[Job-29731] Senior Java/Kotlin Backend Developer, Brazil

Description

At CI\&T, we help major enterprises transform the potential of AI into real business impact through AI Deployment, AI-native execution, and tech-integrated business solutions. With 30 years of experience in technological transformation, we accelerate innovation with expertise in agentic SDLC, application modernization, Data \& AI, martech, and business strategy. We are 8\.000 CI\&Ters across more than 25 countries, collaborating to build solutions with tangible impact. AI is already part of how we work, evolve, and innovate every day. **Important**: If you reside in the Metropolitan Region of Campinas, your physical presence at the city's offices is mandatory, per the current attendance policy. CI\&T, in partnership with one of Brazil's largest digital banks, is seeking a **Senior Backend Developer**. We believe diversity of experiences and perspectives is essential to creating innovative solutions. If you are passionate about technology, high-quality software development, and want to be part of a project that impacts millions of people, this is your opportunity to shine. **Your Mission:** You will be involved in the entire product lifecycle—from conceiving new features through to deployment, maintenance, and continuous improvement. You will be a key contributor to developing services and APIs powering one of the country's most dynamic financial ecosystems. **Responsibilities:** * **Development and Architecture:** Design and develop robust, scalable microservices using Kotlin and Java. * **Quality and Best Practices:** Ensure code excellence by applying principles such as TDD, DDD, Clean Code, and Hexagonal Architecture. * **Collaboration:** Partner closely with team members and clients, communicating clearly and proactively to deliver optimal solutions. * **Full Lifecycle Ownership:** Write tests (unit, functional, performance), instrument applications for monitoring (Grafana/Splunk), and resolve complex technical issues (bugs, incidents). * **Technology and Innovation:** Work within a modern technology ecosystem, including SQL and NoSQL databases (PostgreSQL), and protocols such as HTTP/HTTPS. * **Code Management:** Use GIT/Git Flow and document APIs with Swagger to maintain project organization and clarity. **Requirements:** * Solid experience with object-oriented programming languages, especially Java and Kotlin. * Proven knowledge of microservice architecture. * Proficiency in software development best practices (TDD, DDD, Clean Code). * Experience with relational and non-relational databases (SQL/NoSQL). * Familiarity with the HTTP/HTTPS protocol and tools such as GIT and Swagger. * Ability to solve complex technical problems and propose continuous improvements. * Excellent communication skills and a collaborative mindset. **Nice-to-have:** * Frameworks such as Spring Boot and/or Javalin. * Docker and Kubernetes for container orchestration. * Data streaming solutions (e.g., Kafka) and event-driven architecture. * Cloud platforms, especially Google Cloud and AWS. * API Management tools such as Apigee Hybrid. * Node.js for API management and server-side development. \#LI\-DJ1 \#LI\-midsenior **Our Benefits:** * Health and dental insurance; * Meal and food allowance; * Childcare assistance; * Extended parental leave; * Partnerships with gyms and health/wellness professionals via Wellhub (Gympass, TotalPass); * Profit and Results Sharing Program (PLR); * Life insurance; * Continuous learning platform (CI\&T University); * Discount club; * Free online platform dedicated to promoting physical and mental health and overall well-being; * Pregnancy and responsible parenting courses; * Partnerships with online course platforms; * Language learning platform; * And many more More details about our benefits here: https://ciandt.com/br/pt\-br/carreiras At CI\&T, inclusion begins at first contact. If you are a person with disability, it is important to **submit your medical report during the selection process.** *Check which information must be included in the report* *by clicking here.* This way, we can ensure the support and accommodations you deserve. **If you do not yet have the official characterization report, 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 accompany you throughout every stage. Count on us to walk this journey alongside you.