ICOSA Brewhouse
Canadian coffee accessories brand selling across Amazon, Shopify and other channels. Stock lived in every one of those plus separate manufacturer platforms, one of which sends updates as photographs rather than through any system at all. We automated the daily and weekly pull so the team reviews instead of collects.
Smellacloud
UK aromatherapy brand, sister to Geurwolkje. Every customer question used to become a Zendesk ticket answered by hand. We built an on-brand AI chatbot that answers from their Shopify store and knowledge base, and opens a ticket whenever a customer asks for a person.
HIO
A US golf matchmaking app whose first build, a native app from another team, was full of bugs and abandoned. We rebuilt it as a multi-user PWA on Next.js and Supabase, with TrueSkill ratings, location-based matchmaking, and Stripe and Twilio built in.
Domination
A Web3 team strategy game where players strategize how to take over zones on a board, like the board game Risk. Implemented the playable game in React and Solana Web3.js.
Sportivo AI
A picks dashboard that uses Machine Learning to predict winning teams for American Sports. Took complete ownership of the frontend through launch.
22 Apps
A drag-and-drop mobile app builder like ClickFunnels — users drag elements onto a screen and it compiles into a real React Native Expo app.
Geurwolkje
Leading aromatherapy diffuser brand in the Netherlands. Migrated the website to a new theme with custom sections, snippets, and app customizations.
Nielsen Light
One of the fastest-growing lamp manufacturers in Denmark. Built their B2C Shopify website from the ground up, enabling the move from B2B to direct consumer sales.
dekstech
Outsourced Lead Shopify Developer and Technical Product Manager for a boutique US Shopify agency — custom sections, snippets and apps across client engagements.
What it's like to work with us.
“We have been working with Danny for almost two years. He has taken the time to listen to our ideas and understand how we want our webshop to work, and then found ways to turn those ideas into practical Shopify solutions. I would recommend Danny to companies looking for a Shopify developer who listens, understands their needs and can be a long-term partner.”

“Sleek App has been an invaluable partner for development and SEO optimization. Their professionalism and extensive expertise have significantly contributed to our project's success. They consistently deliver solutions that enhance functionality and user experience, going well beyond our expectations.”

“Danny was able to use AI to understand how to pull the data, store it and allow us to reduce the manual work required by over 10 hours each week. That's 10 hours going back into our business. He was super easy to work with and extremely detail oriented.”

“He fixed a broken codebase written by unreliable contractors and then also created a ready to deploy pipeline that allows me to push updates as needed. Working with Danny is easy and efficient - which are the two essentials for finding a partner. He communicates efficiently, logs all requirements, delivers on time, promptly fixes any live site related issues.”

“The Lead Developer was one of the best frontend developers I have ever worked with. Easy to trust. Strong ownership. Delivered what they committed to.”

“Extremely professional in communication and ownership of tasks. Quick to take direction and run with it to efficiently produce high-quality work.”

“Very pleased to have worked with Sleek App. The team was able to quickly grasp the requirements of our complex project and deliver the initial deliverables in good time.”









