Frontend Developer
Senior Frontend Engineer building and maintaining complex UI features in a distributed, agile team. Works with React, TypeScript, JavaScript, HTML/CSS, writes tests, reviews code, and collaborates with product and design to deliver high‑quality, highly available software.
About the Role
As a Sr. Frontend Engineer, you'll work on a distributed team with diverse skills across the tech stack. We build features, enhancements, and experiments and deliver sustainable, quality software in an agile environment. You will also pair up with FEs and implement complex UI features.
What you'll help us achieve
- Write, test, instrument, document, and maintain quality software
- Review code and provide thoughtful, constructive feedback for your team
- Collaborate closely with Product, Design, and other developers to build new features
- Analyze how your features are performing in production to learn and make the product better
- Support a highly available service
Who you are
Experienced Frontend Developer: With more than four years of experience, you're proficient in ReactJS and storybook with a deeper understanding of HTML, CSS, JS & TS. You've built frontend apps at scale.
Performance Expert: Making websites faster is your thing – you can improve performance and keep them that way over time with automated tools.
Testing Champ: You only call it dev-complete with automated tests, ensuring everything works smoothly.
Empathy First: You care about users, crafting experiences that make them smile.
Take the Lead: You're proactive and always ready to go the extra mile.
Agile: You understand how to balance quality & speed by being agile & can shift focus quickly with ease.
Clear Communicator: You're easy to understand, whether talking or writing.
Smart Decision Maker: You use facts and data to make decisions that work.
Great teammate: You believe in growing as a team & are ready to mentor and learn from your colleagues.
Bonus if you have experience with:
Our Tech Stack
User Facing Applications:
Services:
Environment & Infrastructure:
Assembly is an equal opportunity employer. We do not make hiring or employment decisions on the basis of race, religion, color, national origin, gender, gender identity, sexual orientation, age, marital status, veteran status, disability status, or genetic informa
Posted June 25, 2026