sonnen GmbH

Accountant

• Timely preparation, analysis and quality assurance of monthly and annual financial statements in accordance with German GAAP (HGB)
• Assessment of business transactions and correct accounting under HGB
• Preparation of VAT returns, tax returns and statistical filings
• Execution of intercompany reconciliations at national and international levels
• Working with large data sets, using Excel for analysis and process optimization
• Supporting the head of accounting and actively shaping financial processes

Financial Accountant – Senior Accountant

Customer Success Manager

• You support our installation partners and customers by answering technical inquiries (by phone and email) about our electrical devices, such as battery storage systems.
• You ensure a smooth service process to achieve high customer satisfaction.
• Administrative tasks, such as recording customer data in our database, are part of your responsibilities.
• You analyze error messages and carry out troubleshooting according to established processes and using our tools.
• You meet your performance metrics and keep your targets firmly in focus.

Customer Success Specialist – 2nd Level Support

Support Engineer

• Provide expert technical support to our international partners via phone, chat, and email.
• Handle and document all partner inquiries related to our battery storage systems and chargers using Salesforce.
• Diagnose technical issues remotely, plan on-site service assignments, and coordinate fault clearance and maintenance activities.
• Ensure high partner satisfaction through efficient, cost-effective, and solution-oriented case handling.
• Deliver technical training and guidance to sonnen partners.
• Monitor local regulatory developments to ensure product compliance, and communicate relevant updates or improvement needs to the team lead.
• Meet regularly with our Premium Partners in Belgium and the Netherlands to strengthen cooperation and discuss service-related topics on-site.

Technical Support Specialist, Belgium & Netherlands

SDET

• Reviewing and testing modern analog and digital electronics
• Supporting product development through continuous testing
• Supporting the product compliance team and providing verification reports
• Identifying opportunities to optimize existing product designs and mechanisms

Test Engineer, Python

Security Engineer

• You will serve as the primary point of contact for cybersecurity topics within Corporate IT and advise on secure solutions and architecture decisions.
• Review new tools, services, and infrastructure changes from a security perspective before adoption.
• Support security awareness initiatives, including training programs and phishing simulations.
• Monitor the threat landscape and translate findings into prioritized risk mitigation actions.
• Own the end-to-end vulnerability management process, including triage, prioritization, and coordination of remediation efforts.

Cyber Security Engineer

Salesforce Developer

• You develop and customize Salesforce solutions (Apex, Lightning, APIs)
• You integrate external systems and services into existing applications
• You analyze, troubleshoot, and optimize existing applications
• You collaborate closely with cross-functional teams

Sales

• You are responsible for acquiring and managing our specialist partners and wholesalers in Austria and Switzerland, aiming to build long-term partnerships and ensure high customer satisfaction.
• You drive volume and revenue growth through the sale of battery storage solutions and EV charging solutions.
• Together with the Director Sales DACH and the sales team, you develop a tailored sales strategy and successfully implement it in your territory.
• You handle sales planning, controlling, and reporting for your territory and ensure all targets are met.
• You work closely with Inside Sales, who will support you in managing and assisting partners.
• You motivate partners through targeted training and analyses and help them develop their business.

Regional Sales Manager

Operations

• You automate and enhance operational processes for the virtual power plant, such as integrating decentralized assets into our VPPs and managing asset incidents.
• You analyze quantitative data to continuously optimize the operational efficiency of the systems.
• You support the prequalification of battery systems for providing reserve/ancillary services.
• You conduct and evaluate system test runs.
• You monitor and report KPIs for service level agreements with business customers.
• You work closely with developers and other departments such as Customer Service, Trading Desk, and Business Steering, as well as external service providers and partners.