Serob is available for hire
Hire SerobSerob Khurshudyan
Verified Expert in Engineering
Full-stack Engineer and Developer
Yerevan, Armenia
Toptal member since February 9, 2026
Bio
Serob is a senior full-stack engineer with strong experience building high-load web applications, real-time systems, and scalable SaaS products. He specializes in React, Next.js, Node.js, and TypeScript. Serob has worked on platforms with 1+ million monthly users, and his focus is on end-to-end ownership, clean architecture, performance optimization, and the delivery of reliable, production-ready solutions.
Portfolio
FelixSells.ai LLC
TypeScript, Next.js, Supabase, React, Node.js, Large Language Models (LLMs)...
Software Development Hub
JavaScript, React, Context API, Tailwind CSS, TypeScript, WebSockets, Docker...
AppsGeyser
JavaScript, React, TypeScript, Next.js, Node.js, CSS, HTML, APIs, Full-stack...
Experience
- JavaScript - 5 years
- React - 5 years
- Node.js - 4 years
- TypeScript - 4 years
- NestJS - 3 years
- GraphQL - 3 years
- AWS IAM - 3 years
- Next.js - 3 years
Preferred Environment
GitHub, Jira, Notion
The most amazing...
...thing I've built and scaled a full-stack web platform serving 1+ million monthly users, focusing on performance, scalability, and clean system architecture.
Work Experience
Full-stack Developer (Next.js)
2026 - 2026
FelixSells.ai LLC
- Developed and delivered end-to-end features for a real estate PropTech platform using Next.js, React, TypeScript, Node.js, and Supabase, taking ownership from architecture to production deployment.
- Designed and implemented scalable back-end APIs and database models, improving application reliability while supporting complex business workflows and transaction management.
- Optimized application performance by leveraging Server Components, efficient data fetching, and modern front-end architecture to deliver a fast and responsive user experience.
- Collaborated closely with product managers and designers to translate business requirements into production-ready features while maintaining high code quality and best engineering practices.
- Integrated AI-powered functionality to streamline user workflows and automate decision-making processes, improving the overall user experience and operational efficiency.
Technologies: TypeScript, Next.js, Supabase, React, Node.js, Large Language Models (LLMs), APIs, SendGrid API, Stripe API, DocuSign, Docuseal, Redis, BullMQ, Workers, Docker, Microservices, Web App Development, Scalability, Vector Databases, LLM Integration, AI Agent Orchestration, Retrieval-augmented Generation (RAG), eCommerce, Agentic RAG Systems, RAG Systems, RAG Architecture, Systems Design, Agentic Coding, API Design, Integrations, Responsive UI, AI-assisted Development
Senior Front-end Developer
2025 - 2026
Software Development Hub
- Developed front-end features for a pharmacy aggregation platform, including product listings, search, and pharmacy detail views using React.
- Integrated front- with back-end APIs to display real-time product availability and pricing data.
- Improved front-end performance and user experience through component optimization and better state management.
- Collaborated with back-end developers, product managers, and designers to deliver a reliable and user-friendly healthcare product.
- Refactored front-end codebase to improve maintainability, readability, and long-term scalability.
Technologies: JavaScript, React, Context API, Tailwind CSS, TypeScript, WebSockets, Docker, Jenkins, CSS, HTML, APIs, Testing, HTML5, Responsive Web Design (RWD), UI Design, Vite, Zod, Zod Schema, Modern JavaScript, Web Application Architecture, Consumer-facing Products, Authentication, Deployment, React Hooks, REST, Role-based Access Control (RBAC), Jest, GitHub, Jira, Software Architecture, Code Review, Scalable Architecture, Git, SCSS, JSON Web Tokens (JWT), Dashboards, Front-end, UI Animation, User Experience (UX), Quality Assurance (QA), Mixpanel, Minimum Viable Product (MVP), Mobile Design, User Interface (UI), Front-end Development, Design Systems, Front-end Architecture, SaaS, UI Development, End-to-end Implementation (E2E), Figma to React, API Development, NPM, ECMAScript (ES6), Third-party APIs, Coding, QR Codes, Auth, Component-based Development, Web Development, User Roles, Responsive, Responsive Design, Responsive Coding, Multilingual Websites, Sentry, Unit Testing, Software, Software Development, Application State Management, Authorization, Code Deployment, DOM, Data Validation, Debugging, Secure Coding, RESTFul APIs, RESTful Web Services, Web App Development, Agentic Coding, API Design, Integrations, Responsive UI, Zustand, AI-assisted Development
Senior Full-stack Developer
2024 - 2026
AppsGeyser
- Developed and maintained core platform features, including subscriptions, payments, feature access control, and user management for a large-scale SaaS product.
