IBM Full Stack Software Developer case studies
IBM Full Stack Software Developer · Put your knowledge to work in context.
The IBM Full Stack Software Developer credential is a professional certification for developers who build and deploy complete web applications, from browser interfaces through server logic to cloud-hosted runtime. It suits career changers entering software development, junior developers formalizing on-the-job skills, and experienced engineers who want documented evidence of end-to-end capability. The IBM Full Stack Software Developer case studies are 5 cases and about 4,485 words.
1A Patch Release That Broke Three Consumers
A team maintains an internal Node.js library, acct-utils , used by nine services. Version 1.4.4 was published as a patch release and contained one behavioural change: the default page size returned by paginate() dropped from 50 to 25, and results are now sorted by createdAt instead of id .
885 words, about 4 min2Input Latency and a Draft That Saves to the Wrong Claim
A React 18 internal claims dashboard renders a 38-field controlled form plus a SummaryPanel that recalculates totals. Interaction to Next Paint for typing averages 780 ms on a Moto G Power (2021) and about 90 ms on a developer's MacBook.
887 words, about 4 min3A Slow Express API and Intermittent 502s
A Node.js 20 / Express 4 service, orders-api , runs six containers behind a load balancer, each with a pg pool of max: 20 . PostgreSQL is configured with max connections = 200 .
937 words, about 5 min4A 1.9 GB Image and a Probe That Kills Itself
A team containerises a Node.js 20 API. The Dockerfile is FROM node:20 , WORKDIR /app , COPY .
865 words, about 4 min5A Pipeline Nobody Trusts
A 40-engineer organisation merges about 60 pull requests a week into main . A single GitHub Actions workflow runs lint and 1,400 unit tests (22 minutes wall clock), builds an image tagged both latest and $GITHUB SHA , then runs kubectl set image against the production Deployment.
911 words, about 5 min