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NestJS Development

WAYF is a NestJS Development Agency

WAYF is a NestJS Development Agency

NestJS is where we landed for server-side TypeScript. Not because it's trendy — because it's structured, opinionated, and plays well with teams who think in React patterns. Controllers, modules, dependency injection. Concepts that transfer. Code that reads the same on both sides of the stack.
WAYF builds backends in NestJS for projects where the frontend is React and the team wants one language, one mental model, and one set of conventions end to end.

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Start Your Project

Start Your Project

What We Build

APIs for React and React Native Applications.

The backend that powers the frontend we're already building — authentication, business logic, data persistence, third-party integrations. One team, one codebase philosophy where it makes sense.

APIs for React and React Native Applications.

The backend that powers the frontend we're already building — authentication, business logic, data persistence, third-party integrations. One team, one codebase philosophy where it makes sense.

Backend Systems for Products in Active Development.

Startups that need to move fast and don't want to hire a separate backend team yet. Scale-ups where the API is becoming a bottleneck and needs senior attention.

Backend Systems for Products in Active Development.

Startups that need to move fast and don't want to hire a separate backend team yet. Scale-ups where the API is becoming a bottleneck and needs senior attention.

Microservices and Service Extraction.

Monoliths that grew past their limits. Systems where pieces need to scale independently or deploy separately. NestJS modules map cleanly to service boundaries when the time comes to split.

Microservices and Service Extraction.

Monoliths that grew past their limits. Systems where pieces need to scale independently or deploy separately. NestJS modules map cleanly to service boundaries when the time comes
to split.

What We Build Less of:

backends disconnected from frontend work. If you need a Python data pipeline or a Go performance layer, we're not the right team. Our backend strength comes from full-stack context — understanding how the API serves the interface, not just how it serves requests.

What We Build Less of:

backends disconnected from frontend work. If you need a Python data pipeline or a Go performance layer, we're not the right team. Our backend strength comes from full-stack context — understanding how the API serves the interface, not just how it serves requests.

Why NestJS

It's not the only option. Express is simpler. Fastify is faster. Hapi exists. Raw Node exists.

But NestJS offers structure that scales with team size and project complexity. Decorators and modules that enforce organization. Dependency injection that makes testing straightforward. Patterns familiar to anyone who's worked in Angular or Spring — but in TypeScript, which means frontend developers aren't learning a new language to understand the backend.

For teams already working in React, the cognitive load drops. Same tooling. Same types. Same PR review workflow. The backend stops being a black box maintained by "the other team" and becomes part of the same system.

That's the tradeoff we're optimizing for: velocity and coherence over raw performance. If you need the fastest possible API, you probably need Go or Rust. If you need an API that your React team can understand, debug, and extend without context-switching — NestJS is a strong answer.

Patterns That Cause Pain

Express apps that outgrew Express. Started simple. Grew organically. Now there are 200 routes, no consistent structure, middleware layered on middleware, and new developers take a month to understand where anything lives. NestJS isn't magic, but its opinions prevent this kind of entropy.

Type theater. TypeScript on the backend, but types that lie. any scattered through the codebase. DTOs that don't match reality. Validation that happens sometimes. The type system is only useful if you actually use it — we're strict about this.

Authentication reinvented. Custom auth implementations with subtle bugs. JWT handling that's almost right. Session management that works until it doesn't. Passport integration exists for a reason; we use it.

Microservices too early. The system has three developers and twelve services. Deployment is a nightmare. Debugging crosses network boundaries for no reason. Sometimes a modular monolith is the right answer until it isn't. We'll tell you which you need.

Technical Approach

Modules as Boundaries

We structure NestJS applications around domain modules that could become services later if needed — but don't have to. Clear imports, explicit dependencies, no circular references. The architecture should be legible from the folder structure.

Validation at The Edge

DTOs with class-validator decorators. Payloads validated before they touch business logic. Errors returned with useful messages. The API should be defensive by default.

Validation at The Edge

DTOs with class-validator decorators. Payloads validated before they touch business logic. Errors returned with useful messages. The API should be defensive by default.

Database Access Through TypeORM or Prisma

TypeORM when we need fine-grained control or complex relations. Prisma when developer experience and type safety matter more than edge-case flexibility. Both work; we pick based on context.

Testing That Reflects Risk

Unit tests for business logic. Integration tests for API endpoints. E2e tests for critical paths. We don't test NestJS's dependency injection — we test the behavior that matters to your users.

Testing That Reflects Risk

Unit tests for business logic. Integration tests for API endpoints. E2e tests for critical paths. We don't test NestJS's dependency injection — we test the behavior that matters to your users.

Error Handling as a Feature

Consistent error responses. Proper HTTP status codes. Exceptions filtered and formatted. Logging that helps debug production issues, not logging that fills disks.

How We Work

Usually, NestJS is part of a larger engagement. You need a React application with an API behind it; we build both. Same team, same sprint, same accountability.

Sometimes, the backend needs dedicated focus. Performance problems. Security audit findings. A rewrite from a stack that isn't working. We do this too — but we're most effective when we understand the frontend the backend serves.

Either way: direct communication about tradeoffs. If Express would be simpler for your use case, we'll say so. If the project is complex enough to justify NestJS's structure, we'll explain why. We don't sell frameworks; we solve problems with appropriate tools.

Who We Work Well With

Clients building React products who want their backend to feel like part of the same system. Not a black box maintained by a different team with different conventions — an API their frontend developers can read, debug, and extend.

Also: clients with an existing Node backend that's become painful. Express apps that grew without structure. Codebases where new developers take weeks to find their footing. Systems that need architectural opinions imposed before they get worse.

What both types have in common: they value coherence over novelty, they want direct communication about tradeoffs, and they treat our team as partners building something together rather than vendors executing tickets.

Who We're Not For

If you're comparing agencies on hourly rate alone, we'll lose that spreadsheet every time. What we won't lose is three months to architectural rework, type system chaos, and the slow creep of an API that nobody fully understands.

If you need maximum backend performance — sub-millisecond response times, extreme throughput, the kind of optimization where language choice is the bottleneck — NestJS probably isn't the right tool, and we'll tell you that. TypeScript has limits; some applications push past them.

If you want a separate backend team working in a different language with different conventions, that's a valid choice — but it's not where our strength lies. We're best when the backend is part of a full-stack engagement, not isolated from the product it serves.

Compounding Trust

Founders, CTOs, and Procurement Officers choose WAYF.
Hundreds of 0 → 1 launches · Fortune 500 partnerships · Global public institution contracts

Founders, CTOs, and Procurement Officers choose WAYF. Hundreds of 0 → 1 launches · Fortune 500 partnerships · Global public institution contracts

Client spotlight

Client spotlight

Client spotlight

Client spotlight

Client spotlight

Client spotlight

Council of Europe Development Bank

Billions of Euros in capital deployed each year to support social cohesion.

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Council of Europe Development Bank

Billions of Euros in capital deployed each year to support social cohesion.

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Fortune 500:
Ingersoll Rand

Worldwide manufacturer and distributor of unrivalled compressed air solutions.

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Fortune 500: Ingersoll Rand

Worldwide manufacturer and distributor of unrivalled compressed air solutions.

View Case Study ->

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Let's talk

Let's talk

Building a React product and need a backend that your frontend team can own?

Have a Node API that needs structure, performance work, or a fresh start?

Building a React product and need a backend that your frontend team
can own?

Have a Node API that needs structure,
performance work, or a fresh start?

Fill Contact Form

Fill Contact Form

Fill Contact Form

Book Free Consult  •  25min

Book Free Consult  •  25min

Book Free Consult  •  25min