Technologies / AWS
AWS app development for mobile backends you own
AWS app development covers the cloud side of a mobile product: sign-in, APIs, file storage, background jobs and push, built from Amazon Web Services and running in an account that belongs to you. AWS offers more building blocks than any team needs, so the real work is choosing a small, sensible set and setting them up so the bill and the security model stay understandable. Below: how we set up accounts, which services we use, and when AWS is more than you need.
AWS is one of the clouds in our cloud backend setup and hosting service, and is listed in our mobile app development technologies overview.
- Your AWS account, your billing
- Infrastructure defined as code
- Budget alerts before launch
- Least-privilege access we can lose
Client-owned AWS accounts: how we set things up
Every AWS project we run sits in an AWS account that you create and pay for. We never host a client’s production app in our own account, because that turns a contractor into a gatekeeper. If you change teams later, you remove our access; nothing has to be moved.
The setup we recommend
- Separate accounts per environment. Development, staging and production in different AWS accounts under AWS Organizations, so a mistake in testing cannot touch live data.
- Root user locked away. The root login has multi-factor authentication and is used only for billing and account recovery, by you.
- Named, role-based access for us. Our engineers sign in through IAM Identity Center or roles you grant, with permissions limited to what the project needs. Access is logged with CloudTrail and can be removed in minutes.
- Everything as code. Resources are defined in the repository with AWS CDK, Amplify’s TypeScript definitions or Terraform, so environments can be rebuilt and reviewed instead of clicked together in the console.
This follows the same ownership rules as the rest of our work: an NDA before discovery, code in your repository from day one, and store and cloud accounts in your name. Our NDA and IP protection page explains the contract side.
The AWS services we use most for mobile apps
A typical mobile backend on AWS uses only a handful of services.
AWS Amplify Gen 2
Amazon describes Amplify Gen 2, generally available since 6 May 2024, as a “fullstack TypeScript experience”: auth, data and storage are defined in TypeScript code in your repository. It is our fastest route to a working AWS backend for an MVP.
Amazon Cognito
Managed user sign-up and sign-in, with social and enterprise identity providers, multi-factor authentication and tokens your API can verify. Store login rules still apply; see our authentication and SSO page.
AWS Lambda and API Gateway
Serverless functions behind an HTTP API: no servers to patch, and capacity follows traffic. Good for webhooks, image processing, scheduled jobs and APIs with uneven load.
S3, DynamoDB or RDS
S3 for images and documents, served through CloudFront. DynamoDB for simple, high-volume key-value data; RDS for PostgreSQL when the data is relational and needs reporting.
When AWS app development is the right call, and when it is not
AWS makes sense when the app will grow into more than a simple backend: heavy media processing, data pipelines, many integrations, strict network controls or a security team that has already approved AWS. It also suits companies that already run other systems on AWS and want the app inside the same governance. For US healthcare clients, HHS guidance says a cloud provider storing ePHI is a business associate and a BAA is required; the BAA is between you and AWS, and our HIPAA-compliant app development guide covers the rest.
AWS is often more than an early MVP needs. A managed backend such as Firebase or Supabase usually reaches first users with less setup, fewer services to understand and simpler billing. If your company runs on Microsoft or Google already, Microsoft Azure or Google Cloud may fit your existing identity and contracts better.
AWS fits when
- The backend will grow beyond auth, data and storage
- Your company already runs workloads on AWS
- Security or compliance teams have approved AWS
- You need fine control over networks and regions
- Media, data or integration workloads are heavy
Not sure AWS is worth the setup for your app?
Send us your feature list and growth plans. Within one business day you get our recommendation: AWS, a managed backend or a mix, with the reasons in plain English.
Cost behaviour on AWS, explained without price lists
We do not quote AWS prices here. They change, vary by region and depend on the exact mix of services. What we can explain is how AWS bills behave, because most surprises come from design rather than traffic.
- Pay-per-use services follow app design. Lambda, API Gateway and DynamoDB bill on requests and usage, so a screen that makes ten calls where one would do costs ten times as much.
- Always-on resources cost money while idle. Database instances, NAT gateways and load balancers bill whether or not anyone uses the app, which matters for staging environments left running.
- Data transfer is easy to overlook. Serving full-size images to phones, or moving data between regions, adds up. Resizing on upload and caching through CloudFront are usually the first fixes.
