When we talk to clients about security at Manao Software, one thing is always clear: threats don’t wait. They evolve daily, and if your software isn’t built with security in mind from day one, you’re already on the back foot.
I’ve seen many teams make the same mistake by treating software security as an afterthought, something to fix right before launch. In reality, every developer, whether junior or senior, has a role to play in keeping systems safe. That’s why I want to share these 10 practical best practices we apply in our projects. They are shaped by real-world work, software testing, and the findings from pentesting engagements we’ve run.
At Manao Software, we take a different approach from the beginning. We include clients early, using Agile methods and a transparent process, so security is not hidden in the background. It becomes part of every sprint, every demo, and every decision. This way, our clients don’t have to wait in the dark for answers.
1. Use Least Privilege in Software Development
Too often, we see apps connecting to databases with full admin rights when all they need is simple read and write access. This is like giving every employee the keys to the whole office when they only need access to one room. By applying the principle of least privilege, you reduce the damage if an account or service is compromised.
2. Secure Authentication and Authorization
Passwords remain one of the weakest links, and attackers know it. That’s why strong authentication is non-negotiable. Always enforce multi-factor authentication (MFA) for sensitive systems. MFA is one of the simplest and most effective ways to block unauthorized access, even if a password is compromised.
Alongside MFA, make sure passwords are stored securely using modern hashing algorithms such as bcrypt or Argon2. For authorization, don’t reinvent the wheel. Stick to proven frameworks that enforce RBAC (role-based access control) or ABAC (attribute-based access control). Together, these measures significantly reduce the risk of breaches caused by weak or stolen credentials.
3. Why Encryption Matters in Software Security
Data is the crown jewel. Whether it is customer information or internal business data, it must be protected in transit, in process, and at rest. We enforce TLS 1.2 or higher for communication and AES-256 for storage. Just as important, keys must be managed properly. There have been many industry breaches caused by developers hard-coding encryption keys in public repositories, exposing sensitive data to attackers. It’s a reminder that convenience should never come at the cost of security.
4. Input Validation and Sanitization
This one sounds basic, but it is still one of the top causes of breaches we see. Applications that don’t sanitize input leave doors wide open for SQL injection or cross-site scripting. During our software testing, we often flag unvalidated form inputs. Developers should always use parameterized queries, sanitize outputs, and validate everything on the server side. Trust nothing from the client.
5. Keep Dependencies Updated
A secure system can still fall apart if one library is outdated. I’ve worked on projects where legacy components hadn’t been updated in years, and they were full of known vulnerabilities. Tools like Dependabot or Snyk make it easy to spot risks, but the real discipline is in applying updates quickly, not someday when there’s more time. Attackers move faster than your backlog.
6. Manage Sessions Securely
Sessions are another overlooked area. A poorly managed session can be stolen and reused by attackers. We always push for short-lived, HTTP-only, secure cookies with SameSite set. We also recommend rotating tokens after login or privilege changes. Small details like these prevent session hijacking.
7. Defend Against Injection Attacks
Injection is not only about XSS (Cross-Site Scripting) and SQL injection. XSS is one of the most common vulnerabilities in modern applications, consistently listed in the OWASP Top 10, and SQL injection continues to be a critical risk for databases. Beyond these, we’ve also uncovered LDAP injection, XML injection, and command injection during pentests. These are not theoretical risks. They can give attackers full control of your systems.
To defend against them, avoid building queries with string concatenation. Use ORM frameworks correctly, rely on parameterized queries, and stick to secure defaults provided by your frameworks and libraries.
8. Logging and Monitoring for Security
One of the most frustrating things in incident response is when logs don’t exist, or worse, when they don’t capture what is important. We advise clients to log events like failed logins, privilege changes, or unusual API calls. Just as important, use monitoring tools that alert you in real time. Logging without monitoring is like installing a security camera and never watching the footage.
9. Code Reviews, Software Testing, and Pentesting
We tell our clients that security is a team effort. No single developer can catch everything. That’s why we do peer reviews, integrate security checks into software testing, and schedule pentesting to simulate real-world attacks. Each method catches different types of issues. Together, they build confidence in the system before it ever goes live.
And because of our Danish-inspired approach, we don’t stop at simply delivering a working product. We make sure it truly holds up under scrutiny. Form and function go hand in hand, and delivering just enough isn’t enough. We return to our clients with solutions that balance quality, usability, and long-term resilience.
10. Build a Security-First Culture
Finally, security isn’t just about tools and practices. It is about people. At Manao, we encourage developers to stay up to date with OWASP, take part in workshops, and keep security in mind during daily standups. When security is part of the culture, it doesn’t slow you down. It becomes second nature, just like writing clean code.
A Global Example of Software Security Done Right
Think of Apple’s Face ID technology. It is a feature that millions use daily, but behind it sits years of investment in software security and testing. Apple built it with strong encryption, secure enclave storage, and rigorous pentesting to make sure it could not be tricked by simple hacks.
What makes this a success case is not only the technology but the mindset. Security was built in from the start, not added later. The system balances convenience and safety, showing that strong software security practices can also improve user trust and product adoption.
This is the same mindset we bring at Manao Software: building secure, functional, and user-focused systems from the very beginning.
In over 18 years of building software, I’ve learned one truth: security is never finished. It isn’t a feature you check off a list. It is a mindset you carry through the entire lifecycle of development.
At Manao Software, we don’t just write code. We build systems that last. We include our clients early, work with Agile and transparent processes, and never leave them waiting for answers. Inspired by a Danish way of thinking, we believe software must not only look good but also perform reliably. For us, delivering isn’t enough. It’s about delivering real value back to the customer.
That’s why we combine secure coding with software testing and pentesting to uncover weaknesses before attackers do. These best practices are the same ones we apply every day, because we know that small habits lead to big protection.
If you’d like to discuss how to make your applications more secure, we’d be glad to share more of our experience.
Contact us to start the conversation.
Written by: Tapanee J. | Marketing Manager
