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I’m Giovanni Riefolo, a freelance Data & Analytics Engineer with a decade of experience building end-to-end data platforms—often as the sole senior engineer. I cover everything from ingestion and ETL to warehouse modeling, orchestration, data quality and governance, and the semantic layer that powers the dashboards and data products people actually use. Most recently, I’ve extended my platform work into AI and governed agent access to production data. I design and deliver robust pipelines, audit data models and semantic metadata to prevent silent breakages, and create practical solutions (from conversion dashboards and KPI frameworks to MCP servers and RAG pipelines) that help stakeholders move faster with confidence.…I’m Giovanni Riefolo, a freelance Data & Analytics Engineer with a decade of experience building end-to-end data platforms—often as the sole senior engineer. I cover everything from ingestion and ETL to warehouse modeling, orchestration, data quality and governance, and the semantic layer that powers the dashboards and data products people actually use. Most recently, I’ve extended my platform work into AI and governed agent access to production data. I design and deliver robust pipelines, audit data models and semantic metadata to prevent silent breakages, and create practical solutions (from conversion dashboards and KPI frameworks to MCP servers and RAG pipelines) that help stakeholders move faster with confidence.

Giovanni Riefolo

Pro

Data Analyst, Data Scientist, Data Visualizer, +6

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I’m Giovanni Riefolo, a freelance Data & Analytics Engineer with a decade of experience building end-to-end data platforms—often as the sole senior engineer. I cover everything from ingestion and ETL to warehouse modeling, orchestration, data quality and governance, and the semantic layer that powers the dashboards and data products people actually use. Most recently, I’ve extended my platform work into AI and governed agent access to production data. I design and deliver robust pipelines, audit data models and semantic metadata to prevent silent breakages, and create practical solutions (from conversion dashboards and KPI frameworks to MCP servers and RAG pipelines) that help stakeholders move faster with confidence.…I’m Giovanni Riefolo, a freelance Data & Analytics Engineer with a decade of experience building end-to-end data platforms—often as the sole senior engineer. I cover everything from ingestion and ETL to warehouse modeling, orchestration, data quality and governance, and the semantic layer that powers the dashboards and data products people actually use. Most recently, I’ve extended my platform work into AI and governed agent access to production data. I design and deliver robust pipelines, audit data models and semantic metadata to prevent silent breakages, and create practical solutions (from conversion dashboards and KPI frameworks to MCP servers and RAG pipelines) that help stakeholders move faster with confidence.

Available to hire

Rome, Italy

I’m Giovanni Riefolo, a freelance Data & Analytics Engineer with a decade of experience building end-to-end data platforms—often as the sole senior engineer. I cover everything from ingestion and ETL to warehouse modeling, orchestration, data quality and governance, and the semantic layer that powers the dashboards and data products people actually use.

Most recently, I’ve extended my platform work into AI and governed agent access to production data. I design and deliver robust pipelines, audit data models and semantic metadata to prevent silent breakages, and create practical solutions (from conversion dashboards and KPI frameworks to MCP servers and RAG pipelines) that help stakeholders move faster with confidence.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Beginner

Beginner

Language

Italian

Fluent

English

Advanced

Spanish; Castilian

Beginner

Work Experience

Senior Analytics Engineer (Freelance) at Digital Pills / Airalo

April 1, 2026 - August 1, 2026

Extended a core commercial model with new dimensions and metrics and shipped it with zero regressions by auditing all downstream consumers one-by-one. Delivered the conversion funnel dashboard used by growth and commercial stakeholders, owning warehouse modelling through the semantic layer to the BI surface. Diagnosed and resolved circular dependencies in the dbt DAG by re-layering joins to preserve the project's layer architecture. Audited semantic-layer metadata and cleared documented-but-missing fields that were silently breaking end-user queries in production.

Data Engineer (Freelance) at Fincons / Generali UK

May 1, 2025 - March 1, 2026

Introduced business glossary terms into active governance across multiple projects, attaching data quality tests to definitions so ownership and validity stayed enforceable. Prototyped a conversational agent that let business users submit glossary term requests directly, removing the governance manual queue. Served as the sole engineer on the run team for eight months, handling end-to-end tickets including ad-hoc analysis, incidents and data investigations across a UK insurance business. Built and maintained dashboards for business stakeholders.

Developer — R / Shiny (Freelance) at Unisystems / ECDC

February 1, 2025 - February 28, 2026

Built incremental ETL infrastructure and a climate processing module feeding a vector-borne disease transmission model for the EU public health agency, plus a Shiny dashboard on top of it.

Responsible Investing - Data Analyst (Freelance) at NN IP / Goldman Sachs Asset Management

February 1, 2024 - February 1, 2024

Company-wide development of Sustainable Investment Framework (EU SFDR) Portfolio Dashboard; Development and maintenance of multiple BI dashboards (Power BI, BlackRock Aladdin); Analyses and maintenance of multiple data sources for regulation-specific data projects and products (EU Taxonomy, SDGs, Paris Agreement, PAIs, BlackRock Aladdin, Databricks, Databricks Unity Catalog, Collibra).

Lead Analytics Engineer (Freelance) at Expecta

February 1, 2023 - August 1, 2026

Built and maintained MCP (Model Context Protocol) servers across Databricks, dbt, Slack, Confluence, Outlook, Office and tabular models, enabling LLM agents to access the data platform with authentication and governance. Built RAG pipelines over internal documentation and client knowledge bases including chunking, embeddings, vector retrieval and answer evaluation. Designed and ran web data acquisition pipelines for market and competitor intelligence under rate limiting and robots.txt constraints. Owned the data platform and smart ETL end to end, embedding data quality checks into orchestration, and delivered client ETL/warehouses/reporting from workshop through handover.

Responsible Investing — Data Analyst (Freelance) at NN IP / Goldman Sachs Asset Management

April 1, 2021 - February 1, 2024

Built a firm-wide EU SFDR Sustainable Investment Framework dashboard and presented directly to portfolio managers across regions up to board level. Owned the data sources behind regulation-driven products through the NN IP to Goldman Sachs integration, keeping reporting continuous while underlying platforms changed.

Lead Data Analyst (FTE Position) at Litebit

April 1, 2020 - August 1, 2021

Delivered the data foundation behind the company’s first successful external audit, working with Grant Thornton and alongside legal for DNB regulatory reporting for a licensed crypto operator. Led a six-person data team as team lead and scrum master, building the internal data platform, ETL and BI products from scratch. Put machine learning models into production for customer lifetime value, churn and reactivation, recommendations and wallet replenishment prediction.

Head of Data Analytics & BI Products (Freelance) at DUING PLATFORM (START-UP)

April 1, 2020 - April 1, 2020

Set-up and maintenance of data analyses, development of internal unified data platform (Python, R, SSMS, Power BI, DBT); Identification, set-up and implementation of web-analytics tracking tools (Google Analytics, GTM, RS Traffic Logger); Development and maintenance of multiple BI dashboards and tools (SAP BO, SAP Analytics Cloud, Power BI).

Market & Business Intelligence Analyst (FTE) at IRDETO

March 1, 2018 - March 1, 2018

Payments & Banking & IoT – Liaised with Global Head of P&B and with the Director of IoT; Market research, leads & prospects validation and strategy development; TAM analyses, Board-level presentations (Tableau, R).

Business Intelligence Intern (Internship) at IRDETO

December 1, 2016 - December 1, 2016

Payments & Banking – Design and development of marketing and sales collaterals, extensive research on cyber-attacks and data breaches, board-level presentations of analyses and findings.