- Logs grow quietly. Verbose logging with no retention policy keeps adding storage cost every month.
Before launch we set AWS Budgets alerts, tag every resource by environment and feature, and review Cost Explorer with you in the first months. Our hidden costs of app development article covers cloud bills alongside other running costs.
AWS compared with other mobile backends
How AWS app development compares with the other backend routes we build.
| AWS (Amplify, Cognito, Lambda) | Firebase | Supabase | Azure / Google Cloud | |
|---|---|---|---|---|
| Setup effort | Moderate with Amplify; higher with custom services | Low | Low | Moderate |
| Breadth of services | Widest | Focused on app needs | Focused on Postgres | Wide |
| Data model | Your choice: DynamoDB, Postgres and more | NoSQL documents | Postgres | Your choice |
| Cost visibility | Needs tagging and budgets | Per read and write | Plan and resource based | Needs tagging and budgets |
| Best for | Growing products, heavy workloads, AWS shops | Fast MVPs, realtime, offline | Relational MVPs, low lock-in | Microsoft or Google-centred companies |
How AWS fits your stack and team
AWS works with every mobile stack we build in. Amplify’s client libraries cover native, Flutter and React Native apps, and a plain REST API on API Gateway works with anything. For apps that need a conventional server, we run Node.js, Laravel, Django or .NET in containers on ECS or App Runner instead of Lambda.
The team impact is real. AWS rewards people who understand IAM, networking and cost, and a backend assembled by someone who does not can be both insecure and expensive. When you hire backend developers for AWS work, ask about permission design and cost control, not just service names. For architecture decisions before any build, see our technical architecture consulting.
Code-quality practices on our AWS projects
What you can check in your AWS accounts and repository.
- All infrastructure in code (CDK, Amplify Gen 2 or Terraform), reviewed in pull requests
- Separate AWS accounts for development, staging and production
- IAM roles with least privilege; no long-lived access keys in apps or CI
- Secrets in AWS Secrets Manager or Parameter Store, never in the mobile app
- CloudTrail enabled and log retention set on every log group
- AWS Budgets alerts and cost-allocation tags before launch
- Backups for databases and S3 versioning on important buckets, with a tested restore
AWS app development: frequently asked questions
Is AWS a good backend for a mobile app?
Yes, especially for apps that will grow into heavy media, data or integration work, or for companies already on AWS. Amplify Gen 2, Cognito, Lambda and S3 cover most mobile backend needs. For a simple early MVP, a managed backend such as Firebase or Supabase is often quicker to launch and easier to understand.
What is AWS Amplify Gen 2?
Amplify Gen 2 is AWS’s toolkit for building app backends, generally available since 6 May 2024. Amazon describes it as a fullstack TypeScript experience: authentication, data and storage are defined in TypeScript code in your repository and deployed to AWS. It gives a faster start than wiring individual services together by hand.
Should we use Cognito for sign-in?
Cognito is a sensible default if the backend is on AWS. It handles sign-up, sign-in, multi-factor authentication and social or enterprise identity providers, and issues tokens your API can verify. Store rules still apply, for example Apple’s requirement for an equivalent privacy-focused login option when you offer third-party social login as the main account.
How much will AWS cost for our app?
It depends on design as much as traffic, so we do not quote a number without your feature list. Pay-per-use services follow how often the app calls them, while databases and network gateways cost money even when idle. We estimate usage per active user, set budget alerts before launch and review costs with you in the first months.
Who owns the AWS account?
You do. The account is created in your name with your billing, and our engineers work through roles you grant and can remove. Infrastructure is defined as code in your repository, so another team can rebuild or take it over. An NDA is signed before discovery, and nothing needs migrating if you change suppliers.
AWS, Azure or Google Cloud?
All three can run a mobile backend well. Choose the one that fits what your company already uses: Azure for Microsoft identity and SQL Server, Google Cloud if you are on Firebase or Google Workspace, AWS if you already run workloads there or need its breadth. For a new company with no cloud yet, we compare them against your features in discovery.
Build on AWS without losing control of the bill
Book a 30-minute scoping call. We will look at your app and tell you which AWS services you need, which you can skip and how we would set up access, costs and environments in your account.