- Took full ownership of features from requirements and architecture through implementation, testing, and production deployment.
- Improved platform performance and stability by optimizing database queries, introducing caching strategies, and refactoring critical back-end components.
- Built and maintained back-end services handling high user traffic and complex business logic using Node.js and SQL-based databases.
- Collaborated with product managers, QA, and infrastructure teams to deliver stable releases and scalable system behavior.
- Participated in architectural discussions and technical decision-making to improve long-term scalability and maintainability.
- Refactored legacy code and improved system reliability by introducing more precise separation of concerns and cleaner architecture.
Technologies: JavaScript, React, TypeScript, Next.js, Node.js, CSS, HTML, APIs, Full-stack, API Integration, Architecture, Payment APIs, Payment Security, Payments, Webhooks, Stripe API, Figma, Responsive Web Design (RWD), UI Design, Stripe, Full-stack Development, CI/CD Pipelines, Cloudflare, Microservices, Modern JavaScript, REST APIs, Refactoring, AI Integration, Authentication, Deployment, Framer Motion, React Hooks, Performance Optimization, REST, Role-based Access Control (RBAC), React Testing Library, Webpack, GitHub, Agile Software Development, Back-end Architecture, Back-end Development, Software Architecture, Code Review, Scalable Architecture, Git, Page Speed Optimization, JSON, SCSS, MySQL, Search Engine Optimization (SEO), Server-side Rendering (SSR), Static Site Generators, API Management, Back-end, OAuth, full stack JavaScript, API Architecture, Front-end, User Experience (UX), Legacy Code, Data Engineering, Data Masking, Data Modeling, Database Migration, Integration, Multi-tenant SaaS, Quality Assurance (QA), SQL, Large Language Models (LLMs), REST API Architecture, Agentic AI, Mixpanel, Android, Mobile Apps, iOS, Minimum Viable Product (MVP), Mobile Design, User Interface (UI), Front-end Development, Migration, Front-end Architecture, Microfrontends, SaaS, UI Development, End-to-end Implementation (E2E), Figma to React, API Development, Databases, Contentful, Core Web Vitals, NPM, ECMAScript (ES6), Fintech, JSON REST APIs, Coding, QR Codes, PHP, Auth, Component-based Development, Web Development, Payment Gateways, PayPal, Material UI, Yarn, User Roles, SSG, Dynamic Routing, Responsive, Responsive Design, Responsive Coding, Headless WordPress, Backups, GitLab, Code Refactoring, Software, Software Development, Application State Management, Authorization, Code Deployment, Data Validation, Debugging, Secure Coding, RESTFul APIs, RESTful Web Services, Google Analytics, SEO Tools, Mobile App Development, Mobile Development, Web App Development, Scalability, Firebase, eCommerce, Leadership, Systems Design, Agentic Coding, API Design, Landing Pages, Google Analytics 4 (GA4), Laravel, Integrations, Responsive UI, AI-assisted Development, Technical Leadership
Full-stack Developer
2023 - 2024
Gauge Automotive
- Developed full-stack features for an automotive bidding platform, including vehicle listings, bidding flows, and user dashboards.
- Built and integrated back-end APIs to support auctions, bid validation, and user interactions using Node.js.
- Implemented front-end interfaces using React to display real-time bidding data and vehicle details.
- Collaborated with product and design teams to translate business requirements into scalable technical solutions.
- Improved system reliability and performance by refactoring critical paths and optimizing data flow between front and back ends.
