I Built a Chrome Extension That Scores Every Job I Apply For
Active job searching is a numbers game. You're opening dozens of tabs, reading through job descriptions, trying to figure out which roles are actually worth your time and which ones are going to be a waste of a first-round call. After going through this enough times, I decided to build something to help.
The result is Job Fit Analyst, a Chrome extension that reads a job listing on LinkedIn or Workday and instantly gives me a fit score, an interview odds score, and a detailed breakdown of why — all in one click.
The Idea
The concept was simple. I wanted something that already knows my background and what I'm looking for, and can evaluate a job posting against all of that without me having to do it manually every single time.
I built it using ChatGPT Codex 5.5. No prior coding experience required. Just a clear idea of what I wanted and the ability to describe it well.
Here was my first prompt to kick things off:
"I want to build a chrome extension that will use my resume and experience and what I am looking for in a job and be able to read a webpage like linkedin or workday to be able to give each job a fit score and a score based on my likelihood to be interviewed. This would be based on reading the job title and description. Once you have an idea of what I want to build and the plan for it, then I can give you my resume and other details."
Codex laid out the structure of what we were building. Then I fed it the real substance.
What I Fed It
Once the plan was set, I shared my resume and filled in some context that isn't on it. I mentioned my time at Bloomberg LP, a couple of early fintech internships, and two ventures I co-founded: Snackr, a food discovery app I raised $15K in angel funding to build, and CrowdfundU, an organization I started at the University of Miami that provided free consulting to students trying to raise money on crowdfunding platforms.
I also gave it a picture of what I'm looking for now: the role levels I'm targeting, the geographic markets I'd consider (Tampa Bay first, with Miami and remote as secondary options), and my general priorities when sizing up an opportunity. I also instructed it to flag risks it detects in any given role, since not every listing is what it appears to be on the surface.
What It Does
When I land on a job listing and click the extension, it automatically reads the page and produces:
A Fit Score and an Interview Odds score, each out of 100
A breakdown across five dimensions: title and seniority, skill match, location preference, compensation, and risk adjustment
An overall verdict (Strong Apply, Consider, or Pass)
A list of keywords to emphasize in my application based on that specific posting
A Watch Items section that flags anything worth knowing going in
In the screenshot above, the extension is evaluating a Senior Finance Manager role at Alight Solutions. It came back with an 85 Fit Score and 87 Interview Odds, rated it a Strong Apply, and highlighted terms like strategic finance, financial planning and analysis, long-range planning, forecasting, and budgeting as areas to lean into. Watch Items came back clean.
That kind of output in under two seconds is genuinely useful.
One Small Tweak
The first version of the extension required clicking a button inside the panel to trigger the analysis. That worked, but it was one more step than I wanted. I added one more prompt:
"Can you change it so that the extension automatically reads the page to determine a fit? So when I click the extension button I want to see the result and not have to click another button to see the results."
Done. One click, instant results.
The Bigger Point
I am not a developer. I have never written production code. But I had a real problem, I knew what a good solution would look like, and I could describe it clearly enough for an AI to build it.
That is the part worth paying attention to. The barrier to building useful tools is lower than most people assume right now. If you can think through a problem and communicate it well, you can build things that actually work. Prompt engineering is a real skill, and it is one that pays off fast.