Leanings of an event-sourced serverless application to broadcast real-time traffic alerts

RATPDev runs multiple transit networks worldwide. They are in need for a single solution to allow transit operators to easily broadcast alerts over multiple communication channels (Twitter, Facebook, email, SMS, Google Maps…).

I developed this application using Serverless framework, with TypeScript lambdas, on AWS. On an architectural point of view, events was the go-to solution:

Highly transactional application fits the bill of an Event Sourcing architecture, in which the events ledger is the application single source of truth.
Serverless infrastructure pushes an Event Driven architecture, where your lambdas’ stack is segmented and triggered via a global bus.
In this talk, I’ll share my personal experience during the development of this application.

What you will know after this talk

The challenges I faced when understanding serverless paradigms compared to a classic infrastructure
How to build an Event Sourcing architecture implementation with AWS using DynamoDB
How to leverage EventBridge service to decouple lambda’s execution stack
Tracing executions in an event driven infrastructure

I’ve already given this talk at ServerlessDays Paris 2020, ServerlessDays Belgium 2021 and DevBreak 2021.

You can check out the talk support and see me give this talk both in French and English.

Serverless Framework ❤️ AWS CDK - How Lift gets the best of both worlds

I created Lift, a plugin that leverages the AWS CDK to expand the Serverless Framework beyond functions and deploys websites, queues, webhooks and more with a few lines of declarative syntax. Let's explore its internals and learn how to expand any IaC functionalities with CDK programmatic API.

Les cabines d'entreprises connectées de WWI : une histoire d'amour entre IoT et serverless

Work with Island fabrique des cabines téléphoniques d'intérieur pour entreprise. Ils ont fait appel à Theodo pour développer en 3 mois un projet de bout en bout pour connecter leurs cabines.

Ce projet a pour objectif de permettre, via une intégration Slack, de connaître les disponibilités en temps réel des cabines, et d'obtenir des statistiques d'utilisation pour optimiser le placement et le nombre de ces cabines.

Pendant ce talk, je vous partagerai mon retour d'expérience sur le développement :

- **Du temps réel avec les AWS IoT Shadows** : Comment exposer en temps réel les caractéristiques d'un device. Comment se servir des channels d'update pour déclencher des actions asynchrones
- **Des analytics IoT sur mesure** : Pourquoi choisir DynamoDB et ses streams plutôt que Timestream ou AWS IoT Analytics pour stocker données historiques et analytics
- **D'intégrations functionless** : Comment intégrer en direct API Gateway avec les services DynamoDB et AWS IoT.

How I automated all my house with NodeJS and Homebridge

8am, heating turns on, coffee is brewing, lights slowly fade in and music wakes me up with a smile. This is just the beginning of my day in my fully automated flat where everything can be controlled by Siri.

What will you know at the end of the talk :
- How Homekit works and how to integrate a connected device within this protocol
- How to integrate your non-Homekit compatible devices in Homekit
- How to integrate your custom devices in Homekit
- How to setup powerful Scenes and Shortcuts to automate your connected devices

Serverless ❤️ IoT - Real time phone booth occupancy for Slack using AWS managed services

Work with Island manufactures indoor phone booths for business. They called on Theodo to develop a turn-key application project in 3 months to connect their cabins.

This project aimed at, using a Slack integration, broadcast real-time availabilities of the cabins, and to compute usage statistics in order to further optimize placement and quantity of these cabins.

What you will know after this talk

Real time with AWS IoT Shadows: How to expose the characteristics of a device in real time. How to use update channels to trigger asynchronous actions
Tailor-made IoT analytics: Why choose DynamoDB and its streams rather than Timestream or AWS IoT Analytics to store historical data and analytics
Functionless integrations: How to directly integrate API Gateway with DynamoDB and AWS IoT services.

I’ve already given this talk at AWS Community Day France 2021. You can check out the support I used and the video of the Community Day.

Enhancing an AWS Serverless app Operations: Cockpit Building with CDK and Lambda Powertools

Join us as we explore the intricacies of crafting a cutting-edge cockpit for an AWS serverless applications with a heavy reliance on external APIs. Delve into leveraging AWS Lambda Power Tools SDK and AWS CDK for seamless metric posting, tracing, and logging. Don't miss this opportunity to level up your AWS serverless expertise and drive transformative outcomes for your projects.

Going functionless - Stop writing unnecessary code

Less code is better. Serverless services have ways to enable you to remove more code than traditional architectures. The use of managed services reduces the amount of boiler plate code that does not directly adds value to your application while retaining the possibility to write full custom code where it’s needed most.

Serverless real value is not within well-known compute services, but rather in side-car managed services, handling task usually handled by non-ephemeral compute environment.

What you will know after this talk

When to rely properly on custom code, and when not to use compute services, depicted through the famous AWS serverless magic triptych: API Gateway - Lambda - DynamoDB
Added benefits from going functionless - Cost, Performance and Throttling
How to improve your developer experience while working in a functionless ecosystem

I never had the chance to give this talk yet, but would love the opportunity to give it a try!

This talk is based on the article I wrote, Serverless can benefit from not being so Lambda-centric.