CRAFTSMAN+

Senior Data Engineer – AI Platform

CRAFTSMAN+

full-time

Posted on:

Location Type: Remote

Location: Poland

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Job Level

Senior

Tech Stack

AirflowApolloAWSDockerDynamoDBETLGraphQLKafkaPandasPostgresPythonSDLCSQLTerraform

About the role

  • Integrate large language models into production AI agent workflows - building structured-output pipelines with grounding, reference resolution, and evidence traceability.
  • Design and evolve APIs that serve risk Intelligence data to customers and external integrations.
  • Build and maintain data ingestion pipelines - owning the full lifecycle from extraction through loading and error handling.
  • Own reliability of async task processing systems — health monitoring, autoscaling, alerting, and incident response.
  • Build and maintain shared libraries and internal developer tooling that accelerate the entire engineering team.
  • Manage full service lifecycle — from standing up new services to decommissioning legacy ones.

Requirements

  • 4+ years of experience in Data Engineering or Backend Engineering with a strong data focus.
  • 4+ years of production Python experience - you write clean, testable, well-structured code.
  • Experience designing and building APIs (preferably GraphQL with Apollo Federation).
  • Experience in developing, maintaining, and ensuring the reliability, scalability, fault tolerance, and observability of data services in a production environment.
  • Have fundamental knowledge of data engineering techniques: ETL/ELT, batch and streaming, DWH, Data Lakes, distributed processing.
  • Comfortable with async Python patterns (asyncio, Celery, task queues).
  • Strong knowledge of SDLC and solid software engineering practices.
  • Familiar with infrastructure-as-code approach.
  • Demonstrated curiosity through asking questions, digging into new technologies, and always trying to grow.
  • Strong problem solving and the ability to communicate ideas effectively.
  • Self-starter, independent, likes to take initiative.
  • Familiarity with at least some of the technologies in our current stack: Core: Python, Pandas, Polars, Celery, SQL (PostgreSQL), SQLAlchemy, Airflow, Docker, Kafka; AI/ML: OpenAI, Anthropic, Google Vertex AI, Pydantic (v2), Pydantic AI, MLflow; APIs: GraphQL (Strawberry); AWS: S3, Batch, RDS, DynamoDB, ECS, SQS, DMS, Lambda; Infra & Ops: Terraform, Datadog.
  • Experience with or strong interest in AI-native development workflows (we use Claude Code as a core part of how we build software - from building internal tooling skills to debugging production issues.
Benefits
  • Option to work as a **B2B contractor** or **full-time employee**
  • **Competitive salary** at a well-funded, fast-growing startup
  • **PTO days** so you can take the time you need to refresh!
  • Full-time employees: 28 PTO days allotted + paid public holidays
  • B2B contractors: 15 PTO days allotted + paid public holidays
  • **100% remote** work (or hybrid if you prefer! We have coworking space in center of Warsaw.)
Applicant Tracking System Keywords

Tip: use these terms in your resume and cover letter to boost ATS matches.

Hard Skills & Tools
PythonAPIsETLELTdata engineeringasync PythonSDLCdata servicesGraphQLinfrastructure-as-code
Soft Skills
problem solvingcommunicationself-starterindependencecuriosityinitiative