Senior Frontend Software Engineer

ActiveCampaign • Chicago, IL

4d

About The Position

As our next Senior Frontend Software Engineer, you won't just be building interfaces—you’ll be a vital member of our DUX (Developer and User eXperience) team shaping the frontend platform, improving architecture, developer experience, and the tooling that powers our micro-frontend ecosystem. You will be a key contributor to frontend architecture decisions and help drive platform-level improvements that elevate our entire engineering organization. This isn't just about writing code; it’s about shaping the future of our digital experience and seeing your contributions directly impact our company's trajectory.

Requirements

• 6+ years of hands-on experience with JavaScript, both in the browser and within CLI (Node.js) environments.
• Deep understanding of JavaScript and TypeScript fundamentals (closures, event loop, type narrowing, generics, etc.).
• Strong, proven skills with React, specifically in high-growth environments with rapidly evolving needs.
• Expertise in micro-frontend architectures, including hands-on experience with Module Federation and modern build systems like Nx, Rspack, or Webpack.
• Command of Git and CI/CD pipelines, with a focus on streamlining deployment and ensuring high engineering standards.
• Experience with agentic coding and familiarity with monitoring tools like Grafana (including Faro).
• A quality-driven mindset, featuring a strong focus on testing, ownership, and the ability to iterate repeatedly.
• Data literacy, including at least a basic knowledge of SQL with the ability to write queries for reading and writing data.
• Exceptional collaborative skills, with a proven ability to deliver value while navigating change in a fast-paced setting.

Nice To Haves

• Technical versatility, ideally previous experience with PHP or other backend languages.
• Familiarity with AWS infrastructure, specifically utilizing S3 and CloudFront for efficient build deployment, hosting, and edge caching strategies.

Responsibilities

• Create and evolve new UI based on intricate designs and prototypes, ensuring technical feasibility and aesthetic precision.
• Develop and maintain Design System components to ensure a consistent, scalable, and high-quality user interface across the entire platform.
• Evaluate and optimize performance, meticulously analyzing browser rendering and API data loading to ensure peak efficiency.
• Collaborate cross-functionally with Product, Security, DevOps, DataOps, and SRE teams to drive integrated and influential technical solutions.
• Advocate for excellence by upholding rigorous coding standards, participating in deep code reviews, and mentoring others on best practices.
• Drive operational health by monitoring alerts and escalations to ensure all customer requirements are met with precision.
• Participate in an on-call rotation, ensuring the continuous reliability and stability of our mission-critical applications.

Benefits

• Top-tier benefits package that includes a fully-covered High Deductible Health Plan (HDHP), complimentary access to telehealth services, and a free subscription to Calm.
• Access to LinkedIn Learning, professional development programs, and career growth opportunities in a fast-growing organization.
• Recharge and take the time you need to maintain work-life balance with open PTO.
• Generous 401(k) matching with immediate vesting, quarterly perks with commuter and lunch benefits for hub based employees or a stipend for remote workers, and a four-week paid sabbatical with bonus after five years.

What This Job Offers

• Job Type: Full-time
• Career Level: Mid Level
• Education Level: No Education Listed