Choosing Backend: Spring Boot, NestJS, .NET

Introduction: My Backend Journey

Every backend developer eventually faces the same question: which stack is best for my project?

With a background that spans both automation engineering and full-stack development, I've had the opportunity to work with various backend technologies. After spending considerable time in the Java ecosystem with Spring Boot, I became curious about other approaches to backend development. This curiosity led me to explore NestJS with Prisma in the JavaScript/TypeScript world and .NET Web API with Entity Framework Core in the C# realm.

What stood out was how each stack reflects its ecosystem’s philosophy: Spring Boot’s enterprise reliability, NestJS’s developer experience, and .NET’s deep integration with Microsoft tools. In this article, I'll share what I've learned about these three powerful approaches to building backend applications and interacting with databases.

Modern backend development is rich with frameworks, libraries, and tools that help engineers interact with databases, enforce best practices, and deliver production-ready applications:

Spring Boot + JPA + Flyway (Java ecosystem)
NestJS + Prisma (Node.js ecosystem)
.NET Web API + EF Core (C# ecosystem)

Each stack has its own philosophy, learning curve, and sweet spots. Whether you're a seasoned developer looking to expand your toolkit or a team lead evaluating technology choices for your next project, I hope my experience helps you navigate these options more confidently.

1. Spring Boot + JPA + Flyway (Java)

Overview

Spring Boot has been my go-to framework for years, especially for enterprise-grade applications. This battle-tested Java framework, when combined with JPA (Java Persistence API) for ORM and Flyway for database migrations, creates a robust foundation for applications that need to stand the test of time.

From my experience: Spring Boot shines when you're building systems that will evolve over many years with multiple teams contributing. The structure it enforces pays dividends as applications grow in complexity.

Features

JPA/Hibernate ORM: Abstracts SQL operations into Java objects
Flyway: Manages database schema evolution with version control
Spring Boot autoconfiguration: Dramatically reduces boilerplate code

Example: Basic User Entity

Here's how a simple user entity looks in the Spring Boot world:

@Entity
public class User {
    @Id
    @GeneratedValue
    private Long id;

    private String username;
    private String email;
}

The repository interface makes database operations straightforward:

public interface UserRepository extends JpaRepository<User, Long> {
    Optional<User> findByUsername(String username);
}

And database migrations with Flyway are just SQL scripts with version numbers:

-- V1__create_user_table.sql
CREATE TABLE users (
  id BIGSERIAL PRIMARY KEY,
  username VARCHAR(50) NOT NULL,
  email VARCHAR(100) NOT NULL
);

Use Cases

Enterprise banking, telecom, healthcare apps
Large teams with structured requirements
Complex domain-driven design implementations
Systems requiring long-term maintenance

Strengths

Rock-solid mature ecosystem with proven production reliability
Excellent tooling from Spring Data to Spring Security
Comprehensive documentation and massive community
Strong integration with virtually any relational database

Challenges I've Faced

The learning curve can be steep for newcomers to Java
JPA/Hibernate sometimes generates surprising SQL queries that require tuning
Configuration can get verbose for complex scenarios
The development feedback loop is slower than with some newer stacks

2. NestJS + Prisma (Node.js)

Overview

When I first tried NestJS after years in the Java world, I was pleasantly surprised by its familiar structure (inspired by Angular) combined with the speed of the Node.js ecosystem. Paired with Prisma as the ORM, it creates a delightful developer experience with strong TypeScript type safety.

From my experience: NestJS + Prisma delivers incredible developer productivity while maintaining good architectural practices. The real magic is in Prisma's schema-driven approach and type generation.

