Karen Boyakhchyan
Verified Expert in Engineering
Front-end React and Next.js Developer
Yerevan, Armenia
Toptal member since February 24, 2026
Karen is a senior full-stack developer driven by continuous learning and technical growth. He has evolved from building solid front-end foundations to architecting scalable full-stack solutions with React, Next.js, TypeScript, and Node.js. With strong Agile collaboration skills and a product-focused mindset, Karen helps teams deliver reliable, user-centered solutions that drive real business impact.
Portfolio
Experience
- Next.js - 7 years
- TypeScript - 7 years
- Material UI - 7 years
- React - 7 years
- Storybook - 5 years
- RTK Query - 5 years
- Jest - 5 years
- tRPC - 4 years
Preferred Environment
MacOS, Slack, Google, Teams, Zoom, WhatsApp, HTML5, JavaScript
The most amazing...
...project I've developed is a scalable medical SaaS platform serving real clinics with secure, high-performance patient workflows.
Work Experience
Senior Full-stack Developer
Online Freelance Agency
- Developed interactive and responsive user interfaces using React, leveraging its component-based architecture and state management capabilities to create dynamic web applications.
- Implemented back-end solutions with the .NET Framework to ensure robust data processing and integration, harnessing its powerful framework for building scalable APIs and services.
- Styled applications with Tailwind CSS, utilizing its utility-first approach to streamline design processes and achieve consistent, modern UI across platforms.
- Enhanced code quality and maintainability using TypeScript, ensuring type safety and improving developer productivity within the front-end and back-end environments.
- Deployed and managed applications on Microsoft Azure, leveraging its cloud services for scalable hosting, storage, and continuous integration/delivery (CI/CD) pipelines.
- Integrated ServiceStack to simplify and accelerate development of RESTful APIs, leveraging its built-in features for authentication, caching, and serialization.
- Managed and optimized relational databases using SQL Server Management Studio (SSMS), ensuring efficient data storage, retrieval, and management for applications.
Software Engineer
EPAM Systems
- Designed and developed the core functionality of various eCommerce applications.
- Managed complex application states efficiently with Redux, implementing centralized stores to maintain predictability and scalability across large-scale applications.
- Implemented features for managing ad campaigns, keyword research, and bid optimization.
- Worked on front-end development using HTML, CSS, JavaScript, TypeScript, React, and Next.js.
- Contributed to the back-end development using Express.js, Node.js, TypeScript, TypeORM, and PostgreSQL.
- Collaborated with the team to define technical requirements and ensure the timely delivery of the product.
- Conducted testing and debugging to ensure the stability and reliability of the service.
- Guided the design team to ensure responsive and user-friendly interfaces.
- Streamlined and optimized the service based on user feedback and market trends.
Front-end Developer
FH Health (Pollin Fertility)
- Spearheaded the design and development of core functionalities for eCommerce applications.
- Leveraged HTML, CSS, JavaScript, TypeScript, React, and Next.js to drive front-end development initiatives.
- Collaborated with cross-functional teams to define technical requirements and ensure timely project delivery.
- Directed design efforts to ensure responsive and user-friendly interfaces.
- Refined and optimized applications based on user feedback and market trends.
- Utilized Firebase to develop and deploy real-time features, leveraging its scalable database and authentication services to enhance user interactions.
- Facilitated smooth developer onboarding by providing comprehensive examples, use cases, and references within the API contract documentation.
Experience
Medical Platform for Artificial Fertility
https://www.pollinfertility.com/On the front end, I built responsive, high-performance interfaces with a strong focus on UX and accessibility. On the back end, I designed robust APIs and integrated Firebase services for real-time features, authentication, and scalable data handling.
I collaborated closely with designers, product managers, and back-end engineers to define technical requirements, plan sprints, and deliver features on time. Additionally, I improved developer experience by creating detailed API contract documentation, examples, and onboarding guides, enabling faster team ramp-up and more consistent implementation across projects.
