[Job - 29052] Senior Developer FullStack (TypeScript/Next.js/React - Kotlin/Spring Boot),Brazil at CI&T

We are tech transformation specialists, uniting human expertise with AI to create scalable tech solutions. With over 8,000 CI&Ters around the world, we’ve built partnerships with more than 1,000 clients during our 30 years of history. Artificial Intelligence is our reality. We’re looking for a Senior Fullstack Developer with strong experience in React and Java (Spring Boot), and familiarity with Next.js, Kotlin, and GraphQL. You’ll design, build, and support enterprise-scale web applications and microservices that are performant, secure, and user‑centric. Responsabilities: Design, develop, unit test, and integrate fullstack application components. Build scalable web apps using React on the frontend and Kotlin/Spring Boot on the backend. Implement RESTful APIs, microservices, and integrations with enterprise systems. Collaborate with UX/UI, product, architecture, and QA teams in an Agile environment. Create and maintain architecture, design, and system documentation. Requirements: Solid experience with fullstack development. Strong hands‑on with React and TypeScript. Strong backend experience with Spring Boot. Experience with microservices and enterprise integration patterns. Excellent problem-solving, debugging, and communication skills. Nice to have: Experience with Kotlin-based Spring Boot services. Experience developing and maintaining GraphQL APIs. Optimizing Next.js-based frontends and leveraging its main features. In-depth experience with using Cloud resources, ideally on Azure. Production support experience (Datadog, APM, hotfixes). Why join us: Work on high‑impact, customer‑facing products for leading global brands. Collaborate with talented teams across strategy, design, data, and engineering. Be part of a digital‑first culture focused on innovation, quality, and continuous improvement. Our benefits: -Health and dental insurance -Meal and food allowance -Childcare assistance -Extended paternity leave -Partnership with gyms and health and wellness professionals via Wellhub (Gympass) TotalPass; -Profit Sharing and Results Participation (PLR); -Life insurance -Continuous learning platform (CI&T University); -Discount club -Free online platform dedicated to physical, mental, and overall well-being -Pregnancy and responsible parenting course -Partnerships with online learning platforms -Language learning platform And many more! More details about our benefits here: [Upgrade to PRO to see link] At CI&T, inclusion starts at the first contact. If you are a person with a disability, it is important to present your assessment during the selection process. See which data needs to be included in the report by clicking here.This way, we can ensure the support and accommodations that you deserve. If you do not yet have the assessment, don't worry: we can support you in obtaining it. We have a dedicated Health and Well-being team, inclusion specialists, and affinity groups who will be with you at every stage. Count on us to make this journey side by side.