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Sii Sp. z o.o.

Senior ETL Developer (f/m/x)

Sii Sp. z o.o. Show all offers
B2B
Hybrid
Senior
Poznań
Wrocław
Lublin
Rzeszów
+10
Expires Nov 14, 2026
8 days ago

In short

Senior ETL Developer role with Sii Sp. z o.o. in Poznań. Responsibilities include designing data platforms, optimizing PostgreSQL, implementing ETL, and collaborating with teams. Requires 5+ years PostgreSQL, SQL, PL/pgSQL, performance tuning, ETL, and Linux knowledge. Offers stability, profit sharing, benefits, and remote/hybrid options.

Keywords

PostgreSQL Python ETL SQL PL/pgSQL Database Performance Tuning Linux

AI-written summary based on the listing content.

Technologies we use

About the project

Your responsibilities

  • Designing and developing high-performance data platforms using PostgreSQL and Python
  • Maintaining and optimizing database performance for large data volumes
  • Implementing ETL processes to ensure efficient data integration and transformation
  • Collaborating with cross-functional teams to support real-time data access and processing
  • Monitoring system performance and implementing necessary adjustments for scalability
  • Creating and managing database models, including normalization and denormalization
  • Utilizing PL/pgSQL for writing procedures, functions, and triggers
  • Ensuring data integrity and implementing archiving strategies for data retention

Our requirements

  • Minimum 5 years of experience working with PostgreSQL
  • Strong command of SQL and data modeling techniques
  • Hands-on mastery of PL/pgSQL, including procedures and triggers
  • Practical experience with database performance tuning and optimization
  • Experience in ETL integration and working with large data volumes
  • Familiarity with the Linux environment
  • Advanced level of Polish and English
  • Residency in Poland

Optional

  • Experience with Apache Kafka or RabbitMQ
  • Knowledge of Apache Airflow and CI/CD practices
  • Background in the banking or financial sector

What we offer

  • Great Place to Work since 2015 - it’s thanks to feedback from our workers that we get this special title and constantly implement new ideas
  • Employment stability - revenue of PLN 2.1BN, no debts, since 2006 on the market
  • We share the profit with Workers - over PLN 76M has already been allocated for this aim since 2022
  • Attractive benefits package - private healthcare, benefits cafeteria platform, car discounts and more
  • Comfortable workplace – class A offices or remote work
  • Dozens of fascinating projects for prestigious brands from all over the world – you can change them thanks to Job Changer application
  • PLN 1 000 000 per year for your ideas - with this amount, we support the passions and voluntary actions of our workers
  • Investment in your growth – meetups, webinars, training platform and technology blog – you choose
  • Fantastic atmosphere created by all Sii Power People
Published 2026-10-15
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