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Engineering Blog

Notes from the team on RNG design, edge networking, table mathematics, and the occasional postmortem. New posts every other Tuesday. Subscribe via RSS or the changelog newsletter on the home page.

How we cut spin latency from 18ms to 12ms

Mar 14, 2026

A walk through V8 isolate tuning, regional pinning, and a sneaky GC trick that saved 6ms.

Mikael Õun

Provable fairness, explained without the cryptography PhD

Feb 28, 2026

HMAC-SHA256, server seed, client seed, nonce — and how players verify a spin in under a minute.

Aiko Tanaka

Why we picked V8 isolates over containers for table compute

Feb 02, 2026

Cold starts under 1ms, no queue, and a postmortem on the one outage that almost made us reconsider.

Linnea Korhonen

Open-sourcing our HMAC verifier

Jan 19, 2026

A 200-line script you can run locally to validate any historical spin on the platform.

Devon Pereira

Designing the leaderboard for honesty

Dec 12, 2025

How we discourage sybil farming with proof-of-play windows and gradient-weighted scoring.

Linnea Korhonen

Postmortem: the 11-minute leaderboard freeze

Nov 03, 2025

A WebSocket fanout regression and the playbook that brought us back inside the SLA.

Site Reliability Team