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@pennylane-hq

Pennylane

All-in-one financial OS

Welcome to Pennylane 👋

We're a fintech startup building the financial OS for SMEs and startups.

We allow business owners to make better decisions and accountants to focus on advising their clients.

Today, we serve over 1 million SMEs in France and over 6000 accounting firms that provide them bookkeeping services.

From a more technical standpoint, we have:

  • 250k weekly active SME users
  • 45k weekly active accountants

During a typical workday, we handle:

  • about 10k HTTP requests / second
  • about 1k background jobs / second
  • about 130k queries / second to our Postgresql cluster

Here's what out tech environment looks like:

  • ~350 developers working fully remotely from Europe and the Middle-east
  • ~200 commits every day through Pull Requests
  • 30 deployments a day, fully automated through CI / CD
  • a monolith Rails / React (TypeScript) main application, and 36 other repos for tooling / data pipelines
  • test coverage : ~95% of the Rails back-end, ~90% of the Typesript front-end

You can read more about our Engineering Culture on Medium

Things we love ❤️:

  • taking care of our Postgres DB: hunting down the N+1, looking into index performance, writing complex but efficient scopes for business-logic
  • linters and automated tools: we add checks for our internal coding standards with eslint and rubocop extensions to ensure code quality

We're hiring for lots of Tech & Product roles, you can find the openings on our website

Popular repositories Loading

  1. activerecord-adapter-redshift activerecord-adapter-redshift Public

    Forked from flexport/activerecord6-redshift-adapter

    Ruby 8 30

  2. cfonb cfonb Public

    An easy to use CFONB format parser

    Ruby 6 3

  3. active_record-returning_attributes active_record-returning_attributes Public

    Forked from tbuehlmann/active_record-returning_attributes

    Ruby 4

  4. activerecord_batch_update activerecord_batch_update Public

    Update many records with different sets of changes, efficiently

    Ruby 3

  5. jean_test_rails jean_test_rails Public

    Scaffold for live coding interview on Ruby on Rails

    Ruby 1

  6. .github .github Public

    1

Repositories

Showing 10 of 26 repositories
  • clickhouse-activerecord Public Forked from PNixx/clickhouse-activerecord

    A Ruby database ActiveRecord driver for ClickHouse

    pennylane-hq/clickhouse-activerecord's past year of commit activity
    Ruby 0 MIT 139 0 1 Updated Oct 1, 2026
  • pre-commit-hooks Public

    Homemade pre-commit hooks

    pennylane-hq/pre-commit-hooks's past year of commit activity
    Shell 0 MIT 0 0 1 Updated Sep 23, 2026
  • cfonb Public

    An easy to use CFONB format parser

    pennylane-hq/cfonb's past year of commit activity
    Ruby 6 MIT 3 0 1 Updated Sep 18, 2026
  • homebrew-tap Public Forked from ruimarinho/homebrew-tap

    🍻 Homebrew tap for some of my open source projects

    pennylane-hq/homebrew-tap's past year of commit activity
    Ruby 0 5 0 0 Updated Sep 15, 2026
  • akami Public Forked from savonrb/akami

    Building Web Service Security

    pennylane-hq/akami's past year of commit activity
    Ruby 0 MIT 66 0 1 Updated Sep 8, 2026
  • cancancan Public Forked from CanCanCommunity/cancancan

    The authorization Gem for Ruby on Rails.

    pennylane-hq/cancancan's past year of commit activity
    Ruby 0 MIT 641 0 1 Updated Sep 3, 2026
  • liberic-ruby Public Forked from mpm/liberic-ruby

    Ruby bindings for ERiC (An official C library for exchanging data with the German Tax Authority's ELSTER service)

    pennylane-hq/liberic-ruby's past year of commit activity
    Ruby 0 MIT 3 0 1 Updated Sep 2, 2026
  • ofx Public Forked from annacruz/ofx

    A simple OFX (Open Financial Exchange) parser built on top of Nokogiri. Currently supports OFX 1.0.2.

    pennylane-hq/ofx's past year of commit activity
    Ruby 0 96 0 5 Updated Aug 10, 2026
  • HandyClient Public archive Forked from cjpais/Handy

    Speech-to-text application that works completely offline.

    pennylane-hq/HandyClient's past year of commit activity
    Rust 0 MIT 3,145 0 1 Updated Jul 15, 2026
  • activerecord_batch_update Public

    Update many records with different sets of changes, efficiently

    pennylane-hq/activerecord_batch_update's past year of commit activity
    Ruby 3 MIT 0 0 0 Updated May 22, 2026

Sponsoring

  • @mpm
  • @djezzzl
  • @tannerlinsley
  • @koic
  • @bbatsov
  • @biomejs
  • @fxn
  • @prettier
  • @asottile
  • @antonbabenko

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