Today we’re publishing Brink's 2025 Engineering Impact Report covering the work of the eight Bitcoin Core engineers we funded last year and why we think this work is important.
https://brink.dev/blog/2026/03/26/engineering-impact-report-2025/
We highlight the broader categories of work that Brink engineers performed in 2025 including:
- Code Review
- Testing and Bug Fixes
- Fuzzamoto
- The First Independent Security Audit of Bitcoin Core
- Release Management
- Build System
- Libsecp256k1
- Bitcoin Kernel
- Building on Bitcoin's Existing Capabilities
We’ve included a selection of highlighted contributions for each engineer we fund:
- Marco De Leon
- Sebastian Falbesoner
- Michael Ford
- Niklas Gögge
- Fabian Jahr
- Eugene Siegel
- Hennadii Stepanov
- Stéphan Vuylsteke
The full report includes more details on the projects, PRs, and accomplishments of each Brink engineer in 2025 and why we think this work is important and impactful to Bitcoin.
https://brink.dev/assets/files/brink-engineering-report-2025.pdf
For those wanting an even deeper look, we have compiled companion reports for each engineer:
- A markdown file explaining all authored PRs
- A CSV containing each authored PR
- A CSV linking to each PR reviewed
None of this work would be possible without the generosity of Bitcoiners who share our mission of strengthening Bitcoin by ensuring that Bitcoin's codebase continues to be maintained, tested, reviewed, and improved in a “Move slow, fix things” fashion. Thank you.
This sounds pretty good!
Also, reading this report is making me realize there was a lot of stuff I didn't pay enough attention to last year. Especially Fuzzamoto. And the stuff I did pay attention (eg. Bitcoin Kernal) I could stand to spend more time on. Lots of great projects moving forward because of Brink.
Excellent work!
Here is more on Fuzzamoto: https://brink.dev/blog/2026/01/07/fuzzamoto-introduction/
This might be a good place to play with Kernel: https://github.com/stickies-v/py-bitcoinkernel