**Work Schedule**
Standard (Mon-Fri)
**Environmental Conditions**
Office
As part of the Thermo Fisher Scientific team, you’ll discover meaningful work that makes positive impact on a global scale. Join our colleagues in bringing our Mission to life every single day to enable our customers to make the world healthier, cleaner and safer. We provide our general teams with the resources needed to achieve individual career goals while helping to take science a step beyond by developing solutions for some of the world’s toughest challenges, like protecting the environment, making sure our food is safe or helping find cures for cancer.
**About the Role**:
We’re looking for a skilled Mid-Level Frontend Engineer to drive the development and evolution of our Design System. In this role, you’ll collaborate with a team of UX/UI designers and engineers to build scalable, high-performance UI components using Web Components and modern frontend technologies. If you’re passionate about crafting reusable, efficient code and thrive in a fast-paced, collaborative environment, we’d love to hear from you!
**Key Responsibilities**:
- Build and optimize Web Components using tools like StencilJS or Lit.
- Write clean, maintainable code with HTML, CSS, JavaScript, and TypeScript.
- Integrate components into frontend frameworks, with a preference for Angular (React or Vue.js experience also welcome).
- Optimize styling with CSS preprocessors like Sass or Less.
- Set up unit tests (e.g., Jest) and UI tests (e.g., Playwright or Selenium) to ensure component reliability.
- Manage dependencies and build processes using Node.js and NPM.




- Ensure cross-browser compatibility, performance optimization, and alignment to accessibility (a11y) standards.
- Collaborate with designers to implement their vision accurately and efficiently, providing input on feasibility when needed.
- Contribute to CI/CD pipelines using GitHub Actions and maintain version control with Git.
- Leverage AWS (e.g., CloudFront) for deployment and performance improvements.
**What We’re Looking For**:
- ** Experience**: 3-5 years of frontend development experience, with a focus on building reusable UI components.
- ** Core Skills**: Strong proficiency in HTML, CSS, JavaScript, and TypeScript.
- ** Web Components**: Experience with StencilJS, Lit, or similar Web Component libraries (or a strong willingness to learn).
- ** Frontend Frameworks**: Hands-on experience with Angular (preferred), React, or Vue.js.
- ** Styling**: Proficiency with CSS preprocessors like Sass or Less.
- ** Testing**: Experience with testing frameworks such as Jest, Playwright, or Selenium.
- ** Build Tools**: Proven understanding of Node.js, NPM, and frontend package management.
- ** Technical Expertise**: Knowledge of cross-browser compatibility, performance optimization, and accessibility standard processes.
- ** Collaboration**:



Ability to work closely in an agile, scrum environment.
**Nice to Have**:
- Previous experience maintaining or contributing to a design system.
- Familiarity with AWS (e.g., CloudFront) for deployment or performance optimization.
- Experience with enterprise-scale UI projects or server-side rendering (SSR).
- Exposure to advanced JavaScript patterns or performance profiling tools.
**Technologies You’ll Work With**:
- ** Languages**: HTML, CSS, JavaScript (advanced), TypeScript
- ** Frameworks**: Angular (preferred), React, Vue.js
- ** Web Components**: StencilJS, Lit
- ** Styling**: Sass, Less
- ** Build Tools**: Node.js, NPM
- ** Testing**: Jest, Playwright, Selenium
- ** Cloud & Deployment**: AWS (CloudFront)
- ** CI/CD & Version Control**: GitHub Actions, Git
Our Mission is to enable our customers to make the world healthier, cleaner and safer.
As one team of 100,000+ colleagues, webshare a common set of values - Integrity, Intensity, Innovation and Involvement - working together to accelerate research, address complex scientific challenges, drive technological innovation and support patients in need. #StartYourStory at Thermo Fisher Scientific, where diverse experiences, backgrounds and perspectives are valued.
Thermo Fisher Scientific is an EEO/Affirmative Action Employer and does not discriminate on the basis of race, color, religion, sex, sexual orientation, gender identity, national origin,
protected veteran status, disability or any other legally protected status.
**Accessibility/Disability Access**:

📌 UI Developer (Tijuana)
🏢 Thermo Fisher Scientific
📍 Tijuana