Marius is available for hire
Hire MariusMarius Repede
Verified Expert in Engineering
Front-end Developer
Redmond, WA, United States
Toptal member since April 30, 2020
Bio
Marius is a senior full-stack engineer with 10+ years of experience building scalable web and mobile applications. He specializes in React, Next.js, Node.js, and API-driven systems, with recent experience integrating AI-powered features, including LLM-based workflows. He delivers end-to-end solutions and is known for building reliable, production-ready systems.
Portfolio
Health Plans of North Carolina Inc.
React, Next.js, TypeScript, Tailwind CSS, Contentful, React Native, Expo...
Daniel Falabella
React Native, Expo, JavaScript, React, Node.js, SQL, Gmail API, REST APIs...
Hearst - eCommerce Tower Project
React, Next.js, Progressive Web Applications (PWAs), Contentful, Front-end...
Experience
- JavaScript - 12 years
- React - 10 years
- Node.js - 8 years
- TypeScript - 6 years
- React Native - 6 years
- Expo - 6 years
- Next.js - 5 years
- Contentful - 5 years
Work Experience
Full-stack Developer (React, Next.js, React Native, Expo)
2023 - PRESENT
Health Plans of North Carolina Inc.
- Delivered scalable front-end and back-end features for a healthcare platform using React, Next.js, and GraphQL, supporting secure, HIPAA-compliant workflows.
- Migrated routing architecture from a basic page-based system to Next.js app router, improving scalability, maintainability, and overall user navigation experience.
- Implemented Contentful CMS, enabling non-technical teams to manage dynamic content and reducing dependency on engineering for updates.
- Integrated third-party services, including Calendly, Zapier, and Velocify, to streamline scheduling, automation, and lead management workflows.
- Enhanced PWA performance and usability using React Native and Expo, improving responsiveness and cross-platform consistency.
- Introduced early-stage AI-assisted workflows for content handling and internal tooling, including structured data processing and automation support for operational tasks.
Technologies: React, Next.js, TypeScript, Tailwind CSS, Contentful, React Native, Expo, Android, iOS, HIPAA Compliance, GraphQL, Front-end Development, Codex, UX Design, Game Development, Mobile Design, UI Animation, Mobile UI Design, UI Design, UI Engineering, User Interface (UI), Web Design, Real-time Data, Technical Leadership, WebSockets, Full-stack, API Integration, SQL, Pinia, User Experience (UX), Full-stack Development, APIs, Dashboards, Artificial Intelligence (AI), CSS, HTML, eCommerce UX, Figma to Shopify, Visual Design, AI Tools, Agentic AI, PDF, JavaScript, Claude, API Development, Claude Code, WebGL, Performance, React Query, AI-generated Code, Cursor AI, React Navigation, HTML5, Software Architecture, Accessibility, Agile, Docker, Playwright, Booking Systems, Calendly, OAuth, Back-end, GitHub, QR Codes, Code Auditing, Databases, Automation, Client Communication, Customer Support, Troubleshooting, Web Development
Senior Full-stack Developer
2026 - 2026
Daniel Falabella
- Designed and built a next-generation email client MVP from scratch, transforming traditional inbox workflows into a social-feed style experience using React Native, Expo, and Node.js.
- Delivered end-to-end platform architecture across mobile and back-end systems, including PostgreSQL data modeling, AWS deployment, and API design.
- Integrated Gmail API for email ingestion, parsing, and preloading, enabling fast and seamless user interaction with large datasets.
- Collaborated directly with the founder to translate product vision into a scalable and production-ready platform.
- Explored AI-assisted email processing workflows, including classification and prioritization patterns to enhance user productivity and inbox management.
Technologies: React Native, Expo, JavaScript, React, Node.js, SQL, Gmail API, REST APIs, Firebase, Amazon Web Services (AWS), Stripe, Front-end Development, Azure, Codex, Webhooks, Internet of Things (IoT), Zoho CRM, Unity, UX Design, Virtual Reality (VR), Game Design, Game Development, Motion Design, Eye Tracking, UI Animation, Mobile UI Design, UI Design, UI Engineering, User Interface (UI), Web Design, Real-time Data, Technical Leadership, WebSockets, Full-stack, API Integration, Vue 3, Pinia, User Experience (UX), Full-stack Development, APIs, iOS SDK, Artificial Intelligence (AI), Shopify, CSS, HTML, eCommerce UX, Shopify Liquid, Figma to Shopify, Klaviyo, Visual Design, Integration, AI Tools, Agentic AI, Application Modernization, Document Processing, PDF, TypeScript, Python, Claude, FastAPI, API Development, Supabase, Claude Code, WebGL, Performance, React Query, AI-generated Code, Cursor AI, .NET, Gradle, Mobile Apps, React Navigation, Sentry, HTML5, Software Architecture, Accessibility, Agile, Docker, Booking Systems, Calendly, Google Calendar API, Back-end, GitHub, QR Codes, Code Auditing, Web Push Notifications, eCommerce, Databases, Automation, Client Communication, Customer Support, Web Development
React and React Native Engineer
2022 - 2023
Hearst - eCommerce Tower Project
- Delivered a custom PWA eCommerce platform using React, Next.js, Contentful, and Magento, supporting content-driven experiences at scale.
