Job Summary: Opportunity for analytical and investigative professionals who enjoy solving complex problems in microservices, working cross-service to ensure stability, reliability, and continuous evolution of Dotz’s systems. Key Highlights: 1. Work on critical and legacy microservices, investigating real failures 2. Develop and evolve solutions that directly impact customer experience 3. Analytical, investigative work with a high degree of responsibility **Here’s what you’ll find at Dotz** Big Dreams People who deliver results We value our People Owner’s hunger We embrace the journey with passion This opportunity is for those who like to dig deep. You’ll operate at the core of Dotz’s systems, taking ownership of critical microservices—many of them legacy—built by different teams over time. The challenge lies in understanding code you didn’t write, investigating real failures, stabilizing services, and evolving solutions that directly impact end-customer experience. It’s analytical, investigative work with high responsibility, carried out cross-service to ensure stability, reliability, and continuous evolution. If you’re motivated by solving complex problems and delivering concrete impact, click to learn more about this role. **Responsibilities and Duties** * Design, maintain, and evolve back-end solutions based on microservices, with focus on scalability, performance, and reliability; * Assume ownership of Core services, performing fixes, refactorings, and stabilization; * Investigate complex production failures; * Develop and maintain robust, well-documented RESTful APIs; * Perform troubleshooting and handle production incidents, actively participating in deployments and root-cause analyses; * Participate in architecture discussions, both for new projects and for evolving existing systems; * Contribute to code quality through: * code reviews; * definition of standards; * unit and automated testing; * technical documentation; * Work in a DevOps model, overseeing the full software lifecycle—from code to production; * Collaborate closely with other teams and services across the Dotz ecosystem; * Share technical knowledge and best practices with the team. * Be highly analytical, resilient, and investigative; * Work with legacy code; * Navigate complex, poorly documented systems; * Enjoy uncovering the root cause of real business problems; * Take responsibility for critical systems; * Operate in environments where failure directly impacts the end customer. **Requirements and Qualifications** * Back-end — At least 5 years of software development experience; * Advanced proficiency in C# (.NET Core — Full Framework is a plus); * Advanced proficiency in Python, including: SQLAlchemy (ORM), Alembic (migrations), FastAPI (desirable); * Databases — Relational: SQL Server, PostgreSQL, MySQL; Non-relational: MongoDB, Redis; Languages: T-SQL, PL/SQL or PL/pgSQL; * Microservices architecture, Cloud, and DevOps; * RESTful APIs; * Messaging, asynchronous processing, logging, transactions, load balancing, Docker, Kubernetes; * Cloud: AWS or GCP; * CI/CD (GitHub Actions, Jenkins, Azure DevOps or similar); * Infrastructure provisioning via Terraform; * APM and observability (ELK, New Relic or similar); * Knowledge of best practices such as: SOLID, Clean Code, TDD, DevOps culture, Automation. * Differentiators: * Front-end knowledge (Angular, React or React-Native) to understand integrations; * Experience with high-criticality, high-volume digital products; * Experience in SuperApp, fintech, or distributed ecosystems. **Additional Information** * PJ — Remote work model * Flexible benefits card: Flash * Annual variable compensation (PLR) * Birthday day off * Dotz birthday benefit * Dotz birthday benefit based on tenure, starting from the first year * TotalPass * Partnership with Open English * Partnership with **C4life:** Access specialized guidance across multiple areas: Psychological, Legal, Financial, Social, and Pets * Numerous additional initiatives and many Dotz benefits within our **Ganha Mais Program**, designed to provide top-tier benefits for Dotzeiros. Caring for **\#NossaGente** is one of our main purposes—so we continuously strive to offer the best, enabling us to enjoy the journey with passion. * **\#JoinDotz!** We are a company founded in 2000 to increase Brazilians’ purchasing power. We do this by delivering access to benefits for people across Brazil. Over the past 20 years, we’ve reached over 50 million people nationwide who feel empowered to achieve more. A company with a story to tell. We became known for our work in loyalty programs, connecting consumers to our partners through rewards. We have multiple partnerships across diverse sectors: major retail chains, e-commerce platforms, leading banks, and the country’s largest mobile telecommunications company. Today, Dotz is much more than that. Through our Super App, we deliver benefits directly to consumers. The Dotz app includes a digital account and other financial services. Users who pay with Dotz receive benefits on every purchase they make. Moreover, they enjoy the freedom to choose their preferred benefit type: products, services, discounts, or even cashback into their account. Using Dotz transforms routine payments into access to advantages. The more you use it, the more you earn. Living with Dotz means earning while living. A multifaceted system integrated into a single app to democratize access to benefits. With Dotz, you can do more. **How cool is that!** We were recently recognized by our customers in major national awards in the loyalty program category: we won 1st place in the Reclame Aqui Award 2020 and were named “the most enchanting company for customers” in the Modern Consumer Survey. **\#JoinDotz** **We’re building an increasingly plural and diverse Dotz for everyone!** We’re implementing actions to foster an innovative, ethical, inclusive, safe workplace—one that **respects people and their individualities**. Dotz understands that plurality drives **\#NossaGente**, which is why we actively promote an inclusive culture. We make no distinction based on race, color, religion, gender identity, sexual orientation, nationality, disability, or age at any stage of the selection process—reinforcing our commitment to diversity.