Data Engineer

• Develop & Scale Pipelines: You design and implement robust ETL/ELT pipelines to process large, complex volumes of data (Big Data) using both code-based and visual tools.
• Semantic Data Modeling: You translate complex business processes into logical data models and help build a centralized, cross-departmental enterprise data model.
• Data Quality & Lineage: You implement automated quality checks and monitor data flows from source to end product to guarantee seamless data lineage.
• Code & Transformation: You write clean, high-performance code in PySpark and SQL to clean, aggregate, and prepare data for downstream analysis.
• Cross-Functional Collaboration: You work closely with Data Scientists, Business Analysts, and business departments to quickly translate their requirements into production-ready data structures.
• Initial practical experience in Data Engineering (as a Junior, e.g., through relevant internships/working student roles; as a Mid-Level, approx. 1–3 years of professional experience).
• Solid knowledge of Python (especially in a Big Data context with PySpark) as well as proficiency in writing complex SQL queries.
• Good understanding of modern data architectures (Data Lakehouse, distributed systems) and ideally experience with integrated all-in-one data platforms.
• Familiar with relational and non-relational databases. You enjoy bringing order to unstructured mountains of data.
• Analytical mindset, work in a structured manner, and possess a strong willingness to learn, allowing you to quickly adapt to new, complex software ecosystems.
• Start date : September
• Location : Zurich - CH
• Duration : permanent contract
• Language : fluent in English, German is a plus

Who are we? The SII Group is at the heart of innovation, serving major accounts in a variety of engineering sectors. In 2026, for the ninth consecutive year, SII France was awarded the Great Place To Work® label.

This success reflects our culture, which is based on our desire to offer all our employees a fulfilling working environment in which they can develop their skills and careers.

Joining SII means embarking on a collective adventure: Let's Tech Together! This promise represents our shared ambition: to build a technological future together, in an environment where experimentation and autonomy are encouraged, where innovation is at the heart of everything we do, and where every employee finds professional fulfilment and empowerment within an enthusiastic and inclusive team.

As a company with strong human values, we are signatories to the LGBT+ Commitment Charter with the Association l'autre Cercle and are a disability-friendly company.

Let's Tech Together embodies who we are and what we aspire to be: a dynamic, innovative and people-oriented company. So if these values resonate with you, join us!