- Built modular, reusable front-end components based on Figma designs, enabling consistent UI patterns and easier future enhancements.
- Designed the front-end architecture to support long-term scalability and efficient integration of new features.
- Improved data consistency by resolving synchronization issues between Magento and Contentful through API integration.
- Enhanced performance, responsiveness, and cross-device compatibility using React Native and Expo.
- Contributed to scalable content workflows, enabling teams to manage and publish content efficiently across large audiences.
Technologies: React, Next.js, Progressive Web Applications (PWAs), Contentful, Front-end, Django, Server-side Rendering (SSR), Hybrid Apps, React Native, Expo, Android, iOS, GraphQL, Front-end Development, Codex, UX Design, Virtual Reality (VR), Game Design, Game Development, Motion Design, Mobile Development, Eye Tracking, Mobile Design, UI Animation, Mobile UI Design, UI Design, UI Engineering, User Interface (UI), Web Design, Real-time Data, Full-stack, API Integration, Swift, Objective-C, Pinia, User Experience (UX), Full-stack Development, CSS, HTML, eCommerce UX, Shopify Liquid, Visual Design, AI Tools, JavaScript, TypeScript, Claude, FastAPI, Claude Code, WebGL, Performance, React Query, AI-generated Code, Cursor AI, Gradle, Mobile Apps, React Navigation, HTML5, Docker, GitHub, Lovable, App Store Acceptance Process, QR Codes, Code Auditing, eCommerce, Client Communication, Web Development
Senior React and React Native Developer
2020 - 2021
Anthem, Inc
- Delivered front-end features for the TeleHealth OS platform during the COVID-19 surge, supporting rapid scaling and increased user demand.
- Maintained and enhanced core application functionality across web and mobile, ensuring reliability during high-traffic usage.
- Collaborated within a cross-functional team of 25+ engineers using Agile methodologies to deliver stable and iterative improvements.
- Improved video connectivity performance and reduced loading times by optimizing front-end rendering and network handling.
- Contributed to platform scalability and stability as user demand increased significantly, supporting millions of users.
Technologies: React, Redux, JavaScript, Twilio API, Front-end, Server-side Rendering (SSR), Mobile Applications, React Native, Expo, Front-end Development, Zoho CRM, Unity, UX Design, Virtual Reality (VR), Mobile Development, Eye Tracking, Mobile Design, UI Animation, Mobile UI Design, UI Design, UI Engineering, User Interface (UI), Web Design, Real-time Data, WebSockets, Full-stack, Swift, Objective-C, Pinia, User Experience (UX), Full-stack Development, CSS, HTML, eCommerce UX, Visual Design, AI Tools, TypeScript, Claude, WebGL, Performance, React Query, AI-generated Code, Gradle, Mobile Apps, React Navigation, HTML5, GitHub, Lovable, App Store Acceptance Process, QR Codes, Code Auditing, eCommerce, Client Communication, Troubleshooting, Web Development
Lead React Developer
2019 - 2020
Zammo.AI
- Built a voice-enabled publishing platform supporting integrations with Alexa, Cortana, and Google voice ecosystems.
- Delivered a fully responsive React and TypeScript application, reducing development time through reusable component design.
- Designed front-end architecture to support voice-driven interactions and seamless integration with external voice platforms.
- Collaborated with product stakeholders to translate requirements into scalable and user-friendly application features.
Technologies: Chargebee, Styled-components, Redux, TypeScript, React, Front-end, Mobile Applications, UI Animation, UI Design, UI Engineering, User Interface (UI), Web Design, Real-time Data, Technical Leadership, WebSockets, Full-stack, User Experience (UX), Full-stack Development, CSS, HTML, eCommerce UX, Visual Design, Integration, Agentic AI, Windsurf, JavaScript, Claude, API Development, Supabase, Performance, React Query, React Navigation, HTML5, Software Architecture, Accessibility, Agile, Docker, Cypress, Calendly, Google Calendar API, OAuth, Back-end, GitHub, Code Auditing, Web Push Notifications, Databases, Client Communication, Troubleshooting, Web Development, DNS
Senior React Redux Developer
2019 - 2020
UrbanSDK
- Designed and developed a machine learning-driven web application for traffic prediction and navigation insights.
- Built the application architecture from scratch using React and Redux, enabling scalable and maintainable front-end systems.
- Improved development efficiency by refactoring the architecture and reducing complexity across the codebase.
