I have watched the evolution of several software projects over the years. A common problem I have seen is how software which seemed to be on solid footing, easily became unmaintainable or destabilized because of poor coding practices. One of the earliest examples of my career I can remember is a C++ program supported by a team I was a member of. This program was the heart of a large application. The ability of this application to function well was critical to the success of the product. The application’s architecture and development approach over the years made it increasingly brittle. Developers were scared to change any code because there was not only a significant lack of proper tests in place, but the way in which the application was structured made it very hard to know fully what might break when changes were implemented. This also meant that trying to expand the feature set of the application was also very difficult, time consuming, and expensive. Developers were not thrilled to work on the application, and we even lost a good developer because of the unrealistic demands being asked of him.
Another project I worked on was developed by a single individual in isolation. That application was fairly advanced and complex in its ability to handle just about every unique use case a customer could come up with. The developer used acceptable design patterns and practices during its development. However, the resulting application turned out to be so complex that customers found it challenging to understand and use. Other developers had trouble making changes to the product because it was not designed in a way which was intuitive or well documented. While not everything must be intuitive, my experience has taught me there are common standards of designing things which makes it easier for individuals to come behind you and pick up where you left off. A software product can be complex but also be intuitive at the same time.
A few years back, I developed a security component for an application, which was designed to integrate Single Sign-On with corporate networks, thereby granting precise control over user interactions within our app. The simplicity and efficiency of this design were well-received by customers. However, a couple of years post-launch, I engaged in a detailed discussion with a colleague who had reservations about my design choices. He proposed an alternative approach, which, while not fundamentally altering the core functionality, differed in its logic and complexity. This situation illustrated the diverse perspectives in software design, where developers often have varied preferences and approaches.
Despite the success of the original design, evidenced by customer accolades for its ease of integration and clarity, and despite the existing workload of other projects, my colleague was inclined to overhaul the application with a design he deemed more logical but arguably more complex for end-users. Time and priorities never permitted his design to take hold and my code became the product standard for more than a decade.
Reflecting on this experience, I’ve come to appreciate the importance of a balanced approach in software development. It highlights the significance of embracing diverse perspectives during the development process, acknowledging that while personal preferences often influence design choices, a well-conceived design ultimately proves its worth. In the end, it’s the quality and effectiveness of a good design that stands the test of time and usage.
With those examples as the basis of my learnings, I would like to call out the following best practices for implementing maintainable software.
Best Practices
Clarity holds far more value for the long-term health of a software application than cleverness or complexity. While it’s possible to create products that are both clever and complex yet still comprehensible, developers often fall into the trap of prioritizing ingenuity over practicality, neglecting the needs of those who will maintain their work in the future.
It’s essential to remember that there’s an absolute certainty that others will need to support, maintain, extend, and enhance whatever you build — unless, of course, your code never makes it to a production environment. Consider how you want to be perceived by your peers: as a developer whose work is praised or as one whose projects are met with groans and complaints? Empathy for those who will follow in your footsteps is crucial. The quality of your software development has a significant impact on your professional reputation. Remember, there’s little honor in creating products that only you can manage. While this might offer short-term job security, it doesn’t contribute to a respected legacy.
A little extra effort along the way pays huge dividends down the road!
- Intuitive naming standards – I have found naming standards go a long ways when people have to maintain your code. Using non-intuitive variables, functions, and classes can add significantly to the complexity of your code.
- Review and refactor – As your code evolves, elements that initially made sense might not fit well within the scope of a larger application. Don’t hesitate to extensively revise or rework your code before its initial release. This process might demand considerable effort, but it can significantly enhance the final product. Often, taking a day or two to step back and then ‘rubber duck’ your code—explaining its workings to yourself or a colleague—proves invaluable in refining a robust design.
- Extensibility – Design your code to be extensible, anticipating future use cases that may not be immediately apparent. By implementing the necessary ‘plumbing’ with minimal initial effort, you can save significant time and resources in the long run.
- Mentor Friendly – Write your code with junior developers in mind, as they are frequently responsible for maintaining and enhancing existing applications. Craft your code to facilitate mentoring less experienced developers, enabling them to improve the application with minimal risk.
- Unit tests – If your application is not well documented or does not have clearly defined user requirements, unit tests can provide an extra safety net when others come behind. Even if they don’t know what the application is supposed to do, they know something is wrong if your tests are not passing after they make changes.
- Documentation – Documentation is crucial. Dedicate time to write comprehensive paragraphs that outline what the application accomplishes, its design principles, the rationale behind its design, and instructions for running it. This step is not just about creating a guide; it’s about providing context and understanding for anyone who interacts with your software in the future.
Summary
In summary, the lessons I’ve learned in software development boil down to a few essential points. Clarity in coding trumps complexity every time. It’s about making your work understandable and maintainable for others, not just showing off technical prowess. The way you write your code really matters to those who will update or fix it later – you want to be remembered as a developer who made their lives easier, not harder. And it’s about thinking long-term; building software that not only works well now but continues to do so in the future. Striking a balance between innovation and practicality is key. That’s the kind of approach that builds a solid reputation in the tech world.
