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

1KOMMA5°

Role overview

Qualifications

  • 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
  • Good spoken and written English
  • You communicate openly and proactively, and you thrive in a remote, async team

Responsibilities

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

Key facts

Hard skills

Mobile Application Development Flutter (Software) Test Automation Continuous Delivery gRPC Cloudant Cross-Platform Applications DevOps

Other skills

  • Communication
  • Teamwork
  • Problem Solving

About the company

1KOMMA5° logo

1KOMMA5°

Cleantech / Climate Tech

1KOMMA5° wurde im Juli 2021 mit dem Ziel gegründet, alle Gebäude CO2 neutral zu machen. Dies erfolgt durch den Einsatz von Photovoltaik, Wärmepumpe und Ladeinfrastruktur in Verbindung mit einer intelligenten und individuellen Steuerung aller Systeme basierend auf künstlicher Intelligenz, um den besonders günstigen Preiszonen von Sonne und Wind direkt an der Strombörse zu folgen. Nach drei Jahren hat das Unternehmen bereits 100.000 Kunden bedient und gilt damit laut EUPD Studie seit 2024 als europäischer Marktführer. Technologisches Herzstück ist die Software Plattform “Heartbeat AI”. Sie verbindet Wärmepumpe, Ladesäulen und Strombatterien direkt mit der Strombörse und steuert jedes einzelne Systeme nach individuellen Fahrplänen durch künstliche Intelligenz. So wird individuell immer der jeweils günstigste und sauberste Strom bereitgestellt, ob vom eigenen Dach oder vom Energiemarkt. Zurzeit betreibt 1KOMMA5° über 75 Standorte und Meisterbetriebe mit rund 2.200 Mitarbeitenden von Europa bis Australien. Zusätzlich arbeitet 1KOMMA5° kontinuierlich an der Weiterentwicklung der Heartbeat AI 🤖 Platform hierzu arbeiten allein am Entwicklungsstandort in Berlin über 200 Entwicklerinnen und Entwickler. Bereits 30% der mit Heartbeat AI verbundenen Haushalte erwirtschaften durch den Verkauf von Strom in Hochpreisphasen mehr Erlöse als sie Stromkosten. Insgesamt steuert das System nach kurzer Zeit bereits über 40.000 Energiesysteme.

Company details

Company typeScaleup
IndustryCleantech / Climate Tech
Company size1001 - 5000

Links

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Job description

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 more about our Product & Tech team!

Your mission

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.

Your profile

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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MR

Marcus Rivera

Chief Revenue Officer

m.rivera@company.com
linkedin.com/in/marcusrivera
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