Francis Sunday

A photo of Francis Sunday

Hi šŸ‘‹šŸ¾ I'm Francis, a software engineer with a passion for building amazing products and systems. I've built financial systems, compliance workflows, monitoring tools, and developer tools. I work primarily with Go and Haskell, and I'm deeply interested in distributed systems, databases, and functional programming.

Feel free to read about myself, look at my posts, or book a chat with me.

Writing

Bounded Execution for AI Coding Agents January 9, 2026
Idiomatic Haskell Refactors October 19, 2025
Parsing, Not Guessing June 14, 2025
import "reflect" June 10, 2025
Maps Don't Shrink in Go May 27, 2025
more posts ā†’

Projects

alpf

Agentic Loop with Promise Fulfilment, a deterministic framework for agents to retry tasks until a promise is fulfilled.

go
snipp

Minimalist macOS screenshot utility built with Rust + Tauri v2.

rust tauri
Fake.hs

A minimalist Haskell faker library for generating fake data in tests, built with the State monad.

haskell
more projects ā†’