Anthony Marcar - Clojure At Scale @WalmartLabs

It was mentioned in passing at Clojure/West a few months ago. I wish I remembered more...this video might have more details: [VIDEO]

WalmartLabs - Clojure Developer. | SF | Remote (US Timezones) | 1HB VISA You can work on Clojure at quite a few companies, but rarely can you impact millions of people at such a personal level. Walmart's mobile apps are highly rated and the services we write to support them are the base of that success. We started from a small company acquisition with a single product. Today, we power a platform and a suite of products running on mobile devices and systems in retail stores. We're still a small, flat team of engineers. We work with our own tools and make our own build-or-borrow decisions. Our culture is a healthy mix of sharing and pushing each other to be better at our craft. For example, we use pull requests & code reviews liberally. We make refactoring time. We deploy often, with a single line of code run from a REPL. Engineers on our team are challenged to work through our full software stack and be part of our product management. We believe that people are more engaged, fulfilled and happy when they feel responsible for actually shipping their work. The environment at WalmartLabs balances moving fast and breaking shit, with the knowledge that we could break shit for 150+ million people every week. It's a tough balance but we've found the payoff to be worth the challenge and responsibility. Some aspects of our work that are important to us: - high performance distributed systems - robust & well-factored codebases - simple & fast deployments - automating the hell out of ope

WalmartLabs - Clojure Developer. | SF | Remote (US Timezones) | H1B VISA You can work on Clojure at quite a few companies, but rarely can you impact millions of people at such a personal level. Walmart's mobile apps are highly rated and the services we write to support them are the base of that success. We started from a small company acquisition with a single product. Today, we power a platform and a suite of products running on mobile devices and systems in retail stores. We're still a small, flat team of engineers. We work with our own tools and make our own build-or-borrow decisions. Our culture is a healthy mix of sharing and pushing each other to be better at our craft. For example, we use pull requests & code reviews liberally. We make refactoring time. We deploy often, with a single line of code run from a REPL. Engineers on our team are challenged to work through our full software stack and be part of our product management. We believe that people are more engaged, fulfilled and happy when they feel responsible for actually shipping their work. The environment at WalmartLabs balances moving fast and breaking shit, with the knowledge that we could break shit for 150+ million people every week. It's a tough balance but we've found the payoff to be worth the challenge and responsibility. Some aspects of our work that are important to us: - high performance distributed systems - robust & well-factored codebases - simple & fast deployments - automating the hell out of ope

WalmartLabs - Clojure Developer. | SF | Remote (US Timezones) | H1B VISA You can work on Clojure at quite a few companies, but rarely can you impact millions of people at such a personal level. We're a small, flat team of engineers building mission critical applications for Walmart Grocery. We work with our own tools and make our own build-or-borrow decisions. Our culture is a healthy mix of sharing and pushing each other to be better at our craft. We use pull requests & code reviews liberally. We make refactoring time. We deploy often, with a single line of code run from a REPL. Engineers on our team are challenged to work through our full software stack and be part of our product management. We believe that people are more engaged, fulfilled and happy when they feel responsible for actually shipping their work. Some aspects of our work that are important to us: - high performance distributed systems - robust & well-factored codebases - simple & fast deployments - automating the hell out of operations - thorough system test coverage - managing our own development process and work backlog - pair programming when it makes sense (locally and remotely) - contributing back to the clojure & open source community What we do: - write all our production systems & tools in Clojure - create and orchestrate massive distributed systems - spin up web services for handling large volumes of data For a glimpse behind the scenes, check out a talk we gave at Clojure/West last year. [VIDEO] . D

WalmartLabs - Clojure Developer. | SF | Remote (US Timezones) | H1B VISA You can work on Clojure at quite a few companies, but rarely can you impact millions of people at such a personal level. We're a small, flat team of engineers building mission critical applications for Walmart Grocery. We work with our own tools and make our own build-or-borrow decisions. Our culture is a healthy mix of sharing and pushing each other to be better at our craft. We use pull requests & code reviews liberally. We make refactoring time. We deploy often, with a single line of code run from a REPL. Engineers on our team are challenged to work through our full software stack and be part of our product management. We believe that people are more engaged, fulfilled and happy when they feel responsible for actually shipping their work. Some aspects of our work that are important to us: - high performance distributed systems - robust & well-factored codebases - simple & fast deployments - automating the hell out of operations - thorough system test coverage - managing our own development process and work backlog - pair programming when it makes sense (locally and remotely) - contributing back to the clojure & open source community What we do: - write all our production systems & tools in Clojure - create and orchestrate massive distributed systems - spin up web services for handling large volumes of data For a glimpse behind the scenes, check out a talk we gave at Clojure/West last year. [VIDEO] . D

WalmartLabs - Clojure Developer. | SF | Remote (US Timezones) | H1B VISA You can work on Clojure at quite a few companies, but rarely can you impact millions of people at such a personal level. We're a small, flat team of engineers building mission critical applications for Walmart. We work with our own tools and make our own build-or-borrow decisions. Our culture is a healthy mix of sharing and pushing each other to be better at our craft. We use pull requests & code reviews liberally. We make refactoring time. We deploy often, with a single line of code run from a REPL. Engineers on our team are challenged to work through our full software stack and be part of our product management. We believe that people are more engaged, fulfilled and happy when they feel responsible for actually shipping their work. Some aspects of our work that are important to us: - high performance distributed systems - robust & well-factored codebases - simple & fast deployments - automating the hell out of operations - thorough system test coverage - managing our own development process and work backlog - pair programming when it makes sense (locally and remotely) - contributing back to the clojure & open source community What we do: - write all our production systems & tools in Clojure - create and orchestrate massive distributed systems - spin up web services for handling large volumes of data For a glimpse behind the scenes, check out a talk we gave at Clojure/West. [VIDEO] . Does this sound lik

Amazon was specifically using Clojure for the online checkout system, and the team bragged a few years ago how the system survived black friday without a hickup. Walmart is using Clojure for their checkouts as well [VIDEO] Boeing is using it in the onboard control systems for the 737 Max [LINK] It's not some obscure microservice that some intern wrote over the weekend, these companies are using the language for critical applications, and the feedback from these companies is positive.

That's not empirical evidence that formal methods are more effective than other approaches. It just shows that the culture at these companies is conductive to using them. Walmart [VIDEO] and Boeing [LINK] etc use different approaches. :)