Job Summary: We are seeking a Senior Backend Developer to design and implement scalable services, evolve microservices architectures, and maintain RESTful APIs, with a focus on security and quality. Key Highlights: 1. Experience with Microservices and SOA architectures 2. Development of RESTful APIs and complex integrations 3. Focus on software engineering and observability Join a company that loves transforming through technology and embraces diversity in all its forms! **Responsibilities and Duties** Design and implement decoupled, scalable, and resilient backend services Define and evolve architectures based on Microservices and SOA Develop and maintain RESTful APIs following best practices for design and versioning Implement synchronous and asynchronous integrations, including messaging and streaming Model and optimize relational and NoSQL databases Implement caching strategies, concurrency control, and fault tolerance Apply API security best practices (OAuth2, JWT, OpenID Connect) Develop and maintain automated tests (unit, integration, and contract) Conduct code reviews focused on quality, performance, and maintainability Work on system observability (logs, metrics, and distributed tracing) **Requirements and Qualifications** **Mandatory:** Solid experience as a senior-level backend developer Strong knowledge of Microservices, SOA, and API design Proficiency in data modeling and advanced SQL Experience with relational and/or NoSQL databases Hands-on experience with asynchronous messaging Knowledge of Git and version control best practices Application of software engineering principles (SOLID, Clean Architecture, DDD) Bachelor’s degree in progress or completed in IT-related fields **Technology Stack (reference):** Languages: Java, Kotlin, C#, Node.js, Python, or Go Frameworks: Spring Boot, .NET, NestJS, FastAPI, Quarkus Protocols: REST, gRPC Databases: PostgreSQL, MySQL, MongoDB, Redis Infrastructure: Docker, Kubernetes, Cloud Providers **Additional Information** **Desirable:** Experience with Docker and Kubernetes Experience with CI/CD Cloud experience (AWS, Azure, or GCP) Knowledge of event-driven architecture Experience with highly available distributed systems Knowledge of performance tuning and load testing Want to learn more about us and join the team building the future? **\#VemSerSpreader** **Transforming the world with technology** We are nearly 2,500 Spreaders, spread across 22 Brazilian states through Spread Anywhere, enabling us to work **100% remotely**, depending on the contract model. We are digital, hyperconnected, and wherever we are, we practice daily one of the core values deeply embedded in our culture: \#collaboration. **Innovation to develop the future** Spread is an innovation company with 41 years of history, offering comprehensive solutions in technology and digital business. Currently, we have a robust portfolio of services, including application development, Quality Assurance, IT Outsourcing, Talent on Demand, as well as AI-based solution development and SAP and S/4HANA consulting and implementation. We adopt a customer-centric approach, where customer experience is our top priority and guides our actions and strategies. This commitment is reflected in our NPS score of 75 points — placing us in the quality zone and demonstrating our customers’ trust and satisfaction. **Diversity, Equity & Inclusion** Here, diversity and inclusion are not just words but genuine commitments. We strive to ensure all Spreaders feel **valued, respected, and empowered** to reach their full potential. We recognize that true diversity goes beyond superficial traits and encompasses a broad range of characteristics, such as gender, ethnicity, sexual orientation, age, and abilities.