Features

Prisma schema: Acts as the single source of truth for your database schema and migrations
Type-safe queries: Eliminates most runtime SQL errors with compile-time checking
NestJS modules & decorators: Create a well-organized codebase with clear boundaries

Example: User Model

The Prisma schema is clean and intuitive:

model User {
  id        Int      @id @default(autoincrement())
  username  String   @unique
  email     String
  createdAt DateTime @default(now())
}

Services are concise and fully typed:

@Injectable()
export class UserService {
  constructor(private prisma: PrismaService) {}

  async findByUsername(username: string) {
    return this.prisma.user.findUnique({
      where: { username },
    });
  }
}

And migrations are as simple as:

npx prisma migrate dev --name init

Use Cases

Startups and fast prototypes
Real-time applications (chat, dashboards)
Teams with JavaScript/TypeScript expertise
Microservices and API-first applications

Strengths

Lightning-fast development experience
Excellent TypeScript integration with autocompletion for database queries
Great for teams transitioning from frontend to full-stack
Modern async/await patterns feel natural and clean

Challenges

Ecosystem, while growing rapidly, isn't as mature as Java's
Prisma has some limitations with complex queries and specialized database features
Production deployment requires more careful consideration (Node.js runtime behaviors)
Less battle-tested for extremely high-scale enterprise applications

3. .NET Web API + EF Core (C#)

Overview

Coming to .NET Web API after working with both Spring Boot and NestJS was an interesting experience. Microsoft's framework for building RESTful APIs, combined with Entity Framework Core as its ORM, feels like a middle ground - offering Java's robustness with some of TypeScript's developer experience benefits.

From my experience: .NET Core feels like it takes the best ideas from both worlds - Java's structure and TypeScript's expressiveness - while adding some uniquely powerful features like LINQ.

Features

EF Core migrations: Built-in database schema evolution with intuitive tooling
LINQ queries: Strongly-typed, composable query expressions that are a joy to write
ASP.NET Core DI & middleware: Flexible request pipeline configuration

Example: User Entity

The C# entity is concise and readable:

public class User {
    public int Id { get; set; }
    public string Username { get; set; } = string.Empty;
    public string Email { get; set; } = string.Empty;
}

The DbContext defines your database structure:

public class AppDbContext : DbContext {
    public DbSet<User> Users { get; set; }
}

Migrations are generated and applied through the CLI:

dotnet ef migrations add InitialCreate
dotnet ef database update

Controllers are clean and well-structured:

[ApiController]
[Route("api/[controller]")]
public class UserController : ControllerBase {
    private readonly AppDbContext _context;

    public UserController(AppDbContext context) {
        _context = context;
    }

    [HttpGet("{username}")]
    public async Task<ActionResult<User>> GetUser(string username) {
        var user = await _context.Users.FirstOrDefaultAsync(u => u.Username == username);
        return user ?? NotFound();
    }
}

Use Cases

Enterprise applications in Microsoft ecosystems
Organizations using Azure or Windows servers
Teams with C#/.NET expertise
Applications requiring integrated Visual Studio tooling

Strengths

First-class support from Microsoft with frequent updates
LINQ provides an intuitive and powerful way to query data
Excellent integration with Visual Studio's debugging and profiling tools
Strong performance characteristics with relatively low verbosity

Challenges

More resource-intensive than Node.js for equivalent workloads
Some EF Core features like lazy loading have quirks that require attention
The open-source community, while growing, is smaller than JavaScript's or Java's
Breaking changes between major versions can create migration headaches

Head-to-Head Comparison

After working with all three stacks on similar projects, here's my comparison of key aspects:

Feature	Spring Boot + JPA + Flyway	NestJS + Prisma	.NET Web API + EF Core
Language	Java	TypeScript/JavaScript	C#
ORM	Hibernate (JPA)	Prisma	EF Core
Migrations	Flyway	Prisma Migrate	EF Migrations
Query Style	JPQL / Criteria	Fluent TypeScript API	LINQ
Ecosystem	Mature, Enterprise-heavy	Modern, Startup-friendly	Enterprise + Microsoft-focused
Learning Curve	Steep	Moderate	Moderate
Performance	High but verbose ORM	Fast and lightweight	High, strong optimization
Best For	Enterprise-scale, DDD	Startups, agile teams	Enterprises on Microsoft stack

I've found that the learning curve for Spring Boot is the steepest, particularly for developers without prior Java experience. NestJS strikes a good balance of structure and approachability, while .NET benefits from C#'s relatively straightforward syntax combined with powerful language features.

