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The Blacksmith blog is where our engineers tell the story of what we're building and the lessons we're learning along the way.

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Building the CI cloud: our Series C

News

Oct 21, 2026

How Blacksmith runs >10M jobs per day

Engineering

Sep 18, 2026

Does a coding agent need a face?

Product

Sep 10, 2026

US west region outage due to facility cooling loss on August 13, 2026

Engineering

Aug 19, 2026

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US west region outage due to facility cooling loss on August 13, 2026

Engineering

Aug 19, 2026

Announcing Blacksmith’s Series B led by Peak XV Partners

News

Aug 12, 2026

The physics of Docker build caching

Engineering

Jul 31, 2026

Why I joined Blacksmith to work on storage again

Engineering

Jul 24, 2026

Blacksmith outage on July 21, 2026

Engineering

Jul 22, 2026

What is your CI job talking to?

Engineering

Jul 20, 2026

Closed-loop development: how we shipped Mac runners in 3 weeks

Engineering

Apr 16, 2026

How Blacksmith survives ISP degradation with Tailscale Services

Engineering

Dec 18, 2025

The GitHub Actions control plane is no longer free

News

Dec 16, 2025

How we SSH into GitHub Actions

Product

Sep 9, 2025

Reverse engineering GitHub Actions cache to make it fast

Product

Jul 23, 2025

How we built a logging platform for GitHub Actions with ClickHouse

Product

Jul 2, 2025

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