About the studio
A compact studio with a serious obsession for craft.
AP13 is a compact digital studio with 6 years of experience across web, mobile, design systems, AI-enabled workflows, and production launches.
Luka Bartulović
Founder · Developer
Meet the founder
The developer behind AP13.
Luka BartulovićSenior Full-Stack DeveloperSplit, Croatia
Luka is a senior full-stack developer with 6 years of experience designing and delivering scalable, high-performance web applications. He specializes in React, Next.js, and TypeScript, building user-centric, responsive interfaces for clients across Europe and the US.
His focus is AI-powered product development and clean architecture - from custom AI agents that automate real workflows to full-stack apps with real-time messaging, analytics, and intelligent assistance. Having led front-end work on high-traffic international platforms, he owns each project end to end: architecture, interface, engineering, and launch.
Currently
Architecting and leading front-end for an Austrian real-estate platform in Next.js & TypeScript, with custom AI agents for property search and lead qualification.
Our story
Built for precise digital execution.
We work remotely from Croatia, helping founders, operators, and growing teams turn product ideas into working software. Our focus is simple: clear scope, strong interface design, clean code, and shipping discipline.
AP13 is intentionally small. That keeps communication direct, quality visible, and every decision close to the people actually designing and building the product.
We care about speed, but never at the expense of maintainability. The best work is useful on launch day and still understandable months later.
Principles
How we make decisions.
The same rules guide strategy, design, engineering, and launch support across every engagement.
Product First
We start with the business problem, user workflow, and release target before choosing the implementation path.
Clean Engineering
We prefer maintainable architecture, clear contracts, and practical technology over unnecessary novelty.
Fast Delivery
Staying small keeps scope clear, communication direct, and the build focused — with no layers to slow it down.
Partner Mindset
We stay close to client goals, explain trade-offs, and treat the outcome as shared responsibility.
The journey
The path to AP13.
Six years of compounding craft — from first freelance launches to a focused product studio.
The Spark
Started shipping freelance projects and sharpening the React and JavaScript craft through real-world launches.
First Paying Clients
Delivered production sites and small apps for EU clients, building a stronger reference base.
Stack Mastery
Doubled down on Next.js, React Native, Supabase, and modern UI systems for MVP delivery.
Product Mindset
Balanced client work with product prototypes across messaging, event, and productivity workflows.
AP13 Idea & Brand
Defined the AP13 identity, mission, and early website — a home for the work under one brand.
Studio Focus
Focused AP13 as a boutique studio shipping polished web, mobile, and AI-powered products end to end.
Work with us
Let's turn your idea into a product.
Bring the goal, audience, and constraints. We'll help shape the digital product around them.