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walmartlabs
lacinia
Clojure2017–2020
walmartlabs / lacinia

lacinia

GraphQL implementation in pure Clojure

10Distinct people
12Mentions
0Explicit recommenders
1.9KGitHub stars
REPOSITORY AT A GLANCE

What to know before exploring

What it is

GraphQL implementation in pure Clojure

GitHub

Where it is used

No documented product use has been verified yet.

What people are saying

No recommendation phrase was found in the indexed comments.

No classified warning is attached to this page. Read the discussions before treating silence as approval.

Also in these discussions

Mentioned in the same Hacker News threads. That is not proof they are substitutes.

This week on Hacker News

Nov 7–Nov 14 UTC · Direct repository links and separately labeled related project stories. Indexed through 11/14/2026, 5:04:57 PM UTC.

No direct repository links were found in the indexed HN discussions over the past seven days. Older discussions are available below.

Mentions over time

HN mentions by year12 dated mentions

Observed mentions: 2017-03-18 14:49:58 UTC to 2020-10-01 16:15:43 UTC.

0123452017-01-01 00:00:00 UTC to 2018-01-01 00:00:00 UTC (exclusive): 5 mentions; 3 submissions, 2 comments20172018-01-01 00:00:00 UTC to 2019-01-01 00:00:00 UTC (exclusive): 4 mentions; 0 submissions, 4 comments20182019-01-01 00:00:00 UTC to 2020-01-01 00:00:00 UTC (exclusive): 1 mentions; 0 submissions, 1 comments2020-01-01 00:00:00 UTC to 2021-01-01 00:00:00 UTC (exclusive): 2 mentions; 0 submissions, 2 comments2020

Counts come from the repository’s dated source evidence. Index cutoff: 2026-11-02 08:16:59 UTC.

View mention counts and date ranges
UTC ranges include their start and exclude their end. Select a period to filter the source evidence.
PeriodStart (UTC)End (exclusive, UTC)MentionsSubmissionsComments
20172017-01-01 00:00:00 UTC2018-01-01 00:00:00 UTC532
20182018-01-01 00:00:00 UTC2019-01-01 00:00:00 UTC404
20192019-01-01 00:00:00 UTC2020-01-01 00:00:00 UTC101
20202020-01-01 00:00:00 UTC2021-01-01 00:00:00 UTC202

What Hacker News says

12 sources
WalmartLabs | Staff Software Engineer (Clojure) | REMOTE (US only) | Full-time We're a small close-knit team backed by big company resources. We write mission-critical, robust software that's used by millions of Walmart's customers daily. Our suite of software includes but is certainly not limited to: - a large distributed system that processes all store transactions from every Walmart and Sam's Club store in the US. If you've ever used Walmart Pay, this is how you get your electronic receipt! - a massive GraphQL service that powers all customer purchase & returns history for all platforms (written using our own open-source GraphQL implementation for Clojure: https://github.com/walmartlabs/lacinia). We roll out new marquee customer-facing features in this service almost weekly: everything from tire installation services to bakery orders t
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o propane tanks. - services to allow customers to manage and purchase care plans - transactional push notifications Our tech stack is: Clojure (for everything!), GraphQL, Cassandra, Kafka, Elasticsearch, Redis, Prometheus, Ruby (for some infrastructure tasks) Here's a few things we value that you should have: - A self-starter, self-accountable, curious, and DIY attitude. A lot of our bedrock technology is home-grown and written to solve our own unique Walmart-scale problems. One of the engineers on our team wrote an entire Clojure dialect (https://github.com/candid82/joker/), and scripts written in that language now do a lot of heavy lifting of our own infrastructure. - A good intuition for writing code that won't fall over under pressure and handles failure states well. We deploy daily and a null pointer might impact millions of requests in a few minutes. - An interest in doing DevOps-y stuff and a high expectation in good monitoring. We have full ownership of the life-cycle of our code and the servers it runs on. - The ability to think and work in functional languages (Clojure) - Experience writing distributed systems with a lot of message passing We've got a unique holiday shopping season coming up, and we'd love to have you join the team. If this sounds like a good fit for you, please send me an email: bcarrell@walmart.com
In Ask HN: Who is hiring? (October 2020)
WalmartLabs | Software Engineering (Clojure) | SF or REMOTE | FULL TIME We're a small close-knit team backed by big company resources. We write mission-critical, robust software that's used by millions of Walmart's customers daily. Our suite of software includes but is certainly not limited to: - a large distributed system that processes all store transactions from every Walmart and Sam's Club store in the US. If you've ever used Walmart Pay, this is how you get your receipt! - a massive GraphQL service that powers all customer purchase & returns history for all platforms (written using our own open-source GraphQL implementation for Clojure: https://github.com/walmartlabs/lacinia). We roll out new marquee customer-facing features in this service almost weekly: everything from tire installation services to bakery orders to propane tanks. -
Read the rest
services to allow customers to manage and purchase care plans - push notifications Our tech stack is: Clojure (for everything!), GraphQL, Cassandra, Kafka, Redis, Prometheus, Ruby (for some infrastructure tasks) Here's a few things we value that you should have: - A self-starter, curious, and DIY attitude. A lot of our bedrock technology is home-grown and written to solve our own unique Walmart-scale problems. One of the engineers on our team wrote an entire Clojure dialect (https://github.com/candid82/joker/), and scripts written in that language now do a lot of heavy lifting of our own infrastructure. - A good intuition for writing code that won't fall over under pressure and handles failure states well. We deploy daily and a null pointer might impact millions of requests in a few minutes. - An interest in doing DevOps-y stuff and a high expectation in good monitoring. We have full ownership of the life-cycle of our code and the servers it runs on. - The ability to think and work in functional languages (Clojure) - Experience writing distributed systems with a lot of message passing If this sounds interesting to you, please reach out to bcarrell@walmart.com and say hello.
In Ask HN: Who is hiring? (April 2019)
I've built a simple GraphQL server in Clojure using the Lacinia (https://github.com/walmartlabs/lacinia) library. It is about as nice as Apollo to be honest, but you would obviously need to know your way around Clojure. Lacinia tries to be feature complete (as defined by Apollo Server and GraphQL spec), but obviously does not support everything Apollo does (remote schemas and graphql endpoints for example). I have not tried any GraphQL server libraries in other languages, so I can't speak for people using C#, Java, or some other language. I think the tooling around GraphQL is quickly approaching a point where it is better to use GraphQL then REST for client facing services. The fact that you can more precisely define your data needs and don't have to fetch the world, or make multiple round trips, is a big win. The contract a GraphQL schem
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a provides both during development and runtime is also nice.
In gRPC-Web is going GA
Do you understand that he is talking about Lacinia, which is from WalMart? Do you feel that WalMart is esoteric? Do you wonder why WalMart has decided to commit to Clojure? A friend of mine offers the somewhat humorous summary of Clojure as "a library that makes concurrency easier in Java." And I suspect that is why so many large companies are moving towards it. These were companies that had a large number of Java programmers. Presumably the programmers often made mistakes regarding concurrency, and they were looking for a way to make it easier to manage concurrency. And so they switched to Clojure. Interop between Java and Clojure is seemless, so a lot of companies that are already using Java can add in Clojure painlessly. Actually, I should state that more strongly, Clojure removes some of the pain of dealing with concurrency. Lacinia i
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s new. The first public release was just 6 months ago: https://github.com/walmartlabs/lacinia/commits/master?after=... The fact that big companies like WalMart are committing to Clojure, and then releasing their libraries to the community, suggests that Clojure is going mainstream.
In A Case for Clojure and GraphQL: Replacing Django

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