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I am a Senior Software Developer with extensive experience in cross-platform mobile development using Flutter and React Native, and strong full-stack web skills in React and Angular. I also have a solid foundation in Node.js backend development and database design, delivering mission-critical applications across financial services and enterprise projects for telecom, insurance, and banking sectors. I’ve led engineering teams and shaped architecture while remaining hands-on with implementation decisions. I’ve steered multi-team initiatives at GymBeam, launching mobile e-commerce apps and Magento-driven platforms, while continuously upskilling and mentoring colleagues. I enjoy solving complex problems, building scalable systems, and collaborating with product and business stakeholders to deliver value.…I am a Senior Software Developer with extensive experience in cross-platform mobile development using Flutter and React Native, and strong full-stack web skills in React and Angular. I also have a solid foundation in Node.js backend development and database design, delivering mission-critical applications across financial services and enterprise projects for telecom, insurance, and banking sectors. I’ve led engineering teams and shaped architecture while remaining hands-on with implementation decisions. I’ve steered multi-team initiatives at GymBeam, launching mobile e-commerce apps and Magento-driven platforms, while continuously upskilling and mentoring colleagues. I enjoy solving complex problems, building scalable systems, and collaborating with product and business stakeholders to deliver value.

Ján Široký

Full Stack Developer, Web Developer, Front-End Developer, +3

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I am a Senior Software Developer with extensive experience in cross-platform mobile development using Flutter and React Native, and strong full-stack web skills in React and Angular. I also have a solid foundation in Node.js backend development and database design, delivering mission-critical applications across financial services and enterprise projects for telecom, insurance, and banking sectors. I’ve led engineering teams and shaped architecture while remaining hands-on with implementation decisions. I’ve steered multi-team initiatives at GymBeam, launching mobile e-commerce apps and Magento-driven platforms, while continuously upskilling and mentoring colleagues. I enjoy solving complex problems, building scalable systems, and collaborating with product and business stakeholders to deliver value.…I am a Senior Software Developer with extensive experience in cross-platform mobile development using Flutter and React Native, and strong full-stack web skills in React and Angular. I also have a solid foundation in Node.js backend development and database design, delivering mission-critical applications across financial services and enterprise projects for telecom, insurance, and banking sectors. I’ve led engineering teams and shaped architecture while remaining hands-on with implementation decisions. I’ve steered multi-team initiatives at GymBeam, launching mobile e-commerce apps and Magento-driven platforms, while continuously upskilling and mentoring colleagues. I enjoy solving complex problems, building scalable systems, and collaborating with product and business stakeholders to deliver value.

Available to hire

I am a Senior Software Developer with extensive experience in cross-platform mobile development using Flutter and React Native, and strong full-stack web skills in React and Angular. I also have a solid foundation in Node.js backend development and database design, delivering mission-critical applications across financial services and enterprise projects for telecom, insurance, and banking sectors. I’ve led engineering teams and shaped architecture while remaining hands-on with implementation decisions.

I’ve steered multi-team initiatives at GymBeam, launching mobile e-commerce apps and Magento-driven platforms, while continuously upskilling and mentoring colleagues. I enjoy solving complex problems, building scalable systems, and collaborating with product and business stakeholders to deliver value.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Language

Slovak

Fluent

English

Advanced

French

Beginner

Work Experience

CTO Associate at GymBeam

January 1, 2025 - October 23, 2025

Assisted in overseeing the development of GymBeam’s first mobile application and contributed to four IT teams, including Magento platform development; supported architecture and product strategy.

Director of Magento Systems at GymBeam

January 1, 2025 - October 23, 2025

Led four IT teams focusing on Magento development, Next.js frontend migration, React Native mobile app, and WordPress blog; collaborated with team leads to align goals and support the mobile app development.

Flutter Developer / Front-end & Full-stack at Finportal

January 1, 2024 - October 23, 2025

Developed cross-platform internal company app (Flutter for iOS/Android/Web) with 40+ screens, chat, calculators, and complex forms; web login in React; implemented data-driven features and backend integrations.

Flutter Developer at Financie.app

January 1, 2022 - October 23, 2025

Developed Fintech mobile and web app with 40+ screens; led backend integration using Python/Go/NodeJS; initiated microservices architecture; implemented complex forms and charts.

Flutter Developer / Mobile & Web App at BodyFix.io

January 1, 2020 - October 23, 2025

Mobile app development with React Native and Flutter; neural network integration and computer vision; technical design and UI implementation in a small team.

Internal Company App Lead at PwC

January 1, 2021 - October 23, 2025

Developed internal company app with complex HTML rendering and annotations; architected and delivered the full app within six months.

Zonky – Platform Developer at Zonky

January 1, 2019 - October 23, 2025

Implemented new functionality in React and migrated functionality from AngularJS; hosted on AWS infrastructure (CloudFront, Lambda, EC2, Elastic Beanstalk, S3).

CTO Associate at GymBeam

January 1, 2025 - January 1, 2025

Assisted in overseeing the development of GymBeam’s first mobile application. Implemented the first version of automatic responses to customer emails, and collaborated with engineering leads to align mobile strategy and delivery across platforms.

Director of Magento Systems at GymBeam

January 1, 2025 - January 1, 2025

Led four IT teams focused on Magento features; front-end transitioned the store to Next.js; built a mobile app using React Native; maintained a WordPress-based blog; ensured cross-team communication and alignment of project goals; contributed to React Native development tasks.

Flutter Developer at Finportal – Financial Broker's app

January 1, 2024 - January 1, 2024

Development of a Flutter-based cross-platform internal app with 40+ screens, including chat, profiles, calculators, PDF export, charts, webviews, videos, notifications and 10+ complex forms with validations; designed and implemented Flutter frontend for iOS, Android and Web; web login flow implemented with React.

Front-end Developer at PwC – Internal company app

January 1, 2021 - January 1, 2021

Development of an internal company app with complex HTML rendering and annotations functionality; architectural design and production deployment within 6 months; Angular frontend implementation.

Front-end Developer at Zonky

January 1, 2019 - January 1, 2019

Implemented new functionality in React and migrated functionality from AngularJS; previously worked with Ember; contributed to AWS-based hosting and infrastructure; led migration efforts and frontend enhancements.

Front-end Developer at BodyFix.io

January 1, 2020 - January 1, 2020

Medical app development in Angular 6, React Native and Flutter (2017–2020); technical design, programming and UI work in a team of 3 developers; involved in neural network integration and computer vision components.

Full-stack Developer at Financie.app

January 1, 2022 - January 1, 2022

Extensive mobile application (40+ screens) with complex Python, Go and Node.js (Dart) backend microservices; technical design, implementation and UI development for mobile apps and websites across a cross-functional team of 5 developers.

Web Developer at Freelancer (Web development and design)

January 1, 2015 - January 1, 2015

Websites for small businesses with Bootstrap, jQuery and WordPress; custom design and implementation, responsive UI, website maintenance and enhancements.

Front-end Developer at Global Logic

January 1, 2018 - January 1, 2018

Angular Web App for a medical devices company; design and implementation of frontend features in Angular 6 within a team of 4 developers and 2 testers.

Front-end Developer at PosAm

January 1, 2017 - January 1, 2017

Mobile and Web app development for an insurance company; implemented new screens, logic and refactoring in AngularJS and later Angular 4 platforms.