Full-Stack Software Engineer (Frontend-Focused)

The Germany-based team serves as the company's software and digital solutions hub, developing platforms that enable customers to analyze, manage, and extract valuable insights from complex battery data. By combining expertise in battery science with modern software engineering, the company helps customers accelerate innovation, improve product performance, and make informed technical and business decisions. With customers across Europe, North America, and Asia, this company is experiencing continued growth driven by the increasing demand for battery technologies, electrification, and data-driven development solutions., We're building a high-impact SaaS platform at the intersection of Battery Design, Development, and Production and software, focused on solving real-world problems in the battery ecosystem. We're looking for a Full-Stack Engineer with strong front-end skills and a passion for building real products. You'll be responsible for taking ideas from concept to live, collaborating closely with other team members and stakeholders, and shipping features that customers love. This role is ideal for someone who's built and launched real products, understands tradeoffs, and can balance speed with craft., Own features end-to-end, from rough wireframes to deployed apps Build high-quality, modular, and performant UIs using React.js and any other most suitable tools. Collaborate with product/design to shape UX that's intuitive Design and build scalable APIs and backend logic using NestJS and Python Architect solutions that are maintainable, extensible, and clean Participate in roadmap discussions, give feedback, and contribute to product direction Push for quality through thoughtful code reviews, testing, and refactoring Constantly look for ways to optimize dev speed and output quality

Mandatory Qualifications (All must be met): Bachelor's degree in computer science, Engineering (any field), or a related quantitative discipline, and at least four (4) years of experience building software products Proven track record of building and maintaining real-world applications Strong React.js experience and frontend fundamentals (performance, accessibility, usability) Solid backend development experience (NestJS and/or Python a big plus) Clear understanding of product tradeoffs and agile product development Strong communication skills - you ask questions, raise flags, and explain your thinking Startup-ready: you're comfortable wearing multiple hats, working fast, and owning outcomes. Any suitable combination of education, training, and/or experience is acceptable. Bonus (Nice to Have) Experience working at an early-stage startup or shipping SaaS products Development experience for project management software Battery development and production experience Familiarity with microservices or event-driven architecture UX sensibility and ability to collaborate deeply with designers Passion for developer experience and good internal tooling Experience with cloud services Tech Stack Frontend: React.js (Hooks, Context, modern state management, component libraries) Backend: NestJS (Node.js), Python (FastAPI for data services) Databases: PostgreSQL, Redis, NoSQL Infra/DevOps: Docker, AWS, GitHub Actions Tooling: Figma, Linear

Salary Range: €60,000-€80,000 gross per annum Work Style: 100% onsite in Stuttgart office Team Environment: Agile, collaborative, and high-ownership culture Career Growth: Clear path toward leadership or specialist roles Learning & Development: Direct access to founders and product teams

This company is an innovative technology business operating at the intersection of advanced battery technology and software development. It supports customers throughout the battery lifecycle, from research and development to production readiness and data-driven optimization.