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Ask HN: Any active COBOL devs here? What are you working on?

234 points _false | 2 comments | 18 Jul 25 13:05 UTC | HN request time: 0.001s | source

COBOL legacy systems in finance and government are somewhat of a meme. However, I've never actually met a single person who's day job is to maintain one. I'd be curious to learn what systems are you working on?
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zeeframe ◴[18 Jul 25 13:45 UTC] No.44604586[source]▶
I’m not a COBOL dev but I work with mainframes(z/OS). Most COBOL applications I’ve seen have been banking and insurance related with few exceptions. Most of them either run as a series of batch jobs or via transaction managers like IMS and CICS. Backends are usually sequential files(we call them datasets),DB2,VSAM(Virtual Storage Access Method) or DL/1(hierarchical DB that’s part of IMS). Quite a few places I’ve seen have run IBM MQ as well.

If changes are made to these systems it’s often due to changes in regulation or driven by changes in the business(new financial products being offered etc.

Off-topic: I’ve seen quite a few mainframe related posts on HN fly by over the years. I’ve been meaning to create an account and participate but I’ve only gotten around to it just now.

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znpy ◴[18 Jul 25 14:57 UTC] No.44605362[source]▶
Dumb question: mainframes and z/OS look interesting, how does one get started with learning about those systems and those environments ?
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1. zeeframe ◴[18 Jul 25 15:23 UTC] No.44605726[source]▶
Not a dumb question at all! In Europe I’ve seen a few training programs held by companies looking to get new talent in to learn from the older techs. Browse around and see if any companies around you have something like that.

There are some free resources available that will allow you to get training but I haven’t tried them myself. IBM Z Xplore is worth a look as an example: https://www.ibm.com/products/z/resources/zxplore

I hope you find a way in, more mainframe developers and sysadmins(often called systemsprogrammers in the mainframe niche) are always needed.

Edit*: Spelling and grammar

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2. jmbwell ◴[18 Jul 25 18:29 UTC] No.44608199[source]▶
I’ve run through a bunch of ZXplore and it’s more fun than I expected.

They have it hooked in to VS Code now. It’s weirdly modern. And you get to play on a real z machine.

Recommendable summer/holiday tinkering project. It’s amazing how much and yet how little has changed in computing and transaction processing.