Starting a tech company is a wild ride, and those first 100 days? They’re everything. Intense. Uncertain. Incredibly exciting. You’re not just building a product, you’re laying the groundwork for your company’s future: its people, its purpose, and how it will grow.

If you're stepping into this world as a first-time founder, here's a practical guide to help you steer through those critical first few months.

Days 1 to 30: start with the problem.

Before jumping into code, take a step back. Is the problem you're solving actually a problem? And more importantly: do people care enough about it to pay for a fix?

This phase is all about listening. Talk to potential users. Ask questions. Challenge your assumptions.

Questions to explore:

  • What’s the core problem we’re trying to solve?
  • Who feels this problem the most?
  • How are they managing it today?

Use tools like interviews, quick surveys, and small-scale experiments to test your idea. Skipping this part is why a lot of startups stumble early.

Days 15 to 45: shape your MVP.

Once you've confirmed there's a real need, it's time to outline your Minimum Viable Product (MVP), the scrappy first version of your product that solves the core pain point without all the bells and whistles.

Remember, your MVP isn’t meant to be flawless. It’s meant to be functional and testable. This is where teaming up with an experienced product development crew can really pay off—they can help you turn your vision into something tangible, fast.

During this stretch:

  • Prioritize the must-have features
  • Lay out a rough roadmap (3 to 6 months is a good start)
  • Begin sketching wireframes or mapping out early designs

Days 30 to 60: assemble the right team.

You’re not in this alone - nor should you be. Whether you’re on the hunt for a technical co-founder, hiring contractors, or partnering with a dev team, surround yourself with people who share your mission and can move quickly.

Key early roles might include:

  • A product lead or CTO-type figure
  • A full-stack developer (or a development partner)
  • A UI/UX designer
  • Possibly a growth or marketing pro, depending on where you are

Bringing in outside help can be a smart way to keep momentum going without burning through your runway.

Days 60 to 90: launch and learn.

With your MVP in hand, it’s time to put it out into the world, carefully. Start with a soft launch to a small group of users. Watch how they interact. Ask for feedback. Be ready to adapt.

Track things like:

  • Signups and usage
  • What features are clicking (or flopping)
  • How people are responding, both quantitatively and qualitatively

Don’t aim for perfection here. You’re still learning. The goal isn’t just to build something people like: it’s to build something they can’t live without.

Days 90 - 100: plant the seeds for growth.

If your MVP is landing well, you’re ready to think about what’s next. That means:

  • Mapping out your go-to-market plan
  • Laying the foundation for SEO, content, and maybe paid marketing
  • Starting early conversations about fundraising (if that’s part of your path)
  • Documenting what you’ve learned so far

Also, now’s a good time to get basic analytics in place and define what success looks like for the next phase of your journey.

Your first 100 days as a tech founder aren't just about chasing growth: they're about getting clear, moving fast, and staying close to your users. Learn quickly. Build Smart. Surround yourself with a team that believes in your vision. At CodigoDelSur, we’ve helped hundreds of founders bring their ideas to life, from napkin sketches to launched products. Whenever you're ready to take your first steps into the startup world, we're here to help.