Full-Stack Engineer - Data Engineering & AI

Hays IT Contracting is a cooperation based on B2B rules. We connect IT specialists with the most interesting, technological projects on the market.

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For our Client we are currently looking for Candidates for the position of:

Full-Stack Engineer (Data Engineering & AI)

Location: remote

Job type: B2B (with Hays Poland)

Length: long-term cooperation

Rate: 150-250zł/h net on B2B

Start date: ASAP

Working hours: business hours

Methodology: Scrum

Requirements:

• We're looking for genuine production depth across data engineering and full-stack development — not surface familiarity with either. 
• Data Engineering Foundation 
• Data modeling and schema design — dimensional modeling, normalization trade-offs, and EDW/warehouse schema design you can defend. 
• Hands-on data pipeline experience — ETL/ELT design across batch and incremental loads, built and maintained in production (not just SQL scripts on a schedule). 
• Slowly Changing Dimensions (SCD) and change-data handling — knows the patterns and when each applies. 
• dbt Experience— modular SQL transformations, tests, documentation, and incremental strategies. 
• Advanced SQL and at least one modern data platform in depth (e.g., Snowflake, Databricks, or a comparable cloud warehouse/lakehouse). 
• Data quality thinking — testing, validation, and lineage treated as first-class, not afterthoughts. 
• Full-Stack AI Product Development 
• Python as a primary language — services, automation, and data work alike. 
• FastAPI — async REST API design, dependency injection, testing. 
• A modern frontend, ideally Next.js — component architecture, SSR, state management, and real UX sensibility. 
• PostgreSQL — schema design, query optimization, indexing. 
• System design — can architect from a blank page: services, boundaries, trade-offs, and scale. 
• AI-paired engineering — uses an agentic coding tool (Claude Code, Cursor, or comparable) as a genuine daily workflow accelerator and can speak concretely to how. 
• CI/CD and cloud deployment ownership on AWS or Azure, without heavy support. 
  
   

Key Responsibilities

• Own work end to end — from discovery and solution shaping through system design, build, and production deployment. 
• Design and build the data foundation: data models, schema design, dimensional modeling, ETL/ELT pipelines, and slowly changing dimensions (SCD) that hold up in production. 
• Build full-stack applications on top of that foundation — Python/FastAPI services and Next.js frontends that make data and AI workflows usable. 
• Use AI coding agents (Claude Code or equivalent) as a primary build accelerator to move from spec to working software quickly, without sacrificing judgment or quality. 
• Design and build AI capabilities where they fit — RAG pipelines, agentic workflows, and LLM-in-the-loop processing — and compose them via MCP servers, Skills, and Plugins. 
• Orchestrate pipelines and automation with tools like Airflow, Dagster/Prefect, Celery, or Temporal — choosing the right tool for the job. 
• Stand up and own CI/CD and cloud deployments on AWS and Azure. 
• Translate ambiguous client requirements into clear designs and communicate trade-offs to both technical and business audiences. 
• Contribute reusable accelerators and technical assets back to the Data Practice

What will the recruitment process look like:

• Your CV will be verified by Hays Recruiter
• Recruiter will contact you by phone - a 15-minute conversation about the project and your experience
• Technical conversation with the client - online meeting (1h+1h)
• Offer
• Welcome to the project!

Hays Poland sp. z o.o. is an employment agency registered in a registry kept by Marshal of the Mazowieckie Voivodeship under the number 361.