Case studies · Custom software in practice
What I have built.
A selection of projects I built with Appspark, for clients and as my own products. Each case explains what the question was, what I made and which technology I used.
A web shop for antique Buddha statues, in three languages.
A custom web shop in three languages for one-of-a-kind antique statues, with fast search, marketplace and email marketing integrations, and AI help in the admin.
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Radiation shielding, calculated live in 2D and 3D.
A web application that calculates the shielding of X-ray and CT rooms live to NCRP 147, with a 3D view of the dose and a report with every calculation.
Read the caseClients' bookkeeping in one place, with an app and AI.
A platform around Exact Online with a web portal, a mobile app to scan receipts and answer questions, and an AI connection for Copilot and Claude.
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Practise verbs in real sentences.
A free web app for practising verbs and words in real sentences, in five interface languages, with practice for the Dutch civic integration exam.
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A tattoo portfolio you can book from straight away.
A portfolio website in three languages with online booking, Mollie deposits, reviews and an admin with a calendar.
Read the caseThe radiation protection annual report, filled in online.
A web application where practices fill in their radiation protection annual report step by step, with reminders, signing and an automatically generated Word report.
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Got an idea or a project? Let's talk.
Tell me briefly what you want to build. I usually reply within one working day.
Robin Speerstra
Software developer