Technologies: React, TypeScript, Redux, Node.js, Express.js, MongoDB, CSS, HTML, APIs, Full-stack, API Integration, Architecture, Payment APIs, Payments, Security, Figma, HTML5, Responsive Web Design (RWD), UI Design, Full-stack Development, Zod, Zod Schema, Modern JavaScript, REST APIs, Web Application Architecture, Authentication, React Hooks, REST, Role-based Access Control (RBAC), GitHub, Jira, Back-end Architecture, Back-end Development, TypeORM, Software Architecture, Amazon EC2, Git, MySQL, API Management, Back-end, JSON Web Tokens (JWT), full stack JavaScript, Dashboards, API Architecture, Front-end, User Experience (UX), Legacy Code, Data Masking, Data Modeling, Database Migration, Integration, Quality Assurance (QA), SQL, REST API Architecture, Mobile Design, User Interface (UI), Front-end Development, Migration, Design Systems, Front-end Architecture, Microfrontends, SaaS, UI Development, End-to-end Implementation (E2E), Figma to React, API Development, Databases, Contentful, Core Web Vitals, NPM, ECMAScript (ES6), Platforms, Third-party APIs, JSON REST APIs, Twilio, CRM, Customer Relationship Management (CRM), Coding, Auth, Component-based Development, Web Development, Payment Gateways, Bitbucket, Material UI, NoSQL, User Roles, Responsive, Responsive Design, Responsive Coding, Backups, GitLab, Multilingual Websites, Software, Software Development, Application State Management, Authorization, Code Deployment, DOM, Data Validation, Secure Coding, RESTFul APIs, RESTful Web Services, Web App Development, Monday.com, API Design, Google Analytics 4 (GA4), Responsive UI
Senior Front-end Developer
2023 - 2023
Metacade
- Redesigned key UI screens and improved layout consistency across the Metacade platform.
- Implemented full internationalization (i18n), enabling scalable multilingual support for global markets.
- Refactored front-end components into a cleaner, reusable structure using Next.js and TypeScript.
- Improved user experience by polishing interactions, spacing, typography, and responsiveness.
- Fixed UI edge cases and ensured consistent behavior across different devices and browsers.
- Collaborated with product/design stakeholders to align UI changes with brand and growth goals.
Technologies: Next.js, Tailwind CSS, i18next, Modern JavaScript, Refactoring, Framer Motion, React Hooks, REST, GitHub, Jira, Git, Search Engine Optimization (SEO), Server-side Rendering (SSR), Static Site Generators, Front-end, UI Animation, User Experience (UX), Integration, Mobile Design, User Interface (UI), Front-end Development, Design Systems, SaaS, UI Development, Figma to React, NPM, Coding, QR Codes, Component-based Development, Web Development, Bitbucket, NoSQL, Yarn, SSG, Responsive, Responsive Design, Responsive Coding, GitLab, Code Refactoring, Software, Software Development, DOM, Debugging, Web App Development, Responsive UI, Zustand
Back End Nest.js/Node.js Developer
2021 - 2022
Prof It Development Company
- Delivered multiple client projects end-to-end, from discovery to production release, ensuring stable performance and clean, maintainable codebases.
- Built and shipped React and Next.js front ends with responsive UI, SEO optimization, and reusable component systems for faster delivery.
- Developed scalable Node.js APIs with clear REST principles, validation, error handling, and structured logging across projects.
- Implemented MySQL database schemas and optimized queries, improving response times and reducing bottlenecks in high-traffic flows.
- Designed Prisma-based data layers, reducing manual SQL complexity and accelerating back-end feature development across teams.
- Integrated 3rd-party services and APIs, handling auth, rate limits, retries, and edge cases for reliable production behavior.
- Wrote automated tests with Jest for critical business logic, reducing regressions and increasing confidence during refactors.
- Refactored legacy codebases into cleaner, modular architecture, improving readability, onboarding speed, and long-term scalability.
- Collaborated directly with clients and PMs in an outsourcing environment, delivering predictable timelines across parallel projects.
- Owned full-stack delivery across multiple apps simultaneously, balancing new features, bug fixes, and production support.
