At my previous company I created a buildpack that allowed our proprietary runtime to run on Cloud Foundry (an open source Enterprise PaaS like Heroku). I built the first version in my spare time in a couple of evenings. It made our software and company compatible with the platforms of major players in this space, including SAP, IBM, GE and Siemens. The compatibility made our tech and our company much more interesting to these companies. In fact, the company was acquired by Siemens last year for $730M.

If I would not have built it, another engineer in the company would have done it a couple of months later while explicitly being assigned the task. I proved that it worked within a couple of days. The code powers tens of thousands of deployments today and is also the basis for running on Docker & Kubernetes.