Blackreach
Browser automation · Python
Public sourceA browser agent for navigating pages, collecting information and checking downloaded files. The work behind it is as important as the demo: making failures visible and keeping task state honest.
I build browser agents and practical AI tools.
I'm Josimar Lee, a self-taught developer in Toronto. I build browser automation, agent tools, and software that takes manual work off people's hands.
My focus is what happens after the first demo: tracking progress, handling failures, and checking the result.
Open to full-time software, AI tooling and technical customer roles.
Blackreach: one task, three sources30 sec
A closer look at the work.
All projectsHuginn
Web data · Python / FastAPI
Public sourceA self-hosted API for collecting content from web pages. It separates data collection from the agent deciding what to do, with explicit job status and retry behavior.
Lethe
Agent evaluation · Research
Public experimentAn experiment in measuring how agent behavior changes during longer tasks. It explores a question I keep running into: how do you check whether a run is still doing what it was asked to do?
These are independent projects built with substantial help from Codex and Claude Code. I direct the work, review changes, and test the results. The case studies explain the evidence and its limits.
Start with a real problem.
Some of the most useful work starts with an ordinary, repetitive task.
At my retail job, I built an inventory workflow to replace a slow manual process. Working with the people using it gave me specific problems to fix and feedback I could test.
That carries into my independent projects. I prefer a small working slice, a way to check it, and clear notes about what still needs work.
More about how I workNotes from building.
All writingBlackreach said incomplete. I needed to know why.
A blank page, clearer run outcomes, and a controlled recovery test.
Read the engineering notesA protein-model experiment, including the result that failed
Why a useful benchmark result did not settle the question of whether the model would transfer.
Read the experimentLet's talk about the work.
I'm looking for a team building browser tools, AI applications or useful developer infrastructure. I'm also interested in technical customer roles where understanding the problem is part of the engineering.
Toronto, Canada · remote work or relocation
Email JosimarRead my résuméBrowse my GitHub
For a bounded consulting project, see the reliability offer.