Senior Data Engineer
First seen by Alion on Oct 23, 2026.
Hybrid in Warsaw!
We’re looking for a Senior Data Engineer to join an international product company developing a complex B2B platform for enterprise customers worldwide.
You’ll build and optimize distributed data-processing systems using Java and modern data technologies, handling complex data workflows across interconnected services. This role offers end-to-end ownership, challenging performance problems, and the opportunity to influence technical decisions in a large-scale production environment.
What you’ll do:
Build scalable data pipelines and distributed processing solutions.
Develop Java services for data ingestion, transformation, and integration.
Design data models and optimize database performance for large datasets.
Improve system reliability, fault tolerance, and processing efficiency.
Troubleshoot production issues and optimize distributed workloads.
Use AI-assisted development tools to accelerate delivery while maintaining code quality.
What we’re looking for:
Strong professional Java development experience.
Deep understanding of distributed systems, concurrency, and JVM performance.
Hands-on experience building and optimizing distributed data pipelines.
2+ years of production Kafka and Apache Flink experience.
Strong knowledge of data modeling, database design, and query optimization.
Experience with messaging systems and integration between distributed services.
Ability to take ownership of complex technical challenges and production systems.
Practical experience with AI-assisted coding tools.
Nice to have: Real-time data processing, analytical databases, CI/CD, Docker, Kubernetes, TypeScript, or React.