# Accounting

URL: https://donedeploy.com/case-studies/accounting/

Case study · Accounting and finance

# A move to AWS the customers never noticed

An accounting company moved its platform to AWS, built from scratch as code, and switched public traffic over without its customers noticing.

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case · accounting

Built with!!!!!

✓

**Data gathering and design**We mapped what ran where and designed the target platform…

delivered

✓

**AWS infrastructure**A robust and scalable foundation built from scratch with ECS,…

delivered

✓

**CI/CD pipeline**A simplified, multi-stage pipeline on our own runners,…

delivered

*✓*

**Designed, built and run**by DoneDeploy engineers

What we delivered

## Step by step

1

### Data gathering and design

We mapped what ran where and designed the target platform before building anything.

2

### AWS infrastructure

A robust and scalable foundation built from scratch with ECS, RDS and Terraform.

3

### CI/CD pipeline

A simplified, multi-stage pipeline on our own runners, connected to both environments.

4

### Migration

Data mirrored between databases; after testing and validation, public traffic moved to AWS without customers noticing.

5

### Secure connectivity

Non-production environments and all production admin services behind a VPN.

Technologies

## What we used

[!AWS](https://donedeploy.com/technologies/aws/)[!Amazon ECS](https://donedeploy.com/technologies/amazon-ecs/)[!Terraform](https://donedeploy.com/technologies/terraform/)[!PostgreSQL](https://donedeploy.com/technologies/postgresql/)[!GitHub Actions](https://donedeploy.com/technologies/github-actions/)

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