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Backend Developer (all genders)

Festanstellung, Vollzeit · Mainz, Frankfurt am Main, Remote, Hybrid
Your mission
Through predictive analytics and a B2B Lifecycle-Management Solution, Circunomics is challenging the automotive industry, BESS Manufacturer, 2nd-life applications, and recyclers to embrace a more circular approach. 

CX-Video 2023 — https://youtu.be/ZrFiz-M0Xrc  
Product Video 2023 — https://youtu.be/OGpx4Wkmetw
Your profile
You will 
  • Designing and operating container-based applications
  • Architect and deploy technologies for AWS cloud environments
  • Taking a full ownership for the full life cycle or the requested feature
  • Assessing the efficiency and performance of current applications
  • Staying abreast of developments in web applications and programming languages
  • Pushing for Improvements in our current applications and infrastructure
  • Writing self-documented and creating understandable technical solutions
  • Analyzing the business requirements and creating technical requirements based on them
  • Collaborate closely with frontend teams in an agile environment
  • Conduct thorough code reviews to maintain quality standards
  • Own features end-to-end, providing support across development, testing, and configuration
  • Troubleshooting and debugging applications
You have 
  • 5+ years of professional backend development experience
  • Possessing strong communication skills and a collaborative mindset to foster teamwork, align goals, and drive collective success.
  • Profound knowledge working in projects with PHP or Python (preferred both)
  • In-depth understanding of message-based systems, RESTful, API design, microservice architectures, and distributed systems
  • Experience with SQL/NoSQL-based database systems and schema designs
  • Familiarity with Docker and containerization
  • Understanding of cloud fundamentals. Familiarity with at least one cloud provider.
  • Ability to write effective tests for the developed functionality
  • Ability to write clean, maintainable and understandable code with well-structured coding practices
  • Being able to communicate effectively and collaborate with the team
  • CI/CD pipeline design and implementation
Bonus points for: 
  • Experience with Node.js, and Serverless functions
  • Degree in computer science or a similar technical field
  • Experience with Symfony Framework
  • AWS Certifications
  • Knowledge in Domain-Driven-Design
  • Infrastructure as Code experience (Terraform, CloudFormation)
Why us?
  • Flexible Working Hours: Embrace a healthy work-life balance with our autonomous scheduling that lets you manage your day effectively.
  • €50 Monthly Perks: Receive a monthly stipend to use on wellness, dining, or other benefits that suit your lifestyle.
  • 28 Holiday Days + Public Holidays: Enjoy generous time off, including the ability to carry over days or earn extra days for milestones.
  • Dedicated L&D Budget: Invest in your growth with a budget covering professional certifications, conferences, and personal development opportunities.
  • Hybrid Work Options: Work from home part-time or full-time, with flexibility around core hours to suit your needs.
  • Flat Hierarchies: Experience open communication and collaborative decision-making in our innovative environment.
  • Career Growth & Mentorship: Advance your career with creative freedom, mentorship programs, and clear leadership opportunities.
About Us
Circunomics GmbH, based in Mainz, Germany was founded in 2019. Circunomics is leading the industry by offering a comprehensive battery lifecycle management solution. Co-Founders, Felix Wagner and Jan Born, are dedicated to establishing a true circular battery economy, which in turn, maximizes each stage of battery life. Along with their team, they seek to inspire the movement of batteries from the automotive industry, to the energy sector, and finally on to recyclers who close the loop by recovering any remaining raw materials.   
 
Circunomics has developed an AI-powered, B2B marketplace where cells, modules, and packs can be sold and purchased. Through the Circunomics Analytics product, sellers and buyers alike can obtain a detailed view of their assets. From current SoH to 2nd-life simulation, this product allows for a simpler and more profitable lifecycle management. Circunomics knows that lifecycle planning is complex, and the Battery Matchmakers are on a mission to help ease this process for their customers.  

The company has been supported thus far by seed investors and business angels. Startup builder Next Mobility Labs, recycler TES, Orlen VC, and Dr. Peter Mertens (former Chief Technology Officer of Audi) are some of the key players. The Series A funding round was completed in December of 2024 with the addition of investors, Schaeffler and GET Fund.   

Official expansion into the US Market transpired in January of 2025 with the hiring of Adam Willmouth who will serve as the company's US Managing Director. Circunomics looks forward to further collaboration with current US clients and to further growth within this key global market. 
  
Top Awards Received: 
- US-based company Frost & Sullivan awarded Circunomics the 2023 Market Leadership Award. This award identified Circunomics as the Best in Class within the European Circular Marketplace for the Battery Trade Industry. 2023 Market Leadership Award Exposé by Frost & Sullivan  
- Automobilewoche and McKinsey & Co. awarded Circunomics 2nd Best StartUp within the automotive industry for 2023  
- Motor Presse Stuttgart, with its leading automotive trade magazine, auto motor und sport, and the HUK-Coburg insurance group awarded Circunomics the Safety & Environment Award for 2024. For more info here.

Top Publications and Podcasts: 
- Auto motor und sport podcast
- Spotify Episode
- E world essen
- Easy engineering - most advanced digital life cycle 

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