I’m a full-stack JavaScript developer with a strong frontend focus and proven experience delivering React-based user interfaces and Node.js backend services. I’ve worked extensively with data-heavy applications, integrating backend APIs and optimizing client-side workflows. I am comfortable diving into an existing codebase and contributing immediately, particularly where frontend state and business logic are core to delivering value.

Vilmos Zoltan Kiss

I’m a full-stack JavaScript developer with a strong frontend focus and proven experience delivering React-based user interfaces and Node.js backend services. I’ve worked extensively with data-heavy applications, integrating backend APIs and optimizing client-side workflows. I am comfortable diving into an existing codebase and contributing immediately, particularly where frontend state and business logic are core to delivering value.

Available to hire

I’m a full-stack JavaScript developer with a strong frontend focus and proven experience delivering React-based user interfaces and Node.js backend services. I’ve worked extensively with data-heavy applications, integrating backend APIs and optimizing client-side workflows. I am comfortable diving into an existing codebase and contributing immediately, particularly where frontend state and business logic are core to delivering value.

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Experience Level

Expert
Expert
Expert
Expert
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
Beginner
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Language

English
Fluent
Hungarian
Fluent
Spanish; Castilian
Intermediate

Work Experience

Senior Software Engineer - Web Services at Vincit Solutions Oy
October 1, 2020 - August 1, 2025
Led development across multiple enterprise products, owning features from design to production maintenance; extended product from work management to a full project management platform, enabling budgeting and financial reporting for enterprise clients. Achieved significant UI performance improvements (~60%) in data-heavy interfaces through optimized rendering and data processing, enabling reliable large data exports (50k+ rows) using chunked processing. Architected a dynamic JSON-driven form engine enabling rapid creation of enterprise forms with out-front-end code changes. Designed a domain-driven architecture for a Laboratory Sample Management system, with full audit trails, history tracking, and multi-tenant SaaS patterns. Implemented secure authentication and authorization using Azure AD, Role-Based Access Control, and multi-tenant SaaS patterns across multiple products. Rebuilt Gantt planning app with improved performance and WCAG 2.1 AA accessibility, supporting complex project ti
Frontend Developer (Enterprise SPA) at Vincit
September 1, 2018 - December 1, 2020
Platform-focused frontend engineer for a large-scale Enterprise Asset Management SPA used across procurement, maintenance, warehousing, and administrative workflows. Contributed to core UI frameworks, workflow automation, navigation systems, and cross-application integrations. Improved data loading reliability and perceived load time by 8–12% across multiple workflows by resolving callback hell and promise waterfalls. Reduced manual input steps and user errors by ~30% across high-frequency forms via metadata-driven workflows, property inheritance, dedicated-field auto-fill, QuickAccess workflows, and create-flow protocols. Delivered major improvements to the SPA’s reusable UI framework, enhancing table, form, listing, input, and navigation modules across multiple business domains. Architected and shipped the Dashboard sub-system with drag-and-drop grid layouts, widget lifecycles, user-specific persistence, and 5+ custom widgets. Designed and maintained the SPA Navigation State Engi
Frontend Developer (Enterprise SPA) at Vincit Romania
October 1, 2017 - August 1, 2018
Frontend development for enterprise SPA across procurement, maintenance, warehousing, and admin workflows; contributed to core UI components, forms, listings, and early workflow features; improved data loading reliability and perceived load time; assisted with cross-site integrations.
Founder / E-commerce & Events at One Drop YoYo s
June 1, 2011 - December 1, 2020
Established an international online store serving customers in 50+ countries; managed product, logistics, operations, and customer support end-to-end; built brand identity; organized regional and national yo-yo competitions; led a team of 10–20 volunteers.
Ambassador & Product Designer at One Drop YoYo s
January 1, 2009 - Present
Brand ambassador and product designer; built flagship yo-yo models; collaborated with retailers on marketing; expanded brand visibility across 3 continents.
Founder / E-commerce & Events at YoYo Raven
June 1, 2011 - December 1, 2020
Founded an international online store; managed product, logistics, operations, and customer support; built brand; organized events.
Senior Software Engineer at Vincit Solutions Oy
October 1, 2020 - August 1, 2025
Led development across multiple enterprise products, owning features from design and delivery through production maintenance, working closely with product managers, designers, QA, and stakeholders.
Frontend Developer
October 1, 2017 - August 1, 2018
Remote frontend developer for a large-scale Enterprise Asset Management SPA; contributed to core UI frameworks, workflow automation, navigation systems, and cross-application integrations.
Founder / E-commerce & Events at Yo Yo Raven
June 1, 2011 - December 1, 2020
Founded an international online store serving customers in 50+ countries; managed product, logistics, operations, and customer support end-to-end; built brand website and led event logistics.
Ambassador & Product Designer at One Drop Yo Yos
January 1, 2009 - Present
Ambassador and product designer for an Oregon-based yo-yo manufacturer; designed flagship models and collaborated with retailers on social media marketing to grow brand visibility.

Education

BSc at Eötvös Loránd University, Faculty of Informatics
January 1, 2016 - December 30, 2025

Qualifications

Add your qualifications or awards here.

Industry Experience

Software & Internet, Media & Entertainment, Professional Services, Retail, Education

Experience Level

Expert
Expert
Expert
Expert
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
Intermediate
Beginner
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