- Joined
- Feb 2026
- How they joined
- Directly
- Before Cognition
- Jane StreetSoftware Engineer
- Status
- Current
Overlapped before Cognition
Sources1linkedin.com
Details
LocationSan Jose, California, United States
Company sitecognition.ai
UniversityUniversity of California, Berkeley
LinuxNix (Package Manager)Information SecurityWeb DevelopmentRustPython (Programming Language)Rust (Programming Language)BashGo (Programming Language)RISC-VSystems Programming
Notes
- Credited publicly by Cognition's Matt Schrage as part of the cross-company team behind the Devin CLI, working with Nikhil Jha, @mcparadip, Dev Mchheda and @_seanyneutron 'on frontier agent harness and custom TUI rendering in Rust' alongside Silas Alberti's research team that trained SWE-1.6 Fast for the CLI. His earlier terminal multiplexer 3mux makes TUI rendering a natural fit.May 13, 2026
- Created AsciiDots, an esoteric language based on ASCII art (about 1.2k stars); his site says it has been credited as inspiring several other languages, and he re-posted it to HN in Aug 2025 with an in-browser Pyodide playground.Aug 18, 2025
- Interned at Jane Street as a Software Engineer Intern in New York (May-Aug 2023) and returned full-time in Aug 2024.May 2023
- Wrote 'Cross-compiling to Redox using Nix' on the Redox OS blog after nixpkgs merged PR #93568 enabling Nix cross-compilation to Redox; he built the redoxpkgs overlay.Jul 22, 2020
- Created 3mux, a Go terminal multiplexer inspired by i3wm (about 1.9k GitHub stars); launched as 'Show HN: Terminal Multiplexer Inspired by I3' (108 points).Apr 11, 2020
- Created DNS over Wikipedia, a Rust browser extension redirecting .idk domains via Wikipedia infoboxes (about 1.6k stars); its Show HN reached 398 points.Apr 6, 2020
- Public headline says "SWE @ AI startup | UC Berkeley 2024".
- Started a technical Substack; inaugural post (May 31, 2026, during his Cognition tenure) covers using Marzullo's algorithm to sync lights to music in the DJ booth at house parties.May 31, 2026Syncing lights with music: Marzullo's algorithm in the DJ booth - "One of my favorite side projects is automatically syncing lights with music at house parties."
- UC Berkeley BA in Computer Science, 2020-2024.2024
- Quant Systems Intern at The D. E. Shaw Group in New York (May-Aug 2022).May 2022
- Nix ecosystem contributor: member of the nix-community GitHub org, contributor to rnix (Rust Nix parser) and author of nix-eval-lsp, a Nix language server that evaluates code.Jun 2021
- Information Security Engineer Intern at LinkedIn in Sunnyvale (May-Aug 2021).May 2021
Experience
Member of Technical Staff at Cognition
Feb 2026 - May 2026
Software Engineer at Jane Street
Aug 2024 - Jan 2026
New York, New York, United States
Software Engineer Intern at Jane Street
May 2023 - Aug 2023
New York, New York, United States
Quant Systems Intern at The D. E. Shaw Group
May 2022 - Aug 2022
New York City Metropolitan Area
Information Security Engineer Intern at LinkedIn
May 2021 - Aug 2021
Sunnyvale, California, United States
Intern, Full stack at Metaculus
Jan 2021 - Apr 2021
Metaculus is a forecasting technology platform that optimally aggregates quantitative predictions of future events.
Summer Intern at SiFive
Jun 2018 - Aug 2020
Education
University of California, Berkeley
Jan 2020 - Jan 2024
Bachelor of Arts - BA, Computer Science
Recent posts
May 2026
Syncing lights with music: Marzullo's algorithm in the DJ booth - "One of my favorite side projects is automatically syncing lights with music at house parties."
April 2020
Show HN: Terminal Multiplexer Inspired by I3
Show HN: DNS over Wikipedia
August 2025
Show HN: Asciidots - a 2d esoteric language based on ASCII art
Profiles
Code
Repos126
Repos
Aaronjanse/3muxAaronjanse/dns-over-wikipediaAaronjanse/asciidotsAaronjanse/nix-eval-lspAaronjanse/marble-completeAaronjanse/dotfilesAaronjanse/gcataaronjanse/bootstrapOS
Languages
JavaScriptHTMLPythonGoRustTypeScriptShellJupyter Notebook
