La Fosse is proud to co-organise the JavaScript London Meetup, hosted by Richard Moss and Sam Barcia. Bringing together a community of people passionate about JavaScript, we believe that the best way to learn is by doing – and it’s also the most rewarding.

Richard originally engaged with Sam and La Fosse during his latest role. Both Sam and Richard shared their keen interest in building the best community for JavaScript professionals, so together they committed to host more frequent and varied events, bringing together both their connections and experiences.


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JavaScript London in collaboration with Cleo

Tuesday, 16th April, 2024 at 6pm

This meet-up will be in person, kindly sponsored by Cleo and including pizza 🍕, beer 🍻, and maybe a bit of ping pong.


“Push it real good: How Codepush can be used to speed up PR testing on React Native apps” – Felix Harrison

“Leveraging LLMs and AST for efficient JavaScript to TypeScript migration” – Mykola Boiko

Full agenda:
  • 6:00pm: Doors open. Grab a pizza slice, sip a beer, and start chatting with other attendees.
  • 6:30pm: Welcome remarks by Sam and Richard. We’ll set the stage for an enriching night of learning and fun.
  • 6:35 – 7:05pm: First talk by Felix Harrison on “Push it real good: How Codepush can be used to speed up PR testing on React Native apps”.
  • 7:05pm: Toilet break and networking time. Use this chance to discuss the talk or connect with other members!
  • 7:20 – 7:50pm: Second talk by Mykola Boiko on “Leveraging LLMs and AST for efficient JavaScript to TypeScript migration”.
  • 7:50pm: Closing remarks and an optional pub visit.
Directions to Cleo:

The easiest way to enter the Tea Building is at the entrance opposite Blank Street Coffee. Cleo’s office is Unit 2.10 on the second floor. There are lifts and stairs from reception.

Sponsor: Cleo

Cleo is an AI assistant that turns the complexity of financial life into a conversation, the same kind you’d have with a friend. She offers users budgeting and savings hacks to help them break bad financial habits and form a healthier relationship with their finances.

Cleo is HQ’d in London and, over the past year, the team has grown to 250 people. In 2023, Cleo closed an $80m Series C funding round, led by Sofina, with a $500M valuation.

Previous events:

September 2023

Useful TypeScript Patterns You Might Not Know About – Apurva Deshpande

In this talk, we will explore some techniques to get the most out of the TypeScript compiler (including type predicates and discriminated unions) with examples. We will also take a look at decorators, new in TypeScript 5.0, and how they can make your developer life easier.

Serverless framework: fully managed micro-services on cloud without the stress of a server – Nicola Cogotti

In this talk we will explore how to use Serverless Framework to create complex infrastructures deployed on public clouds (AWS in particular but all major clouds are supported), to meet the highest quality standards in the most cost effective way using Typescript.