Łukasz Niemier
Consultant at Hauleth.dev
Greater Poland Voivodeship
Summary
🤩
Rockstar🎓
Top SchoolŁukasz Niemier is a seasoned backend and DevOps consultant with 15 years of experience building and hardening distributed systems, currently operating from Greater Poland. He brings deep expertise in Elixir, Erlang and Rust, contributing to high-profile open-source projects like Elixir core, Ecto, Devise and Erlang/OTP where he improved language tooling, authentication flows and socket subsystems. His work spans backend engineering, performance optimization (SIMD in image-rs), database/query tuning and Nix-based macOS system configuration, showing a rare combination of low-level systems thinking and developer ergonomics. At companies including Supabase, Erlang Solutions and multiple consultancy roles he has delivered production-ready features, tests and CI improvements while mentoring teams on maintainability. Notably, he has enhanced translation tooling, MongoDB driver transactions, and introduced Dialyxir support for Sentry’s Elixir SDK—evidence of pragmatic contributions that improve both correctness and developer experience. Colleagues describe him as a meticulous problem-solver who prefers durable, well-tested solutions over quick hacks.
15 years of coding experience
8 years of employment as a software developer
Student, Computer Science, Student, Computer Science at Poznan University of Technology
Polish, English
Stackoverflow
23,143reputation
1.9mreached
473answers
34questions
twig
top-5%
git
top-5%
ruby
top-1%
syntax-highlighting
top-1%
ruby-on-rails
top-5%
sass
top-5%
Github Skills (91)
transaction10
nix10
image-processing10
vimscript10
testing10
authentication10
complex-numbers10
ruby10
vim10
launchd10
socket10
sdk10
rust10
ecto10
erlang10
Programming languages (34)
Github contributions (5)
elixir-mongo/mongodb
Jul 2019 - Oct 2020
MongoDB driver for Elixir
Role in this project:
Backend Developer
Backend DeveloperContributions:8 reviews, 69 commits, 13 PRs in 1 year 2 months
Contributions summary:Łukasz contributed to the Elixir MongoDB driver, focusing on core functionality. They implemented features such as shutting down MongoDB instances, refactoring test code, and integrating support for MongoDB sessions and transactions. Additional work included adopting modern Elixir practices like `@impl` and enhancing BSON encoding for integer types.
mongodb-driverdriverelixirmongodb
elixir-editors/vim-elixir
Oct 2016 - May 2021
Vim configuration files for Elixir
Role in this project:Backend Developer
Backend DeveloperContributions:11 commits, 12 PRs, 30 comments in 4 years 7 months
Contributions summary:Łukasz primarily contributed to enhancing the Vim configuration files for Elixir. Their work included adding support for `vim-surround` and implementing features related to number syntax highlighting and defining Elixir code blocks. Furthermore, they integrated `vim-dadbod` for database interaction with Ecto and implemented support for new compilers and stacktrace visualization. These contributions suggest a focus on improving the Elixir development experience within Vim.
configuration-fileselixirvimvim-configuration
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