The caricature and the reality
The story is "startups = fast learning and chaos, big companies = stability and boredom." Reality is a spectrum, and there are great and terrible versions of both. A well-run small company can be more structured than a badly-run large one. Evaluate the specific team and role, not the category.
What a smaller or newer company tends to offer
Broader responsibility sooner (you touch more of the product), visible impact, direct access to senior people, and fast iteration. The costs: less formal training and mentorship, thinner process (which you may have to build), less job security, more schedule pressure at crunch times, and compensation that may lean on equity you should value conservatively.
What a larger, established company tends to offer
Structured onboarding and training, a defined role with clear expectations, established mentors, better benefits and job stability, brand recognition on your resume, and the chance to see how mature processes work. The costs: a narrower slice of the work, slower decisions, more layers between you and impact, and the risk of being a small cog.
For a first job, either can be right
A structured first job teaches you professional norms and gives you mentorship when you most need it. A small-company first job teaches you breadth and self-direction. What matters more than size: will you have a manager who invests in you, real work you can point to in two years, and colleagues you can learn from?
Questions that reveal which you are looking at
Ask: what does a first project look like and who owns it? How is feedback given, and how often? Who would I learn from? What is the training in the first 90 days? How is the company funded and what is the runway (for a startup)? How long do people stay, and where do they go next? Vague or evasive answers are data.
Get a second opinion
A career coach will pressure-test your read on a specific offer, and current employees (ask to talk to a couple, especially recent hires) will tell you what the day-to-day is actually like. The offer letter tells you the comp; the conversations tell you the job.
Fictional information
UW–Porter Falls is a work of parody. Every office, person, building, phone number and statistic on this page is invented; nothing here describes a real institution or a service you can actually contact.