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Junior Backend Engineer (Platform, API & Data)

Confidential company · Hamburg · Posted Jul 23, 2026

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Public summary

Join a green tech startup in Hamburg specializing in algorithmic energy trading for renewables and storage systems. This junior backend engineering role focuses on developing API and data-driven backend systems using Python and related technologies. The position offers a hybrid working model, 30 days vacation, and opportunities for learning and growth within a collaborative, international team, focused on sustainable energy solutions and advanced technology platforms.

Location and work setup

Location
Hamburg
Remote status
Hybrid
German requirement signal
Unclear
Detected job language
English

Salary

EUR 55000.00 - 60000.00 annual

Responsibilities

Collaborate with senior engineers to design, build, and optimize backend features and APIs. Develop and maintain databases, data pipelines, and real-time integrations. Automate workflows to enhance reliability, scalability, and security of the platform. Work closely with data science and product teams to deliver energy trading and analytics features. Contribute improvements for greenfield and legacy systems. Participate in code reviews, pair programming, and team feedback sessions.

Qualifications

1 to 3 years of backend development experience, primarily in Python (Django or FastAPI preferred). Hands-on experience with SQL databases such as PostgreSQL and interest in data-driven products. Eagerness to learn API design, event-driven systems, and cloud technologies like AWS and Docker. Collaborative mindset with good English communication skills (B2 level or higher). Previous experience in international or cross-functional teams is a plus. Must be willing to learn both API and data/backend engineering topics.

Skills

Python Django FastAPI SQL PostgreSQL API design AWS Docker CI/CD Redis Celery GitLab CI/CD Sentry Grafana Data pipelines Real-time integrations