Technologies: JavaScript, React, Node.js, NestJS, AWS IAM, Next.js, Full-stack Development, CI/CD Pipelines, Zod, Zod Schema, REST APIs, Refactoring, Web Application Architecture, Consumer-facing Products, Authentication, React Hooks, REST, GitHub, Back-end Architecture, Back-end Development, Software Architecture, Code Review, Git, Page Speed Optimization, JSON, Search Engine Optimization (SEO), Server-side Rendering (SSR), Static Site Generators, API Management, Back-end, JSON Web Tokens (JWT), full stack JavaScript, API Architecture, Legacy Code, Data Engineering, Data Masking, Data Modeling, Database Migration, Multi-tenant SaaS, Quality Assurance (QA), SQL, REST API Architecture, Migration, API Development, Databases, NPM, ECMAScript (ES6), JSON REST APIs, Coding, Auth, Component-based Development, Web Development, Payment Gateways, PayPal, User Roles, Python, Backups, Multilingual Websites, Vue, Code Refactoring, Authorization, Data Validation, Debugging, Secure Coding, RESTFul APIs, DocumentDB, Amazon DocumentDB, RESTful Web Services, Firebase, Firebase Authentication, Django, HIPAA, Healthcare, FastAPI, API Design, Laravel
Experience
HTML to APK Builder
https://appsgeyser.com/A web-based platform that allows users to convert HTML and web-based applications into fully functional Android APK files without native Android development.
As a full-stack engineer, I worked on the system architecture, back-end logic, and front-end integration. The platform handled user input validation, build configuration, asset processing, and automated APK generation workflows.
I implemented back-end services to manage build jobs, configuration presets, and error handling, ensuring reliable and repeatable APK builds. On the front-end side, I developed interfaces for uploading HTML projects, configuring build options, and tracking build progress.
The system was designed to support high concurrency, background processing, and scalable deployment. The project focused on automation, reliability, and providing a simple, developer-friendly experience for users who wanted to publish Android apps quickly.
As a full-stack engineer, I worked on the system architecture, back-end logic, and front-end integration. The platform handled user input validation, build configuration, asset processing, and automated APK generation workflows.
I implemented back-end services to manage build jobs, configuration presets, and error handling, ensuring reliable and repeatable APK builds. On the front-end side, I developed interfaces for uploading HTML projects, configuring build options, and tracking build progress.
The system was designed to support high concurrency, background processing, and scalable deployment. The project focused on automation, reliability, and providing a simple, developer-friendly experience for users who wanted to publish Android apps quickly.
Gauge Automotive | Car Bidding Platform
https://stockupsolutions.com/A web-based car bidding platform that allows users to browse vehicles, participate in auctions, and place bids in real time.
As a full-stack developer working on both front- and back-end features, on the back-end side, I implemented APIs to support vehicle listings, auction logic, bid validation, and user interactions. The system handled time-based auctions, bid ordering, and basic access control.
On the front end, I built React interfaces to display vehicle details, current bids, and auction status updates. The UI was designed to handle frequent data updates and provide a clear, responsive bidding experience.
The project required close collaboration with product stakeholders to translate business requirements into reliable technical solutions. The primary focus was on the correctness of the bidding logic, system stability, and delivering a smooth user experience during active user interaction.
As a full-stack developer working on both front- and back-end features, on the back-end side, I implemented APIs to support vehicle listings, auction logic, bid validation, and user interactions. The system handled time-based auctions, bid ordering, and basic access control.
On the front end, I built React interfaces to display vehicle details, current bids, and auction status updates. The UI was designed to handle frequent data updates and provide a clear, responsive bidding experience.
The project required close collaboration with product stakeholders to translate business requirements into reliable technical solutions. The primary focus was on the correctness of the bidding logic, system stability, and delivering a smooth user experience during active user interaction.
Yerevan Life | Real-time Venue and Social Interaction Platform
A location-based social platform that allows users to discover pubs, clubs, and venues across the city and connect with other people who are physically present at the exact location.
The system was designed so that users could scan a QR code inside a venue, automatically open the application, and join a real-time space associated with that location. Once inside, users could see and interact with others currently at the same venue, enabling live social connections and engagement.
As a full-stack engineer, I worked on the overall system design and implementation. On the back end, I built services to manage venues, QR-based access, live user presence, and the session lifecycle. The system handled real-time connections, user state, and venue-specific logic.
