Dervale, a production-oriented multi-tenant AI gateway using Spring Boot, React, PostgreSQL, Redis, and Docker. Its backend includes routing, authentication, API keys, usage controls, caching, logging, and automated testing.
Each package covers a defined number of endpoints or one bounded backend modulenot an entire SaaS platform. Complex security, AI, or multi-module builds are scoped separately.
Send your endpoint list, data model, stack, and expected behavior before ordering.
Get to know HARMANPREET
HARMANPREET
Java Spring Boot Backend and Full Stack Developer
- FromIndia
- Member sinceJul 2026
- Avg. response time1 hour
Languages
English, Punjabi, Hindi, German
Backend and full-stack developer building reliable SaaS products, REST APIs, web apps, and AI integrations with Java, Spring Boot, React, PostgreSQL, Redis, and Docker.
I can help with Spring Boot backends, REST APIs, SaaS/MVP development, React apps, authentication and RBAC, databases, third-party APIs, AI/LLM integrations, debugging, testing, and deployment.
I built and deployed Dervale, a multi-tenant AI gateway with routing, API keys, usage controls, caching, observability, billing, and automated testing.
Send me your requirements and I’ll recommend the best approach.
My Portfolio
Other Software Development Services I Offer
FAQ
Can you build a complete Spring Boot backend?
Yes. I can build larger Spring Boot backends involving REST APIs, databases, authentication, integrations, testing, and deployment. Larger projects may require a custom offer based on the exact scope.
What information should I send before ordering?
Please send your required features, number of endpoints, database requirements, authentication needs, existing codebase or tech stack, integrations, and expected deadline. If you have API documentation or designs, include those as well.
Do you work with existing Spring Boot projects?
Yes. I can add new features, REST endpoints, database functionality, integrations, authentication, or fixes to an existing Java/Spring Boot codebase.
Can you integrate PostgreSQL or MySQL?
Yes. Database integration is available depending on the selected package. I can work with PostgreSQL or MySQL and implement entities, repositories, relationships, validation, and persistence logic.
Can you implement authentication and authorization?
Yes. I can implement JWT-based authentication, authorization, protected endpoints, and role-based access depending on the requirements and package scope.
Can you integrate third-party or AI APIs?
Yes. I can integrate external REST APIs and AI/LLM providers into Spring Boot applications. Send me the API documentation and required workflow so I can confirm the scope.
What counts as one API endpoint?
An endpoint is one defined API operation such as creating, retrieving, updating, or deleting a resource. Complex business logic or integrations may require additional scope even if they use a small number of endpoints.
Should I contact you before placing an order?
Yes. Please message me first, especially for existing codebases, authentication, database work, integrations, or larger backend systems. This helps ensure you select the correct package and prevents scope misunderstandings.
