[Hiring] Senior/Principal Frontend Engineer @Sigma Software

Role Description

Join an innovative project at the intersection of FinTech and AI technologies. We are looking for a Senior/Principal Frontend Engineer to help build scalable, high-performance web applications for modern finance and accounting teams. This is a full-time remote position based in Brazil.

In this role, you will work closely with Product, Design, and Backend teams to create intuitive user experiences and deliver impactful solutions for a global SaaS platform.

Key responsibilities include:

• Develop and maintain scalable, high-performance frontend applications using React and Next.js
• Collaborate with Product, Design, and Backend teams to deliver seamless and user-friendly experiences
• Integrate APIs and backend services into frontend applications
• Participate in architecture discussions, sprint planning, code reviews, and technical decision-making
• Ensure responsive design, accessibility, and cross-browser compatibility
• Contribute to continuous improvement of engineering processes, frontend standards, and product quality
• Work closely with backend engineers to ensure smooth end-to-end functionality
• Support performance optimization and frontend scalability initiatives

Qualifications

• 5+ years of professional software engineering experience with strong focus on frontend development
• Solid commercial experience with React
• Experience with Next.js or similar modern frontend frameworks
• Strong proficiency in TypeScript and JavaScript
• Experience integrating APIs into web applications
• Understanding of backend concepts and relational databases such as Postgres
• Knowledge of responsive design, accessibility, and cross-browser compatibility principles
• Strong communication and collaboration skills
• Ability to work independently in distributed teams
• Upper-Intermediate English level or higher

Requirements

• Experience with Vue or Angular will be a plus
• Knowledge of Node.js or NestJS will be a plus
• Experience with frontend performance optimization and build tools will be a plus
• Experience building AI-powered user experiences will be a plus
• Experience integrating AI/LLM services into frontend applications will be a plus
• Familiarity with OpenAI, Anthropic, AI SDKs, or prompt-based applications will be a plus

Personal Profile

• Product-oriented mindset
• Proactive communication style
• Attention to UI/UX quality
• Strong ownership and accountability
• Ability to work in collaborative cross-functional teams