On the front-end side, I developed responsive interfaces for venue discovery, live venue rooms, and user interaction flows using React. The project required careful handling of real-time data, connection state, and performance to ensure a smooth experience during peak venue activity.
This project focused on real-time architecture, location-aware logic, and the development of a scalable foundation for social interaction within physical spaces.
The system was designed so that users could scan a QR code inside a venue, automatically open the application, and join a real-time space associated with that location. Once inside, users could see and interact with others currently at the same venue, enabling live social connections and engagement.
As a full-stack engineer, I worked on the overall system design and implementation. On the back end, I built services to manage venues, QR-based access, live user presence, and the session lifecycle. The system handled real-time connections, user state, and venue-specific logic.
On the front-end side, I developed responsive interfaces for venue discovery, live venue rooms, and user interaction flows using React. The project required careful handling of real-time data, connection state, and performance to ensure a smooth experience during peak venue activity.
This project focused on real-time architecture, location-aware logic, and the development of a scalable foundation for social interaction within physical spaces.
AI Website
https://feedback.appsgeyser.com/I worked on AppsGeyser’s AI Website-to-App flow, a feature that converts a customer’s website into a publish-ready mobile app using an AI-driven setup. I implemented and improved the end-to-end experience: form onboarding, validation, UX logic, and integration between the front-end and back-end services that generate the app draft. I also contributed to stability and performance improvements, fixed edge-case issues, and ensured the flow worked reliably across different website types and publishing scenarios. The result was a smoother user journey, fewer failures during generation, and a more scalable foundation for future AI-powered features.
Production-ready Apple/Google Pay & Stripe Payment System
I built a production-ready Apple Pay integration using Stripe in a Next.js (App Router) application. I implemented secure PaymentIntent handling, domain validation, webhook processing, and proper error management. The solution follows best practices for security, scalability, and clean architecture, ready for real-world SaaS deployment.
Invitify-Invitation & Event Creation Platform
https://invitify.am/I built Invitify as a full-stack platform for creating and managing digital invitations and events. The goal was to make the process simple for users while keeping the system flexible on the back end.
The stack includes Next.js on the front end and NestJS on the back end, with PostgreSQL as the database and AWS for deployment. I designed the API structure, handled data modeling, and built a UI that allows users to generate and preview invitations in real time.
One of the main challenges was keeping the UI responsive while working with dynamic content and templates. I solved this by structuring the front end into reusable components and optimizing data flow between client and server.
Overall, this project reflects how I approach building production-ready SaaS apps, focusing on clean architecture, performance, and user experience.
The stack includes Next.js on the front end and NestJS on the back end, with PostgreSQL as the database and AWS for deployment. I designed the API structure, handled data modeling, and built a UI that allows users to generate and preview invitations in real time.
One of the main challenges was keeping the UI responsive while working with dynamic content and templates. I solved this by structuring the front end into reusable components and optimizing data flow between client and server.
Overall, this project reflects how I approach building production-ready SaaS apps, focusing on clean architecture, performance, and user experience.
AI MiniApp App Builder
https://github.com/serob111/MiniBuilderAI MiniApp App Builder is a platform that allows users to generate fully functional mobile applications from simple text prompts. Instead of just producing static HTML, the system builds complete app structures with UI, logic, and deployable outputs.
The platform is powered by LLMs and a custom back end that processes user intent, generates production-ready code, and renders live previews inside a mobile frame. Users can instantly test their apps and export them as installable APK files.
I designed and built the system end-to-end, including the AI generation pipeline, back-end architecture, and front-end experience. The focus was on making the first interaction feel magical, while keeping the system scalable and clean under the hood.
The platform is powered by LLMs and a custom back end that processes user intent, generates production-ready code, and renders live previews inside a mobile frame. Users can instantly test their apps and export them as installable APK files.
I designed and built the system end-to-end, including the AI generation pipeline, back-end architecture, and front-end experience. The focus was on making the first interaction feel magical, while keeping the system scalable and clean under the hood.