When it comes to database interactions, all three provide abstractions, but with different philosophies:

JPA/Hibernate gives you the most control but requires more knowledge about how the ORM works under the hood
Prisma is the most opinionated and "batteries-included" approach, making common operations extremely simple
Entity Framework Core hits a nice balance with LINQ offering both simplicity and power

For team productivity, I've noticed that teams can typically deliver features faster with NestJS + Prisma initially, but as applications grow in complexity, the structure provided by Spring Boot becomes increasingly valuable. .NET teams, especially those already familiar with Microsoft technologies, often maintain consistent productivity throughout the project lifecycle.

Real-World Case Study: Building a User Management System

To make this comparison tangible, let's see how each stack would implement the same user management system. I'll walk through creating a system that supports:

User registration (username + email + password)
Fetching users by username
Updating user information
Deleting a user

This is a common requirement in many applications, and seeing the implementation differences will highlight the philosophy and approach of each stack.

1. Spring Boot + JPA + Flyway Implementation

Database Migration (Flyway)

-- V1__create_users_table.sql
CREATE TABLE users (
  id BIGSERIAL PRIMARY KEY,
  username VARCHAR(50) UNIQUE NOT NULL,
  email VARCHAR(100) UNIQUE NOT NULL,
  password VARCHAR(100) NOT NULL
);

Entity

@Entity
@Table(name = "users")
public class User {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;

    private String username;
    private String email;
    private String password;
}

Repository

public interface UserRepository extends JpaRepository<User, Long> {
    Optional<User> findByUsername(String username);
}

Service

@Service
public class UserService {
    @Autowired
    private UserRepository repo;

    public User register(User user) {
        return repo.save(user);
    }

    public Optional<User> findByUsername(String username) {
        return repo.findByUsername(username);
    }

    public void deleteUser(Long id) {
        repo.deleteById(id);
    }
}

Controller

@RestController
@RequestMapping("/users")
public class UserController {
    @Autowired
    private UserService service;

    @PostMapping
    public User register(@RequestBody User user) {
        return service.register(user);
    }

    @GetMapping("/{username}")
    public ResponseEntity<User> getUser(@PathVariable String username) {
        return service.findByUsername(username)
                .map(ResponseEntity::ok)
                .orElse(ResponseEntity.notFound().build());
    }

    @DeleteMapping("/{id}")
    public void deleteUser(@PathVariable Long id) {
        service.deleteUser(id);
    }
}

Spring Boot's implementation follows a clear layered architecture with distinct responsibilities for the Repository (data access), Service (business logic), and Controller (API endpoints). The approach is verbose but very structured, making it easy for new team members to understand the codebase.

2. NestJS + Prisma Implementation

Prisma Schema

model User {
  id       Int     @id @default(autoincrement())
  username String  @unique
  email    String  @unique
  password String
}

Run migration:

npx prisma migrate dev --name init

Service

@Injectable()
export class UserService {
  constructor(private prisma: PrismaService) {}

  async register(data: { username: string; email: string; password: string }) {
    return this.prisma.user.create({ data });
  }

  async findByUsername(username: string) {
    return this.prisma.user.findUnique({ where: { username } });
  }

  async deleteUser(id: number) {
    return this.prisma.user.delete({ where: { id } });
  }
}

Controller

@Controller('users')
export class UserController {
  constructor(private readonly userService: UserService) {}

  @Post()
  async register(@Body() data: any) {
    return this.userService.register(data);
  }

  @Get(':username')
  async getUser(@Param('username') username: string) {
    return this.userService.findByUsername(username);
  }

  @Delete(':id')
  async deleteUser(@Param('id') id: string) {
    return this.userService.deleteUser(Number(id));
  }
}

The NestJS implementation is more concise while still maintaining a clear structure inspired by Angular. The Prisma schema is particularly elegant, defining both the database structure and TypeScript types in a single file. The service methods are clean and to the point, leveraging TypeScript's async/await pattern.

