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.