Kasperi Apell
SWE at ssh.com. Previously Applied Mathematics at University of Helsinki.
Interested in systems programming, high-performance systems, and programming close to the hardware.
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News
SWE at ssh.com. Previously Applied Mathematics at University of Helsinki.
Interested in systems programming, high-performance systems, and programming close to the hardware.
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News
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May 2025
After a few months of working on it on evenings, published Qstra, a persistent database serving Bloom filters, written in Rust.
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Jan 2024
Joined ssh.com as a software engineer, working on cybersecurity systems.
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Qstra: A persistent database serving Bloom filters, written in Rust.
Manage Bloom filter state in a persistent manner. Asynchronous command execution through network or local UNIX connections.
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ThmDex: A repository of mathematics notes.
These are all written by yours truly. Contains over 6000 definitions, over 5500 theorems, and over 3000 proofs, a minority of which are public. Some errors definitely exist.
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Naminum: A domain-name search engine.
Processes over 400k data points daily to determine domain name availabilities across the .com, .net, and .org TLDs.
- My recommendations for Japan travel
- My best productivity/QoL tweaks
- Why people are sleeping on the mathematics major
- Writing a Bloom filter database from scratch in Rust