Senior Frontend Engineer: Build Scalable, Fast UIs

Sensor Tower; Kraków; On-site; PLN 120,000 - 150,000; Full time

Job summary

Sensor Tower is looking for a skilled Frontend Engineer to architect and deliver scalable frontend systems while mentoring junior engineers. You will shape the technical direction of our product, collaborating closely with Product Managers and Data Science teams.

The ideal candidate has 4+ years of experience, strong skills in JavaScript, TypeScript, and React, and a mindset focused on product development. Join us in a supportive and collaborative environment.

Qualifications

• 4+ years experience in software engineering focused on JavaScript and React.
• Proven ability to architect complex state management solutions.
• Experience with unit and integration tests frameworks like Jest or Playwright.

Responsibilities

• Architect and deliver scalable frontend systems.
• Lead technical decision-making for scoped features.
• Mentor junior engineers through code reviews and training.

Skills

JavaScript

TypeScript

React

Web Performance Optimization

State Management

Tools

Jest

Playwright

TanStack Query

Redux

MobX

NextJS

Job description

Sensor Tower is looking for a skilled Frontend Engineer to architect and deliver scalable frontend systems while mentoring junior engineers. You will shape the technical direction of our product, collaborating closely with Product Managers and Data Science teams.

The ideal candidate has 4+ years of experience, strong skills in JavaScript, TypeScript, and React, and a mindset focused on product development. Join us in a supportive and collaborative environment.