advertise
Reach data engineers mid-build.
Your line shows in the terminal while dbt, cargo, docker, gradle, BigQuery and Snowflake jobs, and Claude Code / Codex sessions run — the one moment a developer is guaranteed to be watching and guaranteed to be idle. No cookies, no retargeting, no browser. One dim, clearly-labeled line.
inventory
Why this slot is different
Command-level targeting
Buy only the developers running
dbt, or only Rust compiles — segments no other network can sell, with zero content read.Verified dwell
A footer during a 15-minute build is continuous attention with no tab to switch away to.
Interactive terminals only
We never bill impressions no human is watching — scheduled headless runs don't count, ever.
format
One line, in the running command.
adYour product — one line, 120 characters, linked
pricing
A ledger, not a raw table.
Unit
Block of 1,000 impressions, five visible seconds each
1,000
Clicks
Billed at 50x the per-impression rate
50×
Targeting
By command — dbt, cargo, docker — or broad developer wait-time
cmd
Launch pricing
Flat monthly founding slots while volume builds; auction later
locked
founding slot
Reserve launch inventory.
Email ads@backfill.sh with your one-liner and target commands. Founding advertisers lock launch pricing for 12 months.