Senior Web UI Developer – React & Modern Frontend Consultant

Syffer is an all-inclusive consulting company focused on talent, tech and innovation. We exist to elevate companies and humans all around the world, making change, from the inside to the outside. We believe that technology + human kindness positively impacts every community around the world. Our approach is simple, we see a world without borders, and believe in equal opportunities. We are guided by our core principles of spreading positivity, good energy and promote equality and care for others. Our hiring process is unique! People are selected by their value, education, talent and personality. We dont present ethnicity, religion, national origin, age, gender, sexual orientation or identity. Its time to burst the bubble, and we will do it together! What You'll do: - You will take ownership of building and evolving user-facing web applications using a modern JavaScript stack. This includes developing modular, reusable UI components and ensuring high visual accuracy in line with design specifications; - You will focus on performance optimization, scalability, and maintainability, making use of modern tooling to deliver fast and responsive user experiences; - You will work hand-in-hand with UX/UI designers, backend engineers, and product stakeholders to convert functional needs into robust technical solutions; - As part of the engineering team, you will contribute to peer reviews, help resolve production issues, and support end users when needed; - Depending on project needs, you may also contribute to server-side development, helping ensure smooth interaction between client-side and backend services; - You are expected to continuously monitor advancements in frontend technologies and engineering practices; - You will actively contribute ideas to improve application usability, technical quality, and long-term sustainability.  Who You Are: - Academic background in computer science, software engineering, or a related technical field; - Strong hands-on experience building frontend applications with React and TypeScript, along with modern styling approaches; - In-depth knowledge of core JavaScript concepts (ES6+) and browser behavior ; - Practical experience with modern build systems and tooling used in frontend development; - Solid understanding of API-based integrations and frontend–backend communication; - Daily use of source control platforms such as Git-based repositories; - Ability to produce clean, readable, and well-structured code; - Fluency in Portuguese and English is required; additional languages are an advantage; - Team-oriented, proactive, and motivated to improve both products and processes; Nice to Have - Exposure to backend development using Java-based frameworks; - Knowledge of additional frontend frameworks; - Familiarity with automated delivery pipelines; - Strong testing mindset with experience in frontend testing tools and frameworks; - Experience using component libraries or design systems; - Understanding of Agile delivery frameworks and related tooling; - Awareness of web accessibility standards and inclusive design principles;  What youll get: - Wage according to candidate's professional experience; - Remote Work whenever possible; - Delivery of work equipment adjusted to the performance of functions; - Benefits plan; - And others. Work together with expert teams on projects of large magnitude and intensity, long term together with our clients, all leaders in their industries. Are you ready to step into a diverse and inclusive world with us? Together we will promote uniquess!