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Jan KabelaJK

Jan Kabela

Architecture Lead & Principal Developer

€330/day
Prague, CZ
8-15 years

Average response time: 1 hour

About Jan

7+ years migrating and scaling data platforms for financial services, pharmaceutical, and QSR clients. Built
and led migrations from on-premise Oracle to AWS, unified global DWH schemas, and ran the full
architecture and delivery of McDonald’s analytics pipeline — taking it from SLA breach at 2,000 locations to
10× capacity at half the cloud cost. Comfortable owning architecture decisions end-to-end and working
directly with senior stakeholders across multiple geographies.
  • English

    Native or bilingual

  • Czech

    Native or bilingual

Remote only
Primarily works remotely

Experience

  • MBI • · McDonald's
    Architecture Lead & Principal Developer
    August 2025 - May 2026 (9 months)
    – Migrated global analytics pipeline to AWS EMR Serverless Spark + dbt; runtime 4.5 hrs → 70 min, daily cost $151 → $64 (59% down) — pipeline scaled 10× from 2k to 20k locations inside a 4-hour SLA it was previously breaching
    – 7-phase optimisation programme: SQL CTE rewrites cut Snowflake compute 98%, Spark executor tuning resolved OOM failures at scale, fact/dimension model split reduced JSON cell size 60%
    – 39 automated DQ rules in Spark with cascading exclusion logic; real-time fail-fast replacing ~1-hour Snowflake batch detection
    – ~40 AWS resources via Terraform (15 files): EMR Serverless, Lambda, 21-state Step Functions, Snowpipe, SQS, CloudWatch alarms and dashboards
    SQL Serverless Computing Database Management (e.g., SQL, NoSQL) Cloud Administration CI/CD Management
  • Biligence • · Organon / Ministry of Justice
    Data Architect
    May 2024 - July 2025 (1 year and 2 months)
    – Designed Snowflake + Collibra data governance solution for Organon post-spin-off pharma entity; built Data Quality Framework from scratch covering QA test coverage, ownership model, and governance processes
    – Ministry of Justice: full current-state architecture analysis, stakeholder requirements gathering, component and dependency mapping; designed mechanisms for elasticity, scalability, performance, reliability, and security
  • Profinit • · MSD (Merck)
    Senior Data Engineer
    January 2021 - April 2024 (3 years and 3 months)
    – Market unification: switched DWH load from per-country to per-region across 8+ markets; consolidated two globally deployed DWH schemas into one without workload disruption; consolidated and optimised Qlik QVDs
    – Full data migration: Oracle DWH, CA Automation, and manual deployments moved to Redshift, CloudBees, Jenkins; authored Airflow DAGs replacing all CA Automation orchestration
    – Japan data governance initiative: collaborated with business stakeholders to implement Collibra data quality rules; replaced manually run test suites with automated checks

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Education

  • AWS Solutions Architect Associate
    AWS Solutions Architect Associate
  • Databricks Data Engineer Associate
    Databricks Data Engineer Associate

Skill set

Categories