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Anthony Marcar - Clojure At Scale @WalmartLabs

ClojureTVCited 8× on HN, 2015–2018
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talk · intermediate · 2015–2018 on HN

Anthony Marcar describes lessons from three years of using Clojure at WalmartLabs, including scaling a team and a large multi-project codebase in an enterprise setting.

HN cites it as evidence of Clojure running real large-scale production systems at Walmart and as a behind-the-scenes talk from that team.

8 comments from Hacker News

@yogthos2018-02 · in “A Programmable Programming Language”

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 ▶ this video and Boeing link etc use different approaches. :)

@yogthos2017-10 · in “Why I'm Productive in Clojure (2013)”

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 ▶ this 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.

@mfoster2016-11 · in “Ask HN: Who is hiring? (November 2016)”

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. ▶ this video . Does this sound lik

@mfoster2016-05 · in “Ask HN: Who is hiring? (May 2016)”

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. ▶ this video . D

@mfoster2016-04 · in “Ask HN: Who is hiring? (April 2016)”

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. ▶ this video . D