Senior Systems Developer – Frontend – React, Next.js

Role Overview

• Interface Development: Develop modern, scalable, and reusable interfaces using React, Next.js (15+) and TypeScript, with attention to performance, accessibility and visual consistency.
• Frontend Architecture and BFF with Next.js: Design and maintain BFF (Backend for Frontend) layers using native Next.js features, ensuring efficient data orchestration, security and optimized traffic between frontend and backend.
• State Management and UI Logic: Apply appropriate state management patterns (Context API, Zustand, Redux or similar).
• Advanced React Performance: Work on application performance optimization, controlling re-renders and improving Core Web Vitals.
• UX/UI and Visual Quality: Ensure intuitive, well-crafted interfaces by applying UX/UI best practices.
• API Consumption and Integrations: Integrate the frontend with REST APIs, following best practices for error handling and resilience.
• Quality and Testing: Ensure code quality through unit and integration tests.
• Design System and Componentization: Contribute to the evolution of the design system and the component library.
• Code Review and Best Practices: Participate in code reviews promoting quality and accessibility standards.

Requirements

• Education: Bachelor’s degree in Computer Engineering, Computer Science or related fields.
• Postgraduate: Specialization in Web Development, Software Architecture or related areas (required for the Senior career track at Cresol).
• Proficiency with React and Next.js (15+): Solid experience with Hooks, Server and Client Components, rendering strategies (SSR, SSG, ISR) and performance-oriented frontend architecture.
• BFF with Next.js: Practical experience implementing BFF using native Next.js features, including Server Actions and Route Handlers.
• Advanced TypeScript: Mastery of static typing, generics, utility types and good modeling practices.
• Frontend Styling: Experience with CSS Modules, CSS-in-JS (Styled Components, Emotion or similar) and scalable CSS organization.
• Web Performance: Knowledge of optimizing React and Next.js applications, including bundle analysis, reducing re-renders and continuous improvement of performance metrics.
• Versioning and Collaboration: Advanced Git knowledge and collaborative workflows (Pull Requests, code review).
• Cloud and Deployment: Familiarity with deploying frontend applications and services on Azure (e.g., Static Web Apps).
• Agile Methodologies: Experience in teams using Scrum or Kanban.

Tech Stack

• Azure
• Cloud
• JavaScript
• Next.js
• React
• Redux
• TypeScript

Benefits

• Service Time Bonus – Recognition for your dedication and career with us.
• Postgraduate Assistance – We invest in your knowledge with a special incentive for your postgraduate studies.
• Educational Discounts – Exclusive partnerships with universities for Undergraduate, Postgraduate and MBA programs.
• Cresol Corporate University – Continuous learning to boost your career.
• Birthday Day Off – One day off in your birthday month to celebrate.
• Parent Bonus – Special incentive for the arrival of a child.
• Baby Kit – A welcome gift for new parents.
• Wedding Assistance – Financial support for celebrating new life chapters.
• Christmas Assistance – A gift to make the holiday meal more special.
• Health Insurance – Monthly premiums 100% covered by Cresol.
• Dental Plan – Monthly premiums 100% covered by Cresol.
• Physical Activity Incentive – Access to gyms, yoga, meditation and other practices.
• Workplace Gymnastics – Stretching and exercise sessions during the workday.
• Blood Donation Incentive – Financial benefit for blood donors.
• Cresol Cares – Free online therapy sessions for employees and dependents.
• Life Insurance – Additional protection with critical illness coverage.
• Cresol Longevity – Incentive to build financial reserves.
• Private Pension – Incentive to build financial reserves.
• Meal and/or Food Allowance – To make everyday life more convenient.
• Daycare Assistance – Support for childcare up to 7 years old.
• School Supplies Assistance – Support for children’s education up to 11 years old.
• Transportation Voucher – Facilitating commuting by public transport.
• Flexible Vacation – Option to split vacation into three periods.
• Pet Leave – 2 days off to enjoy a new family member.
• Extended Maternity Leave – Additional leave options beyond legal minimum.
• Extended Paternity Leave – More time to enjoy this special moment.
• Special Care Assistance – For employees who are parents of people with disabilities.
• Justified Absence – Parents of children with disabilities have justified absences for consultations or hospitalizations.