

Core offering: AI-driven battery simulation, analytics and testing services (foundation model APEX)
Data scale: Operates 1,500+ test channels and generates ~2 TB of data weekly
Founding team: Co-founded/managed by Lukas Lutz, Luca Scherrer, Daniel Alves Della Corte
Headquarters / entities: Germany-headquartered (Battery Sphere GmbH) with Sphere Energy SAS (France) listed
Employee count (sample): 116 (snapshot provided)
Battery R&D, testing, lifecycle prediction and data-driven validation for battery development and production.
Battery technology / Energy storage
Dealroom lists an Oct 2025 funding entry describing DEKRA as 'Growth Equity non VC' with amount not disclosed
“Has secured a major investment/partnership with industry backers including DEKRA”
View all jobs Kotlin Backend Developer Remotely, Anywhere At Sphere, we offer management consulting, end-to-end technology solutions, enterprise applications, software engineering, data analytics, and staff augmentation services, through onsite and remote world-class teams. Sphere Partners partnered with cutting-edge insuretech company that aims to disrupt the existing legacy industry. The company uses powerful technology to offer everyday drivers better coverage for less money. Now we are looking for a Backend Kotlin Developer to join our team. Position: Full-time (Remote) Term: Long-term Responsibilities Include But Are Not Limited To * Design, implement, and maintain efficient, reusable, and scalable server-side code using Kotlin, Typescript (for backend development and requires handling a complex central codebase); * Support production applications including on-call responsibilities; * Develop robust and secure RESTful APIs; * Help improve, expand and maintain our acquisition, applicant and customer APIs; * Design and implement database schemas with a focus on data consistency, integrity, and optimization; * Optimize and maintain database performance for high-volume applications; * Work with the engineering and product team to help bring the features on our ambitious roadmap to life for our customers. Requirements: * Experience as a backend developer with a focus on Kotlin; * Experience with TypeScript as a backend developer; * Experience with database systems (PostgreSQL, MySQL, etc); * Experience with unit testing, integration testing, and continuous integration tools; * Experience with cloud platforms (e.g., AWS, Azure, or GCP); * Understanding of microservices architecture and its implementation. If you are an experienced Senior Backend Kotlin Developer with a passion for building scalable and efficient server-side solutions, we encourage you to apply and contribute to our dynamic and innovative development team at Sphere Partners.
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