Open to opportunities

Dusko User

@duskouser

Full-stack developer shipping production SaaS end-to-end across Flutter, Next.js, React, Firebase, Supabase, and Stripe.

Bosnia and Herzegovina

Message

What I'm looking for

I’m looking for a team where I can own features end-to-end—design through deployment and maintenance—building production SaaS with strong code quality, fast iteration, and real ownership of outcomes.

I’m a full-stack developer who builds and ships production SaaS with end-to-end ownership—from data model and design to payments, deployment, and ongoing maintenance. I use AI-augmented development workflows to iterate quickly while preserving code quality.

My work is production-proven through live, multi-platform products with real users—most notably bookbed.io, a multi-platform property management SaaS across iOS, Android, Web, macOS, Linux, and Windows. I implemented a timeline booking calendar with disciplined rendering, timezone-correct overbooking detection, bidirectional iCal sync, and an embeddable owner widget that stays robust under any host CSS. I also integrated Stripe LIVE subscriptions, ran cross-tab checkout safeguards, and shipped frequent releases with detailed changelogs; my first paying customer was onboarded February 2026.

I’ve also led end-to-end development on multi-tenant SaaS like callidusos.co.uk for UK aesthetic clinics, handling UX, full code ownership, testing, deployment, and post-launch fixes. Earlier builds include a custom restaurant ordering platform (replacing an aggregator, supporting multiple languages and transactional decline workflows) and a production-ready Flutter starter kit for a US neighborhood-research app, plus FlutterFlow and Next.js landing-page template portfolios.

Experience

Work history, roles, and key accomplishments

Current

Solo Founder & Developer

Current

Bookbed.io

Oct 2025 - Present (9 months)

Built and shipped BookBed, a multi-platform property management SaaS, across iOS, Android, Web, and desktop targets with production use. Delivered calendar booking UX, iCal sync, and Stripe LIVE subscription billing with ongoing maintenance.

Flutter Dart Firebase Stripe Stripe LIVE Webhooks Resend iOS Android Cross Tab Checkout Firestore ICal Sync JavaScript

Current

Template Creator

Current

FlutterFlow Marketplace

Mar 2025 - Present (1 year 4 months)

Created and published FlutterFlow marketplace templates and custom Dart widgets. Shipped templates including an advanced Google Calendar two-way sync solution and a reusable PDF reader toolkit with annotation and sharing.

FlutterFlow Google Calendar Two Way Sync Search Syncfusion Calendar

Current

Freelance Full-Stack Developer

Current

Freelance

Jan 2024 - Present (2 years 6 months)

Develop production SaaS for clients and own ventures across mobile and web. Took projects from data model and UI through payments, deployment, and ongoing support using Flutter and modern web backends.

Flutter Next.js React Firebase Supabase Stripe SaaS Development Deployment

Lead Developer

CallidusOS

Feb 2026 - Jun 2026 (4 months)

Owned end-to-end development and launch of CallidusOS, a multi-tenant clinic SaaS for UK aesthetic clinics. Implemented a multi-tenant model with role-based permissions and Stripe subscription billing plus transactional email flows.

React Firestore Stripe Resend Multi Tenant SaaS Models

Solo Designer & Developer

Next.js Web Template Portfolio

Jan 2025 - Jan 2026 (1 year)

Designed and built multiple production landing pages using Next.js. Implemented responsive layouts and animations using TypeScript, Tailwind CSS, and Framer Motion.

Next.js TypeScript Tailwind Framer Motion Responsive Web Design

Full-Stack Developer

Pizzeria Bestek

Jun 2025 - Sep 2025 (3 months)

Replaced a third-party restaurant ordering aggregator with a fully owned custom ordering platform. Implemented multi-language storefront, email-driven admin workflow using Supabase Edge Functions, and Supabase/Stripe/Resend-based order processing.

Next.js Supabase Supabase Edge Functions Stripe Resend Localization Delivery Zone Validation Pickup Time Picker

Freelance Shopify Developer

Freelance

Jan 2023 - Jan 2024 (1 year)

Worked on Shopify storefront customization and checkout-flow development for small business clients. Implemented changes using Liquid and JavaScript and the Shopify Admin API.

Liquid JavaScript Shopify Admin API Checkout Flow

Founder & Operator

IronLife (Food Production)

Jan 2023 - Jan 2024 (1 year)

Owned a small food-production venture and managed day-to-day operations, marketing, and sales. Applied hands-on entrepreneurship and customer-facing execution to inform product judgment.

Seasonal Hospitality Staff

Various Locations

Jan 2022 - Jan 2023 (1 year)

Provided customer service in high-pressure seasonal hospitality roles across multiple locations in Croatia. Built direct customer-facing experience and work ethic under fast-paced conditions.

Customer Service Hospitality Customer Support

Flutter Starter Kit Collaborator

Relocate

Jan 2025 - Present (1 year 6 months)

Collaborated on delivering a production-ready Flutter starter kit for a US neighborhood-research app. Integrated Mapbox and RevenueCat paywall, and implemented chained observability using Sentry and Crashlytics.