Sanin Mujkić

PayXPlay is an embedded payment platform that enables users to purchase digital credits, services, or other products directly within an application through a seamless modal checkout. I worked on the platform architecture and payment flows, including product and credit management, transaction processing, payment provider integrations, and APIs for embedding checkout in third-party applications.

Sellcloud is a field sales management platform connecting service providers with external sales companies. Service providers create campaigns and assign sales regions to partner companies, which organize them across departments, teams, and individual sales representatives.

Field representatives use a tablet application to complete digital contracts with customers and capture electronic signatures. Signed contracts are securely stored on the back end and automatically delivered via email. I designed the system architecture and developed the back end, including campaign management, hierarchical access control, contract processing, and integrations with the tablet application.

A trigger-based bet placing system.

The user pre-fills triggers for a particular match and, if they are all matched during the game (real-time betting), a bet is placed on a connected betting service. Real-time notifications happen during the match as trigger changes are propagated to the customer application.

I architected and coded for this project.

Mobile application for P2P and aggregated parking.

I architected the system, coded, and led the tech team.

Railway system for train operators which connects Goteborg and Stockholm.

I coded the pricing and scheduling module of the platform.

Panasonic’s Global Communications Services is designed to enhance an airline passenger’s inflight experience and extend, enhance and differentiate an airline’s brand through custom made WiFi packages purchase web portal.

I led Scrum-based tech operations for the development team.

Coach-diary is an application that helps soccer coaches to better plan, organize, and execute many of their routine tasks, including:

• Organizing player records with all their related data (logistic, personal training sessions, health status, etc.)
• Preparing team training sessions and their related exercises, including the creation of reports before training, as well as the storage and processing of results afterwards.
• Preparing pre-match reports with a list of possible tactics.
• Scouting other teams and players.

The app is built on SaaS principles which allow many different clubs to have separate accounts within the same application.
The project (still WIP) includes three developers and one tester. I work as the Lead Developer and handled such tasks as release management, R&D with instructions for implementation, final integration, and quick fixes (on app files and database data) on production environment.

Naia Relief is an AI-powered workplace well-being platform that helps employees recognize stress patterns, identify burnout risks, and build resilience. I worked on the system architecture, DevOps infrastructure, React web application, mobile app, and Supabase-based back end. I also developed the Naia AI agent, enabling real-time interaction through video sessions, voice calls, and chat, with a focus on scalability, reliability, and secure data handling.