Embracing the 3-Month Rule: A Pragmatic Approach to Scalable Development
In the world of startups, success often hinges on rapid experimentation and learning. A well-known piece of advice from entrepreneur Paul Graham—”Do things that don’t scale”—is broadly accepted but rarely applied in technical settings. As I developed my AI podcast platform over the past eight months, I found it essential to devise a practical framework for implementing this philosophy in development. My solution? The 3-month rule.
The premise is straightforward: every unscalable technique is given a lifespan of three months. During this period, it must either demonstrate its value and be refined into a robust solution or be discarded.
The Reality of startup Development
Engineers are typically trained to design solutions intended for scalability from the outset—whether that’s through modern architectural paradigms like microservices or distributed systems. However, this “big company” mindset can lead to unnecessary complexity in a startup environment. Often, focusing on scalability is akin to procrastination, as it directs resources towards theoretical users and problems that may never arise. By adhering to my 3-month rule, I focus on developing straightforward, albeit imperfect, code that enables prompt deployment and provides crucial learning opportunities about user needs.
Practical Infrastructure Choices That Yield Insights
Let’s explore some of my current infrastructure decisions that may seem unconventional, but have proven beneficial:
1. Consolidated Operations on a Single Virtual Machine
Currently, my web server, database, background jobs, and cache all operate on a single $40/month virtual machine. This setup is characterized by a lack of redundancy and manual backups to my local machine.
You might question the wisdom of this approach, but it offers unparalleled insight into my actual resource requirements. After two months, I’ve learned that my platform only spikes at about 4GB of RAM usage—information that would have been elusive with more complex planning. Each time the system crashes (which has happened twice), I gather valuable data about failure points, which are often unexpected.
2. Hardcoded Configuration Values
I utilize hardcoded constants throughout my codebase for configurations, removing the need for external files or environment variables:
python
PRICE_TIER_1 = 9.99
PRICE_TIER_2 = 19.99
MAX_USERS = 100
AI_MODEL = "gpt-4"
While this may seem outdated, it provides a remarkable level of control. Each change
