Mid/Senior Frontend Developer
Sensor Tower3 months ago
London, United KingdomMid Level / Senior
Responsibilities
- Architect and deliver scalable, maintainable frontend systems.
- Partner with Product Managers to define requirements, scope, and technically feasible solutions.
- Lead technical decisions and successful delivery for medium-to-large features.
- Mentor junior and mid-level engineers through code reviews and pair programming.
- Identify and resolve frontend bottlenecks, technical debt, and systemic issues.
- Advocate for React, TypeScript, and web performance best practices.
- Collaborate with Data Science and Backend Engineers on seamless data flow and system reliability.
- Develop data visualization and analytics experiences when needed.
Requirements
- 4+ years of software engineering experience with deep specialization in modern JavaScript, TypeScript, and React.
- Experience architecting complex state management systems and adapting across state-management libraries.
- Ability to design maintainable systems that manage complexity effectively.
- Experience teaching peers and elevating engineering practices through reviews and mentorship.
- Proficiency writing robust unit and integration tests with tools such as Jest or Playwright.
- Deep understanding of web performance, browser internals, and optimization for data-heavy applications.
- Product-oriented judgment, including the ability to challenge requirements and propose better solutions.
- Preferred experience with data visualization, large datasets, DOM-heavy interfaces, and Highcharts.
- A portfolio, GitHub history, or technical writing demonstrating clean code, design sensibility, and architectural problem-solving is preferred.
- Familiarity with Ruby on Rails, Angular, ClickHouse, MongoDB, PostgreSQL, and AI-driven coding tools or models is a plus.
Benefits
- Flexible work environment with global teams across North America, Europe, the Middle East, Africa, APAC, and LATAM.
- Flexible time off.
- Health and wellness stipend.
- Monthly internet stipend.
- One-time $500 home office stipend.
Tech Stack
Categories
About Sensor Tower
Sensor Tower provides a digital intelligence platform that tracks market trends, app performance, web traffic, and advertising across mobile, web, and gaming for brands, publishers, and investors. It sells subscription SaaS products spanning App Intelligence, Audience & Web insights, and Digital Advertising Insights (formerly Pathmatics). Founded in 2013 and headquartered in San Francisco, its datasets are used by more than 2,500 enterprises across sectors to benchmark competitors and guide growth and investment decisions.