Backend Developer (f / m / x) Data & Database

Hamburg Hybrid (2–3 days / week onsite) | 30 Days Vacation | English B2

Are you enthusiastic about intelligent and effective software solutions to the energy transition?

Join us at suena energy as Senior Backend Engineer (f / m / x) and become a core member of our new platform team. Shape and scale our data infrastructure for the next generation of energy trading—enabling seamless analytics, high-performance databases, and integrations for the future of clean energy.

suena energy is a green tech startup specializing in algorithmic energy trading for energy storage systems and renewables.

Our vision : a world where clean energy is used reliably, economically, and intelligently. Our AI-powered software maximizes the revenues of large-scale energy storage and renewable assets on European short-term power markets—while minimizing risk.

We're a team of 38 people, combining a warm, supportive team culture with true startup drive. Following our successful Series A, we're now building a dedicated platform integration team from scratch - relieving our modeling and data science teams from operational bottlenecks. As one of the first Senior Engineers (f / m / x), you'll have real ownership, direct impact, and the chance to shape our technical standards and team culture.

Quick Check : Is this your next Engineering Playground?

• Tech Stack : Python (Django / FastAPI), SQL & NoSQL (PostgreSQL, TimescaleDB, DynamoDB, Redis), data lakes / warehouses, Celery, Docker, AWS, GitLab CI / CD, Sentry, Grafana
• Your Focus : Data modelling, database architecture, time-series data, ETL pipelines, performance, scalability, data integration improvements, automations, legacy improvements
• Team : Newly formed platform squad with two Senior Engineers (one API, one Data / DB), one Junior Engineer, and a Modelling expert transitioning from the Modelling team, direct CTO access, collaborative culture, async-friendly, regular pair programming
• Product : Advanced energy trading & optimization platform, real-time APIs, heavy data flows, ML integrations, high complexity
• Who thrives here : Senior backend engineers with broad experience in SQL & NoSQL, data management tools, and scalable data architectures - ready to drive innovation
• Must-haves : 5+ years backend, hands-on with SQL & NoSQL databases, experience with data management tools (data lakes / warehouses), ETL / data pipelines, performance tuning for large datasets, cloud deployment
• Dealbreakers : No cloud / database experience, no broader data stack, no coding experience, desire to work fully solo

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