Mid/Senior Frontend Developer
Sensor Tower1 month ago
Lisbon, PortugalMid Level / Senior
Responsibilities
- Architect and deliver complex, scalable frontend systems while reducing unnecessary codebase complexity.
- Partner with Product Managers to define requirements and ensure engineering feasibility during ideation.
- 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.
- Drive best practices in React, TypeScript, and web performance optimization.
- Collaborate with Data Science and Backend Engineers to support seamless data flow and end-to-end reliability.
Requirements
- 4+ years of software engineering experience with deep specialization in modern JavaScript, TypeScript, and React.
- Ability to architect complex state-management systems and adapt principles across libraries and frameworks.
- Ability to design maintainable systems that handle complexity effectively.
- Experience mentoring peers and elevating engineering practices through code reviews and teaching.
- Experience writing robust and efficient unit and integration tests.
- Deep understanding of web performance, browser internals, and optimization for data-heavy applications.
- Product-oriented mindset with the ability to challenge requirements and propose solutions that improve business outcomes and user experience.
- Preferred experience with data visualization, large datasets, DOM-heavy applications, or Highcharts.
- Preferred portfolio, GitHub history, or technical writing demonstrating clean code and architectural problem-solving.
- Preferred familiarity with Ruby on Rails, Angular, ClickHouse, MongoDB, and PostgreSQL.
- Knowledge of AI-driven coding tools and models is advantageous.
Benefits
- Flexible work environment.
- Global teams across North America, Europe, the Middle East, Africa, APAC, and LATAM, with regional offices in San Francisco, Los Angeles, New York, London, Singapore, Beijing, Seoul, Tokyo, and Vancouver.
Tech Stack
Categories