--- title: How To Review Code That Deals With Money | daily.dev description: A systematic 4-step approach to reviewing code in financial systems: start with test files to understand context, verify alignment with issue requirements,... canonical: https://daily.dev/posts/how-to-review-code-that-deals-with-money-cs2oqhmxw twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: How To Review Code That Deals With Money | daily.dev og:description: A systematic 4-step approach to reviewing code in financial systems: start with test files to understand context, verify alignment with issue requirements,... og:url: https://daily.dev/posts/how-to-review-code-that-deals-with-money-cs2oqhmxw og:image: https://api.daily.dev/og/posts/Cs2OqHmxw.png og:image:alt: How To Review Code That Deals With Money og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # How To Review Code That Deals With Money **[The PayEng Playbook](https://daily.dev/sources/alvaroduran)** · 10 min read · 17 upvotes · 0 comments ## Summary A systematic 4-step approach to reviewing code in financial systems: start with test files to understand context, verify alignment with issue requirements, mentally solve the problem yourself, then compare the actual implementation against your approach. This method helps catch errors early, provides deeper understanding, and is especially critical for payment systems where mistakes can be costly. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: --- Tags: [#code-review](https://daily.dev/tags/code-review), [#fintech](https://daily.dev/tags/fintech), [#testing](https://daily.dev/tags/testing) [View this post on daily.dev](https://daily.dev/posts/how-to-review-code-that-deals-with-money-cs2oqhmxw) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"How To Review Code That Deals With Money","url":"https://daily.dev/posts/how-to-review-code-that-deals-with-money-cs2oqhmxw","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/how-to-review-code-that-deals-with-money-cs2oqhmxw"},"datePublished":"2025-09-17T09:09:36.364Z","dateModified":"2026-03-15T05:24:47.190Z","description":"A systematic 4-step approach to reviewing code in financial systems: start with test files to understand context, verify alignment with issue requirements,...","image":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/e0d540474b95cdf6c2c976aeb86ba8ba?_a=AQAEulh","thumbnailUrl":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/e0d540474b95cdf6c2c976aeb86ba8ba?_a=AQAEulh","isAccessibleForFree":true,"articleSection":"The PayEng Playbook","inLanguage":"en","publisher":{"@type":"Organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180}},"author":{"@type":"Organization","name":"The PayEng Playbook","logo":"https://media.daily.dev/image/upload/s--F741aE6c--/f_auto/v1733559638/logos/alvaroduran","url":"https://daily.dev/sources/alvaroduran"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/how-to-review-code-that-deals-with-money-cs2oqhmxw","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":17},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"code-review,fintech,testing","timeRequired":"PT10M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"The PayEng Playbook","item":"https://daily.dev/sources/alvaroduran"},{"@type":"ListItem","position":3,"name":"How To Review Code That Deals With Money"}]} ```