Codetown ::: a software developer's community
August 23, 2018 from 6pm to 8pm – Starter Studio This month we welcome Edson Yanaga as our speaker. Edson will give a talk he calls Revisiting Effective Java. You can get there at 6 for pizza and the presentation will begin at 7. Revisi… Organized by Michael Levin | Type: meeting
November 15, 2018 from 6pm to 8pm – Starter Studio Howdy Java Enthusiasts! We have a great presentation coming up next Thursday, 11/15. Hope you can make it. Be sure to RSVP! Docker and Gradle Docker combined with some modest JVM t… Organized by Michael Levin | Type: meeting
January 22, 2019 from 6pm to 8pm – Starter Studio Howdy Java Enthusiasts! We have a great presentation coming up. Hope you can make it. Be sure to RSVP! You choose...we're making arrangements right now: "Reactive for the Impatient" (a survey… Organized by Michael Levin | Type: jug
March 7, 2019 from 6pm to 8pm – Starter Studio Hello Java Enthusiasts! You're in for a treat! We have a great presentation coming up, Here are the details. Programming Platform Growth: Table Stakes or Deal Makes? This talk dr… Organized by Michael Levin | Type: meetup
June 21, 2019 from 6pm to 8pm – Starter Studio Jim Clarke will give a talk on how to succeed at this test. He was one of the authors! Organized by Michael Levin | Type: presentation
July 25, 2019 from 6pm to 8pm – Starter Studio Join us for a Reactive Spring talk featuring Miguel Mendez. Miguel Mendez is a software engineer from Orlando Florida. He currently works for FlexEngage as a Lead Developer. With more than 20 y… Organized by Michael Levin | Type: ojug, meetup
August 22, 2019 from 6pm to 8pm – Starter Studio Join us for a Git presentation featuring RustyRusty Phillips has been a polyglot developer for over 20 years (and Java to some degree during all of that time), and has spent that time special… Organized by Michael Levin | Type: meetup
January 23, 2020 from 6pm to 8pm – Starter Studio Join us for a talk featuring Richard Thibault Richard Thibault is a full-stack web and mobile developer with over 25 years of experience in the software industry. He is currently focused on Java a… Organized by Michael Levin | Type: meetup
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Codetown is a social network. It's got blogs, forums, groups, personal pages and more! You might think of Codetown as a funky camper van with lots of compartments for your stuff and a great multimedia system, too! Best of all, Codetown has room for all of your friends.
Created by Michael Levin Dec 18, 2008 at 6:56pm. Last updated by Michael Levin May 4, 2018.
Check out the Codetown Jobs group.

Pinterest Engineering cut Apache Spark out-of-memory failures by 96% using improved observability, configuration tuning, and automatic memory retries. Staged rollout, dashboards, and proactive memory adjustments stabilized data pipelines, reduced manual intervention, and lowered operational overhead across tens of thousands of daily jobs.
By Leela Kumili
Franka Passing discusses the architectural shift of Duolingo’s 500+ backend services to Kubernetes. She explains the move toward GitOps with Argo CD, the transition to IPv6-only pods, and the "cellular architecture" used to isolate environments. She shares "reports from the trenches" on managing developer trust, navigating AWS rate limits, and productionizing early adopter services.
By Franka Passing
How can you focus in a sea of results from a large regression test suite? This article describes a stochastic approach that relies on some degree of redundancy in your CI regression test set. This approach does not guarantee you will catch every bug every time, but it gives you your best bet of not missing the subtle signatures of all the bugs uncovered by your CI regression test suite runs.
By James Bornefelt WestfallIn this episode, Thomas Betts and Adi Polak talk about the need for context engineering when interacting with LLMs and designing agentic systems. Prompt engineering techniques work with a stateless approach, while context engineering allows AI systems to be stateful.
By Adi Polak
A 600-run benchmark by Ruby committer Yusuke Endoh tested Claude Code across 13 languages, implementing a simplified Git. Ruby, Python, and JavaScript were the fastest and cheapest, at $0.36- $0.39 per run. Statistically typed languages cost 1.4-2.6x more. Adding type checkers to dynamic languages imposed 1.6-3.2x slowdowns. Full dataset available on GitHub.
By Steef-Jan Wiggers
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