Senior Backend Developer (f/m/d) | JobSetuu

Description

Job Overview

• Source: Arbeitnow
• Location: Cologne
• Job Type: Full-Time

Job Description

About us

At aedifion, you will actively shape the future of energy-efficient building operations. Our mission is to make existing buildings smarter, more sustainable, and easier to manage making a real contribution to CO₂ reduction. You'll join an innovative tech company that uses cutting-edge technologies like IoT, AI, and cloud solutions to enable sustainable real estate. Our culture? Open, diverse, and team-oriented. With more than 100 colleagues from various nations, we combine a wide range of expertise and perspectives to achieve big things together.

Your impact in this role:

As Senior Backend Developer (f/m/d) in our Data Team, it is your mission to ensure the stable operation of critical backend systems and data-near infrastructure that form the heart of aedifion's platform. You connect operational reliability with continuous improvement and contribute significantly to delivering on aedifion's plug-and-play promise by reducing technical debt, improving test coverage, and building scalable automation that makes buildings worldwide more energy-efficient.

What to expect:

• Maintenance & Operations: Ensure reliable operation of the Multilogger and Edge Device services through proactive maintenance and systematic resolution of critical errors in production systems.

• Backend Development: Design, implement, and continuously improve Python-based services for operations, infrastructure, and API integrations with a strong focus on maintainability, scalability, and established best practices.

• Test Culture: Actively drive the improvement of automated test coverage across critical system components and establish sustainable testing best practices that ensure long-term code quality and system reliability.

• Infrastructure & Containerization: Work with containerized systems and Kubernetes to deploy, monitor, and optimize backend services in resource-constrained edge environments with consideration for DevOps workflows.

• Process Automation: Reduce manual effort in project onboarding processes through systematic infrastructure development and intelligent automation that scales across multiple customer deployments.

• API Integrations: Develop and maintain clean, robust integrations with external systems and services that extend platform capabilities while ensuring reliability and performance.

• Knowledge Sharing: Contribute to team growth through natural, situational mentoring, comprehensive documentation, and active participation in code reviews that elevate overall technical standards.

Benefits

• Make a difference: Your work helps to reduce CO₂ emissions and make buildings more sustainable and energy-efficient.

• Mobile work: Organise your working day according to your needs – with flexible working hours, short core working hours and the freedom to work from our modern office in Cologne, remotely from anywhere in Germany or up to 10 days a year from other European countries.

• Long-term prospects: After your probationary period, we offer you a permanent contract.Feel-good offer: With 30 days of annual leave, you can relax and unwind, while fresh organic fruit, regional coffee, free drinks and our monthly team breakfast provide you with your daily energy boost.

• Further training: We support you with tailor-made training opportunities to advance your career.Tech stack: You will receive modern work equipment of your choice – whether Microsoft or Apple – as well as high-quality noise-cancelling headphones for focused work.

• Mobility package: Always mobile: you can choose between the Germany Ticket or a Jobrad bike – for your commute or private use.

• Pension provision: Subsidies for capital-forming benefits (VWL) or company pension schemes (bAV).

• #teamaedifion: Regular team events, working on an equal footing, actively sharing experiences and flat hierarchies promote strong teamwork and open communication within our team.

• Dog-friendly office: Bring your dog along – we look forward to some animal support.

What You Bring:

• Experience: Extensive expertise in backend development with Python in production environments, with demonstrable success in operating and evolving critical services in operational, high-availability contexts.

• Containerization & Orchestration: Solid, senior-level proficiency in working with containerized systems and Kubernetes, including deployment, monitoring, and troubleshooting in production environments.

• Testing Expertise: Proven experience in building and improving automated test coverage using modern testing frameworks and strategies, with a track record of establishing quality-driven development practices.

• Operational Mindset: Strong ability to prioritize effectively in day-to-day operations, handle ad-hoc requests with composure, and balance urgent incidents with planned development work autonomously.

• Technical Craftsmanship: Deep commitment to code quality through clean code principles, established design patterns, comprehensive documentation and sustainable implementation decisions that facilitate long-term maintainability.

• Communication & Collaboration: Clear, proactive communication style with the ability to explain technical decisions, engage in constructive code reviews and collaborate effectively in cross-functional teams.

• Languages: Fluent English proficiency in written and spoken communication for effective international team collaboration and technical documentation.

• Nice-to-have: Experience with Go/Golang for performance-critical components, familiarity with agile methodologies (Scrum) and exposure to IoT, edge computing or time-series databases (e.g. InfluxDB) are valuable additions.

