At $lastJob$ we had a home-grown solution. My contribution was a simple expression language that created an algebra of flags. Things like `(A | B) && C` or `from: 2027-01-01 && to: 2027-12-31` and so forth. The idea was to enable PMs to do a lot of the feature management directly, and then to use the patterns that arise organically to discover what we would need when we were ready to pay for a SaaS solution.

If you have any questions about what this unlocked for us... Or anything else... "My obfuscated email is in my bio." Happy to help anyone trying to make shipping easier for teams, I self-identify as a toolsmith.