I work for a startup, also known as a growth company. This means employment is very unstable, because the startup might run out of money basically at any point. On the flip side, a startup is a super flexible working environment where each employee is both given freedom but also assumed to take responsibility for their work. The main responsibility of a growth hacker in a startup is to do whatever it takes to take the company to the next level with regard to growth. Typically growth is either measured in euros or in number of users, depending on the type of company. This requires understanding of marketing (business), customer experience design and research, and basics of behavioral psychology, as well as technical and quantitative analysis skills. Each growth hacker has their own mix of skills and since the whole job is quite new, each company recruits for their own specific needs.
An average day consists of talking with other people in the company, such as the founder / CEO of the startup, the sales director, head of product; as well as talking to customers, both existing and potential. Additionally, a lot of time is spent in front of the computer, analyzing different data sources about product usage and marketing campaigns. All of this is done to gain an understanding of the needs of both the customers and the company and to form hypotheses of how the growth of the company could be taken to a new level. Then, using this understanding, marketing interventions are designed, executed and their results analyzed to see if the hypotheses were correct or not. Mostly the results are incrementally better or worse, but sometimes real breakthroughs (or "growth hacks") are found and this is why growth hackers are employed in the first place.
Autonomy, challenges of learning about new marketing and analysis methods and tools, and the appreciation of colleagues when I find new avenues of growth.
A lot of sitting in front of the computer causing a need for consulting the physiotherapist every once in a while, and a lot of dead-end experiments that test the self-confidence when nothing seems to be working.
Perhaps less glamorous, more difficult to find breakthroughs, but also very rewarding when the breakthroughs sometimes are found through hard work.