Senior/Principal Frontend Engineer

Google Chrome Microsoft Edge Apple Safari Mozilla Firefox Senior/Principal Frontend EngineerFull-timeCompany DescriptionJoin 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.We at Sigma Software value engineering excellence, collaboration, and continuous growth. 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.Why join us? You will have the opportunity to work with modern technologies, contribute to AI-powered product development, and grow in a supportive international environment with flexible work arrangements and professional development opportunities.CUSTOMEROur Customer is a global SaaS company building an AI-native revenue platform for modern finance and accounting teams. The company specializes in subscription management, billing, and revenue operations solutions that help businesses automate financial workflows and optimize recurring revenue processes. Their products support scalable financial operations while maintaining high standards of reliability, compliance, and performance.PROJECTThe project focuses on developing and enhancing modern web applications that support core payment processing systems and revenue operations workflows. The team works on scalable frontend solutions integrated with multiple payment gateways and backend APIs, ensuring smooth user experiences, high performance, and operational stability. The platform combines financial technology capabilities with AI-driven functionality to improve usability and automation for finance and accounting teams.Job DescriptionDevelop and maintain scalable, high-performance frontend applications using React and Next.jsCollaborate with Product, Design, and Backend teams to deliver seamless and user-friendly experiencesIntegrate APIs and backend services into frontend applicationsParticipate in architecture discussions, sprint planning, code reviews, and technical decision-makingEnsure responsive design, accessibility, and cross-browser compatibilityContribute to continuous improvement of engineering processes, frontend standards, and product qualityWork closely with backend engineers to ensure smooth end-to-end functionalitySupport performance optimization and frontend scalability initiativesQualifications5+ years of professional software engineering experience with strong focus on frontend developmentSolid commercial experience with ReactExperience with Next.js or similar modern frontend frameworksStrong proficiency in TypeScript and JavaScriptExperience integrating APIs into web applicationsUnderstanding of backend concepts and relational databases such as PostgresKnowledge of responsive design, accessibility, and cross-browser compatibility principlesStrong communication and collaboration skillsAbility to work independently in distributed teamsUpper-Intermediate English level or higherWILL BE A PLUSExperience with Vue or AngularKnowledge of Node.js or NestJSExperience with frontend performance optimization and build toolsExperience building AI-powered user experiencesExperience integrating AI/LLM services into frontend applicationsFamiliarity with OpenAI, Anthropic, AI SDKs, or prompt-based applications  Additional InformationPERSONAL PROFILEProduct-oriented mindsetProactive communication styleAttention to UI/UX qualityStrong ownership and accountabilityAbility to work in collaborative cross-functional teams  By clicking the link above or any third-party link within this posting, you are leaving this site and going to a third-party website where the third-party website's terms and privacy policy applyI'm interestedI'm interestedI'm interestedRefer a friendshare this jobShare to WeChat×Copy the...