Why this matters:
A full stack developer is faced with many considerations before settling on a tech stack. Their answer will show how they think about choosing technologies. This question is also an opportunity for you to gauge how much experience they’ve had with the available tech — and which tool sets they prefer.
What to listen for:
- Mention of at least one major technology such as CSS, Ruby, or JavaScript
- Discussion of what was learned and what could be done differently to improve efficiency
Why this matters:
There are many ways to store passwords, but only a few approaches are considered absolutely secure from the front to the back end. Ideally, the candidate will be able to explain which specific security features are essential. Their answer to the second part of the question will shed light on how user data is protected from interface to databases.
What to listen for:
- Approach for handling a similar scenario in a prior role
- References to plain text passwords, cryptographic hash functions such as MD5 and SHA-1, and salt
Why this matters:
Being able to answer a complex question in a short amount of time is not easy. A highly qualified full stack developer won’t flinch. They should be able to describe their approach in a clear, concise way, while shedding light on their industry knowledge. Those who get flustered or have a difficult time may not be up for a challenge.
What to listen for:
- Discussion of development concepts such as user experience and bugs
- Confident answers that indicate readiness to tackle challenges
Why this matters:
Most full stack developers would have a very difficult time choosing one language among the many options available. Over their career, they will find that one language may be better suited to a project than another. Their answer will show how much they’re engaged with the industry — and how deep their passion runs for their craft.
What to listen for:
- Struggling to answer or an inability to choose are good signs
- Reference of past projects and thought processes behind programming choices
Why this matters:
A full stack developer is able to see the big picture if they can assess how a website or program should look and feel, while also understanding the technical limitations of different implementations. These developers are valuable to a team because they can address and discuss both aspects of the web development process — and bridge any disconnect.
What to listen for:
- References to previous front end and back end development projects
- An understanding of the importance of versatility and effective time management
Why this matters:
Quality assurance is integral to the success of every implementation. Development projects often require a team of minds, and pointing out bugs or flaws is part of the territory. Not only will the answer demonstrate how much the candidate values precision, it will show how comfortable they are working with others.
What to listen for:
- A detailed approach for generating a solution that reduces programming bottlenecks
- Strong takeaways that can be taught to others to improve organizational efficiency
Why this matters:
This question is designed to demonstrate the scope of the candidate’s skill set and how comfortable they are juggling projects. The best full stack developers can easily jump from coding a landing page to fixing a networking issue to meeting with clients in one day. Having the knack for planning and time management is key.
What to listen for:
- Understanding of the importance and technical aspects of both design and architecture
- Engagement in a variety of required tasks, and willingness to navigate multiple projects and deadlines
Why this matters:
The world of development is ever-changing. The candidate should have a current knowledge of the field and a desire to keep learning as it evolves. If they’re not in tune with the tech community, working on independent projects, or brushing up on their skills, they may not be a forward-thinking employee.
What to listen for:
- Experience with coding meetups, personal projects developed with new technology, or online learning platforms
- Demonstrable interest in advancing programming skills through avenues outside of work
Why this matters:
Development can be a complex minefield, so nearly all full stack developers have had their share of barriers and roadblocks. The details of this answer are not as important as the willingness to discuss flaws or struggles. Essentially, if they haven’t faced a challenge, they might not be as experienced as you need.
What to listen for:
- Where difficulties arose, what was learned, and how this experience influenced the development approach
- Willingness to ask for help or refer to outside resources for assistance
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