Senior Frontend Developer (Core)

This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Senior Frontend Developer (Core) based in Brazil.

This is a senior-level engineering role focused on building and evolving large-scale, user-facing web applications that connect millions of people across global markets. You will work at the core of complex frontend systems, shaping architecture, performance, and user experience across high-traffic products used internationally. The role combines hands-on React development with technical leadership, where you will design scalable solutions, refactor existing systems, and ensure smooth, high-performance user interactions. You will collaborate with distributed, multicultural teams in a fully remote environment, contributing to products that directly impact how people connect and interact online. The environment is fast-moving, product-driven, and highly collaborative, with a strong emphasis on autonomy, ownership, and engineering excellence. This role is ideal for a developer who enjoys solving complex frontend challenges at scale while influencing both technical direction and user experience.

• Develop and enhance high-quality frontend features for large-scale web applications using React and TypeScript.
• Refactor and improve existing functionality to ensure maintainability, scalability, and performance across global products.
• Optimize application speed, responsiveness, and overall user experience across different devices and environments.
• Design robust technical solutions and contribute to frontend architecture decisions for complex systems.
• Break down technical requirements into actionable tasks and independently deliver end-to-end implementations.
• Participate in code reviews and uphold high engineering standards across the frontend codebase.
• Collaborate with cross-functional teams to ensure alignment between product goals, UX design, and technical execution.

Requirements

• Several years of professional experience in frontend development, ideally building complex React-based applications at scale.
• Strong proficiency in TypeScript and modern frontend development practices.
• Solid understanding of software design principles, including practical application of SOLID principles.
• Familiarity with Functional Reactive Programming (FRP) concepts, either theoretical or practical.
• Understanding of HTTP(S) and WebSocket protocols and their behavior in real-world applications.
• Ability to independently analyze technical requirements and break them into structured, deliverable tasks.
• Strong awareness of UX/UI principles and how native interface components behave and should feel.
• Experience participating in code reviews and contributing to engineering quality standards.
• Fluent Russian language skills.

Benefits

• Fully remote, full-time work opportunity with global flexibility.
• 28 calendar days of annual vacation.
• 7 additional wellness days per year for rest and personal needs without using sick leave.
• Annual bonuses of up to $5,000 for successful employee referrals.
• 50% reimbursement for professional development, training, and international conferences.
• Corporate discounts for English language learning programs.
• Health-related support of up to $1,000 per year for insurance or medical expenses for you and eligible family members.
• Workplace setup support, including equipment provision or reimbursement for home office/co-working space.
• Internal gamified reward system where employees earn points for recognition and exchange them for perks, merchandise, and experiences.