Ameen seems to have covered the accessibility side of things well, so I'll talk a bit about the ethical side of "Responsible".
In designing software, there are a few things we owe our users:
- privacy
- safety
- compassion
Data & Privacy
Beyond the legal ramifications of GDPR/CCPA, we need to be cognizant of the data we're collecting and why we're collecting it. Facebook got into hot water by selling user data to Cambridge Analytica, and again for allowing companies to target only white men for job postings.
Be aware of the data you're collecting, what it's used for, and who it's benefiting. Stand up to your product owners if you see something untoward - no one else is going to stand up for the users.
Safety
Can the information we're collecting cause a user harm? Is the app itself detrimental to the user's physical or mental health? We know that social media companies have gotten negative publicity due to the number of addicted users they have - but that addiction was the app's intent.
As UX designers, it's our job to notice when our goals are damaging, either intentionally or not, and call them out.
Compassion
Using respectful terminology, actively empathizing with users, and making sure that all users voices are heard covers the Compassion side.
We know in the medical industry in the United States, poorly designed algorithms often lead to people of color having detrimental experiences, such as when their skin color being under studied and thus under represented, resulting in misdiagnoses. If anyone involved in that team had taken a moment to think about who their users actually are, and try to think of their experiences, this might not be the case.
...and more
Broadly, outside of our users, we should consider the impacts our designs have to the world at large, such as:
environmental impact
- Is there a way to minimize the number of API calls to reduce the electrical costs?
- Rather than using a brand new device, can we make our software compatible with older phones, creating less waste?
systemic impact
- What other systems are at play? Does our product create a bad precedent that will be followed by others?
- Are there things we're not taking into consideration at a higher or lower scale? How can we find out about them?
For hard takes on design & ethics, I'd recommend the following books:
- Ruined by Design, by Mike Monteiro
- Tragic Design: The Impact of Bad Product Design and How to Fix It, by Cynthia Savard Saucier and Jonathan Shariat
- Mismatch: How Inclusion Shapes Design, by Kat Holmes