Frontend Engineer

Blacksmith
New York, NY

Overview

At Blacksmith, we provide cloud infra to help companies run their CI (GitHub Actions) substantially faster and cheaper. Our mission is to build a CI cloud. Our bet is that CI, as a class of workloads, is ready to be unbundled from the hyperscaler clouds (AWS/GCP/Azure). This is a bold statement, and we have an ambitious roadmap ahead.


Some things we're proud of

  • We orchestrate millions of VMs for CI jobs each month over our own fleet of bare metal hardware.

  • We power CI for 600+ fast-growing startups like Ashby, Slope, AtoB, Pylon, Superblocks, and Finch.

  • Founders: Aditya Maru and Aayush Shah were early systems engineers at Cockroach Labs. Aditya (JP) Jayaprakash worked on search infra and was later a founding member of the ads team at Faire.

  • We went through Y Combinator's W24 batch and raised our seed round from a Tier 1 VC firm.

  • We're growing extremely fast and have more than 6x'ed our revenue in the last 4 months with a team of just 4.

You are a good fit if you

  • Have strong CS fundamentals and a deep understanding of React and modern frontend development.

  • Can work closely with design to build polished, high-performance UIs — and aren’t afraid to go deep on browser performance, rendering bottlenecks, or complex component architecture.

  • Have 2+ years of software development experience.

  • Enjoy working in person 5 days a week in NYC.

  • Enjoy working at a very early-stage startup and are comfortable with ambiguity.

Bonus

  • You’ve dabbled in your own side hustles or start-up projects.

  • You’re comfortable creating new processes and iterating on them quickly.

Compensation and benefits

  • Medical, Vision, and Dental insurance.

  • Competitive base + equity.

  • Unlimited PTO.

  • Quarterly offsite.

Posted 2026-01-16

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