Job Summary: A .NET Core back-end development professional to plan, build, and evolve APIs and microservices, integrate data, and operate within an OpenShift environment while adhering to sound software engineering practices. Key Highlights: 1. Plan and develop back-end services with .NET/.NET Core 2. Design and evolve high-performance and secure APIs and microservices 3. Collaborate in a dynamic and innovative environment with continuous training Leega is a company focused on delivering efficient and innovative service to its clients. This commitment extends to our most vital asset: our people! Our culture is inspiring, and our values are reflected daily: ethics and transparency, quality excellence, teamwork, economic, social and environmental responsibility, human relationships, and credibility. We seek innovative professionals who thrive on challenges and focus on results. If you’re looking for a dynamic, collaborative company that invests in its employees through continuous training, Leega is the place for you! **\>\> LEEGA IS FOR EVERYONE****, we’d be thrilled to welcome you to our team. Join us in shaping our story and building our future.** Apply now to our open positions! **Responsibilities and Duties** * Plan, develop, and maintain back-end services and applications using .NET / .NET Core. * Design and evolve APIs and microservices with emphasis on performance, security, and scalability. * Integrate and manipulate data in Oracle and SQL Server databases, ensuring operational efficiency. * Work within an OpenShift environment, including application deployment, troubleshooting, and service lifecycle monitoring. * Implement best practices in architecture, design patterns, and code quality (SOLID, Clean Code, unit testing). * Participate in technical reviews, code reviews, and architectural discussions. * Collaborate with product, architecture, and QA teams to ensure continuous, high-quality delivery. **Requirements and Qualifications** * Solid experience with .NET Core focused on back-end development. * Proficiency in REST APIs, distributed services, and microservice architecture. * Strong knowledge of Oracle and/or SQL Server (queries, stored procedures, tuning). * Practical experience with OpenShift (containers, deployments, builds, monitoring). * Git and structured version control. * Best practices in software engineering (SOLID, Clean Code, unit testing). **Nice-to-Have (not mandatory)** * Experience with messaging systems (RabbitMQ, Kafka, MQ Series). * Hands-on experience with CI/CD tools (Jenkins, GitLab CI, Azure DevOps). * Knowledge of observability (logs, metrics, tracing). * Experience in the banking or financial sector. **Additional Information** * **Work Model: Hybrid — 3 days per week onsite in São Paulo, near Oscar Freire Station (Yellow Line) and Trianon Masp Station (Green Line) of the metro.** At Leega, we don’t just deliver lines of code or dashboards. We transform complex technological challenges into real impact. With over 15 years of experience, we combine deep human expertise with the speed of Artificial Intelligence to build solutions that transform businesses—and, above all, improve people’s lives. We are a technology consultancy—agnostic and strategic—with offices in Brazil and Europe. Our team of over 580 multidisciplinary talents lives and breathes the Data Analytics, Cloud, and AI ecosystem. We master the full foundation—from Governance to Engineering—to ensure technology is not merely a tool, but a sustainable competitive advantage for the market’s top players.