- Managed multiple responsibilities, including front-end development, architecture design, and feature delivery.
Technologies: Material UI, Redux-Saga, Redux, React, Front-end, Angular, Amazon Web Services (AWS), Server-side Rendering (SSR), Azure, Ajax, NestJS, UX Design, UI Animation, UI Design, UI Engineering, User Interface (UI), Web Design, Real-time Data, Full-stack, API Integration, User Experience (UX), Full-stack Development, iOS SDK, CSS, HTML, eCommerce UX, Visual Design, JavaScript, Supabase, Performance, React Query, HTML5, Software Architecture, Docker, GitHub, Web Push Notifications, Databases, Client Communication, Web Development
Senior React and Node Developer
2019 - 2019
Move Electric Mobility Inc
- Developed a transportation logistics platform that manages the movement of goods and personnel across several networks in the Vancouver Metro Area, primarily focusing on using electric vehicles and environmentally sustainable technologies.
- Designed a pixel-perfect UI from the ground up using Adobe XD and hired and managed several development teams for the site's production.
- Planned, managed, and tracked development efforts across four distinct stacks and assisted the app owner in budget and resource planning for the optimal completion of the project.
Technologies: Stripe, Node.js, Redux, React, Server-side Rendering (SSR), Front-end Development, Azure, Webhooks, Internet of Things (IoT), UX Design, UI Animation, UI Design, UI Engineering, User Interface (UI), Web Design, Real-time Data, Full-stack, REST APIs, User Experience (UX), Full-stack Development, eCommerce UX, JavaScript, HTML5, Back-end, GitHub, eCommerce, Databases, Client Communication, Web Development
Senior Vue and Node.js Developer
2018 - 2019
SoldNest
- Developed a real estate platform enabling property listing, data analysis, and user-driven insights.
- Built back-end services and front-end interfaces using Vue, Nuxt.js, and Node.js.
- Applied data-driven logic to support pricing insights and user decision-making workflows.
- Improved application usability and overall performance through UI and data handling optimizations.
Technologies: MongoDB, Node.js, Nuxt.js, Vue, Nuxt 3, Server-side Rendering (SSR), Vite, Front-end Development, Ajax, UX Design, Real-time Data, Full-stack, Vue 3, User Experience (UX), Full-stack Development, eCommerce UX, JavaScript, Back-end, GitHub, Databases, Client Communication, Web Development
Senior React and Node.js Developer
2017 - 2019
Proven Skincare
- Built a high-traffic web platform supporting personalized skincare recommendations and eCommerce workflows.
- Developed dynamic front-end features to improve user experience and engagement.
- Led development efforts for key features, ensuring on-time delivery and alignment with product goals.
- Collaborated with stakeholders to define requirements and deliver scalable solutions across the platform.
Technologies: Stripe, MongoDB, Node.js, Redux Thunk, Redux, React, Front-end Development, Webhooks, Real-time Data, Full-stack, REST APIs, SQL, Full-stack Development, APIs, JavaScript, Back-end, GitHub, Databases, Client Communication, Web Development
Project History
Provenskincare
https://www.provenskincare.com/A platform that uses AI to personalize your skincare based on lifestyle and skin type.
I built a web app for Provenskincare with React, Redux, Redux-thunk, Hapi.js, Node.js, MongoDB, and Stripe.
I was a full-stack developer who led a team of three developers.
I built a web app for Provenskincare with React, Redux, Redux-thunk, Hapi.js, Node.js, MongoDB, and Stripe.
I was a full-stack developer who led a team of three developers.
SoldNest
https://www.soldnest.com/A real estate platform designed to help homeowners by using SEO and an extremely detailed data input system to advertise and sell their properties for the best possible price.
Technologies used: Vue.js, Nuxt.js, Node.js, MongoDB
Technologies used: Vue.js, Nuxt.js, Node.js, MongoDB
Zammo
https://app.zammo.ai/A publishing app for voice platforms (Alexa, Cortana, and Google).
Zammo is a Microsoft subsidiary with a primary focus on the development and integration of voice technology, specifically apps designed to network and interfaces with other voice apps like Google, Cortana, Alexa, and any other voice platforms.
Technologies: React, Typescript, Redux, Redux-thunk, Styled-components
Zammo is a Microsoft subsidiary with a primary focus on the development and integration of voice technology, specifically apps designed to network and interfaces with other voice apps like Google, Cortana, Alexa, and any other voice platforms.
Technologies: React, Typescript, Redux, Redux-thunk, Styled-components
Collegevine
https://www.collegevine.com/I developed a dynamic and interactive website that ensured high traffic, page views, and user experience.
I used SEO best practices to elevate an organization's web presence; I achieved top 10 Google rankings on several highly competitive keywords.
