Senior Frontend Engineer

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We build and operate Connect, a SaaS platform for the beauty & wellness industry that helps entrepreneurs run their businesses more effectively. Our web products are used daily by tens of thousands of people across 13 European countries. Our teams own their areas from initial idea and design through deployment and operations. We focus on writing maintainable, scalable code while balancing legacy and modern technologies. We encourage engineers to experiment with new ideas, learn from mistakes, and improve our systems continuously.

You will be responsible for:

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- Take ownership of the frontend experience from design to deployment to operations.
- Pair with engineers, designers, and PMs to ship features every cycle, iterating based on real usage and feedback.
- Participate in design and code discussions, making trade-offs and decisions that affect the product and the team.
- Maintain a strong focus on automated testing,



applying the testing pyramid to ensure unit, integration, and end-to-end coverage.
- Improve our frontend observability by adding metrics, dashboards, and alerts with tools like Datadog, Sentry, and web vitals to catch issues before they impact users.
- Be an active part of the Frontend Guild, collaborating with other engineers to share ideas, improve standards, and tackle cross-team frontend challenges.
- Lead technical discussions about trade-offs in features, architecture, and UX, helping the team make informed decisions that balance product goals and engineering constraints.
- Navigate a hybrid codebase, balancing work between legacy systems and modern React/TypeScript.

Our frontend stack:
The frontend stack is a mix of legacy and modern technologies. The application originally grew as a Backbone-based product, served through Node/Express with EJS templates, and there are still important area

📌 Senior Frontend Engineer (España)
🏢 Treatwell
📍 España