Dan Stollenwerk

Business Intelligence Developer

Frontend solutions developer versed in devising, designing and deploying applications, dashboards and spreadsheets for both external and internal use.

Passionate about designing sophisticated, empathetic interfaces and leveraging data to modernise businesses and empower people.

EXPERIENCE

Escentral

Business Intelligence Developer

May 2025 – present · Full-time

Built full-stack React applications deployed on Azure, responsible for all frontend development and contribution to SQL backend architecture design. Projects include a curriculum data collection and validation portal and a student timetable experience analysis interface.

Led an end-to-end redesign of the company website from a preset template to a fully custom, modern solution that brought our services to the forefront, boosting key page analytics from fewer than 10 clicks per month to hundreds, driving sales.

Graduate Data Analyst

Apr 2024 – May 2025 · Full-time

Modernised the company's legacy spreadsheet- and slides-based reporting stack by leading the transition to Power BI, producing 50+ original dashboards for 20+ institutions. Normalised our data structure as part of this effort, including collapsing one-hot indicator fields into a single encoded column and enforcing a consistent schema, which reduced data size, improved semantic model performance across all clients, and saved hours of processing time per project.

Designed the full UX and UI for our reporting web app—from iconography to microcopy—and produced demo reports and guide materials to support clients with low data literacy and expedite adoption of the new platform.

Interests: UX/UI, languages, NLP

Portfolio

Apps, dashboards, websites.

Curriculum data collection app

React-based web application for collecting curriculum and module information from departments, validating submissions and writing data into an Azure- and SQL-backed model ready for reporting.

Company website overhaul

Full redesign of the company marketing site, migrating from a generic template to a custom React front end that foregrounds services, case studies and calls to action.

Language learning app rtcl

Language learning app (pronounced "article") focused on reading through local media content. Built with Next.js, React, TypeScript and Tailwind CSS; deployed on Vercel.

Student experience reporting

Custom reporting suite combining survey responses, travel patterns and timetable context to surface student experience insights for university leadership and planning teams.

Higher education Power BI dashboards

Power BI templates and bespoke dashboards for UK higher education institutions, presenting analyses of survey and curriculum data to assess resource allocation in terms of space (estate) and time (timetabling).