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About the Role
Develop and implement data models, create and optimize ETL/ELT pipelines, consume from and build reliable logic around Kafka topics, own data transformations in dbt, orchestrate and monitor pipelines in Airflow, write efficient SQL, contribute to data quality checks, collaborate with team members, take ownership of work quality, create and maintain technical documentation, and actively contribute to team discussions.
Responsibilities
- Develop and implement data models, ensuring data accuracy, consistency, and reliability across raw and curated layers
- Create and optimize ETL/ELT pipelines that ingest data from source systems (billing, CRM, network, product, support) into our S3-based data lake
- Consume from and build reliable logic around Kafka topics, handling late, duplicate, or out-of-order events as they arrive
- Own data transformations in dbt, with tests and documentation so trust in the numbers is built in, not bolted on
- Orchestrate and monitor pipelines in Airflow, including retries, alerting, backfills, and SLAs
- Write efficient, well-structured SQL for transformation logic and ad-hoc investigation
- Contribute to data quality checks — completeness, freshness, reconciliation against source — and flag anomalies before they reach reporting
- Collaborate with team members to ensure smooth development processes and shared understanding.
- Take ownership of the quality and outcomes of your work, ensuring fully functional end-to-end flows.
- Create and maintain accurate, up-to-date technical documentation.
- Actively contribute to team discussions, with a mindset for continuous improvement and openness to new ideas or technologies.
Requirements
- 3-5 years of hands-on data engineering experience
- Strong SQL — comfortable with window functions, CTEs, query optimization
- Solid experience building and maintaining data pipelines on AWS S3, Glue, and Athena (or a closely comparable lake/warehouse stack — e.g. Spark + Hive/EMR, BigQuery, Redshift, Snowflake, Exasol — if you know the S3/Glue/Athena equivalents well)
- Practical understanding of data modelling: raw → conformed layers, dimensional modelling basics, thinking about how a table will actually be queried
- Experience consuming from Kafka (or another streaming/message system) as a data source
- Advanced proficiency in Python for ETL development, data manipulation and system automation
- Strong communication skills
Skills
- SQL
- AWS S3
- AWS Glue
- AWS Athena
- Spark
- Hive
- EMR
- BigQuery
- Redshift
- Snowflake
- Exasol
- Kafka
- Python
- Airflow
- dbt
- Apache Iceberg
Location
- Lisbon
- Berlin
- São Paulo
Work Type
- Full-time
Experience Level
- 3-5 years
Benefits
- Growth Opportunities
- Major Transaction Exposure
- Work with a Talented Team
- Dynamic Work Environment
- Professional Development
- International Experience
- Open Communication Culture
- Get Things Done Attitude
About the Company
- 1GLOBAL is a technology-driven global mobile communications provider, delivering global connectivity solutions to enterprises and consumers.
- Powered by a best-in-class telecom platform with its own owned and operated global mobile core network in 15 countries, fully fledged in-house developed eSIM technology, and an extensive portfolio of telecom licenses; 1GLOBAL operates as a fully regulated telecommunications provider across 43 countries worldwide.
- The company serves many of the world’s leading banks, multinational enterprises, global retailers and digital-first businesses, including neo-banks, global fast moving consumer goods companies, travel leaders, and payment service providers.
- Today, 1GLOBAL connects more than 80 million people and devices globally, enabling our customers to launch, scale, and innovate with confidence in the mobile ecosystem.
- 1GLOBAL is a profitable, fast-growing business. With full-year revenues in 2025 exceeding US$200 million and profits of over US$25 million, we generate strong cash flows to fund our growth allowing us to continuously invest in infrastructure, platform innovation, and global expansion.
- In 2026 also the parent of the Lidl Group acquired a 10% interest in 1GLOBAL as part of a deal for Lidl to offer globally to its 180 million consumers communication services.
- Recent years have marked a defining phase in 1GLOBAL’s journey, with major enterprise and mass-consumer client wins accelerating its evolution into a global mobile connectivity powerhouse, purpose-built to enable consumer brands to enter and succeed with their own aspirations to offer telecommunications services to their clients.
- Founded in 2022 by experienced technology entrepreneurs, Hakan Koç and Pyrros Koussios, 1GLOBAL has rapidly emerged as a European technology leader shaping the future of global telecommunications.
- It operates as a fully regulated Mobile Virtual Network Operator (MVNO) in 15 countries and as a regulated telecom operator in an additional 28 markets.
- Headquartered in the Netherlands, with world-class R&D hubs in Lisbon, Berlin, and São Paulo, its team of close to 550 experts across 16 countries is united by a single ambition: to redefine global mobile connectivity through technology, scale, and execution excellence.
Equal Opportunity
- 1GLOBAL is an equal opportunity employer, we value your character as much as your talent. Diversity drives our innovation, and we offer a collaborative, dynamic, and international work environment. We are excited for you to join our mission to revolutionise connectivity globally.