Pulumi with a TypeScript stack is the best starting point for application developers adopting infrastructure as code in 2026. It uses the programming language you already know, has excellent documentation, and produces infrastructure that is reproducible and version-controlled. Start with your most critical infrastructure component, not everything at once.
What Infrastructure as Code Actually Is
Infrastructure as code means defining your servers, databases, networks, load balancers, and other infrastructure in code files rather than clicking through cloud provider UIs. These files are version-controlled in git, can be reviewed in pull requests, and can be applied repeatedly to create identical infrastructure in different environments.
The core promise: if your production infrastructure was destroyed and you needed to rebuild it, you could run a single command and recreate it identically in minutes rather than spending hours clicking through AWS or Vercel consoles trying to remember every setting.
The secondary promise: creating a staging environment that matches production is a one-command operation rather than a weeks-long manual process where someone tries to recreate production settings from memory.
When IaC Is Worth the Investment
IaC earns its complexity cost when:
You have multiple environments (dev, staging, production). Managing three identical-but-separate environments manually means inconsistencies creep in. IaC makes environments identical by construction.
Your team needs to reproduce infrastructure. When a new developer joins, they can spin up their own isolated environment. When you move cloud providers, you have a definition of what you need.
Disaster recovery matters. If your database server fails, how long does it take to rebuild everything? With IaC: the time to run one command plus restore from backup. Without IaC: hours of clicking through the console hoping you remember every setting.
Infrastructure changes frequently. If you add a service every few weeks, having infrastructure in code means changes go through the same review process as application code.
When IaC Is Overkill
Single developer, simple deployment: If you are a solo developer with your application on Vercel or Railway, the deployment platform handles infrastructure for you. Adding Terraform on top adds complexity without meaningful benefit.
Configuration rarely changes: If you set up your infrastructure once and it stays the same for months, the investment in IaC tooling is not worth it. A documented runbook (screenshots + steps) achieves the same disaster recovery outcome for much less upfront work.
Very early stage: Spending a week on infrastructure tooling when you have not validated your product is the wrong allocation of engineering time.
Terraform: The Most Popular Choice
Terraform (by HashiCorp) is the most widely used IaC tool. It is provider-agnostic — the same tool manages AWS, GCP, Azure, Cloudflare, and hundreds of other providers via a plugin system. It uses HCL (HashiCorp Configuration Language), a declarative language designed specifically for infrastructure definitions.
resource "aws_instance" "web" {
ami = "ami-0c55b159cbfafe1f0"
instance_type = "t3.small"
tags = {
Name = "web-server"
Environment = "production"
}
}
resource "aws_db_instance" "postgres" {
engine = "postgres"
engine_version = "15.4"
instance_class = "db.t3.micro"
db_name = "myapp"
username = var.db_username
password = var.db_password
}
Terraform is mature, well-documented, and has a large community. The learning curve is HCL syntax plus understanding Terraform's plan/apply workflow (propose changes, review, apply). The downside: HCL is not a general-purpose programming language, so complex logic requires workarounds.
The Terraform state file is a critical piece of infrastructure. It tracks what Terraform has created so it can calculate the difference when you make changes. If the state file is lost or corrupted, Terraform loses track of what it manages. Store state remotely (Terraform Cloud, S3 + DynamoDB lock, or Pulumi Cloud) rather than locally.
Pulumi: IaC in TypeScript
Pulumi lets you define infrastructure using TypeScript (or Python, Go, C#). You write real code — functions, loops, conditionals — not a domain-specific language with limited constructs.
import * as aws from "@pulumi/aws";
import * as pulumi from "@pulumi/pulumi";
const config = new pulumi.Config();
const dbPassword = config.requireSecret("dbPassword");
const webServer = new aws.ec2.Instance("web-server", {
ami: "ami-0c55b159cbfafe1f0",
instanceType: "t3.small",
tags: {
Name: "web-server",
Environment: pulumi.getStack(),
},
});
const database = new aws.rds.Instance("postgres", {
engine: "postgres",
engineVersion: "15.4",
instanceClass: "db.t3.micro",
dbName: "myapp",
username: "admin",
password: dbPassword,
skipFinalSnapshot: true,
});
export const webServerIp = webServer.publicIp;
export const dbEndpoint = database.endpoint;
For application developers, Pulumi is the lower friction entry point. TypeScript types catch configuration errors before you run anything. The code patterns are familiar. You can import regular npm packages if you need to generate configuration dynamically.
Pulumi Cloud stores your state (free tier available). The CLI (pulumi up) shows a diff of what will change before applying, similar to Terraform.
AWS CDK: TypeScript for AWS Specifically
AWS CDK (Cloud Development Kit) is TypeScript IaC specifically for AWS. You write TypeScript that generates CloudFormation templates, which AWS then applies.
The advantage: very close integration with AWS, excellent TypeScript types, and access to high-level constructs (an aws_cdk.aws_ecs.FargateService encapsulates all the ECS, IAM, and networking configuration).
The disadvantage: AWS-only. If you ever need to add a Cloudflare resource or manage infrastructure across cloud providers, CDK does not help.
For teams committed to AWS long-term, CDK is a strong choice. For teams that might use multiple providers, Pulumi's provider-agnostic approach is more flexible.
A Practical Starting Point
Do not try to write IaC for your entire infrastructure on day one. Start with one critical component:
Your database: Define your RDS instance or MongoDB Atlas cluster in Pulumi. This is the highest-value starting point because databases are the hardest thing to recreate correctly by hand and the most critical to disaster recovery.
Once that is working and in git, add the next layer: your application servers or container definitions, then your networking configuration (VPC, security groups), then your DNS and load balancer configuration.
This incremental approach produces something useful in a week rather than spending three weeks writing IaC for everything and deploying nothing.
# Install Pulumi
brew install pulumi
# Create a new TypeScript project
mkdir my-infra && cd my-infra
pulumi new typescript
# Add AWS provider
npm install @pulumi/aws
# Deploy
pulumi up
The first pulumi up shows you what will be created, asks for confirmation, then creates it. The second pulumi up with no changes shows that everything is up to date. The third pulumi up after changing an instance type shows exactly what will change before applying.
Keep Reading
- CI/CD for Small Engineering Teams — deploying application code with the infrastructure IaC provisions
- GitHub Actions Guide for Developers — running
pulumi upautomatically in CI/CD - Load Testing Guide for Developers — testing the infrastructure you provision before it handles production traffic
Pristren builds AI-powered software for teams. Zlyqor is our all-in-one workspace — chat, projects, time tracking, AI meeting summaries, and invoicing — in one tool. Try it free.
