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Julian Sosa

@juliansosa

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Senior Frontend Engineer specializing in React, Next.js and TypeScript.

United States

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What I'm looking for

I’m looking to join a focused product team where craft and autonomy matter. I want to lead frontend architecture and design-system work, ship production features fast, and collaborate closely with design and backend teams.

I’m a Senior Frontend Engineer with 10+ years building scalable web applications for global brands and product startups. I specialize in React, Next.js, and TypeScript, with hands-on experience across the Angular, AEM, and Astro ecosystems.

I’m comfortable connecting frontends to Node.js backends and integrating REST and GraphQL APIs and services like Supabase, Resend, PostgreSQL, and MongoDB. I’ve shipped real products under real constraints, from component libraries and design systems to authentication flows and production deployments on AWS, Vercel, and GitHub Actions.

I’ve led distributed teams and proposed technical architectures from scratch—most recently coordinating frontend squads and improving delivery rhythm by proposing Kanban workﬂows. I architected a component library system defining standards for 5+ client projects, establishing composition patterns and TypeScript interfaces that enabled scalability across 50+ engineers.

I’m also deeply hands-on with design and handoff using Adobe Photoshop and Figma, contributing to UI decisions alongside design teams. I’m looking to contribute to a focused product team where craft and autonomy matter.

Experience

Work history, roles, and key accomplishments

Senior Frontend Engineer - Team Lead

Publicis Global Delivery

Oct 2023 - Dec 2025 (2 years 2 months)

Led frontend development for Post Malone and Oreo interactive campaign, shipping an OpenAI-powered quiz that generated personalized user profiles for a global audience. Architected a component library system across 5+ client projects and scaled delivery for teams of 50+ engineers, delivering Pfizer, American Express, and Thrivent Bank experiences with 2–5 day turnaround cycles.

Next.js React TypeScript PHP SASS Vercel Storybook Litmus

Senior Frontend Engineer

Cedar Systems

Dec 2021 - Mar 2023 (1 year 3 months)

Helped launch a B2B pest control SaaS across web and mobile, proposing and building a React Native MVP from scratch and setting up Xcode/TestFlight for internal distribution and QA. Developed a real-time dashboard with 10+ Chart.js visualizations and built SendGrid-backed email campaign systems with modular component architecture.

React React Native TypeScript Chart.Js Storybook Sendgrid XCode TestFlight

Senior Frontend Developer

HumanTech Innovation

Aug 2020 - Dec 2021 (1 year 4 months)

Served as the frontend reference for AUNA product squads, building a reusable component library in React, Angular, and Stencil adopted across 5+ web applications and 2+ mobile apps, reducing per-feature UI development time by 50%+. Developed React Native component libraries for cross-platform consistency and shipped accessible, SEO-focused Next.js landing pages with CSR/SSR optimization.

React Angular React Native Stencil Next.js TypeScript Storybook Accessibility

Frontend Developer

WebCreek

May 2019 - Feb 2020 (9 months)

Led mobile UI development for a cross-platform application built with Angular and Ionic, partnering with web frontend and backend engineers to deliver complete product experiences. Built and maintained React/Angular frontend applications across 5+ SaaS projects using TypeScript, SASS, Bootstrap, and AEM components.