Writing Maintainable Code for Fast-Moving Projects: Our Approach

In fast-moving projects, speed is everything.

Whether you're validating an MVP, scaling a successful product, or racing to meet market demands, the temptation is always there: "Ship now, fix later."

But later rarely comes. A common misconception in the software industry is that moving fast is doing everything in a rush.

At Programium, we believe that speed and maintainability aren't mutually exclusive.

In fact, they go hand-in-hand.

In this post, we’ll share how we balance delivery velocity with sustainable code quality, and why this balance is key to long-term success.

1. Maintainability as a Design Principle

Before we write a single line of code, we ask:

"How easy should it be to change this in six months?"

Maintainable code is:

• Easy to read and understand.
• Predictable in behaviour.
• Modular, so changes are localised.
• Well-documented, with clear intent.

We treat maintainability as an investment, not an afterthought.
Every decision from project structure to naming conventions is guided by this principle.

2. Clean Code Matters

Clean code might feel "slower" at first, but it’s actually the opposite over time.

Our practices include:

• Descriptive naming: So code reads like a story.
• Small functions: Each function does one thing well.
• Consistent formatting: Tools like Prettier and Checkstyle enforce clarity.
• Eliminating dead code: If it's not used, it’s gone.

💡 Tip: We treat our codebase like a garden, continuous small cleanups prevent wild overgrowth.

3. Automated Testing: as a Safety Net

We rarely compromise on automated testing.

Why? Because testing gives you the confidence to move fast without fear of breaking things, untested code increases manual effort of quality validation and raises the need of manual regression testing which in most cases is counter intuitive to efficiency and speed.

Our typical setup includes:

• Unit tests for fast feedback.
• Integration tests for system behaviour.
• End-to-end tests for critical user flows.

This layered approach means we catch issues early, when they’re cheap and easy to fix.

"If tests are green you should be good to go, if they are not you better fix them first."

4. Using The Right Architecture

Even in MVPs, we apply architecture thinking:

• Domain-Driven Design (where applicable) to reflect business logic cleanly.
• Separation of concerns to avoid tangled systems.
• Architecture Decision Records (ADRs) to document why decisions were made.

We don’t "over-engineer", but we leave clear paths for future growth.

Similar to the second system effect we try to maintain a balance between keeping things simple and making design decisions that will benefit the project.

5. All Code Is Reviewed

In fast-paced projects, code reviews can feel like bottlenecks.
We make them accelerators instead.

Our approach:

• Mandatory peer reviews, which are used to to mentor each other not just gatekeeping.
• Focus on high-impact feedback (readability, structure, logic).
• Automated pull request decoration that focuses on the basics (e.g. linting, test coverage, sonar scans, vulnerability scans) so reviews focus on real improvements of the business logic and code quality.

This aims to keep our velocity high while maintaining quality.

Conclusion: Sustainable Speed Wins

Our experience taught us that fast growth doesn’t have to mean technical chaos.

By embedding maintainability into our processes, from architecture decisions to daily coding habits we help our clients scale confidently, knowing their software can evolve as fast as their business does.

If you’re building fast and want to avoid growing pains later, let’s talk.