Job Summary: Backend Developer to build resilient systems, design scalable solutions, and ensure digital operations—focusing on high-level architecture and cross-functional collaboration. Key Highlights: 1. Build resilient and scalable systems in Kotlin and Spring Boot 2. Work with event-driven architectures and messaging 3. Culture of quality, testing, and collaboration with Product and Frontend Do you want to build resilient systems that power the core of a digital operation? As a Backend Developer here, you don’t just write code—you design scalable solutions, work with event-driven architectures, and ensure our engine never stops. **Responsibilities and Duties** **What You’ll Do:** * **High-Level Architecture:** Evolve and maintain robust services using **Kotlin** and **Spring Boot**. * **Distributed Systems:** Master asynchronous flows and messaging, building loosely coupled, fault-tolerant systems. * **Data Strategy:** Model data in relational and NoSQL environments, always prioritizing performance and integrity. * **Quality Culture:** Actively participate in Code Reviews, promote best practices, and document technical decisions that shape the product’s future. * **Real Collaboration:** Work side-by-side with Product and Frontend teams to transform complex requirements into elegant APIs. **Requirements and Qualifications** **What We’re Looking For (Requirements)** * **Stack Proficiency:** Solid experience with **Kotlin** and **Spring Boot** (Spring Data, Security, WebFlux are strong pluses). * **Relational Thinking and Beyond:** Proficiency in SQL databases (PostgreSQL/MySQL) and familiarity with NoSQL (MongoDB, Cassandra, or Redis). * **Event Architecture:** Hands-on experience with messaging and data streaming (Kafka, RabbitMQ, or AWS SQS/SNS). * **Testing Culture:** Mindset aligned with **Test-Driven Development (TDD)**, ensuring coverage via unit, integration, and contract tests. * **Clean Code & Patterns:** Deep knowledge of Design Patterns, SOLID principles, and Clean Architecture. * **API Design:** Ability to build intuitive, well-versioned, and documented RESTful APIs (Swagger/OpenAPI). **What Impresses Us (Nice-to-Haves)** * **Coroutines:** Experience with asynchronous programming using **Kotlin Coroutines** for high performance. * **Cloud Native:** Familiarity with cloud ecosystems (AWS, GCP, or Azure) and containerization tools (**Docker and Kubernetes**). * **Observability:** Experience with monitoring and tracing tools (Prometheus, Grafana, ELK, or New Relic). * **DevOps Mindset:** Knowledge of CI/CD pipelines and deployment automation. * **Community Engagement:** Contributions to Open Source projects, technical writing, or speaking at industry events. **Why Join Our Team?** * **Autonomy:** Active participation in Agile ceremonies and solution design. * **Quality First:** Dedicated time for testing, documentation, and refactoring. * **Collaborative Environment:** Multidisciplinary squads where your technical opinion carries weight. **Additional Information** Conditions * Employment Model: Service Provision Contract (PJ) * Fixed Fee: R$ 6,000.00 to R$ 8,000.00 * Remote Work * Career Development Plan with Performance Review Cycles * Life Insurance * Cafeteria Want to level up your career and join a fintech that’s **transforming how people move and care for their vehicles**? Then you need to get to know **Finx**! Here, we breathe innovation and believe success is built together—with **autonomy, grit, and a drive to make things happen**. If you love challenges, learn every day, and want to truly make a difference, this is your place. At Finx, you’ll work on **vehicle subscriptions, insurance, and vehicle-backed loans**, delivering simple, modern solutions that help our customers achieve their goals—practically and transparently.