hauleth.dev
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hauleth.dev
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## Experience
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- Supabase - 2023-2025
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+ Logflare - logs aggregation service
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+ Supavisor - a cloud-native, multi-tenant Postgres connection pooler
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- Hauleth.dev - Consultant - 2021+
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+ DockYard/Karambit.ai - 2025
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* Architectural analysis of Karambit product
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* Prepared security analysis with detailed report with fixes
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+ Eiger - 2022-2023
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* Forte.io
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- Implementation of the Interledger protocol for cross-chain transactions
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- Implemented Interledger protocol for cross-chain transactions
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* Aleo Blockchain
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- Implementation of the GraphQL API for the on-chain data
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+ Erlang Solutions/Kloeckner GmbH - 2021 - Consultant for Elixir, Ruby, and SQL (PostgreSQL)
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* Substantial query performance optimisations by optimising PostgreSQL indices
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- Remote Inc. - Senior Backend Engineer - 2020-2021
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- Kobil GmbH - Erlang/Elixir Developer - 2019-2020
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+ Maintaining MongoDB driver for Elixir
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+ Implemented transactions for MongoDB driver in Elixir
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- Implemented GraphQL API for the on-chain data
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- Created syntax colouring library for Aleo assembly-like language
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for smart contracts
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+ Erlang Solutions/Kloeckner GmbH - 2021 - Consultant for Elixir, Ruby,
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and SQL (PostgreSQL)
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* Optimised DB query performance by providing PostgreSQL structure
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analysis and improving indices usage
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+ Remote Inc. - Senior Backend Engineer - 2020-2021
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* Architectural analysis of existing codebase
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+ Kobil GmbH - Erlang/Elixir Developer - 2019-2020
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* Maintained MongoDB driver for Elixir
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* Implemented transactions for MongoDB driver in Elixir
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- Supabase - 2023-2025
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+ Logflare - logs aggregation service:
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* Implemented on-the-fly decompression of incoming data that improved
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ingestion possibilities and reduced transfer usage (created library
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[`plug_caisson`][] for that purpose)
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* Implemented DataDog-compatible ingestion endpoint for seamless
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transition from DataDog provider to Logflare
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* Improved BigQuery pipeline workflow to reduce congestion on database
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connections
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* Added support for AWS Cloud Events metadata extraction
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* Improved CI usage by splitting different actions to separate steps ran
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in parallel
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* Replaced dynamic generation of connection modules for PostgreSQL
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storage system with Ecto's dynamic repositories to avoid atom exhaustion
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+ Supavisor - a cloud-native, multi-tenant Postgres connection pooler
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* Deployment management
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* Optimised metrics gathering system that resulted in an order of
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magnitude performance boost
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* Updated used OTP and Elixir versions from OTP 24 to OTP 27 and Elixir
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from 1.14 to 1.18
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* Reduced usage of mocking in tests to improve tests performance and
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volatility, resulting in reduced CI usage and improved developer
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experience
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* Implemented e2e tests against existing Node.js PostgreSQL clients to
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improve production issues
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* Implemented multi-region deployment system to provide blue/green
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deployments
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* Improved system observability features by making it more resilient and
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performant
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* Replaced usage of `ct_slave` with newer `peer` module in OTP
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- AppUnite - Full-stack Developer/DevOps - 2016-2019:
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+ JaFolders/AlleFolders
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* 2x performance improvement by optimising PostgreSQL usage
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* Reduced geo-queries using PostGIS thanks to better indices and
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materialised views usage
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* Implementation of the UI and brochure viewer in Vue and SVG
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materialised views usage
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* Implemented UI and brochure viewer in Vue and SVG
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+ OneMedical/Helium Health
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* Architectural redesign of application from Rails/MongoDB to
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Phoenix/PostgreSQL
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* Preparing hybrid deployment with on-premise/in-cloud system
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* Migration of the existing deployments from MongoDB to PostgreSQL
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Phoenix/PostgreSQL
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* Prepared hybrid deployment with on-premise/in-cloud system
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* Migrated of the existing deployments from MongoDB to PostgreSQL
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- Nukomeet - Full-stack Developer - 2015-2016
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- Prograils - Junior Developer - 2013
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···
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- Viking reenactor
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- Keyboard fan
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- Sci-fi/Fantasy fan and Poznań's Sci-fi/Fantasy club member
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[`plug_caisson`]: https://github.com/supabase/plug_caisson