Senior Fullstack Developer

Description

**What are we looking for?** We are seeking a high-caliber professional to join Insi’s team — a technologist who views technology as a driver of transformation. As a Senior Fullstack Developer, you will be a key member of an elite squad focused on data and AI-powered automation. Your role extends beyond writing code: we expect strategic vision to architect scalable microservices, create seamless web and mobile experiences, and drive innovation through emerging technologies. If you possess analytical thinking, passion for tackling complex challenges, and aspire to lead the development of systems that leverage AI to optimize processes, this is your place. **Key Responsibilities:** * Own the full software development lifecycle — from architectural design to final delivery in mission-critical environments. * Develop and maintain robust, scalable microservices using .NET and JavaScript on the backend. * Build high-performance, responsive web interfaces using Angular, ensuring optimal user experience. * Lead hybrid mobile development with React Native and provide support for native requirements using Kotlin. * Implement and optimize Progressive Web Apps (PWA) to ensure accessibility and engagement across devices. * Collaborate closely with the data team to integrate AI and automation models into company products. * Ensure technical quality through code reviews, unit testing, and adherence to Clean Code principles and Design Patterns. * Integrate systems and manage API workflows, preferably using the Sensedia platform for governance and security. **Requirements:** * Proven experience as a Fullstack Developer in large-scale or highly complex projects. * Advanced expertise in .NET (C\#) and microservices architecture. * Deep professional experience with the Angular ecosystem for frontend development. * Proficiency in mobile development using React Native. * Practical knowledge of backend development using JavaScript (Node.js). * Solid experience developing and publishing PWAs (Progressive Web Apps). * Familiarity with Agile methodologies and version control tools (Git). * Autonomy in decision-making and a proactive mindset focused on solving complex problems. * Ability to mentor less-experienced developers and elevate the team’s technical level. **Nice-to-Haves:** * Practical knowledge of the Sensedia API management platform. Experience with native development in Kotlin. Hands-on experience with AI services (OpenAI API, LangChain, ML models). * Knowledge of cloud infrastructure (Azure or AWS) and CI/CD pipelines. * Specialization or certifications relevant to the .NET or Angular ecosystems. **Work Location: Remote** **Who is Insi?** We are a consultancy specialized in digital evolution. But above all, we are a people-first company. People who listen before proposing. Who get to the core before presenting a solution. Who measure success by what truly changed — not by what was implemented. With over three decades of history and global presence, we believe real transformation begins from within: within people, teams, and organizations — and this conviction guides every choice we make, every project we deliver, and every person we develop. **Why build your career at Insi?** Because here, you think, decide, and create together. We offer autonomy, clear goals, and an environment where Insiders have opportunities to engage with diverse technologies, participate in challenging projects, bring new ideas, and work from anywhere in Brazil — and why not? — around the world. We are recognized as one of the best companies to work for in Brazil by Great Place to Work, and among the top 10 employers in Brazil by TIME magazine. **What are our values?** * We are people serving people * We think and act like owners * We have a drive for performance * We grow and learn together * We pursue excellence and simplicity * We act with creativity and innovation All individuals are welcome, regardless of background, disability, ethnicity, religious belief, sexual orientation, appearance, age, or related factors. We want you to grow with us in an inclusive, opportunity-rich environment. If this resonates with you, then **\#JoinInsi!**