Matthew Weidner

I am a software developer at Common Curriculum. I am also an (absentia) computer science PhD student at Carnegie Mellon University, advised by Heather Miller.

I research building blocks for collaborative and local-first software - in particular, Conflict-free Replicated Data Types (CRDTs).

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mweidner037 [at] gmail.com • @MatthewWeidner3 • @mweidner.bsky.social • LinkedIn • GitHub

Blog  •  Open-Source Software  •  Apps  •  Research Papers

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Blog

Developer-oriented descriptions of collaborative data structures and my own research.

Collaborative Text Editing without CRDTs or OT
2025/05/21

Architectures for Central Server Collaboration
2024/06/04

Announcing list-positions
2024/04/29

CRDT Survey (Series):

• Part 1: Introduction
  2023/09/26
• Part 2: Semantic Techniques
  2023/10/17
• Part 3: Algorithmic Techniques
  2024/02/13
• Part 4: Further Topics
  2024/02/13

“Position Strings” for Collaborative Lists and Text
2023/04/13

Fugue: A Basic List CRDT
2022/10/21

Designing Data Structures for Collaborative Apps
2022/02/10

• Slides from a talk about this post at the UCSC Languages, Systems, and Data Seminar.

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