Education
2018 - 2022
Bachelor's Degree in Finance
Armenian State University of Economics - Yerevan, Armenia
Skills
Libraries/APIs
React, Node.js, Context API, Stripe, Zod, Zod Schema, REST APIs, Auth, API Development, OpenAI API, Socket.IO, Stripe API, Framer Motion, React Testing Library, Google Maps, Google Maps API, Vue, Amazon API, Claude API, SendGrid API
Tools
Figma, Git, Claude, Claude Code, NPM, GitLab, Google Analytics, GitHub, Jira, AWS IAM, Webpack, Bitbucket, Sentry, Firebase Authentication, Capacitor, Notion, Jenkins, NGINX, Prisma, Composer, Expo, Nessus
Languages
JavaScript, TypeScript, GraphQL, CSS, HTML, CSS3, HTML5, Modern JavaScript, SCSS, SQL, ECMAScript (ES6), PHP, Python
Frameworks
Next.js, Jest, JSON Web Tokens (JWT), React Native, Material UI, Yarn, Tailwind CSS, Redux, Express.js, NestJS, Laravel, i18next, Bootstrap, Django
Paradigms
Responsive Web Design (RWD), UI Design, Microservices, Refactoring, Web Application Architecture, REST, Role-based Access Control (RBAC), Back-end Architecture, Search Engine Optimization (SEO), API Architecture, REST API Architecture, Mobile Design, Microfrontends, Component-based Development, Responsive, Responsive Coding, Unit Testing, Mobile Development, Testing, Agile Software Development, Code Refactoring, Hosting
Platforms
Vercel, Firebase, Mixpanel, Docker, Amazon Web Services (AWS), Amazon EC2, iOS, Contentful, Twilio, WordPress, Android
Storage
PostgreSQL, JSON, MySQL, Database Migration, Databases, Data Validation, MongoDB, Redis, Amazon S3 (AWS S3), NoSQL
Industry Expertise
Web Design, Healthcare
Other
Supabase, APIs, Full-stack, API Integration, Architecture, AI-generated Code, Vite, Full-stack Development, Consumer-facing Products, Apple Pay, Google Pay, AI Integration, Authentication, Deployment, React Hooks, Performance Optimization, Back-end Development, TypeORM, Software Architecture, Code Review, OpenAI, AI Architecture, AI Agents, Page Speed Optimization, Server-side Rendering (SSR), Static Site Generators, API Management, Back-end, OAuth, full stack JavaScript, Dashboards, Front-end, UI Animation, User Experience (UX), Legacy Code, Data Masking, Error Handling, Integration, Minimum Viable Product (MVP), User Interface (UI), Front-end Development, Migration, Design Systems, Front-end Architecture, SaaS, UI Development, End-to-end Implementation (E2E), Figma to React, Prompt Engineering, Third-party APIs, JSON REST APIs, Coding, Web Development, User Roles, SSG, Dynamic Routing, Responsive Design, Multilingual Websites, Software, Software Development, Application State Management, Authorization, DOM, RESTFul APIs, Supabase Auth, RESTful Web Services, Web App Development, Scalability, Systems Design, Agentic Coding, API Design, Landing Pages, Google Analytics 4 (GA4), Integrations, Responsive UI, Zustand, AI-assisted Development, Technical Leadership, WebSockets, Payment APIs, Payment Security, Payments, Security, Webhooks, CI/CD Pipelines, GitHub Actions, Cloudflare, Lovable, AI Tools, Artificial Intelligence (AI), Vibe Coding, Cloud, Cursor AI, Firebase Cloud Functions, Scalable Architecture, Data Engineering, Data Modeling, Multi-tenant SaaS, Quality Assurance (QA), Agentic AI, Mobile Apps, Startups, Product Management, Core Web Vitals, Platforms, Fintech, CRM, Customer Relationship Management (CRM), QR Codes, ChatGPT API, Payment Gateways, PayPal, Headless WordPress, Backups, Code Deployment, Debugging, Secure Coding, DocumentDB, Amazon DocumentDB, SEO Tools, Mobile App Development, Vector Databases, LLM Integration, AI Agent Orchestration, Retrieval-augmented Generation (RAG), eCommerce, Monday.com, Agentic RAG Systems, RAG Systems, RAG Architecture, FastAPI, Leadership, Finance, Apollo Server, Computer Vision, HTTP, HTTPS, Large Language Models (LLMs), DocuSign, Docuseal, BullMQ, Workers, HIPAA
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