How to apply for Senior Fullstack Engineer (all genders)

About envelio

envelio builds software for intelligent power grids. The company's stated purpose is to support a sustainable energy future worldwide. This is a remote role based in Germany, so you would work with a distributed team.

About the role

You will work in a cross-functional team on envelio's core products, building both backend and frontend features. You own the full development process: concept, implementation, testing, and go-live. The role includes designing APIs and integrating with third-party systems.

A typical day

You would join stand-ups and planning with your cross-functional team, then spend most of the day writing backend Python code or frontend components. You might design or review an API, write SQL queries, and test your work before it goes live. Since the team is remote, communication happens through chat and video calls.

Who envelio is looking for

• 3+ years of fullstack web development experience, with Python on the backend
• Has designed and consumed APIs, including integration with external or third-party systems
• Strong SQL skills for data modeling and query writing
• Proficient in modern frontend development with Vue, React, or Angular
• Business-fluent English at C1 level and works well in a team

Tips for this application

• Show at least one project where you owned a feature end-to-end, from concept through testing to go-live, since the job description stresses full ownership.
• Name the JavaScript framework you use most (Vue, React, or Angular) and give a concrete example of frontend work in it.
• Describe a specific API you designed or integrated, including how you handled communication with a frontend or a third-party system.
• Give an example of SQL data modeling or a complex query you wrote, because the role requires database work.
• State your English level as C1 or equivalent, and note your location in Germany since the role is remote there.

What to cover in your cover letter

Your cover letter should cover: 1) a fullstack project you owned end-to-end, 2) your Python and API integration experience, 3) the frontend framework you know best with a concrete example, 4) your SQL data modeling and query experience. Mention why envelio's work on intelligent grids for sustainable energy interests you.

Research before applying

• Read envelio's product pages to understand what their core products do for grid operators.
• Look up what 'intelligent grids' means in the German energy market and why software matters there.
• Check envelio's engineering blog or tech talks, if they exist, to learn their stack and practices.
• Find out how their remote setup works in Germany: team distribution, meeting cadence, and tools.

Likely interview topics

Based on the job description, expect questions about:

• Walk through a feature you built from concept to go-live. What decisions did you make and how did you test it?
• How have you designed an API that a frontend or a third-party system consumes? What trade-offs did you consider?
• Describe your experience with SQL data modeling. How do you structure tables and write queries for performance?
• Which JavaScript framework do you prefer and why? How do you structure components in a large application?
• How do you keep code at industry best practices in an agile team? Give an example of a process or tool you introduced.

Common mistakes to avoid

• Applying without showing end-to-end ownership of a feature, since the job description emphasizes taking ownership from concept to go-live.
• Listing many frameworks without depth in one, when the role asks for proficiency in at least one of Vue, React, or Angular.
• Ignoring the API and third-party integration requirement, which is a core part of the backend work.