Qatar Development Bank
I collaborated closely with back-end engineers and stakeholders to translate complex financial workflows into intuitive digital experiences. My responsibilities included integrating APIs, optimizing performance, and maintaining a clean, modular architecture to support long-term scalability.
Through active participation in Agile ceremonies, sprint planning, and technical discussions, I helped deliver high-quality features on schedule while continuously improving code quality, documentation, and overall system reliability.
MEDFAR Clinical Solutions
https://www.medfarsolutions.com/en-us/I designed and optimized PostgreSQL schemas using TypeORM, focusing on data integrity, performance, and scalability for complex healthcare workflows. My work included implementing secure authentication flows, role-based access control, and high-performance patient dashboards.
Collaborating closely with product managers, QA, and cross-functional teams in an Agile environment, I helped deliver reliable, maintainable, and scalable solutions that supported daily operations for healthcare professionals.
Education
Bachelor's Degree in Cyber and Information Security
National Polytechnic University of Armenia - Yerevan, Armenia
High School Diploma in Informatics and Applied Mathematics
Mathico – Advanced Math School - Yerevan, Armenia
Certifications
C# Basics for Beginners: Learn C# Fundamentals by Coding
Udemy
Certified React Developer
Simplilearn
Certified React Developer
HackerRank
Certified Front-end Developer (React)
HackerRank
Digital Engagement Practice
Epam Systems
Skills
Libraries/APIs
React, Node.js, React Hook Form, React Testing Library, REST APIs, GraphQL API, MathGL, Yup, React Query, Redux Form
Tools
RTK Query, Webpack, Git, Shadcn, Amazon CloudWatch, Claude, Claude Code, Codex, Slack, Zoom, NPM, GitHub, AI SDK, TanStack Router, Jenkins, Figma, Redux Thunk, Redux Toolkit, Sequelize, JavaScript Testing, Jira
Languages
HTML, CSS3, CSS, SCSS, JavaScript, TypeScript, TypeScript 5, HTML5, GraphQL, Python, C++, C#, SQL, Sass, C#.NET, Modern JavaScript, JavaScript 6, JavaScript 5
Frameworks
Next.js, Material UI, Tailwind CSS, Jest, React Native, tRPC, Express.js, Agentic Frameworks, JSON Web Tokens (JWT), Django, Yarn, .NET, Cypress, Redux, Dojo, NestJS, Swagger, JavaScriptCore, Sitecore JSS
Platforms
MacOS, Firebase, Vercel, Google Cloud Platform (GCP), AWS Lambda, Amazon Web Services (AWS), Docker, Kubernetes, Azure, HubSpot, Storyblok
Storage
Google Cloud, PostgreSQL, Databases
Paradigms
Test-driven Development (TDD), Role-based Access Control (RBAC), Real-time Systems, REST, Design Patterns, Agile, Model Context Protocol (MCP)
Other
Storybook, Front-end Development, Front-end, Pixel Perfect, User Experience (UX), User Interface (UI), AI Tools, Application State Management, Vite, RESTFul APIs, Content Management Systems (CMS), WCAG 2, API Integration, Supabase, Page Speed Optimization, Sitecore, Full-stack, Authentication, Marketplaces, SaaS, Security, Deployment, Full-stack Development, Architecture, Migration, FastAPI, Google, Teams, WhatsApp, Cybersecurity Operations, Physics, Informatics, Applied Mathematics, General Studies, Sanitizers, Code Editor, Tailwind UI, Enzyme, Argo CD, CI/CD Pipelines, APIs, React Hooks, Cursor AI, TypeORM, Team Management, Experience Editor, Artificial Intelligence (AI), Web Content Accessibility Guidelines (WCAG), WebSockets, OAuth
How to Work with Toptal
Toptal matches you directly with global industry experts from our network in hours—not weeks or months.
Share your needs
Choose your talent
Start your risk-free talent trial
Top talent is in high demand.
Start hiring