Senior Frontend Engineer with 9+ years of experience building, scaling, and modernizing web applications in cross-functional, agile environments. Proven track record in leading frontend architecture initiatives, mentoring engineers, and driving engineering best practices such as monorepo adoption, shift-left testing, CI/CD automation, and design systems based on Atomic Design. Extensive experience with React, Next.js, TypeScript, Nx, and modern UI frameworks, alongside legacy system maintenance and migrations. Strong advocate for clean code, performance optimization, analytics, and developer experience, with hands-on leadership in greenfield projects, internationalized products, and enterprise-grade tooling. Experienced in collaborating closely with product, design, and data teams while continuously improving engineering workflows, reliability, and scalability.…

serranoedwin01

Senior Frontend Engineer with 9+ years of experience building, scaling, and modernizing web applications in cross-functional, agile environments. Proven track record in leading frontend architecture initiatives, mentoring engineers, and driving engineering best practices such as monorepo adoption, shift-left testing, CI/CD automation, and design systems based on Atomic Design. Extensive experience with React, Next.js, TypeScript, Nx, and modern UI frameworks, alongside legacy system maintenance and migrations. Strong advocate for clean code, performance optimization, analytics, and developer experience, with hands-on leadership in greenfield projects, internationalized products, and enterprise-grade tooling. Experienced in collaborating closely with product, design, and data teams while continuously improving engineering workflows, reliability, and scalability.…

Available to hire

Senior Frontend Engineer with 9+ years of experience building, scaling, and modernizing web applications in cross-functional, agile environments. Proven track record in leading frontend architecture initiatives, mentoring engineers, and driving engineering best practices such as monorepo adoption, shift-left testing, CI/CD automation, and design systems based on Atomic Design. Extensive experience with React, Next.js, TypeScript, Nx, and modern UI frameworks, alongside legacy system maintenance and migrations. Strong advocate for clean code, performance optimization, analytics, and developer experience, with hands-on leadership in greenfield projects, internationalized products, and enterprise-grade tooling. Experienced in collaborating closely with product, design, and data teams while continuously improving engineering workflows, reliability, and scalability.

See more

Skills

Experience Level

JavaScript
Expert
React JS
Expert
Tailwind
Expert
TypeScript
Expert
CSS
Expert
HTML5
Expert
AI Chatbot
Expert
Figma
Intermediate
GitHub CoPilot
Intermediate
Hotjar
Intermediate

