1KOMMA5˚

Senior Software Engineer - Mobile (m/f/d)

Remote, United States remote Entry Salary not listed
remote Technology & IT Curated
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About the role

1KOMMA5°

At 1KOMMA5°, we pursue a clear vision: Living on wind and sunlight forever for free. To make this a reality, we are building the energy system of the future with Heartbeat AI. Want to be part of it?

We bring together regional craftsmanship and scalable software: We don't think of solar, batteries, heat pumps, and e-mobility as isolated components, but control them as an intelligent, integrated overall system in our virtual power plant. Directly connected to the electricity market – in real time, fully automated. This way, energy is used when it is available from renewables and particularly cost-effective. By 2030, our goal is to transition 1.5 million households to renewable energies. Over 3,000 people are working towards this every day, at more than 80 locations worldwide, from Finland to Australia.

Want to take responsibility and build solutions that truly matter? Apply now and help us shape the energy world of tomorrow.

Become a part of our mission and learn about our Product & Tech team!

Deine Position

We're building the Installation Manager: the mobile app our field teams rely on to digitize everything from ground operations to rooftop installations. As the business scales, more and more depends on this app working beautifully. That's where you come in.

You'll join a cross-functional team of frontend, backend, product, and design folks, and help shape a self-organized group that owns what it builds end to end. We work remotely (Germany-wide), async by default, with offices in Hamburg, Berlin, and Munich if you like one.

A note on our stack: the app is built in Flutter. You don't need prior Flutter experience. If you've shipped and maintained quality mobile apps on any stack and you're excited to go deep on Flutter, we want to talk. We care far more about how you think, ship, and raise the bar for the people around you.

What you'll do:

Shape the technical direction of the Installation Manager: architecture, release quality, performance, and long-term maintainability

Ship reliable, well-tested mobile features and help the team build a strong automated-testing and continuous-release practice

Mentor and grow the engineers around you, sharing what you know across team boundaries (not just within your own role)

Work closely with product, design, and backend to turn real field feedback into a better product

Help debug the messy, interesting problems that come with hardware-connected apps in the real world
Technologies and tools you'll work with: Flutter, Patrol, Firestore, GCP (Pub/Sub, Cloud Functions), GitHub, Linear, Miro, and ShapeUp.

Dein Profil

What we're looking for:

Solid experience building, shipping, and maintaining mobile apps in production (any stack; Flutter not required)

A genuine testing mindset: you've built or driven automated testing and continuous delivery

You communicate openly and proactively, and you thrive in a remote, async team

You lift the people around you, and you care about the craft as much as the outcome

Good spoken and written English
Nice to have (truly optional, please apply without these):

Flutter, or other cross-platform mobile experience

Experience building for non digital-native users (our users are out in the field, not at a desk)

Cloud / DevOps experience, ideally Google Cloud

API design experience, or breadth beyond mobile (backend, frontend, infra)

Interest in climate tech
We're building a diverse team on purpose. We welcome applications from people of every background, gender, age, origin, religion, disability, or identity. If you're excited about this role but don't tick every box, please apply anyway, we'd rather hear from you. Need any accommodation during the process? Just tell us, and we'll make it work.

Benefits

You are part of an international, dynamic, and highly motivated team of people who have proven to make things happen

With your work, you accelerate the "energy transition" and hence have a direct impact on our climate

Work with and learn from other super-smart colleagues

You will enjoy direct contact with core decision-makers

You will enjoy the best chances of entering full-time in one of Europe’s most thriving scaleups

You work remotely (Germany-wide), with offices in Hamburg, Berlin, or Munich

Create a healthy balance alongside your work and enjoy all the benefits of the EGYM Wellpass

Whether city bike or e-bike - be flexible with our job bike leasing and do something good for the environment at the same time

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Interview prep

Walk in with sharper answers.

Use this as a quick practice sheet before you speak with the employer.

Role
Technology & IT API integration Operations Remote Collaboration Senior Software remote

Likely questions

  1. Tell us about work you have done that is close to the Senior Software Engineer - Mobile (m/f/d) role.
  2. How would you approach your first 30 days at 1KOMMA5˚?
  3. Which of API integration, Operations and Remote Collaboration have you used recently, and what did it help you achieve?
  4. Describe a time you solved a problem without waiting to be told exactly what to do.
  5. How do you stay organised and communicate clearly when working remotely?

Prepare before the call

  • A recent example that proves your experience with API integration, Operations and Remote Collaboration.
  • One short story with a problem, your action, and the result.
  • Two examples that show the strengths listed on your CV.
  • A clear reason why this role and company interest you.
  • Your availability, preferred work style, and salary expectations.

Ask them

  • What would success look like in the first 90 days?
  • What are the main problems this hire should help solve?
  • How does the team give feedback and measure good work?
  • What does a normal working week look like for this role?
Practice line

I am interested in the Senior Software Engineer - Mobile (m/f/d) role because I can bring practical experience in API integration, Operations and Remote Collaboration, learn the team quickly, and contribute to the outcomes 1KOMMA5˚ needs from this hire.

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