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Senior Data Migration Engineer (Java) @ CSHARK Sp. z o.o.
  • Wrocław
Senior Data Migration Engineer (Java) @ CSHARK Sp. z o.o.
Wrocław, Wrocław, Lower Silesian Voivodeship, Polska
CSHARK Sp. z o.o.
8. 3. 2026
Informacje o stanowisku

IN SHORT:

Remote work or on-site (Wrocław, Bielsko-Biała) – your choice!

?135 - 170 PLN/h + VAT

☑ B2B contract


Data Migration & Legacy Systems experience 

  • Proven experience with large-scale data migration projects: ETL or systems integration on enterprise-scale projects, transformation pipelines, cutover planning.
  • Experience working with XML-based data transformation (mapping files, XSLT, or equivalent config-driven ETL).
  • Proven ability to diagnose complex migration errors under time pressure: root-cause analysis, staging data fixes, re-run coordination.
  • Experience coordinating with business stakeholders during UAT and cutover; clear written and verbal communication in English.
  • Experience with legacy database analysis: reverse-engineering un(der)documented schemas, understanding data semantics and relationships without complete documentation and dealing with corrupted or ambiguous data or metadata.

Technical Skills 

  • Comfortable working with SQL at an advanced level: complex queries, schema analysis, data profiling, and diagnosing data quality issues.
  • Strong proficiency in SQL across at least two of: PostgreSQL, Oracle, SQL Server, DB2.
  • Solid Java skills (Java 21 ecosystem preferred); comfortable building and extending internal tooling - data pipelines, automation scripts, validation frameworks - with clean, testable code.
  • Familiarity with Git workflows, CI/CD pipelines, and infrastructure-as-code practices.
  • Good exposure to cloud environments, ideally AWS infrastructure and services.
  • Docker: confident setup, troubleshooting, and local environment management.

Domain & Governance 

  • Rapid domain understanding: ability to quickly absorb unfamiliar, regulated business domains.
  • Governance mindset: documenting decisions, maintaining audit trails, getting formal client sign-off.
  • Experience working with subject matter experts to define and validate data transformations and mappings.

Mindset & Working Style 

  • Ability to manage multiple concurrent workstreams.
  • Clear communicator: able to explain architectural and domain modelling decisions to both technical and non-technical stakeholders.
  • Resilient and persistent under pressure: comfortable working with tight deadlines and high client expectations.
  • Actively uses AI-assisted tools (e.g. ChatGPT, Claude, GitHub Copilot or similar) as part of daily development and problem-solving workflow - we expect AI tools to be a natural part of how you work.

Nice to Have  

  • Exposure to Smalltalk or ObjectStudio.
  • Familiarity with S3-compatible object storage, artifact lifecycle management, or observability tooling (dashboards, trend analysis).
  • Experience with cloud-native deployments on AWS; understanding of multi-tenant SaaS architectures.
  • Debt management, financial services, or accounts receivable domain experience is a significant advantage.
  • German language skills (B2+).

IN SHORT:

Remote work or on-site (Wrocław, Bielsko-Biała) – your choice!

?135 - 170 PLN/h + VAT

☑ B2B contract

,[End-to-end ownership of complex, high-stakes technical deliveries. , Direct contribution to tooling that will outlive the programme and be reused across 50+ customer migrations. , A growing role: as the programme industrializes, senior engineers are expected to mentor and technically lead parallel migration teams. , Exposure to a full modern stack (Java 21 / React / PostgreSQL / AWS) alongside legacy Smalltalk systems. , Long-term engagement with clear phase gates and the possibility to grow into a Lead Engineer role. Requirements: PostgreSQL, Java, Oracle, MS SQL, AWS

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