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Mid/Senior Frontend Developer

Warsaw, Poland💼 Full-time🗓 2026-06-11 → 2026-09-26

Core

Architect and deliver complex, scalable frontend systems for Sensor Tower's digital intelligence platform, defining technical direction and ensuring intuitive user experiences for enterprise customers.

Role type

Senior Frontend Engineer (IC)

Builds

Scalable frontend applications and complex state management systems for data-heavy analytics and market intelligence products.

Domain

SaaS / Digital Intelligence / Mobile & Web Analytics

Deliverable

production ML models | product features

Required skills

Modern JavaScript, TypeScript, React, System Architecture, State Management, Web Performance Optimization, Unit & Integration Testing, Technical Mentorship

Preferred skills

Data Visualization, Ruby on Rails, Angular, Clickhouse, Postgres, MongoDB, AI-driven coding tools

Technologies

React, TypeScript, TanStack Query, React Router, Zustand, Jest, Playwright, Highcharts, Sidekiq

Responsibilities

Architect complex frontend systems, lead technical decision-making for medium-to-large features, mentor junior engineers, drive web performance optimization, collaborate with Data Science and Backend teams, advocate for best practices.

Seniority

Senior, hands-on IC with architectural leadership

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