Pros
Liven trusts it's employees a lot. This means you have the flexibility to push yourself as much as you want while having the backing of your peers and the supervision of experienced staff. If there are parts of the business that you want to learn more about but haven't had the opportunity in the past, Liven is the perfect place to upskill. If you're a dev and want to learn sales or vice versa, Liven is very accomodating.
Cons
It can be too flexible. Sometimes you don't know if you're on the right track unless you explicitly ask (which takes a lot of balls) The pay isn't great. That's the price you pay for opportunity to grow. I'd still take Liven over Deloitte with an extra 30k, any day of the week (n.b. Liven does pay more than Deloitte pays graduates)