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.
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.
CUSTOMER
Our 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.
PROJECT
The 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 Description- 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
- 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
WILL BE A PLUS
- Experience with Vue or Angular
- Knowledge of Node.js or NestJS
- Experience with frontend performance optimization and build tools
- Experience building AI-powered user experiences
- Experience integrating AI/LLM services into frontend applications
- Familiarity with OpenAI, Anthropic, AI SDKs, or prompt-based applications
Additional Information
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
Skills Required
- 5+ years of professional software engineering experience with strong focus on frontend development
- 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
- Experience with Vue or Angular
- Knowledge of Node.js or NestJS
- Experience with frontend performance optimization and build tools
- Experience building AI-powered user experiences
- Experience integrating AI/LLM services into frontend applications
- Familiarity with OpenAI, Anthropic, AI SDKs, or prompt-based applications
What We Do
Sigma Software Group, an award-winning and trusted IT partner, has been serving customers for over 21 years, providing comprehensive IT solutions to various businesses, ranging from startups to established software product houses. As one of Europe's substantial IT consultancies, it brings together a dedicated workforce of over 2,100 professionals in 40 offices across 19 countries. With a diverse client base, including more than 300 enterprises, including Fortune 500 stalwarts, Sigma Software Group is a preferred choice for developing solutions that help businesses create cutting-edge products while meeting their unique needs. Sigma Software Group operates as a dynamic ecosystem of tech companies, offering 25 ready-to-implement innovative products and 40+ value-added services. Furthermore, Sigma Software Group is committed to fostering innovation through initiatives such as the Sigma Software Labs business incubator, Sigma Software University, the SID Venture Partners VC Fund, UA Tech Network, Techosystem, the European Business Association, and other collaborative efforts. Since 2015, Sigma Software Group has consistently earned recognition on the IAOP's prestigious World's Top 100 Outsourcing list. The company's accomplishments have also been acknowledged by prominent global media outlets such as Forbes, CNBC, The Times, and Reuters
