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Valentyn Kit

Systems engineer. I understand things by rebuilding them from scratch: TCP stacks, storage engines, OS primitives. Rust and C. Currently inside the Solana protocol.

Poland, Warsaw Joined on May 3, 2024 valentynkit.work@pm.me https://valentynkit.com/

Pronouns

He/Him

Work

Lead Backend & Platform Engineer

Badges

1 Week Community Wellness Streak

Writing Debut

Two Year Club

One Year Club

GitHub Repositories

mapreduce-c

Custom implementation of MapReduce in C.

C • 1 star

building-tcp-servers-in-c

A TCP server built five ways in C — blocking → nonblocking → select → kqueue → a framed protocol with backpressure. libc-only.

C • 1 star

building-tcp-servers-in-rust

One TCP echo server, built seven times, from a blocking socket to an async runtime. blocking, nonblocking, select, poll, epoll/kqueue, mio, tokio.

Rust

bytekv

A single-threaded, event-loop-driven key-value store in C — kqueue, AOF persistence (CRC64), fork-based compaction. libc-only, ~2.7K LOC.

C • 1 star

Skills/Languages

C, Rust, Zig, Go, TypeScript. TCP/IP, networking internals, distributed systems, storage engines, OS primitives. Solana. PostgreSQL, Redis.

Currently learning

Solana internals. Rust, Zig, C and OS fundamentals via OSTEP.
Networking primitives from scratch.
Reading source, building small reproductions where things get confusing.