Real-World Impact: Building Reliable Applications with Functions.do

In modern software development, the goal is simple: deliver value to users, fast. Yet, the path is often cluttered with complexity. Building, deploying, and maintaining backend services involves wrestling with infrastructure, managing configurations, writing boilerplate for APIs, and painstakingly guarding against runtime errors. What if you could strip all that away and focus purely on your application's core logic?

This is the promise of Functions.do. We believe in Reliable Function Execution, Simplified. Our platform empowers developers to build, deploy, and run typesafe functions as robust APIs, letting you focus on your code while we handle the complexities of scaling, security, and infrastructure.

The Hidden Cost of "Serverless" Complexity

Function-as-a-Service (FaaS) platforms like AWS Lambda and Google Cloud Functions revolutionized backend development by abstracting away servers. However, a significant amount of "DevOps" overhead remains. To create a production-ready API, you still need to:

• Configure an API Gateway to expose your function.
• Write validation logic to check incoming request bodies.
• Manually serialize and deserialize JSON.
• Implement error handling for type mismatches and missing data.
• Set up observability and logging to trace execution.

This friction slows down development and introduces potential points of failure. The reliability of your application depends on getting every one of these steps right, every single time.

Typesafe Functions Instantly: The Functions.do Difference

Functions.do takes a different approach by making type safety a first-class, built-in feature of the platform. Instead of being an afterthought, data integrity is the foundation.

We achieve this by having you define a clear contract for every function: an input schema and an output schema. Our platform enforces this contract automatically, guaranteeing that your function only runs with valid data and only returns results that match the expected shape.

Let's see it in action. Here’s how you can define a simple, yet completely robust, adder function:

import { Function } from 'functions.do';

// Define a typesafe function with input and output schemas
const adder = new Function({
  name: 'adder',
  input: { a: 'number', b: 'number' },
  output: { sum: 'number' },
  handler: async ({ a, b }) => {
    // Core logic is simple and focused
    return { sum: a + b };
  },
});

// Execute the function via the SDK
const result = await adder.run({ a: 5, b: 7 });

// result is guaranteed to be { sum: 12 }
console.log(result.sum);

Here’s what’s happening in this small block of code:

1. Strict Schema Definition: The input and output properties define the data contract. The platform will reject any call that doesn't provide two numbers and ensures the handler's return value is an object with a numeric sum.
2. Focused Logic: The handler contains only the core business logic. There's no validation boilerplate or JSON parsing—just a pure, simple function.
3. Guaranteed Results: When you execute adder.run(), the result is guaranteed to be typesafe. You can build your application with confidence, knowing that runtime type errors from this API are a thing of the past.

Powering Everything from APIs to Agentic Workflows

While the example is simple, this paradigm scales to handle highly complex tasks. Functions.do is the ideal backend for a wide range of use cases:

• Backend APIs: Quickly build RESTful endpoints for your web and mobile applications without the fuss of traditional frameworks.
• Data Processing Pipelines: Create a series of functions that pass structured data to one another, ensuring integrity at every step of the pipeline.
• Custom Automations: Trigger functions based on events from other systems to automate repetitive business processes.
• Agentic Workflows: Functions.do is uniquely suited for the emerging world of AI agents. By providing agents with a toolkit of strictly-defined, reliable functions, you can enable them to perform complex, multi-step tasks in the real world with predictable outcomes.

Why Choose Functions.do over Traditional FaaS?

Unlike platforms that provide the basic building blocks, Functions.do offers a fully integrated, higher-level experience designed for developer productivity and application reliability.

Our Goal: Minimize boilerplate and DevOps overhead, so you can turn business logic into production-ready services effortlessly.

Here’s how we stand apart:

Get Started with Reliable Function Execution

Stop wrestling with infrastructure and start building applications that are reliable by design. With Functions.do, you can transform your business logic into scalable, secure, and typesafe APIs in minutes, not days.

Ready to build with confidence? Visit Functions.do to learn more and deploy your first function today.