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Revin

Senior engineering squads, embedded in your team. Essays on software engineering, security and technical decisions. Originals at revin.com.br

Joined Joined on  Personal website https://revin.com.br
I counted scope changes with gh and jq: 41 of 118 issues arrived after the freeze, 3 got a new date
revinsoftware profile

I counted scope changes with gh and jq: 41 of 118 issues arrived after the freeze, 3 got a new date

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5 min read
I ran git blame on the files that touch money: 87% of the commission logic had one author
revinsoftware profile

I ran git blame on the files that touch money: 87% of the commission logic had one author

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5 min read
PHPCompatibility flagged 217 errors in a PHP 5.6 app. The one that cost money wasn't in the report
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PHPCompatibility flagged 217 errors in a PHP 5.6 app. The one that cost money wasn't in the report

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5 min read
I pointed an AI reviewer at a 2019 order service: 63 comments, and none of them was the IDOR
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I pointed an AI reviewer at a 2019 order service: 63 comments, and none of them was the IDOR

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4 min read
An agent wrote 14 tests for a module I knew was broken. Mutation score came back 41%
revinsoftware profile

An agent wrote 14 tests for a module I knew was broken. Mutation score came back 41%

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4 min read
I inherited an undocumented codebase: 2.5 days to boot it, ~400 silent errors a day
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I inherited an undocumented codebase: 2.5 days to boot it, ~400 silent errors a day

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6 min read
The code that passes the pitch and fails due diligence
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The code that passes the pitch and fails due diligence

#softwareengineering #founders #softwaredevelopment #startup
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5 min read
I changed one number in the URL and saw another customer's orders
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I changed one number in the URL and saw another customer's orders

#softwareengineering #softwaredevelopment #product #founders
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5 min read
High test coverage is where production bugs hide best
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Revin

High test coverage is where production bugs hide best

#softwareengineering #softwaredevelopment #product #founders
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5 min read
Security isn't a feature you bolt on. It's how the team works.
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Revin

Security isn't a feature you bolt on. It's how the team works.

#softwareengineering #founders #product #softwaredevelopment
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6 min read
It was fast in the demo. Then the data grew.
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Revin

It was fast in the demo. Then the data grew.

#softwareengineering #softwaredevelopment #product #startup
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5 min read
Why EU startups are trading Poland/Romania for Brazil in 2026
revinsoftware profile
Revin

Why EU startups are trading Poland/Romania for Brazil in 2026

#softwareengineering #founders #startup #softwaredevelopment
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3 min read
The estimate that wins the deal is the one that slips the most
revinsoftware profile
Revin

The estimate that wins the deal is the one that slips the most

#softwareengineering #founders #product #softwaredevelopment
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5 min read
Threat modeling in 1 hour: the method senior squads use for teams without a security engineer
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Revin

Threat modeling in 1 hour: the method senior squads use for teams without a security engineer

#softwareengineering #softwaredevelopment #founders
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3 min read
Hard conversation: how the CTO communicates the product needs a rewrite
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Hard conversation: how the CTO communicates the product needs a rewrite

#softwareengineering #founders #product
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4 min read
Who Found the Outage First — You or Your Customer?
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Who Found the Outage First — You or Your Customer?

#softwareengineering #softwaredevelopment #product #startup
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6 min read
Why I almost never approve a full rewrite of your product
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Why I almost never approve a full rewrite of your product

#softwareengineering #founders #product #softwaredevelopment
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5 min read
The team they sold you isn't the team that ships your code
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The team they sold you isn't the team that ships your code

#softwareengineering #softwaredevelopment #founders #startup
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6 min read
Squad as a service: what it is and when it makes sense
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Squad as a service: what it is and when it makes sense

#softwareengineering #product #startup #softwaredevelopment
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5 min read
How much does a development squad cost in 2026?
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How much does a development squad cost in 2026?

#softwareengineering #founders #startup #softwaredevelopment
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5 min read
Your last vendor is still logged into your production
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Your last vendor is still logged into your production

#softwareengineering #softwaredevelopment #founders #startup
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6 min read
The 5 third-party SaaS nobody audits (and that become attack doors)
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The 5 third-party SaaS nobody audits (and that become attack doors)

#softwareengineering #softwaredevelopment #founders
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3 min read
How to measure real seniority (without trusting resumes)
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How to measure real seniority (without trusting resumes)

#softwareengineering #softwaredevelopment #founders #product
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3 min read
I turned down a $480k contract. I'd do it again.
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I turned down a $480k contract. I'd do it again.

#softwareengineering #founders #startup #softwaredevelopment
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4 min read
The stack you never update sends its bill without warning
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The stack you never update sends its bill without warning

#softwareengineering #softwaredevelopment #product #startup
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5 min read
Tech debt is a risk spreadsheet, not an engineering complaint
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Tech debt is a risk spreadsheet, not an engineering complaint

#softwareengineering #softwaredevelopment #founders #product
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4 min read
I inherited a 50-minute deploy, and it was the best news in the audit
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I inherited a 50-minute deploy, and it was the best news in the audit

#softwareengineering #founders #product #softwaredevelopment
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5 min read
I paid for the same feature three times. The money was the least of it
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I paid for the same feature three times. The money was the least of it

#softwareengineering #founders #softwaredevelopment #product
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5 min read
Who actually owns your code? The answer is usually worse than you think
revinsoftware profile
Revin

Who actually owns your code? The answer is usually worse than you think

#softwareengineering #founders #startup #softwaredevelopment
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5 min read
We audited 31 broken codebases. The same numbers keep coming back.
revinsoftware profile
Revin

We audited 31 broken codebases. The same numbers keep coming back.

#softwareengineering #founders #product #softwaredevelopment
Comments
5 min read
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