Mid/Senior Front End Developer
Sensor Tower3 months ago
Tallinn, EstoniaMid Level / Senior
Responsibilities
- Architect and deliver complex, scalable frontend systems while reducing unnecessary codebase complexity.
- Partner with Product Managers to define requirements, scope features, and assess engineering feasibility.
- Lead technical decisions and delivery for medium-to-large scoped features.
- Mentor junior and mid-level engineers through code reviews, pair programming, and teaching best practices.
- Own the frontend stack by identifying and addressing bottlenecks, technical debt, and systemic issues.
- Advocate for React, TypeScript, web performance, maintainability, and quality practices across engineering.
- Collaborate with Data Science and Backend Engineers to support seamless data flow and end-to-end reliability.
- Develop robust and efficient unit and integration tests.
- Build data visualization and analytics experiences for large datasets when applicable.
Requirements
- 4+ years of software engineering experience with deep specialization in modern JavaScript, TypeScript, and React.
- Experience architecting complex state management systems and understanding transferable state-management principles.
- Experience with or familiarity with TanStack Query, React Router, Zustand, Redux, MobX, or Next.js.
- Ability to design maintainable systems that handle complexity effectively.
- Experience elevating peers through code reviews, mentoring, and teaching engineering patterns.
- Competence writing 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.
- Experience with data visualization, large datasets, DOM-heavy applications, or Highcharts is preferred.
- A portfolio, GitHub history, or technical writing demonstrating clean code, design awareness, and architectural problem-solving is preferred.
- Familiarity with Ruby on Rails, Angular, ClickHouse, MongoDB, or PostgreSQL is preferred.
- Knowledge of AI-driven coding tools and models is preferred.
Benefits
- Flexible work environment with teams and regional offices across North America, Europe, the Middle East, Africa, APAC, and LATAM.
- Flexible time off.
- Health and wellness stipend.
- Wi-Fi allowance.
- Monthly internet stipend and a 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.