B2B · E-commerce
By Demes
Development of a B2B platform for security professionals, bringing together the catalogue, technical information and purchasing.
- My role
- Full-stack developer and product design
- Period
- 2018–2024
- Technologies
C#
.NET Core
Angular
SQL Server- REST APIs
The product, up close.
Real frames from the recording supplied by Rubén. They document the interface, not a version dated 2018 or 2024.
01 / 03Enlarge image ↗From catalogue to product
Category hierarchy, new arrivals and access to product information.
02 / 03Enlarge image ↗Find without losing context
Product lists and technical filters for exploring a specialist catalogue.
03 / 03Enlarge image ↗Compare to decide
Aligned specifications to compare equipment before purchasing.
My contribution: frontend, product design and card-payment / PayPal integration. Screens containing personal data are excluded.
Documented outcome
7,081201850,0052024
Confirmed web orders per year
Comparison of complete years. Platform growth during my contribution, not a claim of sole causation.
Source: order administration exports; the same confirmed-payment criterion in both years.
Context
A B2B platform must help professionals find products, consult documentation and purchase with clear commercial information. The challenge combines user experience and business rules.
My responsibility
Between 2018 and 2024, I contributed as a full-stack developer to the platform’s evolution: C# and .NET Core, Angular frontend, payment integrations and product design.
Technical decisions
My contribution included the frontend and integration of the card-payment gateway and PayPal into the purchase journey. The screenshots show the catalogue, filters and comparison: they document the interface, not the internal payment implementation.
The catalogue, filters and technical documentation are part of the purchasing journey. Backend services and APIs connect that experience to pricing, margins and commercial data.
The solution
Development and maintenance of catalogue and purchasing features, improving the interface and data access. The work included pricing systems, SQL optimisation and payment gateway integration.
Reading the outcome
Confirmed web orders grew from 7,081 in 2018 to 50,005 in 2024: approximately seven times the annual volume. The comparison uses complete years and the same payment-confirmation criterion.
This describes platform growth during my contribution. It does not establish technical changes as the sole cause, and it is not a measure of traffic or revenue.
A role on your team or a project in mind? Let’s talk about what you need to build.