Arpad Muller
Senior Python Engineer at Zen Heads
Eger, Hungary
Summary
🤩
Rockstar🎓
Top SchoolArpad Muller is a Senior Python Engineer and Linux specialist with over a decade of professional software and systems experience and more than twenty years of hands-on Linux administration. He builds custom API-driven solutions, CI/CD packaging and automated deployment pipelines while also designing robust backup, monitoring and virtualization infrastructures (docker, lxc/lxd, ZFS). His background spans senior roles in telecom and enterprise environments and active open-source contributions, including implementing PostgreSQL's pg_lsn support in the diesel Rust ORM and enhancing Neon’s pageserver concurrency and metrics. Comfortable from low-level kernel/initramfs builds to high-level Python services, he combines pragmatic automation with deep systems knowledge to solve tricky integration problems. Based in Eger, Hungary, he seeks fully remote roles where he can deliver tailored, production-grade tooling and infrastructure optimizations.
9 years of coding experience
21 years of employment as a software developer
Engineering, Engineering at University of Miskolc
English, Hungarian
Github Skills (16)
rust10
api10
postgresql10
orm10
query-builder10
sql10
back-end-development10
apidoc10
datatypes10
concurrency9
testing9
metric9
database-design9
error-handling9
storage8
Programming languages (8)
Github contributions (5)
neondatabase/neon
Jul 2023 - Apr 2025
Neon: Serverless Postgres. We separated storage and compute to offer autoscaling, code-like database branching, and scale to zero.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:1687 reviews, 723 PRs, 1345 pushes in 1 year 9 months
Contributions summary:Arpad primarily focused on enhancing the pageserver's core functionality. Their contributions involved modifying metrics names, implementing a `Display` trait for layer files, and adding a new endpoint for querying time information. Furthermore, the user was responsible for addressing concurrency issues, including those related to timeline creation and deletion. They also improved code comments and fixed a bug in the storage broker.
neonrustserverlessautoscalingoffer
diesel-rs/diesel
Feb 2025 - Mar 2025
A safe, extensible ORM and Query Builder for Rust
Role in this project:Back-end Developer / Database Engineer
Back-end Developer / Database EngineerContributions:5 reviews, 1 PR, 8 comments in 10 days
Contributions summary:Arpad primarily contributed to implementing the `pg_lsn` data type within the diesel-rs/diesel repository, a Rust-based ORM. Their work included adding tests for `pg_lsn` functionality, including roundtrip tests and SQL equality checks, demonstrating a focus on data type correctness. The user also modified the schema inference tools and database type definitions to incorporate the new `pg_lsn` data type, enhancing the ORM's capabilities. Furthermore, they updated the codebase to handle PostgreSQL's `pg_lsn` format and corrected related error handling.
querymysqlrustsqlbuilder
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