Data Engineer for telecom connectivity in Berlin

Описание

1GLOBAL is a global mobile communications provider delivering connectivity solutions to enterprises and consumers. It operates regulated telecommunications and mobile virtual network services across multiple countries, supported by a global mobile core network, eSIM technology, and telecom licenses.

Задачи

• Develop and implement data models across raw and curated layers
• Create and optimize ETL/ELT pipelines ingesting data from billing, CRM, network, product, and support systems into an S3-based data lake
• Consume Kafka topics and build reliable logic for late, duplicate, and out-of-order events
• Own dbt data transformations, including tests and documentation
• Orchestrate and monitor Airflow pipelines, including retries, alerting, backfills, and SLAs
• Write efficient SQL for transformation logic and ad-hoc investigations
• Contribute to data quality checks covering completeness, freshness, and source reconciliation
• Flag anomalies before they reach reporting
• Collaborate with team members to ensure smooth development processes and shared understanding
• Take ownership of work quality and end-to-end outcomes
• Create and maintain accurate technical documentation
• Contribute to team discussions and continuous improvement

Требования

• 3–5 Years of hands‑on data engineering experience
• Strong SQL skills, including window functions, CTEs, and query optimization
• Experience building and maintaining data pipelines with AWS S3, Glue, and Athena, or a closely comparable lake/warehouse stack
• Practical understanding of data modelling, including raw‑to‑conformed layers and dimensional modelling basics
• Experience consuming Kafka or another streaming/message system as a data source
• Advanced Python proficiency for ETL development, data manipulation, and system automation
• Strong communication skills
• Nice to have: Airflow, dbt, Apache Iceberg or other open table formats, experience in telecom or another high‑volume regulated data environment such as finance or healthcare

Условия

• Opportunities for career growth in a fast-growing telecommunications company
• Exposure to major transactions affecting the telco industry
• Collaboration with experienced leaders, founders, senior management, and external advisors
• Professional development alongside industry experts
• Opportunities to work in different 1GLOBAL offices worldwide
• Collaborative, dynamic, and international work environment
• Equal opportunity employment and a diversity-focused culture