New platform engineer, will leading the testing of infra and internal services pigeonhole me into SDET? Any general advice for my situation?
Is Your New Role Just a Fancy Tester’s Title?
You’ve landed a role as a platform engineer – congratulations! It’s a fantastic opportunity to shape how teams build and deploy software. But the job description throws you a curveball: a significant portion of your time will be dedicated to testing infrastructure and internal services. Suddenly, the question arises: am I just a fancy SDET (Site Reliability Test Engineer)? And if so, what should I do about it? This isn’t a simple “yes” or “no” answer. It’s a critical moment to understand the expectations and, more importantly, to define your own trajectory within the role. Let's cut through the confusion.
Understanding the Scope: Infrastructure Testing Isn’t *Always* SDET
The initial instinct is often to view infrastructure testing as simply a more technical form of testing, and therefore, a stepping stone to an SDET role. And to a degree, it’s true. SDETs *do* focus intensely on automated testing, particularly around reliability, performance, and security of systems. However, a platform engineer’s testing responsibilities can extend far beyond pure automation. Many companies, especially those moving towards a more mature DevOps culture, see the platform engineer as a crucial bridge between development and operations, actively involved in ensuring the stability of the entire stack.
Consider this: a large e-commerce company deploying a new version of its product catalog service might need a platform engineer to verify not just the application code, but also the underlying Kubernetes cluster, the database scaling, and the integration with the CDN. This isn't solely about writing automated tests; it’s about understanding the *system* and identifying potential issues before they impact users. A platform engineer might spend time manually simulating load, monitoring resource utilization, and even troubleshooting complex networking problems – tasks that often fall to a dedicated SDET.
Defining Your Role: Beyond Scripting and Automation
The key difference lies in *why* you’re testing. An SDET is primarily focused on creating robust, repeatable automated tests that cover all critical aspects of a system. A platform engineer's testing is often more exploratory and problem-solving oriented. It's about validating assumptions, identifying vulnerabilities, and ensuring the system behaves as expected in a realistic environment.
Here’s a concrete example: Let’s say you’re responsible for testing a new internal API. An SDET might build a comprehensive suite of automated tests – unit tests, integration tests, and potentially even end-to-end tests – designed to catch regressions and ensure the API meets specific requirements. A platform engineer, however, might initially focus on manually testing the API’s performance under different load conditions, examining the logs for errors, and verifying that the API integrates seamlessly with other services in the system. They might also be involved in setting up the test environment itself, ensuring it accurately reflects the production environment.
**Actionable Detail:** Start documenting your testing activities. Keep a log of what you’re testing, the methods you’re using, and the results. This will help you understand the scope of your role and demonstrate your value to the team.
Building Your Skills: A Hybrid Approach
Don't feel pressured to immediately become a full-blown SDET. Instead, adopt a hybrid approach. Continue to develop your automation skills – learning tools like Terraform, Ansible, and scripting languages like Python or Go – but also focus on strengthening your operational knowledge. This means understanding concepts like containerization, cloud infrastructure, networking, and monitoring.
For instance, if your company uses Kubernetes, actively learn about its components (Pods, Services, Deployments, etc.). Understanding how Kubernetes works will significantly improve your ability to diagnose problems and proactively identify potential issues with your infrastructure. Similarly, invest time in learning a good observability platform – like Prometheus and Grafana – to effectively monitor the health and performance of your services.
Communication is Key: Bridging the Gap
The biggest risk is falling into a silo – being viewed as a tester without a clear understanding of the overall system. Proactively communicate with developers and operations teams to understand their needs and challenges. Participate in post-incident reviews, offering insights based on your testing experience. Ask questions, seek clarification, and demonstrate a genuine interest in the broader system.
**Actionable Detail:** Schedule regular "brown bag" sessions where you share your testing findings and insights with the wider team. This fosters collaboration and ensures everyone is aligned on the health and stability of the platform.
Takeaway: Own Your Expertise
Your role as a platform engineer offers a fantastic opportunity to develop a unique skillset – one that blends technical expertise with operational understanding. Don’t let others define your role. Focus on building a strong foundation in both infrastructure testing and system operations. By proactively shaping your skills and communication, you can ensure you remain a valuable contributor to your team and avoid being pigeonholed into a purely testing-focused role. Ultimately, the goal is to build a reliable and resilient platform – and your role is central to achieving that.
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