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Tinder Engineering Blog

5 min read

What Recommendation Embeddings Can—and Can’t—Teach Us About Users

An AI Day project turned opaque learned representations (embeddings) into a reusable way for the Recommendations and Consumer Research teams to ask better product questions together.
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Engineering
15 min
 read

What Recommendation Embeddings Can—and Can’t—Teach Us About Users

An AI Day project turned opaque learned representations (embeddings) into a reusable way for the Recommendations and Consumer Research teams to ask better product questions together.
Engineering
15 min
 read

When Your Model Hates Helicopters: Getting LLM Features From "It Works" to "We'd Bet On It"

A post about two photo Tinder® features we built on our team (Photo Feedback and a hybrid Smart Photo ordering model), and what it actually took to get them there.
Engineering
10 min
 read

Merlin: The Tinder® Harness Around AI Coding Agents

AI coding agents can write code. Merlin turns that capability into a reliable workflow: planning the work, verifying changes, asking for help when needed, and producing results people can review.
Engineering
5 min
 read

Upgrading Tinder to Xcode 26 with Cursor

How Tinder used AI-powered development workflows to turn one of its most complex iOS upgrades into a faster, safer, and surprisingly scalable migration.
Engineering
10 min
 read

Undercover Agent: How We Built an AI That Tests Coverage While We Sleep

We built an AI agent at a TinderⓇ hackathon that writes automated unit tests, won the engineering track, and deployed it straight into our CI pipeline. Here’s what we learned.
Engineering
5 mins
 read

A Non-Engineer’s Translation Guide to Living With One

Match Group CEO Spencer Rascoff shares some favorite moments from when workplace language collides with real life, and what it reveals about engineering culture at its best.
Engineering
10 min
 read

Tinder API Style Guide: Part 2

How Tinder unified fragmented data models into a single, governed Protobuf system to improve reliability, consistency, and developer velocity at scale.
Engineering
10 min
 read

How Tinder® Uses AI to Rank Profile Photos

An inside look at how Tinder’s VLM-based system reframes photo ranking through pairwise comparisons to improve matches, likes, and meaningful connections.
Engineering
5 min
 read

How to Hire a Great CTO (Even If You’re Not a Technologist)

Finding a CTO who balances technical depth with leadership is tough. Read how Tinder’s CEO approached the search, prioritizing hands-on experience, AI readiness, and cultural fit.
Engineering
5 min
 read

Boosting iOS Development Efficiency With AI: Practical Techniques for a Large-Scale Codebase

Learn about the concrete prompting strategies and techniques that are effective for iOS development at scale.
Engineering
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How We Decomposed Tinder’s Monolith

Monoliths are frustrating for developers, and they can have a profound effect on your organization; they slow down your team and your ability to drive important changes in your codebase.
Engineering
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How On-Device AI Models Find Your Best Tinder Profile Photos

At Tinder, the quality of your profile photos is paramount. However, asking users to manually sift through their entire camera roll to select images that best represent them can be an overwhelming task.
Engineering
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Tinder’s migration to Elasticsearch 8

Tinder ES plugin is a crucial in-house technology that allows us to run complex, observable, efficient and testable scoring algorithms written in Java.
Engineering
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Sharing Tinder’s latest contributions to the open source community

At first glance, Tinder might seem like a simple application. But when you look under the hood, there are a lot of complexities to consider when building the experience that our users know and love today.
Engineering
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How Tinder Eased Development Pain With Ignis

Latency in the development loop caused a significant bottleneck in our feature development and reduced overall stability. That's where Ignis came in.
Engineering
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Tinder API Style Guide-Part 1

Learn how we streamlined and updated our methodologies to maintain consistency and scalability of the Tinder app.
Engineering
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Identifying vulnerabilities in GitHub Actions & AWS OIDC Configurations

Through this blog, we will share examples of vulnerable configuration, case-studies with external organizations, mitigation examples, and abuse identification techniques.
Engineering
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Building Obsidian, Tinder’s Design System

This post explores the creation of Obsidian, Tinder's design system.
Engineering
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How to Categorize and Prevent Risks of Sensitive Links in URLScan

Learn how we mitigate and prevent accidental indexing of sensitive links.
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