--- title: Haskell in Mercury: Interview with Max Tagher | daily.dev description: Max Tagher, CTO of Mercury, discusses why the fintech startup chose Haskell from inception. The decision was driven by the need for type safety and correctness... canonical: https://daily.dev/posts/haskell-in-mercury-interview-with-max-tagher-ah0rkc4d9 twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Haskell in Mercury: Interview with Max Tagher | daily.dev og:description: Max Tagher, CTO of Mercury, discusses why the fintech startup chose Haskell from inception. The decision was driven by the need for type safety and correctness... og:url: https://daily.dev/posts/haskell-in-mercury-interview-with-max-tagher-ah0rkc4d9 og:image: https://api.daily.dev/og/posts/Ah0RKc4d9.png og:image:alt: Haskell in Mercury: Interview with Max Tagher 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. # Haskell in Mercury: Interview with Max Tagher **[Serokell](https://daily.dev/sources/serokell)** · 25 min read · 0 upvotes · 0 comments ## Summary Max Tagher, CTO of Mercury, discusses why the fintech startup chose Haskell from inception. The decision was driven by the need for type safety and correctness in banking applications, where runtime errors could erode customer trust. Haskell's powerful type system prevents bugs at compile time and has unexpectedly become Mercury's easiest role to fill, attracting top talent including Haskell book authors. The company now has 200 engineers working with a 1.2 million line Haskell codebase and contributes to GHC compiler performance improvements. Tagher emphasizes that Haskell's compile-time guarantees, immutability, and type safety features align well with business requirements for financial applications, though he acknowledges trade-offs in initial setup time and build speeds. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [A Couple Million Lines of Haskell: Production Engineering at Mercury](https://daily.dev/posts/a-couple-million-lines-of-haskell-production-engineering-at-mercury-apjrivjvs) · Hacker News · 1 upvotes · 0 comments - [Enterprise Haskell at H-E-B](https://daily.dev/posts/enterprise-haskell-at-h-e-b-sjpe3tn1b) · Lobsters · 0 upvotes · 0 comments - [Mitchell Vitez](https://daily.dev/posts/mitchell-vitez-k7xy6fvhi) · Lobsters · 0 upvotes · 0 comments - [From Scientific Computing to Type-Safe Finance: Bitnomial](https://daily.dev/posts/from-scientific-computing-to-type-safe-finance-bitnomial-gdutkjlto) · Serokell · 0 upvotes · 0 comments - [Haskell in Production: Scrive](https://daily.dev/posts/haskell-in-production-scrive-afcztblsi) · Serokell · 0 upvotes · 0 comments --- Tags: [#fintech](https://daily.dev/tags/fintech), [#functional-programming](https://daily.dev/tags/functional-programming), [#haskell](https://daily.dev/tags/haskell), [#postgresql](https://daily.dev/tags/postgresql) [View this post on daily.dev](https://daily.dev/posts/haskell-in-mercury-interview-with-max-tagher-ah0rkc4d9) ```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":"Haskell in Mercury: Interview with Max Tagher","url":"https://daily.dev/posts/haskell-in-mercury-interview-with-max-tagher-ah0rkc4d9","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/haskell-in-mercury-interview-with-max-tagher-ah0rkc4d9"},"datePublished":"2026-02-04T12:53:50.487Z","dateModified":"2026-03-15T03:41:38.407Z","description":"Max Tagher, CTO of Mercury, discusses why the fintech startup chose Haskell from inception. The decision was driven by the need for type safety and correctness...","image":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/d4adf1838f3dec6a09a8b0169fd70674?_a=AQAEulh","thumbnailUrl":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/d4adf1838f3dec6a09a8b0169fd70674?_a=AQAEulh","isAccessibleForFree":true,"articleSection":"Serokell","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":"Serokell","logo":"https://media.daily.dev/image/upload/t_logo,f_auto/v1/logos/e9d268330ce14343a9e3875ff97aa4c3","url":"https://daily.dev/sources/serokell"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/haskell-in-mercury-interview-with-max-tagher-ah0rkc4d9","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":0},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"fintech,functional-programming,haskell,postgresql","timeRequired":"PT25M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"Serokell","item":"https://daily.dev/sources/serokell"},{"@type":"ListItem","position":3,"name":"Haskell in Mercury: Interview with Max Tagher"}]} ```