Lassi Pölönen
Member Of Technical Staff at Databricks
Espoo, Finland
Summary
🤩
Rockstar🎓
Top SchoolLassi Pölönen is a pragmatic SRE/DevOps engineer and backend developer with 11 years of hands-on experience building and operating large-scale *nix and cloud infrastructures. Currently a Member of Technical Staff at Databricks after helping build Neon’s serverless Postgres DBaaS, he blends production reliability, automation and platform architecture to unblock fast feature delivery. His background spans bare-metal datacenters to Kubernetes, PostgreSQL internals, observability stacks and infrastructure-as-code, and he’s contributed backend fixes to prominent open-source projects like HashiCorp Vault and Neon. Lassi favors understanding the “why” behind design trade-offs and brings a systems-level view to resource management, performance and operational consistency. He’s comfortable in Rust and Go as well as traditional ops tooling, and has a track record of improving metric hygiene and cleanup logic that quietly prevents production headaches.
11 years of coding experience
20 years of employment as a software developer
Olarin lukioComputer Science, Computer Science at University of Helsinki
Github Skills (17)
postgresql10
back-end-development10
databases10
go10
prometheus10
performance-optimization10
vault10
rust10
backend10
database10
secrets9
refactor9
serverless9
refactoring9
database-management9
Programming languages (12)
Github contributions (5)
neondatabase/neon
Sep 2022 - Jan 2023
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 & Database Engineer
Back-end Developer & Database EngineerContributions:81 reviews, 13 commits, 29 PRs in 4 months
Contributions summary:Lassi focused on optimizing and refactoring the pageserver's metrics collection and storage operations within the Neon database. They addressed metric cleanup related to tenant detachment, re-organized metric definitions, and renamed metrics for clarity. The user also implemented a global histogram for storage operations, improving performance. Additionally, they improved logging by adding JSON logging capability and implemented build info metrics.
neonrustserverlessautoscalingoffer
hashicorp/vault
Sep 2015 - Sep 2015
A tool for secrets management, encryption as a service, and privileged access management
Role in this project:Back-end Developer
Back-end DeveloperContributions:5 commits, 2 PRs, 16 comments in 4 days
Contributions summary:Lassi primarily focused on implementing backend functionality related to cleanup routines and database connection management within the Vault project. Their contributions involved adding a `Clean` method to the `Backend` interface, ensuring connections are closed on unmount, and ensuring timezone is set correctly. They modified several files related to backend, mount, and router functionality, reflecting changes to the core logic of the system. These changes aimed to improve resource management and ensure data consistency within the Vault's backend system.
golanghashicorp-vaultaccess-managementsecurityvault
Find and Hire Top DevelopersWe’ve analyzed the programming source code of over 60 million software developers on GitHub and scored them by 50,000 skills. Sign-up on Prog,AI to search for software developers.