Language

English
Fluent
Spanish; Castilian
Advanced
German
Beginner

Work Experience

Assistant Web Developer at Raritan Valley Community College
August 1, 2015 - October 1, 2016
-Migration of former website from Sharepoint 2010 to Sharepoint 2013 -Manage Active Directory for Content Management System -Providing Technical Assistance for College Staff/Faculty
Frontend Developer at bonify
January 25, 2018 - September 30, 2021
-Migrate former custom wordpress site to headless CMS using Reactjs and Nextjs/Expressjs for an isomorphic site to optimize SEO, Prismic as CMS, Segment customer data platform as a proxy for data/analytical gathering of user behavior part of a data engineering project -Development of a components library using storybook to share across multiple sites for a seamless better ui experience and faster development cycles -Optimize current legacy code consisting of Reactjs component lifecycles with Redux as state management for the B2C platform to the latest technologies such as React context and React hooks, Single-Sign-On JSON Web Token authentication protocol, and introducing the clean code principle -Maintain and improve the B2B SaaS, consisting of Reactjs and storybook and Typescript, with minimal effort while integrating white label solutions using the clean code principle -Early stages of end-to-end integration testing while keeping current unit testing Jest -Advise, assist, and maintain the analytical/user behavioral systems such as Google Analytics for the marketing team and data solutions team as not to violate the General Data Protection Regulation -Working with a cross-functional team in a kanban board to develop and provide a POC at a reasonable timeframe
Senior Frontend Engineer at Billie GmbH
October 1, 2021 - April 30, 2025
-Working in an autonomous cross-functional team using the SCRUM method to develop, test, and deliver in a reasonable timeframe -Mentor developers using knowledge sharing, open feedback and critique method -Assist, maintain, and integrate the product for internationalization -Advocate and advisor for the analytical/user behavioral systems -Initiate the early stages of an internal Design System using Storybook -Migration from a monolith to mono-repository using the Nx Build Framework methodology, Layered Design, and Design Patterns in software design whilst maintaining a high standard -Refactored legacy code to follow industry standards and latest technologies such as the clean code principle, KISS, TypeScript, Redux, Reactjs, React Hooks, React Context, ESLint, and Babel whilst improving performance -Follow BEM methodology for CSS/SCSS -Switched from Shift-right to Shift-left testing -Successfully and effectively integrated end-to-end tests using Cypress -Maintenance of the CI/CD pipeline using Github Actions and Jenkins -Responsible for the frontend SRE using Sentry and NewRelic -Initiate the early stages of company wide document generator using Gotenberg API and HTML/CSS
Senior Frontend Engineer at Stackfuel GmbH
July 1, 2024 - March 31, 2025
-Working in a cross-functional team using the SCRUM method to develop, test, and deliver in a reasonable timeframe -Mentor developers using knowledge sharing, open feedback, pair programming, and critique method -Advocate and advisor for an improved mono-repository architecture -Initiate and foster a more mature internal Design System with concrete styleguide using the Atomic Design pattern -Maintain a Shift-left testing approach -Initiated the early stages for incorporating AI into everyday workflows in the engineering department -Advocated for an engineering wide third party tool decision framework -Released a greenfield project using Nextjs, Nx, TypeScript, keycloak, OAuth, Chakra-UI, Tailwind, Shadcn, and Tanstack Query while maintaining legacy Wordpress CMS system -Automated the merge request pipeline to reduce manual mental load
Senior Frontend Engineer at Elevion Green GmbH
April 1, 2025 - Present
- Maintained and enhanced existing web applications built with Next.js, TypeScript, TailwindCSS, TanStack Query, Playwright, Next-Intl, and AI integrations using Vercel AI SDK and OpenAI Node SDK. - Led the initiation and implementation of a company-wide Design System using TailwindCSS, following the Atomic Design methodology to ensure scalability and consistency. - Designed and implemented large-scale, data-intensive forms to support photovoltaic (PV) sales data collection. - Proactively introduced improvements to development processes, coding conventions, and team events to enhance collaboration and delivery efficiency. - Significantly improved the platform’s internationalization (i18n) and localization (l10n) capabilities to support global users. - Integrated a white-label SaaS file management solution, enabling scalable and secure document handling. - Standardized the developer experience by enforcing tooling, best practices, and automated workflows using Azure DevOps. - Acted as an AI advocate, promoting and integrating AI-powered developer tools (e.g., Cursor) into daily development workflows. - Took ownership of integrating LLM providers (such as OpenAI) into data processing pipelines to support AI-driven features. - Developed a multi-tenant sales data form to support a global product launch across multiple markets. - Improved overall platform architecture by transitioning to a containerized, feature-module–based approach, increasing modularity and maintainability.

Education

Associates of Applied Science in Information Systems & Technology at Raritan Valley Community College
August 1, 2011 - May 1, 2016
Associates of Applied Science in Computer Programming at Raritan Valley Community College
August 1, 2011 - May 1, 2016

Qualifications

Add your qualifications or awards here.

Industry Experience

Energy & Utilities, Financial Services
    paper Greenfield Project - Learning Platform

    Released a greenfield project using Nextjs, Nx, TypeScript, keycloak, OAuth, Chakra-UI, Tailwind, Shadcn, and Tanstack Query while maintaining legacy Wordpress CMS system

    paper Monolith Migration

    Migration from a monolith to mono-repository using the Nx Build Framework methodology, Layered Design, and Design Patterns in software design whilst maintaining a high standard

    paper Sharepoint Migration

    Migration of former website from Sharepoint 2010 to Sharepoint 2013

    paper Marketing Website Migration

    Migrate former custom wordpress site to headless CMS using Reactjs and Nextjs/Expressjs for an isomorphic site to optimize SEO, Prismic as CMS, Segment customer data platform as a proxy for data/analytical gathering of user behavior part of a data engineering project