Spring Boot foundations and boilerplates

Modular, AI-Ready Spring Boot Boilerplates

Production-ready foundations that help developers ship faster without rebuilding backend infrastructure.

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Open-source foundation

Inspect a real Spring Boot authentication foundation

AuthKit-Lite provides a reusable Spring Security and JWT foundation with refresh tokens, role-based access, and ready-to-test authentication APIs.

AuthKit-LiteFree · Open source · Available now
  • JWT access and refresh tokens
  • Role-based authorization
  • Structured security layer
  • Postman collection included

AuthKit-Lite project structure

Spring Boot
Project structure
AuthKit-Lite
      • AuthKitApplication.java
      • DataInitializer.java
      • SecurityConfig.java
      • AuthController.java
      • UserController.java
      • ErrorResponse.java
      • JwtResponse.java
      • LoginRequest.java
      • RegisterRequest.java
      • UserProfileDto.java
      • UserSummaryDto.java
      • RefreshToken.java
      • Role.java
      • User.java
      • AccessDeniedBusinessException.java
      • EmailAlreadyExistsException.java
      • GlobalExceptionHandler.java
      • InvalidCredentialsException.java
      • RefreshTokenException.java
      • UsernameAlreadyExistsException.java
      • RefreshTokenRepository.java
      • RoleRepository.java
      • UserRepository.java
      • AuthService.java
      • JwtAuthenticationFilter.java
      • JwtUtils.java
      • RefreshTokenService.java
      • UserService.java
    • META-INF
    • static
    • templates
    • application.properties
  • src/test/java
  • src
  • target
  • Auth-Kit API Collection.postman_collection.json
  • CONTRIBUTING.md
  • license.md
  • pom.xml
  • README.md
  • SECURITY.md
Spring BootJava 21Maven
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Available boilerplates

Start with the capability you need

Choose a focused Spring Boot boilerplate instead of adopting a large starter kit with unrelated infrastructure.

$29 · Available now

FiloraFS-Pro

Production-ready Spring Boot file upload and storage with JWT security, S3 support, and local storage.

View Details
Free · Open source

AuthKit-Lite

A reusable Spring Security and JWT authentication foundation with refresh tokens and role-based access.

View Details
Free · Open source

FiloraFS-Lite

A free Spring Boot local file upload starter for learning, prototypes, internal tools, and simple self-hosted applications.

View Details
Free · Open source

Basely

A structured Java Discord bot starter with JDA, configurable prefix commands, event handling, and background jobs.

View Details
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Why BuildBaseKit

Stronger foundations, less repeated setup

Focused Spring Boot boilerplates built as production-ready, AI-ready, modular foundations.

01

Production Ready

Security, validation, testing, documentation, and maintainable architecture for real applications.

02

AI Ready

Explicit architecture and contribution guidance that helps developers and AI coding agents make safer changes.

03

Modular

Adopt only the capability you need for a smaller codebase, lower complexity, and faster onboarding.

Who BuildBaseKit is for and what you can build

Developers and technical teams

BuildBaseKit is for backend developers, indie builders, solo founders, and teams that want a consistent Spring Boot starting point instead of rebuilding authentication, file storage, and project structure.

APIs, SaaS backends, and internal tools

Use the foundations for secure APIs, backend services, file upload and storage systems, SaaS products, admin panels, and internal dashboards.

When the tradeoff makes sense

Start here when the capability is common infrastructure and your product value sits above it. Build from scratch when the infrastructure itself is the product or requires a fundamentally different architecture.

How BuildBaseKit works

From focused foundation to product code

  1. 01

    Choose a boilerplate

    Select the focused capability your application needs.

  2. 02

    Use it as your starting point

    Review the structure, documentation, and included project rules.

  3. 03

    Build your product

    Spend your time on product behavior instead of common backend setup.

Featured resources

Guide · AI and backend development

How to Make a Spring Boot Project AI-Ready

Learn how to make a Spring Boot project AI-ready with clear architecture, AGENTS.md, coding rules, project context, documentation, and safer AI-assisted development.

Benchmark · File storage

Spring Boot File Upload Performance Test: Real Load Test Results (7,500 RPM)

Real Spring Boot file upload performance benchmark using FiloraFS-Lite with latency, throughput, CPU, memory, and bottleneck analysis under 7,500 RPM load.

Blog · AI and backend development

AI Backend Development Without Rebuilding Everything

Learn an AI backend development workflow using Spring Boot boilerplates to reduce token usage and build product features without rebuilding setup code.

Explore all resources

Stop rebuilding backend infrastructure

Start from a stronger Spring Boot foundation.

Choose a focused boilerplate and spend your time building the product.

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Production-ready Spring Boot boilerplates and modular AI-ready foundations. Stop rebuilding backend infrastructure and ship applications faster.