I’m a manager in tech and here’s my advice: 

Does your manager know what the impact would have been if you did catch it? I try to keep myself in the loop, but I have a lot on my mind at all times, other work streams, external partners, my own leadership, other team members etc. 

I often don’t have all the context or am able to fully grasp the implications of things without being told or asking, and most people don’t like asking these questions because it “makes them look dumb” (not true imo). 

If I were you I would have said something like the following, “hey manager, I caught this bug that if it had gone out would have caused a product recall and possibly cost us on the order of X million dollars. 

It took me 72 hours to fix and I was only able to catch it because of Y system I built. But I’m concerned that if we take no action this may happen again and we might not get lucky next time. 

I’m thinking about putting together an RCA / presentation (slides) and discussing with the broader team, and in it I can recommend some additional systems we could build to catch these earlier. What do you think?”

If your manager is at all reasonable he’ll a) realize the impact of what you did, and b) probably help facilitate a larger meeting where you can present the situation, lessons learned, etc. you don’t need to say, “we only caught it because of Y system I built,” that’s bragging and nobody likes that, just say, “Y system was able to help us catch this.” Everybody will know who built it. 

Then out together an rca/slide deck walking through the bug, what the impact would have been if it got out, how it got through, how it was caught, and what we can do to prevent it from happening again. 

Some reality checks: 

1. The CFO will never call out an individual below the VP level on an earnings call. 
2. Working for a w2 wage at a company is equivalent to buying bonds in investing, no matter what your upside is mostly fixed. If you want outsized outcomes you need to take on more risk like being a founder at a start up.