ulo
A macro that cannot see a type's impl block should emit the same call for every type and let method resolution choose the definition, rather than detect what the type defines.
unpublished · in development · ulo-rs/ulo ↗
IFEANYI
Systems engineer
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Work
A 24-hour hold on the seller's share
Sellers were paid one day after each sale, so a buyer with a bad code could still be refunded.
Voucher marketplace · backend · 2024–25
An ffmpeg relay between every camera and Cloudflare
A court's stream ran only while a paid session did, through three pipelines in turn, the last one on the platform's own server.
Live-streaming platform for sports venues · contract · 2025–26
Liquidation that ran only when the client polled
Positions were closed for insufficient margin only when the account screen was loaded; the check became a 30-second job with one margin formula.
Forex trading platform · contract · 2025
Fixing money calculations with no automated tests
Leverage, margin, liquidation and transactions were fixed in the inherited code over 29 days, each change tried by hand in a staging environment before release.
Forex trading platform · contract · 2025
Lab
winston
A backpressure policy is real only at the first queue that can fill, and a bounded setting in front of an unbounded buffer does nothing.
0.8.2 on crates.io · rework on a branch · ifeanyi-ugwu/winston_logger_rs ↗
graphql-scalars
A custom scalar should reject what can be judged from the value alone and pass everything else through to the resolver.
GeoJSON and CountryName in 1.24.0 · ULID and Cuid2 in 1.25.0 · graphql-hive/graphql-scalars ↗
Slippage tolerance derived from staleness
A price-deviation guard with a constant tolerance rejects honest orders whenever the client's quoted price is older than the move it measures; the tolerance has to come from how stale that price can be.
Position · from a forex trading platform, 2025
Liveness observed by the server
A guard's idleness is a conclusion the server draws from the time since the last activity, not a state the phone reports.
Design for a security workforce platform · backend unbuilt
Billing scheduled hours, paying worked hours
A client is billed the hours scheduled and a guard is paid the hours worked, at rates fixed when the shift is created.
Design for a security workforce platform · backend unbuilt
A discrepancy register
A working system that is shaped wrong is evidence of what the business needs, not a template for its replacement.
Design for a security workforce platform · backend unbuilt