Becoming a web engineer is not easy, but there are tons of resources out there to help you on your journey. But where do you go from there? What do you do to keep growing, and to keep expanding the value you bring to your company? In this talk we’ll look at the different kinds of impact you can have as a web engineer. We’ll walk through what it means to take on bigger, more complex projects, and how to scale yourself, and grow the community around you. By driving our own development we can all grow our impact, and in this talk, we’ll discuss how to go about this.

Every bug is different: Some are lurking around for months, others appear suddenly after the upgrade of a dependency. Some are introduced us, others other teams or systems. Some are painfully obvious and affect all users, others only occur in edge (cases). And the ways of finding, and eventually, preventing them, are just as diverse: be it snapshot, unit, integration, end to end tests or automated visual tests, every kind comes with its challenges and opportunities. Testing UIs is hard, but in the end, only test automation can give us the confidence we need to move fast and refactor our code relentlessly. In this talk we are going to look at what kinds of bugs there are, which tests are most effective for catching which, and how we can implement them using modern front end technologies.

Most of us have heard that tests should be isolated, composable, or deterministic, but what does that mean in practice? How do you write a good test and how does the rest of your codebase change once you do? What effect does it have on your developer experience? In this talk I'll walk through a hand full of properties good tests have, show how we can write tests that follow these guidelines in JavaScript, and discuss when to consider bending the rules a bit.