Tim Visée
Software Engineer at Qdrant
The Hague, South Holland, Netherlands
Summary
🤩
RockstarTim Visée is a pragmatic software engineer with 13 years of experience building performant back-end systems and developer-facing tools, currently contributing to the core of Qdrant, a high-performance vector database, using Rust. He combines deep systems and database knowledge—evidenced by contributions to rust-rocksdb and backup fsync controls—with practical cryptography and security work in projects like ffsend. As a freelancer since 2007 he has delivered a wide variety of projects, spanning front-end polish and UX fixes to low-level performance optimizations. His open-source footprint shows a balance of maintenance, monitoring, and metricization (e.g., OpenTelemetry/Prometheus endpoints) alongside feature work. Based in The Hague, he brings a hands-on, production-minded approach to distributed systems and developer tooling. Colleagues would note his penchant for tackling both obscure performance bottlenecks and user-facing polish.
13 years of coding experience
English, Dutch
Stackoverflow
3,120reputation
532kreached
33answers
31questions
uri
top-5%
java
top-5%
Github Skills (45)
unit-testing10
search-engine10
javascript10
bukkit10
back-end-development10
spigot10
plugin-development10
rocksdb10
command-line-interface10
databases10
vector-database10
ui-design10
hkdf10
java10
javas10
Programming languages (29)
Github contributions (5)
timvisee/ffsend
Mar 2018 - Nov 2022
:mailbox_with_mail: Easily and securely share files from the command line. A fully featured Firefox Send client.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:83 releases, 5 reviews, 867 commits in 4 years 9 months
Contributions summary:Tim was primarily focused on implementing cryptographic features for a file-sharing application. Their work involved implementing core hashing logic with HKDF, creating file and meta ciphers, and building and encrypting metadata. The user also implemented logic for building and encrypting upload request data.
file-uploadfirefoxmailrustfile-sharing
qdrant/qdrant
Mar 2023 - Apr 2025
Qdrant - High-performance, massive-scale Vector Database and Vector Search Engine for the next generation of AI. Also available in the cloud https://cloud.qdrant.io/
Role in this project:Back-end Developer
Back-end DeveloperContributions:32 releases, 2780 reviews, 1448 PRs in 2 years 1 month
Contributions summary:Tim's commits primarily focused on improving the codebase of Qdrant, a vector database and search engine. Their work included fixing clippy warnings and implementing a `/metrics` endpoint for OpenTelemetry/Prometheus, suggesting involvement in code maintenance and monitoring. They also improved the performance of metric building and limited endpoint reporting, highlighting skills in performance optimization. The changes include a significant amount of code, with improvements made across several project modules.
pythonapproximate-nearest-neighbor-searchhnswsimilarity-searchvector
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.