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Senior Software Engineer - Ruby on Rails (m/f/d) Munich, Berlin or Hamburg

Remote: 
Full Remote
Contract: 
Full time
Experience: 
Mid-level (2-5 years)
Work from: 
Germany

Offer summary

Qualifications:

Proven experience in writing maintainable code with Rails, Experience with RESTful APIs and performance optimization.

Key responsabilities:

  • Contribute to backend applications
  • Shape requirements from complex business problems
  • Foster innovation
  • Improve developer experience and document decisions
1KOMMA5° logo
1KOMMA5° Scaleup https://www.1komma5grad.com/
1001 - 5000 Employees
About 1KOMMA5°
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.
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Job description

1KOMMA5°
We are looking for you as an addition to our tech-team in Berlin, Munich or Hamburg. 1KOMMA5° is building Germany's largest one-stop-shop for sale, installation and services related to solar, heat pumps, electricity and charging infrastructure. And they are all connected! Be a part of our mission!
Your mission

You will work on transforming the business of installing renewable technologies. With our core business software platform we streamline ground operations and rooftop installation to power the energy transition in private homes and small businesses world-wide. 

As a software engineer in 1KOMMA5°, you will be one of the first members of a cross-functional team alongside frontend and backend engineers, product managers and UX/UI developers. You will help build a self-organized tech team, responsible for developing, deploying and running their own solutions to contribute to those work streams. 

Our Stack

  • Ruby on Rails 7 and Postgres for several API-only applications, RSpec for testing

  • vue.js/TypeScript for frontend applications, Flutter for mobile applications

  • Infrastructure as code, deployment to Google Cloud, observability with Datadog

  • Google Cloud Tasks and Delayed Job for background jobs


Your profile

Key responsibilities include but are not limited to:

  • Contribute your skill and experience to a team of self-driven software engineers

  • Extending and maintaining business critical backend applications 

  • Help shaping actionable requirements from complex and undefined business problems

  • Foster a culture of experiment-driven innovation

  • Improve developer experience by constantly avoiding/reducing tech-debt, automating as much as possible and documenting decisions, runbooks etc.

You have:

  • proven experience in writing maintainable, self-describing, reusable and testable code with Rails and other major back-end or full-stack technologies in several past projects

  • experience designing and maintaining RESTful APIs 

  • experience with measuring and improving performance

  • an agile and result-oriented mindset and a passion to support your team colleagues

  • interest or experience in human-centered software development 

  • excellent knowledge of spoken and written English, German is a plus

  • residency in Germany

  • We are an ambitious and dynamic company with a talented team. We require our engineers to be imaginative, enthusiastic, and willing to tackle new challenges as we strive to make an impact. 
Benefits

  • Being part of a global change movement and seeing the impact of your work, daily

  • Working remote first, with the option to travel in consultation with the CTO

  • Individualized opportunities for professional development

  • Working in a diverse team with hard workers and real team players

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About us
"At 1KOMMA5°, our vision is to accelerate CO2 neutral life for all! We created an easy one-stop-shop to buy and install solar, charging stations and heat pumps, with the purpose of liberating all European homes from the shackles of fossil fuels. With Heartbeat, we make clean energy smarter. Connecting our customers into one powerful clean energy operating system to enable flexible tariffs and to ultimately follow the rhythm of wind and sun!" - Philipp Schröder (CEO 1KOMMA5°)

Required profile

Experience

Level of experience: Mid-level (2-5 years)
Industry :
Sustainable development
Spoken language(s):
EnglishGerman
Check out the description to know which languages are mandatory.

Hard Skills

RESTful APIGoogle Cloud Platform (GCP)Flutter (Software)Ruby On RailsAgile MethodologyPostgreSQLDatadogVue.js (Javascript Library)RspecRuby (Programming Language)

Other Skills

  • Verbal Communication Skills
  • Open Mindset
  • Goal-Oriented
Are you interested?

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