Recap of the Online Scala Meetup: Reactive Ad Platform, Functional Programming, Scala 3 Typeclasses, and Spring‑Akka Microservices

The 2021 Online Scala Meetup, hosted by Tubi, showcased four technical sessions that explored advanced Scala usage in production systems.

A fully reactive ad serving platform using Scala & Akka‑Streams – Senior backend engineer Cheng Yingyu described how Tubi applies Akka‑Streams and Akka actors to build reusable graphs for a responsive advertising service, highlighting challenges and debugging techniques.

Secularized functional programming – ThoughtWorks consultant Yang Yun presented the pain points of adopting functional programming in everyday projects, proposing a trimmed‑down approach that retains core benefits while reducing learning overhead, and introduced a type‑flow methodology for large‑scale design.

Scala 3 Typeclasses – Clojure expert Liu Xin demonstrated hard‑core code examples illustrating Scala 3’s new syntax (given, extension, type lambda, and traits) that enables Haskell‑style typeclasses in regular applications, using a rewrite of the Jaskell combinator as a case study.

Spring + Akka microservice practice – Veteran Scala practitioner Yang Bajing shared a hands‑on session on integrating Spring and Akka services via gRPC, covering service registration, authentication, and practical tips for Akka‑gRPC usage.

The meetup concluded with a wish for a happy Spring Festival, links to video recordings and slide materials on the Scala Meetup GitHub repository, and a note that Tubi is actively hiring.