Technologies: GatsbyJS, React, Styled-components, Netlify CMS
I used SEO best practices to elevate an organization's web presence; I achieved top 10 Google rankings on several highly competitive keywords.
Technologies: GatsbyJS, React, Styled-components, Netlify CMS
ShopBAZAAR | React-based Magento eCommerce PWA
https://shop.harpersbazaar.com/A React-based, Magento eCommerce progressive web app that leverages the Contentful content management system (CMS). ShopBazaar allows users to quickly create and shape content for their personal needs. Users can also efficiently infuse content with data with Magento's SEO capabilities to effectively target diversified audiences for maximum visibility.
I was this project's senior front-end React developer, focused entirely on integrating the Contentful CMS. I advised on how this system could mesh with other systems like Magento, employing my many years of experience working with PWAs, React, and Contentful and integrating 3rd-party APIs.
I was this project's senior front-end React developer, focused entirely on integrating the Contentful CMS. I advised on how this system could mesh with other systems like Magento, employing my many years of experience working with PWAs, React, and Contentful and integrating 3rd-party APIs.
Health Plan of North Carolina
A React/Next.js-based Healthcare web app designed to allow individuals who own Blue Cross Blue Shield healthcare plans to monitor their plans while also being able to customize them to their specific plans and needs. This application was designed to allow administrators to quickly and easily hot-swap pages and apps via the Next.js/React interface and be able to easily use analytics to assess and debug potential flaws and unforeseen edge cases, allowing the development cost and maintenance to be kept at a minimum.
Skills
Libraries/APIs
Stripe, React, Vue, Node.js, Redux-Saga, MobX, Vue 3, REST APIs, API Development, WebGL, React Query, React Navigation, Google Calendar API, D3.js, RxJava, Context API, Gmail API, Chart.js, Playwright, Twilio API
Tools
Git, Redux Thunk, Expo, Claude Code, Codex, Claude, GitHub, Amazon Simple Queue Service (SQS), Astro, Prisma, Gradle, Sentry, Windsurf
Languages
PHP, JavaScript, TypeScript, GraphQL, Java, Kotlin, Rust, Python, Swift, SQL, Objective-C, CSS, HTML, Shopify Liquid, HTML5
Frameworks
React Native, Angular, Redux, Next.js, Nuxt.js, Material UI, Express.js, Tailwind CSS, Django, Spring, Nuxt 3, NestJS, SwiftUI, Laravel, .NET, Unity, iOS SDK, Cypress
Paradigms
REST, Code Refactoring, HIPAA Compliance, UX Design, Motion Design, Mobile Development, Mobile Design, Mobile UI Design, UI Design, Visual Design, Agile, Automation
Platforms
Contentful, Shopify, Amazon Web Services (AWS), Android, iOS, Vercel, Firebase, Azure, Klaviyo, Docker, Calendly, Netlify, Google Cloud Platform (GCP), AWS Lambda, Mapbox, Zoho CRM
Storage
MongoDB, PostgreSQL, Redis, JSON, MySQL, Google Cloud, Databases, Amazon DynamoDB, NoSQL
Industry Expertise
Web Design
Other
Front-end Development, Styled-components, Gatsby, Apollo, Progressive Web Applications (PWAs), Front-end, Server-side Rendering (SSR), Hybrid Apps, Mobile Applications, Cloudflare, Full-stack Development, GitHub Actions, Webhooks, Deployment, APIs, Back-end, Algorithms, Integration, SDKs, Vite, Mobile App Development, Payment APIs, API Integration, AI Integration, Supabase, Cursor AI, Internet of Things (IoT), Virtual Reality (VR), Game Design, Game Development, Eye Tracking, UI Animation, UI Engineering, User Interface (UI), Real-time Data, Technical Leadership, WebSockets, Full-stack, Pinia, User Experience (UX), Dashboards, eCommerce UX, Figma to Shopify, AI Tools, Agentic AI, Application Modernization, Document Processing, PDF, FastAPI, Performance, AI-generated Code, Mobile Apps, Software Architecture, Accessibility, OAuth, App Store Acceptance Process, QR Codes, Code Auditing, Web Push Notifications, eCommerce, Client Communication, Customer Support, Troubleshooting, Web Development, Chargebee, Amazon RDS, React Hooks, RESTFul APIs, Ajax, Artificial Intelligence (AI), Booking Systems, Lovable, DNS
Collaboration That Works
How to Work with Toptal
Toptal matches you directly with global industry experts from our network in hours—not weeks or months.
1
Share your needs
Discuss your requirements and refine your scope in a call with a Toptal domain expert.
2
Choose your talent
Get a short list of expertly matched talent within 24 hours to review, interview, and choose from.
3
Start your risk-free talent trial
Work with your chosen talent on a trial basis for up to two weeks. Pay only if you decide to hire them.
Top talent is in high demand.
Start hiring