Mid/Senior Front End Developer

Role Description

As a Frontend Engineer at Sensor Tower, you will not only build features, you will define how we build them. You will take ownership of major technical components, ensuring our applications are scalable, maintainable, and fast. In our lean and flat organization, your voice will shape the technical direction of our product, helping us deliver an intuitive, fluid user experience that helps our customers understand the digital ecosystem.

• Architect and deliver complex, scalable frontend systems that are simple and effective, removing unnecessary complexity from our codebase.
• Partner with Product Managers to co-author requirements and shape the scope, ensuring engineering feasibility is considered during ideation, not just execution.
• Lead technical decision-making for medium-to-large scoped features, taking responsibility for the successful delivery of value to the customer, not just the completion of tickets.
• Mentor junior and mid-level engineers through code reviews, pair programming, and by instilling quality-first habits across the team.
• Take ownership of the frontend stack by proactively identifying bottlenecks, technical debt, or systemic issues and driving the initiatives to fix them.
• Advocate for and drive best practices in React, TypeScript, and web performance optimization across the engineering organization.
• Collaborate deeply with Data Science and Backend Engineers to ensure seamless data flow and end-to-end system reliability, and use these partnerships to progressively expand your expertise across the full stack.

Qualifications

• 4+ years of software engineering experience with a deep specialization in modern JavaScript, TypeScript, and React.
• Proven ability to architect complex state management.
• Experience elevating the skills of peers.
• Competence in writing robust and efficient unit and integration tests using frameworks like Jest or Playwright.
• Deep understanding of web performance, browser internals, and optimization techniques for data-heavy applications.
• A "Product Owner" mindset, caring deeply about the "why" behind every feature.

Requirements

• Experience with TanStack Query, React Router, and Zustand, or similar libraries like Redux, MobX, NextJS.
• Ability to design systems that handle complexity without becoming complicated, prioritizing long-term maintainability.
• Experience in data visualization and analytics (handling large datasets, heavy DOM manipulation with libraries like Highcharts).
• A portfolio, GitHub history, or technical writing that demonstrates clean code, an eye for design, and the ability to solve complex architectural challenges.
• Familiarity with back end frameworks Ruby on Rails/Angular and different types of DBs (Clickhouse, Mongo, Postgres).
• Knowledge of AI-driven coding tools and models.

Benefits

• Flexible work environment allowing employees to connect with the people, places, and activities they love.
• Global presence with teams across North America, Europe, Middle East, Africa, APAC, and LATAM.