Erwan Lemonnier – Medium

Erwan Lemonnier

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Erwan Lemonnier
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Gofrendly Engineering

Implementing the Gofrendly realtime chat

Gofrendly is a social app for women. Its central feature is a realtime chat, very similar to what you find in Facebook Messenger or…

11 min readNov 28, 2020

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Implementing the Gofrendly realtime chat

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Erwan Lemonnier

Erwan's toolbox

Once in a while I stumble on a new tool that I don't want to forget about, in case I'll need it in the future. Here is the list.

1 min readDec 19, 2022

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Erwan Lemonnier

From Emacs to VSCode on OSX

I have been using Emacs for over 20 years, but over the past years, it has become increasingly difficult to get my emacs environment…

1 min readSep 19, 2022

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Erwan Lemonnier
in
Gofrendly Engineering

Upgrading your dependencies: a backend developer's game of Russian roulette

If you are a seasoned developer, you have probably made it into a second nature to pin the versions of all your dependencies, and you make…

6 min readFeb 25, 2021

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Upgrading your dependencies: a backend developer's game of Russian roulette

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Erwan Lemonnier

Extracting email addresses from an actual paper list

So you got this amazing list of email addresses that your marketing team is literally drooling over, but you can't feed it into…

3 min readFeb 18, 2021

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Extracting email addresses from an actual paper list

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Erwan Lemonnier
in
Gofrendly Engineering

The speed of your backend's language does not matter

Python is my language of choice for backend programming. Python is slow. Python is not compiled. Python has dynamic typing, with all the…

2 min readDec 2, 2020

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The speed of your backend's language does not matter

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Erwan Lemonnier
in
Gofrendly Engineering

The Gofrendly magic trick, or how to rewrite a live backend without users noticing it

About Gofrendly and justifying a mad journey of technical debt cleansing

7 min readNov 25, 2020

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The Gofrendly magic trick, or how to rewrite a live backend without users noticing it

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Erwan Lemonnier

Killing your babies: tales from the startup world

At the core, I am a software developer. Have been since the age of 12 when I got a pocket calculator with a 30 characters display, a few…

4 min readNov 1, 2020

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Erwan Lemonnier
in
Gofrendly Engineering

Profiling database lookups in a REST api

About profiling endpoints in a python REST api and optimising the cost of database lookups to maintain user retention.

7 min readNov 1, 2020

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85% time spent calling Datastore

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Erwan Lemonnier

Erwan Lemonnier

CTO. Fullstack developer turned entrepreneur. Ex-employee of Spotify and Trustly. Author of the PyMacaron microservice framework.

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