Łukasz Niemier

(he/him)

Principal Elixir Developer

Poznan, Greater Poland, Poland🇵🇱

Open to:Full-time rolesContract rolesBoard positionsMentoring othersCollaborations

Preferred workplace:Remote (worldwide)Remote (same region)Remote (same country)

Principal-level Elixir/Erlang Engineer with 10+ years of experience building distributed cloud-native platforms and high-performance backend services. Contributor to Elixir, Erlang/OTP, and Ecto. Specializing in performance engineering, distributed systems, and fault-tolerant platforms.

Areas of expertise: Distributed Systems · BEAM/OTP · Performance Engineering · System Architecture ˙ Technical Mentoring

Activity

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Career: 9

Elixir Consultant

DockYard

Contract · Remote

Nov 2025 - Dec 2025

Architectural analysis of client product codebase with preparation of security analysis with detailed report with proposed solutions

ElixirPhoenix FrameworkSystems DesignInformation Architecture

Principal Elixir Developer

Supabase

Full-time · Remote

Nov 2023 - Jun 2025

- Lead development of Supabase's Supavisor project which was a backbone of the company offering - Improved performance of the implementation by 60% by careful analysis of application profile - Lead implementation of E2E testing against popular PostgreSQL JavaScript clients - Implemented multi-region deployment to improve system durability by blue/green deployments - Reduced usage of mocks in test suite to improve test performance as well as test volatility, reducing in reduced CI usage and improved development experience

ElixirErlangPostgreSQLEnglishCI/CDSystem DeploymentGitProject ManagementTechnical LeadershipTeam Collaboration

Senior Elixir Consultant

Logflare

Contract · Remote

Mar 2023 - Nov 2023

- Implemented on-the-fly decompression of incoming data that improved ingestion possibilities and reduced transfer usage - Implemented DataDog-compatible ingestion endpoint for seamless transition from DataDog provider to Logflare Improved BigQuery pipeline workflow to reduce congestion on database connections - Added support for AWS Cloud Events metadata extraction - Improved CI usage by splitting different actions to separate steps ran in parallel - Replaced dynamic generation of connection modules for PostgreSQL storage system with Ecto's dynamic repositories to avoid atom exhaustion

ElixirPhoenix FrameworkPostgreSQL

Senior Elixir Developer

Eiger

Remote

Aug 2022 - Feb 2023

- Forte.io - implemented Interledger protocol for cross-chain transactions - Aleo Blockchain - implemented GraphQL API for the on-chain data; created syntax colouring library for Aleo assembly-like language for smart contracts

ElixirPhoenix FrameworkRustBlockchainGit

Elixir Consultant

Erlang Solutions

Contract · Remote

Apr 2021 - Dec 2021

Optimised DB query performance by providing PostgreSQL structure analysis and improving indices usage

ElixirPhoenix FrameworkPostgreSQLAgile

Senior Elixir Developer

Remote.com

Full-time · Remote

Oct 2020 - Apr 2021

ElixirPhoenix Framework

Senior Erlang Developer

Kobil GmbH

Full-time · Remote

Mar 2019 - Sep 2020

Implementation of transactions in MongoDB driver for Elixir

ErlangElixirMongoDBGitRebar3

Full Stack Engineer

AppUnite

Self-employed · Hybrid

Nov 2016 - Mar 2019

- JaFolders/AlleFolders - 2× performance improvement by optimising PostgreSQL usage by reducing geo-queries using PostGIS thanks to better indices and materialised views; implemented UI and brochure viewer in Vue and SVG - OneMedical/Helium Health - architectural redesign and reimplementation of application from Rails/MongoDB to Phoenix/PostgreSQL; prepared hybrid deployment with on-premise/in-cloud system; migrated of the existing deployments from MongoDB to PostgreSQL

ElixirPhoenix FrameworkJavaScriptVue.jsPostgreSQLSystem DeploymentCI/CDGitTeam CollaborationLeadershipTechnical Leadership

Ruby Developer

Nukomeet

Full-time · On-site

Apr 2015 - Nov 2016

RubyRuby on RailsGit

Education: 1

Poznań University of Technology

No degree, Computer Science

Sep 2012 - Apr 2015

Activities / Societies: - Secretary of AKAI - Co-organiser of Google I/O Extended 2013 and 2014

Projects: 2

Implementation of Elixir Logger as a wrapper over Erlang logger

github.com/elixir-lang/elixir/pull/9333

Sep 2019 - Nov 2019

Reworked Elixir's Logger implementation to be built on top of new Erlang's Logger added in OTP 21. Added 3 new logging levels and support for structured logging.