Zagreb, Croatia · Working remotely
Full-Stack Product Engineer
I build interfaces, APIs, and the data behind them.
I work across enterprise platforms, mobile apps, and independent products, from idea to production.
Remote employment or long-term B2B
Selected work
Client work · through Deegloo
ProductionFaster reads for the office. Safer workflows in the field.
I owned the backend read-model rollout and shared offline-first mobile workflows, from diagnosis through production delivery.
Nine endpoints migrated. Five mobile workflows brought into one shared subsystem.
Independent product · built and run solo
Live productRacket comparison, backed by reliable product data.
A racket comparison product that pays for itself. I built the daily catalogue pipeline and a separate, pre-release research layer with bounded verification and repair.
Freelance · lead full-stack developer
Client demoMoney flows that stay honest when settlement is asynchronous.
A working client demo with asynchronous settlement, transactional ledger writes, and a multi-currency cashier. Production hardening is documented in the case study.
Deposits credit on confirmation. Classified withdrawal failures receive a compensating refund.
Interface prototype
A workout-tracking interface exploring routine creation, sets, and progress views. Presented here as a prototype, with source and screenshots.
React · TypeScript · Next.js
Earlier project · example data
An operations app for managing schedules, events, registrations, and activity planning.
HTML · CSS · Express · PostgreSQL
From a colleague
“The ownership and pride Zvonimir takes in his work were noticed and highly appreciated by me and his peers. I highly recommend Zvonimir for a position as a senior software developer.”
Experience
Five years across enterprise platforms, field operations, and transaction-heavy products.
Jun 2024 – present
Client: Ever.Ag, US · logistics and tracking platform
Led a CDC-driven read-model rollout that cut production API response times by approximately 70%, and owned offline-first mobile workflows used across field operations.
React · Ionic · TypeScript · Java 21 · Spring Boot · PostgreSQL
Read case studyNov 2022 – Jun 2024
Client: Travel + Leisure Co., US · platform serving 100+ brand websites
Built the React and TypeScript architecture that separates shared templates from per-brand customisation across 100+ sites, defining the boundaries with the client directly.
React · TypeScript · REST APIs · CI/CD
Jun 2021 – Oct 2022
Internal enterprise tools, telecommunications
Java backend components for data processing, reporting and system integration, plus the frontends that used them.
Java · JavaScript
2025
White-label iGaming platform · deployed client demo
Designed and built asynchronous deposit and withdrawal journeys with real-time status, transactional ledger writes, and automatic compensation on classified failures.
SolidJS · Node.js · Express · Socket.IO · MySQL
Read case studyJul 2022 – Jun 2023
Construction Works Estimator
Cost and quantity planning tool for construction works, built end to end.
Java · Spring Boot · React · PostgreSQL
About
Shaping a data model, making an API reliable, and turning it into an interface people can use confidently.
My strongest stack is React, TypeScript, Spring Boot and PostgreSQL. I work across enterprise platforms and independent products, taking features from the first decisions through production delivery.
Outside work, I train, travel and play padel. PadelScout began with a problem I wanted to solve for myself.
2018 – 2023 · Faculty of Electrical Engineering and Computing
Thesis: predictive methods and text analysis for forecasting tennis match outcomes.
Get in touch
Available for remote employment or long-term B2B work.
I reply within a day, Zagreb time. I can overlap with US teams for 3–4 hours when needed.