# Product & Requirements > Selected Engineer ApS work demonstrating Product & Requirements — the achievements that prove it. - [Delivered 8 Power BI projects with comprehensive manuals, integrating Microsoft Power BI tools with NodeJS API and Python FastAPI for effective data analytics and visualization.](https://software.engineer.company/portfolio/delivered-8-power-bi-projects-with-comprehensive-manuals-10/) - [Led the software development of a GIS map application, driving revenue growth by 10x and positioning the product as a primary data asset.](https://software.engineer.company/portfolio/led-the-software-development-of-a-gis-map-24/) - [Optimized forecasting and investment strategies for 11 electricity grid operators, driving operational efficiency through data‑driven GIS solutions.](https://software.engineer.company/portfolio/optimized-forecasting-and-investment-strategies-for-11-electricity-27/) - [Presented 200 UI/UX improvements for the GIS map application, boosting revenue by 10x through enhanced software features.](https://software.engineer.company/portfolio/presented-200-ui-ux-improvements-for-the-gis-28/) - [Developed a Data Analytics reporting system, increasing quarterly software revenue by 400% through Python‑based PDF reports.](https://software.engineer.company/portfolio/developed-a-data-analytics-reporting-system-increasing-quarterly-44/) - [Designed the product's UI and UX end to end — directory grids, dual card/table views, live requirement validators and breadcrumb navigation.](https://software.engineer.company/portfolio/designed-the-product-s-ui-and-ux-end-76/) - [Drove client web success by combining custom website development and design with SEO, content strategy and copywriting.](https://software.engineer.company/portfolio/drove-client-web-success-by-combining-custom-website-91/) - [Built the payments and entitlements layer — Stripe alongside Apple and Google in‑app purchase — gating the directory, search and export through an 11‑table access model checked on the server.](https://software.engineer.company/portfolio/built-the-payments-and-entitlements-layer-96/) - [Built the operator back‑office — around 40 admin routes and 128 components covering claims, moderation, feature flags, cache and diagnostics — so the platform can be run without database access.](https://software.engineer.company/portfolio/built-the-operator-back-office-for-the-platform-102/) - [Built company ownership claims end to end — a user claims a company, an administrator adjudicates, and an approval rewrites the authorization graph that decides who is allowed to edit what.](https://software.engineer.company/portfolio/built-company-ownership-claims-end-to-end-103/) - [Built the loyalty and reputation system — 67 functions over a 31‑table ledger, with leagues, badges and a redemption shop — taking a row lock on the balance to close the double‑spend window.](https://software.engineer.company/portfolio/built-the-loyalty-and-reputation-system-105/) - [Built the platform's social layer — posts, feed, groups, mentions, a follower graph and an occasions digest — on the same function‑first data layer as the rest of the product.](https://software.engineer.company/portfolio/built-the-platform-s-social-layer-106/) - [Built the hiring marketplace and the seafarer career workspace — 151 stored functions across 48 tables — covering vacancies, applications, certificates, rank progression and verified sea time.](https://software.engineer.company/portfolio/built-the-hiring-marketplace-and-career-workspace-107/) - [Rewrote the application's error messages against a written tone standard after a refused sign‑in blamed the user for mistyping when the provider actually required an app‑specific password, and covered it with a test that names the provider.](https://software.engineer.company/portfolio/rewrote-the-error-messages-against-a-tone-standard-162/)