3. .NET Web API + EF Core Implementation

Model

public class User {
    public int Id { get; set; }
    public string Username { get; set; } = string.Empty;
    public string Email { get; set; } = string.Empty;
    public string Password { get; set; } = string.Empty;
}

DbContext

public class AppDbContext : DbContext {
    public AppDbContext(DbContextOptions<AppDbContext> options) : base(options) { }
    public DbSet<User> Users { get; set; }
}

Migration

dotnet ef migrations add InitialCreate
dotnet ef database update

Controller

[ApiController]
[Route("api/[controller]")]
public class UsersController : ControllerBase {
    private readonly AppDbContext _context;

    public UsersController(AppDbContext context) {
        _context = context;
    }

    [HttpPost]
    public async Task<ActionResult<User>> Register(User user) {
        _context.Users.Add(user);
        await _context.SaveChangesAsync();
        return user;
    }

    [HttpGet("{username}")]
    public async Task<ActionResult<User>> GetUser(string username) {
        var user = await _context.Users.FirstOrDefaultAsync(u => u.Username == username);
        return user == null ? NotFound() : Ok(user);
    }

    [HttpDelete("{id}")]
    public async Task<IActionResult> DeleteUser(int id) {
        var user = await _context.Users.FindAsync(id);
        if (user == null) return NotFound();

        _context.Users.Remove(user);
        await _context.SaveChangesAsync();
        return NoContent();
    }
}

The .NET implementation strikes a balance between verbosity and expressiveness. The C# property syntax is concise, and the controller handles both data access and business logic in this simple example. In a more complex application, you would likely extract a service layer as well.

Side-by-Side Insights

Spring Boot + JPA + Flyway: More boilerplate, but great for structured, enterprise projects.
NestJS + Prisma: Concise, type-safe, developer-friendly. Perfect for startups.
.NET Web API + EF Core: Balanced verbosity and power, shines in Microsoft ecosystems.

My Experience Using These Tech Stacks

Working with these three stacks across different projects has given me valuable hands-on insights into their strengths and use cases.

With Spring Boot, We built a major financial services product using a microservices architecture. While the initial learning curve was steep, the investment paid off in a robust system that scaled well as transaction volumes grew. The explicit nature of the code meant fewer surprises during maintenance phases, and the mature ecosystem provided solutions for most challenges we encountered.

Using NestJS with Prisma, I developed a backend for a startup's mobile app. The development speed was remarkable - we went from concept to functional API in weeks rather than months. The TypeScript integration and Prisma's database tools were particularly impressive, allowing us to iterate quickly as the startup's requirements evolved.

For an internal device farm backend, We chose .NET Web API with Entity Framework Core. The seamless integration with other Microsoft tools in our environment made this choice practical. LINQ queries simplified complex data operations, and the strong C# type system helped prevent many common bugs before they reached production.

What became clear across these projects is that each stack has its sweet spot. The right choice depends on your specific requirements, team expertise, and organizational context.

Final Thoughts: What I've Learned About Stack Selection

Having worked with all three of these stacks across various projects, I've developed some perspective on choosing between them. While I don't claim to be an expert in all these technologies, I'd like to share what I've observed from both my application development and automation work.

My Decision-Making Framework

Here's a simple framework I use when deciding which stack might be most suitable for a project:

If You're Looking For...	I've Found This Works Well...	Based On My Experience...
Long-term maintainability	Spring Boot + JPA + Flyway	Worked well for enterprise projects where we needed stability
Fast development	NestJS + Prisma	Helped deliver POCs and MVPs quickly when time was tight
Microsoft ecosystem integration	.NET Web API + EF Core	Made sense when working with systems already using Azure and other MS tools
Existing team skills	Match stack with what people know	I've seen projects fail when forcing a "better" tech that nobody knows

Developer's Reflections: My Personal Journey with These Stacks

My journey with these technologies has been one of continuous learning and exploration. I want to share some honest reflections from my experiences with each stack.

