Application Guide

How to Apply for Senior Full-Stack Software Engineer (m/f/d)

at 1KOMMA5°

🏢 About 1KOMMA5°

1KOMMA5° is pioneering holistic CO2-neutral building solutions by integrating decentralized clean energy, mobility, and heat supply systems. Unlike typical tech companies, they're directly tackling climate change through scalable renewable technology platforms. Working here means contributing to Germany's energy transition while building systems that impact real-world sustainability.

About This Role

This Senior Full-Stack Engineer role focuses on transforming renewable technology sales through marketing automation and CRM platforms at scale. You'll take technical ownership of key systems, drive architectural decisions for scalability and reliability, and mentor teammates while shaping technical direction with product managers. This is impactful because you'll be building the core platforms that enable widespread adoption of clean energy solutions across Germany.

💡 A Day in the Life

A typical day involves collaborating remotely with German-based product managers to refine feature requirements, then implementing scalable TypeScript solutions across React frontends and NestJS backends. You might review architectural decisions with engineering teammates, mentor junior developers on best practices, and monitor system performance of marketing automation platforms that directly impact renewable technology sales across Germany.

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Interview Prep

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🎯 Who 1KOMMA5° Is Looking For

  • Has extensive TypeScript experience with production-level React/Next.js frontends and Node.js/NestJS backends, demonstrated through complex, scalable projects
  • Can articulate experience owning features end-to-end from UX design through deployment and monitoring, with specific examples of architectural decisions made
  • Demonstrates strong API design and system integration skills (RESTful or GraphQL) in previous roles, particularly in marketing automation or CRM contexts
  • Shows evidence of mentoring teammates and evolving development practices, with experience working in English-speaking remote environments (German language skills are a plus)

📝 Tips for Applying to 1KOMMA5°

1

Highlight specific TypeScript projects where you improved maintainability or testability, especially those involving React/Next.js with Node.js/NestJS backends

2

Quantify your impact on scalability or performance in previous marketing automation or CRM platforms - include metrics if possible

3

Demonstrate your understanding of 1KOMMA5°'s business model by connecting your technical experience to renewable energy or sustainability contexts

4

Showcase remote collaboration experience with German or European teams, emphasizing asynchronous communication skills

5

Include examples of architectural decisions you've driven and their business impact, particularly around system integration challenges

✉️ What to Emphasize in Your Cover Letter

['Connect your full-stack experience directly to scaling renewable technology platforms, showing you understand their business model', 'Provide specific examples of taking technical ownership and driving architectural decisions in previous roles', "Demonstrate how you've mentored teammates or improved development practices in remote settings", 'Express genuine interest in their mission of CO2-neutral buildings and decentralized energy solutions']

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🔍 Research Before Applying

To stand out, make sure you've researched:

  • → Understand Germany's 'Energiewende' (energy transition) policy and how 1KOMMA5° fits into this landscape
  • → Research their specific product offerings for CO2-neutral buildings and decentralized energy solutions
  • → Look into the renewable technology sales process in Germany to understand the business context for their platforms
  • → Explore the German remote work culture and expectations for senior technical roles

💬 Prepare for These Interview Topics

Based on this role, you may be asked about:

1 Deep dive into your TypeScript architecture decisions for both frontend (React/Next.js) and backend (Node.js/NestJS) in previous projects
2 Scenario-based questions about scaling marketing automation or CRM platforms for renewable technology sales
3 System design exercise focused on API integration between energy management systems and customer platforms
4 Discussion of your approach to mentoring and evolving development practices in remote teams
5 Questions about monitoring and reliability strategies for critical customer-facing platforms
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⚠️ Common Mistakes to Avoid

  • Presenting generic full-stack experience without specific TypeScript/React/Node.js examples relevant to marketing automation
  • Focusing only on technical skills without showing understanding of their sustainability mission and business model
  • Failing to demonstrate experience with end-to-end feature ownership from UX through deployment and monitoring

📅 Application Timeline

This position is open until filled. However, we recommend applying as soon as possible as roles at mission-driven organizations tend to fill quickly.

Typical hiring timeline:

1

Application Review

1-2 weeks

2

Initial Screening

Phone call or written assessment

3

Interviews

1-2 rounds, usually virtual

✓

Offer

Congratulations!

Ready to Apply?

Good luck with your application to 1KOMMA5°!

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