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Expert Career Tips for Senior Backend Developer (f/m/d) Roles

To succeed in a competitive market as a Senior Backend Developer (f/m/d), you need more than just technical skills. Here are some expert strategies to elevate your profile:

• Build a Strong Portfolio: For technical roles, a clean GitHub or a personal project site is essential. For non-technical roles, a case study portfolio demonstrating problem-solving and impact is equally valuable. Show, don't just tell, what you have achieved in your previous positions.
• Master the Narrative: When interviewing, use the STAR method (Situation, Task, Action, Result) to structure your answers. Quantify your results wherever possible—mentioning "increased efficiency by 20%" is much more impactful than saying "improved efficiency."
• Continuous Learning: The industry moves fast. Whether it's staying updated with the latest AI tools or mastering a new management methodology, continuous professional development is key. Consider obtaining industry-recognized certifications that align with Senior Backend Developer (f/m/d) requirements.
• Networking: Connect with other professionals in similar roles. Join online communities, attend webinars, and engage in meaningful discussions on professional social networks. Often, the best opportunities come through referrals and community engagement.
• Soft Skills Matter: Communication, empathy, and leadership are often the deciding factors between two equally qualified technical candidates. Cultivate these skills as they are universally valued across all industries and seniority levels.

Additionally, research the specific company's culture and values. Tailoring your application to show how you align with their mission can significantly increase your chances of moving forward in the process.

Salary & Compensation

Salary not disclosed; typically competitive for the role.

Work Arrangement

Type: On-Site

Standard business hours at the office.

Comprehensive Application Strategy & Hiring Process

Applying for a new role is a marathon, not a sprint. Follow this strategic approach to maximize your success rate:

1. Initial Research & Tailoring

Don't send the same resume to every employer. Spend at least 30 minutes researching the company. Look for recent news, their product roadmap, and their team structure. Modify your summary and core competencies to reflect the specific keywords found in the job description.

2. The Perfect Cover Letter

If the application allows for a cover letter, use it to tell a story that your resume cannot. Explain why you are passionate about this specific company and how your unique background makes you the perfect fit for the challenges they are currently facing.

3. Navigating the Multi-Stage Interview

Most modern hiring processes involve 3-5 stages. This typically includes a recruiter screen, a technical or skill-based assessment, a peer interview, and a final leadership round. Prepare for each stage differently: focus on enthusiasm and fit for the recruiter, technical depth for the assessment, and strategic vision for the leadership round.

4. Post-Interview Follow-Up

Always send a personalized thank-you note within 24 hours of each interview. Reference a specific topic discussed during the call to demonstrate your active listening and genuine interest in the role.

By following these steps, you demonstrate a high level of professionalism and attention to detail that sets you apart from the average applicant.

Typical Interview Process

1. Resume screening
2. HR call
3. Skill interview
4. Final manager interview
5. Offer

Tip: Research the company's products and culture.

Global Market Intelligence & Relocation Insights

At JobSetuu, we specialize in helping talent navigate the global job market. Here is what you need to know about the current landscape in Cologne and beyond:

The demand for skilled professionals is increasingly borderless. For roles based in Cologne, understanding the local cost of living, visa requirements (if applicable), and cultural nuances is vital. If this is a remote role, consider the time zone alignment and the asynchronous communication culture of the hiring organization.

Relocation Support: Many forward-thinking companies offer relocation packages that include moving stipends, temporary housing, and legal assistance with work permits. When evaluating an offer, look beyond the base salary—consider the total compensation package, including equity, bonuses, and healthcare benefits.

Work-Life Balance Trends: Hybrid and remote work have become standard in many regions. Research the local labor laws and common practices regarding work hours and vacation time to ensure the role aligns with your lifestyle goals.

Leveraging JobSetuu's tools can help you compare salaries across different cities and understand the "purchasing power" of your potential offer, ensuring you make an informed decision for your long-term career path.

Skills & Competency Roadmap for Professional Development

To remain competitive in Professional Development, we recommend focusing on the following core competencies over the next 12-18 months:

• Technical Mastery: Deepen your expertise in the core tools and languages relevant to your field. For developers, this might be cloud architecture; for marketers, it might be data-driven attribution modeling.
• AI Augmentation: Learn how to leverage generative AI and automation tools to increase your productivity. Understanding how to integrate these technologies into your workflow is becoming a non-negotiable skill.
• Leadership & Strategy: Even in individual contributor roles, the ability to think strategically and lead projects from inception to completion is highly valued. Focus on stakeholder management and high-level project planning.
• Data Literacy: The ability to interpret data and use it to drive decisions is essential across all business functions. Familiarize yourself with data visualization and basic analytical concepts.

By investing in these areas, you not only prepare yourself for the role you are applying for today but also build a resilient foundation for the opportunities of tomorrow.

Apply via JobSetuu

Discover your next career milestone on JobSetuu. This Senior Backend Developer (f/m/d) position is part of our commitment to bringing you the most relevant and high-impact job openings globally. At JobSetuu, we simplify your job search by aggregating premier listings and providing the tools you need to stand out. Don't miss the chance to elevate your professional journey—explore more opportunities and career insights on our platform today.