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You might not need Redis
Redis is arguably the most well regarded tech of all. But many times you do not need Redis. Here are 3 examples from my last 3 jobs.
While there are certainly complexities in regard to how format the ads to fit the various social network's API contracts, get access etc., this was not a high load scenario like at Tantan. The first usage was to cache the result of an external API call to lookup geolocation of users, so that the service in question could process location requests quicker, and also run cheaper. If you nod in agreement, or are at least open for more on the same topic, there's this quite well known talk by Dan McKinley I recommend to check out: Choose Boring Technology By pure coincidence it's also about Redis...
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