Middle Data Engineer

GR8_TECH; Polska; Hybrid; PLN 180,000 - 260,000; Full time

Benefits offered by this job

Sports

Medical

Mental health

Home office

Languages

Maternity/Paternity leave with childca

20+ vacation days

Remote-first

Tech support

Coworking compensation

Team events

Learning culture

Job summary

GR8_TECH is building a scalable data platform powering real-time analytics for iGaming operators. You will design robust ingestion pipelines, model semantic layers, and maintain governance across the platform to deliver zero-latency business insights.

Join a remote-first team driving architecture, data modeling, and end-to-end data solutions using modern stacks like Parquet/AVRO, PostgreSQL, ClickHouse, and cloud services.

Qualifications

• 3+ years of production experience in Data Engineering, Software Engineering, or related distributed data systems.
• Strong SQL and database expertise: PostgreSQL and modern analytical warehouses.
• Experience orchestrating distributed jobs (Spark, Trino, Flink) and streaming (Kafka, Kinesis).
• Proficient in Python for data applications, pipelines, and REST APIs.
• Linux, Docker, and CI/CD literacy; Git version control.
• Data quality discipline: automated testing, schema validation, observability.

Responsibilities

• Design scalable data transformation layers and production-grade data marts.
• Build semantic layer models with consistent metrics across reports.
• Create ingestion pipelines from internal services and external streams (Kafka, Kinesis).
• Automate data quality tests to catch pipeline breaks and schema drift.
• Expose data via REST APIs and enforce access controls (RBAC, RLS).
• Drive CI/CD and containerized deployments across cloud infra.

Skills

SQL & PostgreSQL

Python

Distributed compute

Spark

Trino

Flink

Docker

CI/CD

REST APIs

Linux

Data quality

Education

Degree in CS / CE / equivalent

Tools

Docker

GitLab CI

Terraform

BigQuery

ClickHouse

PostgreSQL

Job description

GR8_TECH builds B2B iGaming platforms for operators who play to lead.

We deliver full-cycle, high-impact tech designed to scale — from seamless integrations and expert consulting to long-term operational support. Our platform powers millions of active players and drives real business growth. Call it what it is: the iGaming Platform for Champions.

With 1000+ GR8 people across locations and time zones, we don’t just ship technology — we help operators build success stories across brands, markets, and geos.

Our ambition drives us. Our people make it real.

If you're a challenger in spirit and a champion in action — join us.

Why this role exists:

This role exists to scale and stabilize the core data infrastructure powering our real-time analytics and decision systems. You’ll help us deliver accurate, zero-latency business insights by designing robust ingestion pipelines, building clean semantic models, and maintaining rock-solid data governance across the platform.

What you’ll drive:

Architecture & Data Modeling

• Design and implement scalable data transformation layers, organizing raw data into validated, production-grade data marts.

• Build and optimize semantic layer models, ensuring consistent metrics and definitions across all reporting surfaces.

• Establish data modeling standards utilizing optimal storage formats (Parquet, ORC, AVRO) and storage engines (PostgreSQL, ClickHouse, Redshift/BigQuery).

Pipeline Delivery & Execution

• Ship and maintain end-to-end data ingestion pipelines integrating internal services and third-party event streams (Kafka, Kinesis, external APIs).

• Automate data quality and integrity testing to catch pipeline breaks and silent schema drifts before they reach downstream consumers.

• Tune query performance and pipeline bottlenecks, actively managing indexing, data partitioning, and job scheduling.

Platform Operations & Integration

• Expose data-centric services by building and managing performant REST APIs using modern frameworks (FastAPI, Flask, or Aiohttp).

• Enforce granular access control across our data layers via RBAC, row-level security (RLS), and column-level masking.

• Automate CI/CD workflows and deployments using Docker, GitLab CI, and Terraform across our cloud infrastructure.

Engineering Quality & Cross-Team Alignment

• Partner with product managers, software engineers, and analysts to translate business logic into maintainable technical requirements.

• Participate in thorough code and architecture reviews, upholding strict testing standards (unit, integration, TDD/BDD).

• Document system designs and data catalog schemas, making data discoverable and self-serve across the organization.

What makes you a GR8 fit:

Must-have

• 3+ years of production experience in Data Engineering, Software Engineering, or related distributed data systems.

• Proven SQL & Database expertise: Strong hands-on work with relational databases (PostgreSQL) and modern analytical/columnar data warehouses (ClickHouse, BigQuery, or Redshift).

• Demonstrated pipeline & distributed compute skills: Practical experience orchestrating distributed jobs (Spark, Trino, Flink) and handling event streaming engines (Kafka, RabbitMQ, or Kinesis).

• Solid software engineering foundations: Proficient in writing clean, modular Python for data applications, pipeline orchestration, and REST APIs.

• Linux, Container, & CI/CD literacy: Comfortable writing Dockerfiles, configuring CI/CD pipelines (GitLab CI, GitHub Actions), and utilizing Git version control.

• Data quality discipline: Direct experience implementing automated data testing, schema validation, and pipeline observability.

Nice-to-have

• Hands-on experience with Infrastructure as Code (Terraform) and AWS cloud services.

• Practical exposure to metadata management tools (DataHub, OpenMetadata).

• Understanding of resilience patterns in distributed systems (circuit breakers, rate limiting, connection pooling).

• Degree in Computer Science, Software Engineering, or equivalent practical experience.

Why you'll love working here:

Benefits Cafeteria — annual budget you allocate to:

• Sports
• Medical
• Mental health
• Home office
• Languages.

Work-life & support

• Paid maternity/paternity leave + monthly childcare allowance.

• 20+ vacation days, unlimited sick leave, emergency time off.

• Remote-first + tech support + coworking compensation.

• Team events (online/offline/offsite).

• Learning culture with internal courses + growth programs.

Our culture & core values:

GR8_TECH culture is how we win — through trust, ownership, and a growth mindset. We move fast, stay curious, and keep it real, with open feedback, room to experiment, and a team that’s got your back.

FUELLED BY TRUST: we're open, honest, and have each other's backs.

OWN YOUR GAME: we take initiative and own what we do.

ACCELER8: we move fast, focus smart, and keep it simple.

CHALLENGE ACCEPTED: we grow through challenges and stay curious.

BULLETPROOF: we're resilient, ready, and always have a plan.