To be entirely honest at small startups you don't always have a big team, you don't always have a lot of resources, you simply have a few people who get to know the product really really well and figure out the best ways for user acquisition. What you really need is an awesome marketer who can craft an incredible content strategy and get your site in front of people, you need to then pair this person with a growth developer who can focus on helping the marketer with ab testing, site optimization things and marketing initiatives. Each role plays a separate but important part. Would love to know more about what you're trying to do and your current market. I'm a big fan of MOZ products and optimizely. Let me know if you want to talk strategy