The Evolution of Security at Riot

Hey folks! We’re Mark Hillick, Jason Clark, and David Rook from the Riot Security team and we’re here to discuss how the security program at Riot has evolved over the last 4 years. This is our first article in a series of security articles so it’ll be more high-level, but keep an eye on the tech blog in the future for all the juicy techy bits.

Full Story
Posted by Mark Hillick, Jason Clark, and David Rook



Determinism in League of Legends: Implementation

Taking the League of Legends game server from a nondeterministic process to its current state required almost a full year of effort from multiple engineers. As a side benefit of this effort, we holistically improved the codebase’s robustness, discoverability, and maintainability. We removed swaths of dead or redundant code and created new opportunity spaces for gameplay exploration.

Full Story
Posted by Rick Hoskinson

Determinism in League of Legends: Introduction

Hi, I’m Rick Hoskinson, an engineer on the Deterministic Disaster Recovery team, and I’m here to talk about how we gave ourselves the power to turn back the hands of time in League of Legends. In this series of blog posts, I hope to give you a glimpse of what that work looked like, juicy technical challenges and all. In this first post, I’ll introduce the problem and how we chose to solve it. 

Full Story
Posted by Rick Hoskinson

Blitzcrank Bot

Hey everyone, my name is Michael Hill and I’d like to introduce you to Riot’s automated ticket agent, Blitzcrank Bot.

Full Story
Posted by Michael Hill

Better Living Through Materials

Hi, I’m Paul Geerts and I’m one of the engineers on League’s Render Strike Team. A while back my buddy Tony posted an article about how League of Legends currently builds a single frame of the action. Today, I’d like to dive into a component of the rendering pipeline that we’re actively improving: materials. I’ll discuss some of the changes we’ve made and why they’re important for players and developers alike.

Full Story
Posted by Paul Geerts

Running Online Services at Riot: Part III: Part Deux

In our previous article, we discussed some of the networking involved in rCluster, Riot’s solution for worldwide application deployments. Specifically, we talked about the concept of overlay networks, an implementation we leverage called OpenContrail, and how that solution plays with Docker. In this post, we’ll build on that foundation and dive deeper on other topics: infrastructure as code, load balancing, and failover testing.

Full Story
Posted by Doug Lardo and David Press

Debugging Titles: Part III

In my last two articles, I introduced Masteries - our framework for clarifying career progression within Riot Engineering. I covered the design of the system and how we arrived at version 1.0. In this article, I’ll discuss the rollout, lessons learned, and our plans for the future of Masteries.

Full Story
Posted by Mike Seavers