Senior Data Engineer – Graph & Analytics Systems

Holisticon Insight is a division of http://nexergroup.com focused on IoT, AI, and advanced analytics. We assist our customers in developing IoT services, portals, and mobile apps and, above all, analyze data using AI and advanced analytics to reduce costs, streamline, and find new opportunities for the business. Our goal is to grow strong but rather in competencies than in numbers. We get things done and, on the way, we build a dynamic company culture to create the best place for our development. We love the atmosphere of a family business with its flat structure and self-organized teams where every opinion matters and influences our way of working

Check us out!

👇https://holisticon.pl/holisticon-insight/

We offer a B2B Contract:

• 165 – 195 PLN net/hour + VAT

We're seeking an experienced Senior Data Engineer to lead work on our client's analytics platform. You'll assist in evaluating modern database technologies and designing migration strategies that enable advanced relationship analysis and improve client's ability to track metrics across complex interconnected systems.

Responsibilities

• Design data models to represent events, entity relationships, and patterns

• Develop ETL pipelines to transform data structures

• Optimize query performance for complex relationship traversals

• Integrate new database solutions with existing analytics workflows

• Create proof-of-concept demonstrations for key use cases

• Help assessing current architecture and designing database migration strategy

• Evaluate and recommend appropriate database technologies, with focus on graph databases (Neo4j, Amazon Neptune, ArangoDB, etc.)

Key Qualifications

• 5+ years hands-on experience in similar role

• Strong understanding of data modeling and query optimization

• Experience migrating between different database paradigms (document, relational, graph)

• Proficiency with distributed data processing frameworks (Apache Spark preferred)

• Experience working with document databases (MongoDB) and JSON data structures

• Experience with large-scale analytics platforms

Nice to have:

• Experience with graph databases and graph query languages (Cypher, Gremlin)

• Knowledge of event-driven data architectures and batch processing pipelines

• Familiarity with visualization platforms (Grafana or similar)

• Experience with both batch and stream processing patterns

• Ability to evaluate trade-offs between different database technologies

• Strong communication skills to explain complex concepts to stakeholders

• Experience with hybrid architectures (combining multiple database types)

• Understanding of metrics-driven analysis and KPI tracking

By joining Holisticon Insight you will get:

• Life insurance

• Multisport card

• Fully remote job

• Private medical care

• Flexible working hours

• B2B or contract of employment

• Amazing integration events on a regular basis

• Training budget (e.g. Microsoft Azure Certifications)

• Opportunity to impact our company culture build-up

• Work equipment (laptop, 2 monitors, and accessories)