Topo Lock Platform Tech Stack

Putting together a mapping platform is no small feat.

What does our tech stack look like?

Backend:

1. AWS Serverless active-active architecture
   • Deployed to Ohio (us-east-2) and Oregon (us-west-2)
   • Cloudfront, API Gateway, Lambda, DynamoDB Global Tables, S3
2. Infrastructure as Code: CDK
3. AWS multi-account secured with hardware keys (YubiKeys)
4. CI/CD: Github Actions

Maps:

1. Protomaps
2. Maplibre
3. Leaflet

Data Engineering:

1. DuckDB & DuckLake (As of May 2025)
2. AWS Step Functions & Lambda
3. GeoPandas
4. GDAL

Mobile:

Fully native iOS app written in SwiftUI with a few UIKit things here and there.

• SwiftUI
• Core Data
• Local First

End-to-End Encryption:

• libsodium

“Simplicity is the key to brilliance.” -Bruce Lee