Open to opportunities

Narine Kosyan

@narinekosyan

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Senior full-stack and mobile software developer building high-performance React apps.

Armenia

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What I'm looking for

I’m looking for a role where I can own end-to-end product development across React/React Native and Node.js, deliver smooth high-performance UX, and build reliable backends with strong testing and observability—using modern AI-assisted workflows to move faster.

I’m a senior software developer with 12+ years of experience building high-performance React and React Native applications, plus Node.js backend systems. I own the full product lifecycle—from API design and database schemas to polished, fluid mobile interfaces—and I routinely use AI-assisted workflows (Cursor, Copilot, Claude) to ship faster without compromising code quality.

Recently, I architected and delivered core systems for a secure, non-custodial Web3 crypto wallet using React Native, Expo, WalletConnect, and Realm for high-performance local data caching. I’ve focused on delivering smooth user experiences (eliminating layout stutter and achieving a fluid 60 FPS UI) and improving reliability through Sentry and biometric authentication integration.

Earlier, I built scalable platforms as a Senior Full Stack Developer, including a high-throughput digital commerce platform and a HIPAA-compliant medical weight loss platform used by Health Care Professionals. My background also includes QA and automation work, which keeps my engineering grounded in testing, stability, and practical delivery.

Experience

Work history, roles, and key accomplishments

React Senior Mobile Developer

Fastex Technologies CJSC

Jan 2023 - Apr 2026 (3 years 3 months)

Architected and delivered a secure, non-custodial Web3 crypto wallet app using React Native and related tooling, including high-performance local data caching and smooth cross-platform UI animations. Improved stability and incident response with biometric authentication and Sentry, and accelerated prototyping with AI-assisted development workflows.

React React Native Expo Redux TypeScript Realm lottie WalletConnect Next.js HTML5 CSS3 JavaScript NestJS Sentry GraphQL RESTful Web Services biometric authentication CI CD

Senior Full Stack Developer

Tidepool Labs Europe

Oct 2018 - Jan 2023 (4 years 3 months)

Engineered a scalable, high-throughput digital commerce platform enabling content creators to monetize and deliver digital products globally using React and Node.js. Designed and scaled a HIPAA-compliant medical weight loss platform for securely tracking and optimizing patient outcomes across clinical settings.

React Redux Node PostgreSQL MySQL SQL Server FeathersJS Prisma Sequelize Jest Cursor Copilot ChatGpt GraphQL

Telerik Software Developer

Ogma Inc

Aug 2012 - Sep 2018 (6 years 1 month)

Architected and deployed inventory-focused database structures and interactive tools for a high-traffic online marketplace and music social network. Built reusable internal architecture components, a flexible project management engine, and supported cloud/CI/CD workflows.

C#ASP.NET MVC JavaScript AJAX jQuery SQL Server Silverlight GitHub Actions Vercel AWS S3 AWS EC2 AWS Lambda

QA Engineer

Nairisoft Inc

Sep 2008 - Aug 2012 (3 years 11 months)

Designed and maintained automated test scripts and reusable test frameworks for web applications, web services, Windows applications, and Windows services. Identified and documented defects and collaborated with development teams to ensure software quality across multiple client projects.