Spring Boot: Learning Curve Adventures

My introduction to Spring Boot came after working with plain Java for several years. The difference was striking - where I had previously spent days configuring XML files and wrestling with application servers, Spring Boot let me focus on business logic.

Those first weeks involved a steep learning curve though! The complexity of dependency injection and the Spring ecosystem had me searching through documentation and Stack Overflow late into the night. I distinctly remember staring at a cryptic "bean not found" exception for hours before realizing I'd forgotten a simple annotation.

But eventually, things started to click. Building applications became more intuitive, and I grew to appreciate the structure that Spring Boot enforced.

NestJS + Prisma: A Pleasant Surprise

When I needed to create a dashboard for our test metrics, I decided to try NestJS with Prisma based on a colleague's recommendation. As someone who occasionally worked with Node.js for test scripting, I was curious but skeptical.

Setting up was surprisingly smooth. The TypeScript support was a game-changer for someone like me who values type safety when building test frameworks. The moment that stands out was watching Prisma generate models from our existing test database - it felt like magic compared to the manual ORM mapping I was used to.

The project that would have taken me months with Java was functional in weeks, giving me a new appreciation for what the right tools can do for productivity.

.NET: Breaking Out of My Comfort Zone

I avoided .NET for years, partly due to my background in open source tools. When a client project required it, I reluctantly agreed to build a test framework using .NET Web API and EF Core.

The Visual Studio experience was much better than I expected. LINQ queries made generating test data sets a breeze, and C# felt like a natural evolution from Java. The integration with Azure DevOps for our test pipeline was seamless.

A senior .NET developer on the team showed me patterns for mocking and testing I hadn't seen before, which I've since applied to other projects regardless of language.

What I've Taken Away

My journey with these stacks has taught me that being too dogmatic about technology choices limits growth. Each stack has introduced me to concepts and practices that have made me a better test automation engineer.

For others with a similar background looking to expand their skills:

Spring Boot taught me architectural discipline
NestJS showed me the value of developer experience
.NET reminded me not to dismiss technologies without trying them

I'm still learning and exploring all three of these stacks. Rather than becoming an expert in one, I've found value in understanding the different approaches each takes to solving similar problems. This perspective has been invaluable when designing test frameworks that need to work across different application architectures.

What about you? If you've worked with these stacks, especially from a testing or automation perspective, I'd love to hear about your experiences in the comments.

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More from this blog

Introduction: My Backend Journey

1. Spring Boot + JPA + Flyway (Java)

Overview

Features

Example: Basic User Entity

Use Cases

Strengths

Challenges I've Faced

2. NestJS + Prisma (Node.js)

Overview

Features

Example: User Model

Use Cases

Strengths

Challenges

3. .NET Web API + EF Core (C#)

Overview

Features

Example: User Entity

Use Cases

Strengths

Challenges

Head-to-Head Comparison

Real-World Case Study: Building a User Management System

1. Spring Boot + JPA + Flyway Implementation

Database Migration (Flyway)

Entity

Repository

Service

Controller

2. NestJS + Prisma Implementation

Prisma Schema

Service

Controller

3. .NET Web API + EF Core Implementation

Model

DbContext

Migration

Controller

Side-by-Side Insights

My Experience Using These Tech Stacks

Final Thoughts: What I've Learned About Stack Selection

My Decision-Making Framework

Developer's Reflections: My Personal Journey with These Stacks

Spring Boot: Learning Curve Adventures

NestJS + Prisma: A Pleasant Surprise

.NET: Breaking Out of My Comfort Zone

What I've Taken Away

Further Reading & Resources

Spring Boot / JPA / Flyway

NestJS / Prisma

.NET Web API / EF Core