Nikolina Tkalec
Senior Frontend & Mobile Developer | React, TypeScript, RN
New to Contra
Nikolina is ready for their next project!
Description:
Full-stack scavenger hunt and storytelling platform for tourism and hospitality, built end-to-end as a personal project.
Role:
Full-Stack Developer (Personal Project)
Key Features & Responsibilities:
Designed and built a multi-tenant mobile and web platform from scratch
Built secure authentication, GPS-based features, and a reward system
Delivered a complete product across mobile, web, and backend as a solo developer
Technologies & Skills Used:
React Native (Expo), React (Vite), Node.js, PostgreSQL
Solo end-to-end ownership: architecture, development, security, deployment
Images:
Available upon request.
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Description:
Web application for managing clients, machines, and work orders with digital signing and PDF export functionalities.
Role:
Senior React Developer
Key Features & Responsibilities:
* Led development of client and machine management modules
* Enabled digital signing and PDF export for operational efficiency
* Collaborated with backend team member to deliver responsive, high-
performance UI
* Contributed to UI/UX design improvements using Figma
Technologies & Skills Used:
* React and TypeScript for frontend development
* Material-UI for consistent, responsive UI components
* react-sketch-canvas for digital signature functionality
* Responsive design for cross-device compatibility
* Figma for UI/UX collaboration
*Comprehensive testing to ensure application reliability
Images:
Due to system protection and confidentiality policies, I am unable to share more detailed screenshots or internal visuals of the platform.
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Description:
Development of a comprehensive enterprise IT system with 20+ interconnected applications supporting accounting, retail, and hospitality operations.
Role:
Full-Stack Web/Desktop Developer (JavaScript / PHP/ Pascal)
Key Features & Responsibilities:
* Maintained and enhanced 20+ integrated modules, ensuring seamless
accounting, HR, retail, and hospitality workflows
* Developed new functionalities to improve system usability and efficiency
* Ensured legal and tax compliance for VAT, payroll, and financial regulations
* Built scalable modular architecture with real-time reporting and analytics
* Balanced programming, phone support, and on-site customer training,
demonstrating strong multitasking
* Documented and tracked user requests and implemented Change Requests (CRs) to enhance system functionality
* Applied Waterfall methodology and mastered structured project delivery
Technologies & Skills Used:
* HTML, CSS, JavaScript, PHP, jQuery, Pascal
* Internal ORM PostgreSQL & Firebird
* Waterfall methodology
* Customer support & training
Images:
Due to system protection and confidentiality policies, I am unable to share more detailed screenshots or internal visuals of the platform.
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Description:
Government application for managing employment measures and administrative workflows.
Role:
Vue/TypeScript Frontend Developer
Key Features & Responsibilities:
* Developed modular, scalable frontend features to support government
employment workflows
* Simplified complex data workflows for administrative users
* Enhanced usability with intuitive interfaces
* Maintained strong TypeScript code quality
Technologies & Skills Used:
* Vue.js and Vuetify for responsive UI components
* Pinia for state management and scalable application logic
* TypeScript for strongly typed, maintainable code
* Delivered modular, maintainable features aligned with project goals
* Collaborated effectively with team members to deliver key modules and
functionalities
Images: Due to system protection and confidentiality policies, I am unable to share more detailed screenshots or internal visuals of the platform.
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