José Valim
Chief Adoption Officer at Dashbit
Krakow, Lesser Poland Voivodeship
Summary
🤩
Rockstar🎓
Top School
Top expert inElixir and Erlang Web Development
José Valim is the creator of the Elixir programming language and Chief Adoption Officer at Dashbit, bringing 18 years of experience building scalable, concurrent systems for web and embedded markets. He combines hands-on engineering—contributing across core projects like Elixir, Phoenix, Ecto, LiveView, and Erlang/OTP—with developer advocacy, conference speaking, and three technical books to grow ecosystems and drive adoption. Previously a Rails Core Team member, his background in Ruby and deep runtime-level work informs pragmatic language and tooling design that emphasizes fault tolerance and developer productivity. At Dashbit he helps ship products such as Livebook and Tidewave while guiding open-source projects like Broadway, Flow, and Mox. Trained in engineering at USP and Politecnico di Torino, he pairs academic rigor with a proven track record of evolving language runtimes and developer workflows used globally.
18 years of coding experience
12 years of employment as a software developer
Graduate Electrical Engineering, Graduate Electrical Engineering at USP - Universidade de São PauloMaster of Science Engineering, Master of Science Engineering at Politecnico di Torino
English, Italian, Portuguese, Polish
Stackoverflow
50,829reputation
1.0mreached
349answers
0questions
enumeration
top-5%
recursion
top-5%
docker
top-5%
architecture
top-1%
testing
top-5%
postgresql
top-5%
Github Skills (179)
dependency-management10
url-routing10
benchmark10
dashboard10
postgresql10
website-development10
package-management10
optimizers10
testing10
rspec10
http10
authentication10
websocket10
genstage10
webpages10
Programming languages (24)
Github contributions (5)
dashbitco/mox
Sep 2017 - May 2022
Mocks and explicit contracts in Elixir
Role in this project:
Backend Developer
Backend DeveloperContributions:26 reviews, 60 commits, 67 PRs in 4 years 8 months
Contributions summary:José primarily contributed to the documentation and testing infrastructure of the Mox library. They improved the documentation by adding examples and clarifying the library's behavior and usage, including multi-process collaboration and compile-time requirements. The user also refactored the test suite and improved error messages. Additionally, they made improvements to the Mox server and its internal workings, including adding features like `verify_on_exit!`.
testingelixirmockscontractsexplicit-contracts
elixir-ecto/postgrex
Dec 2013 - Sep 2022
PostgreSQL driver for Elixir
Role in this project:Back-end Developer
Back-end DeveloperContributions:151 reviews, 266 commits, 182 PRs in 8 years 10 months
Contributions summary:José contributed to the PostgreSQL driver for Elixir by implementing features, fixing bugs, and improving testing. Their work included allowing newer versions of Postgrex, removing direct transaction support, and improving output for setting up tests. The user also addressed potential server crashes related to client timeouts and optimized binary building.
postgresqlelixirpostgrespostgresql-driver
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