> Markdown version of [/jobs/ext/3557143-senior-frontend-engineer-in-mundelein](https://www.wearedevelopers.com/jobs/ext/3557143-senior-frontend-engineer-in-mundelein). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md).

---

# Senior Frontend Engineer in Mundelein

- **Company:** Energy Jobline
- **Location:** Mundelein, IL, United States
- **Experience:** Expert
- **Salary:** $125,000.0 - $140,000.0
- **Contract:** Permanent contract
- **Skills:** Agile Methodology, Big Data, Code Review, Data as a Services, Dependency Injection, Scrum Methodology, E2e Testing, Angular 2+, Responsive Web Design, TypeScript, Web Applications, Web Performance Optimization, RxJS, AngularJS, Data Analytics, Front End Software Development, Restful APIs
- **Published:** October 2, 2026
- **Apply:** https://www.energyjobline.com/job/senior-frontend-engineer-mundelein-31817373

## About the Role

* 5-7+ years of professional experience developing modern web applications, with at least 3-5 years of hands-on experience developing production applications with Angular.
\n

 * Deep expertise in Angular (Angular 2+) and TypeScript, including RxJS, signals, dependency injection, change detection, the Angular component lifecycle, routing, forms, and component architecture.
\n

 * Proven track record designing and building complex, data-driven Angular applications and user interfaces at enterprise scale.
\n

 * Experience integrating front-end applications with RESTful APIs and asynchronous data services.
\n

 * Strong analytical and problem-solving skills, with the judgment to make sound architectural trade-offs under ambiguity.
\n

 * Demonstrated ownership of Angular and front-end architecture, including component design, code organization, reusable patterns, and long-term maintainability at scale
\n

 * Strong understanding of user experience (UX) principles, accessibility standards, and responsive design.
\n

 * Experience mentoring engineers and leading code reviews, technical design discussions, or architecture decisions, with a strong focus on Angular development and front-end engineering practices.
\n

 * Excellent communication and collaboration skills, with the ability to influence technical direction across technical and non-technical teams.
\n

 * Self-motivated, adaptable, and able to independently drive projects and technical direction in a fast-paced environment.
\n

 * Strong command of automated testing frameworks and front-end testing methodologies, including unit, integration, and end-to-end testing for Angular applications.
\n

 * Experience with Angular and front-end performance profiling and optimization for large-scale, data-intensive applications.
\n

 * Experience working in Agile or Scrum development environments.
\n