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Jani Z.JZ

Jani Z.

Power BI Expert | SQL, DAX & BI automation

โ‚ฌ450/day
Ljubljana, SI
8-15 years

Average response time: 1 hour

About Jani

๐— ๐—ผ๐˜€๐˜ ๐—ฐ๐—ผ๐—บ๐—ฝ๐—ฎ๐—ป๐—ถ๐—ฒ๐˜€ ๐—ฑ๐—ผ๐—ปโ€™๐˜ ๐—ต๐—ฎ๐˜ƒ๐—ฒ ๐—ฎ ๐—ฑ๐—ฎ๐˜๐—ฎ ๐—ฝ๐—ฟ๐—ผ๐—ฏ๐—น๐—ฒ๐—บ.

They have dashboards, reports, Excel files, ERP exports, and plenty of numbers.

But when it matters, leadership still asks:
โ€œWhich number is correct?โ€
โ€œWhy does finance show something different than sales?โ€
โ€œCan we trust this report?โ€

I help companies turn scattered reporting and unclear data structures into reliable analytics systems used for business decisions.

My work sits between ๐—ฏ๐˜‚๐˜€๐—ถ๐—ป๐—ฒ๐˜€๐˜€, ๐—•๐—œ, ๐—ฎ๐—ป๐—ฑ ๐—บ๐—ผ๐—ฑ๐—ฒ๐—ฟ๐—ป ๐—ฑ๐—ฎ๐˜๐—ฎ ๐—ฝ๐—น๐—ฎ๐˜๐—ณ๐—ผ๐—ฟ๐—บ๐˜€:
โ€ข SQL-based analytical models and reporting layers
โ€ข Power BI / Fabric semantic models and dashboards
โ€ข Databricks, Snowflake, Azure, and DWH/lakehouse environments
โ€ข KPI definition, metric alignment, and data governance
โ€ข ETL/ELT workflows, reporting automation, and self-service analytics
โ€ข stakeholder requirements, rollout, and adoption

Iโ€™ve worked across finance, FMCG, logistics, telecom, media, and enterprise environments, delivering BI/data solutions for companies such as Raiffeisen Bank, Generali, NLB, McDonaldโ€™s, Heineken Group, Tamedia Group, DARS, Celtra, and others.

Iโ€™m a good fit when a company needs someone who can connect technical data work with business use: clarify the real question, structure the data, define the metrics, build the reporting layer, and make sure people actually use it.

Currently open to:
โ€ข remote senior BI / analytics engineering roles
โ€ข freelance BI consulting and advisory work
โ€ข Power BI / semantic model / data platform projects
โ€ข analytics roadmap, KPI alignment, and BI audit work
Message me here on LinkedIn if youโ€™re looking for someone to help make reporting more reliable, useful, and decision-ready.
  • English

    Fluent

  • Italian

    Fluent

  • Slovenian

    Native or bilingual

Can work on-site
Ljubljana (up to 50km)

Experience

  • Trilogy International
    Senior Data Consultant
    November 2022 - Today (3 years and 7 months)
    Frankfurt, Germany
    - Designed SQL-based analytical models and reporting layers across DWH/lakehouse environments, including Databricks SQL, supporting downstream BI and self-service analytics
    - Built and optimized Power BI / Fabric semantic models and dashboards, including DAX, refresh workflows, and performance tuning
    - Developed ETL/ELT transformations and automated workflows to improve reporting reliability and reduce manual effort
    - Translated business requirements into scalable analytics solutions, aligning data, IT, and business stakeholders
    - Documented metric definitions, reporting logic, and data model structures to support governance, handover, and reliable self-service analytics
    Microsoft Power BI Azure Databricks Oracle
  • Celtra Inc,
    Lead Data Scientist/Analyst
    March 2021 - October 2022 (1 year and 7 months)
    Ljubljana, Slovenia
    - Led company-wide BI transformation, establishing a centralized reporting layer and enabling self-service analytics
    - Aligned core business metrics improving decision-making across teams
    - Built a centralized BI platform with 70%+ adoption
    - Partnered with product and business teams to deliver analytics, supporting product, and revenue decisons
    - Managed stakeholder priorities across teams, ensuring delivery of high-impact initiatives
  • BE-terna,
    Senior BI Architect & Consultant
    June 2020 - February 2021 (8 months)
    Ljubljana, Slovenia
    - Led BI architecture and delivery across multiple client engagements
    - Guided clients from fragmented a unified BI ecosystems
    - Standardized BI solutions and templates, accelerating rollout and improving consistency across projects and implementation time
    - Acted as senior point of contact, shaping analytics requirements and solution direction

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Education

  • Bachelor of Computer Science
    University of Primorska
    2012
    Bachelor of Computer Science
  • Microsoft Exam 778: Analyzing and Visualizing Data with Power BI Mastering Tabular Course
    Group
    Microsoft Exam 778: Analyzing and Visualizing Data with Power BI Mastering Tabular Course

Skill set

Categories