About the role

We are hiring a Senior Data Engineer to join our team in Madrid (remote-friendly across Spain). You will be embedded with a major telecom operator, designing and building the data platforms that power their OSS/BSS (Operations and Business Support Systems). This is a role for an experienced data engineer who understands the unique challenges of telecommunications data — high volumes, complex network topologies, and the need for real-time observability.

What you will do

• Design, build, and maintain data pipelines that underpin OSS/BSS platforms for a leading telecom operator.
• Integrate and transform network, service, and customer data across diverse source systems using Python, SQL, and modern ETL/ELT frameworks.
• Partner with network engineering and product teams to translate complex telecom data requirements into reliable, scalable solutions.
• Improve data observability, lineage, and governance across the telecom data estate.
• Contribute to platform architecture decisions around data storage, processing, and delivery patterns.

What we are looking for

• 7+ years in data engineering roles, with strong experience in the telecom or utilities sector.
• Solid understanding of OSS/BSS concepts — inventory management, service assurance, network monitoring, fault management, and billing systems.
• Strong SQL, Python, and data modelling skills with experience designing warehouse and lakehouse schemas.
• Hands-on experience with ETL/ELT frameworks and cloud-native data platforms (GCP, AWS, or Azure).
• Comfortable working with large-scale, event-driven data architectures and batch/streaming hybrid patterns.

Nice to have

• Hands-on experience with telecom data standards (TM Forum Open APIs, 3GPP, SNMP/MIB).
• Experience with real-time streaming technologies (Kafka, Google Pub/Sub) for network event processing.
• Familiarity with infrastructure-as-code (Terraform, Pulumi) and CI/CD for data pipelines.
• Knowledge of FinOps or cloud cost optimisation for data workloads.

About Irysan

Irysan is a technology consultancy with offices in London and Madrid, specialising in team augmentation, embedded delivery, and nearshore engineering. We partner with organisations like Vogue, OVO Energy, FutureLearn, and The Raspberry Pi Foundation. We hire for attitude first — if you are curious, collaborative, and care about doing things right, we would love to hear from you.

Benefits and perks

• Flexible and remote-friendly working — based in Madrid or anywhere in Spain.
• Competitive salary with regular reviews.
• Learning and development budget for conferences, courses, and certifications.
• Wellbeing-first culture with a sustainable pace of work.
• Opportunity to work at the intersection of telecoms and modern data engineering.