Principal Data Platform Engineer (Swedish Ad Platform)

Principal Hybrid Remote

Europe, Albania, Poland, Romania, Ukraine

Engineering, AI Engineering, Data Engineering, Software Development, Python

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About the Position

Join a greenfield initiative focused on building a next-generation AI-first data platform for a global AdTech ecosystem. We are looking for a Principal/Staff Data Platform Engineer who will drive architectural decisions, establish engineering standards, and shape the foundation for scalable analytics and AI capabilities.

As part of Sigma Software, you will collaborate with experienced engineering teams and contribute to a platform designed around immutable event-driven architecture, governed data contracts, and modern lakehouse principles. This role is ideal for a Principal-level engineer who enjoys solving complex distributed systems challenges and influencing platform strategy from day one.

We offer the opportunity to work on large-scale international products, collaborate with highly skilled professionals, and contribute to a technically ambitious environment with long-term growth potential.

Responsibilities

• Lead the technical design and architecture of a modern enterprise-scale data platform
• Define scalable data flows from Iceberg-based event storage into analytical and operational data products
• Evaluate and select technologies for orchestration, transformation, querying, serving, and storage
• Design reusable canonical entities and data models across advertising, campaigns, inventory, billing, and customer domains
• Establish scalable engineering patterns for batch and near-real-time processing
• Build reliable and observable data pipelines for high-volume AdTech workloads
• Implement data quality, lineage, observability, and reconciliation capabilities
• Collaborate with Platform Engineering teams to introduce CI-enforced data contracts and governance standards
• Define tenant isolation, access control, and regional data boundary strategies
• Establish standards for testing, deployment automation, schema evolution, and versioning
• Optimize platform performance, scalability, and infrastructure costs
• Mentor engineers and contribute to engineering excellence across the team
• Partner closely with leadership and cross-functional stakeholders

Requirements

• 8+ years of experience designing and operating production-grade data platforms
• Strong expertise in distributed data systems and high-volume event-driven architectures
• Deep understanding of modern lakehouse architectures and Apache Iceberg
• Advanced SQL skills and production experience with Python, Java, Scala, or similar languages
• Experience with distributed processing and query technologies such as Spark, Flink, or Trino
• Strong knowledge of data modeling, partitioning strategies, and performance optimization
• Proven experience building batch and near-real-time data pipelines
• Hands-on experience with AWS cloud infrastructure
• Strong understanding of CI/CD pipelines, Infrastructure as Code, and production observability
• Experience implementing data contracts, schema evolution, and data quality frameworks
• Ability to make pragmatic architectural decisions in greenfield environments
• Upper-Intermediate or higher English level
• Strong communication and technical leadership skills

WILL BE A PLUS

• Experience in AdTech or other high-volume event-processing domains
• Experience designing multi-tenant SaaS data architectures
• Familiarity with semantic layer technologies
• Experience supporting both analytics and ML/AI workloads
• Understanding of privacy regulations and data residency requirements

We Offer

• Різноманітність доменів та бізнесу
• Великий вибір технологій
• Медична та юридична підтримка
• Круте та живе ком'юніті професiоналiв
• Безперервна освіта та можливість росту
• Гнучкий графік
• Віддалена робота
• Стильний та комфортний офіс (для твого комфорту вибору звідки працювати)
• Спортивні заходи та спільноти

About the Company

Our Customer is a Sweden-based AdTech company specializing in advanced self-serve advertising platforms that automate direct transactions between advertisers and major global publishers. Their solutions improve transparency and operational efficiency in digital advertising and are trusted by globally recognized brands including TripAdvisor, Bloomberg, The Washington Post, Opera, and Dow Jones. The company processes millions of advertising transactions worldwide and is actively investing in AI-driven data capabilities.

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