Mid-Level Back-End Developer (Node.js)

Description

**We are looking for someone who dares to take the lead with us.** We are looking for a Mid-Level Back-End Developer to work in the Financial Segment ecosystem, an environment with high transaction volume and complex integrations with banking and financial partners. You will be part of a team that develops and evolves secure, scalable, and high-impact digital payment solutions. **Responsibilities and attributes:** * Develop and maintain Node.js/NestJS microservices focused on digital payments, onboarding, and credit; * Integrate with banking systems, acquirers, and gateways (Pismo, Sinquia, BTG, etc.); * Implement and optimize REST and GraphQL APIs; * Ensure engineering best practices: testing, versioning, CI/CD, and monitoring; * Contribute to code quality and the technical evolution of the team (code review, pair programming); * Collaborate with product, QA, and front\-end areas to deliver robust and well-integrated solutions **Requirements and qualifications:** * Solid experience with Node.js and TypeScript; * Knowledge of modern frameworks such as NestJS or Express; * Experience with relational databases (PostgreSQL); * Experience with REST/GraphQL APIs and versioning best practices; * Knowledge of AWS (ECS, RDS, CloudWatch, S3, Secrets Manager); * Familiarity with CI/CD and containers (Docker, Bitbucket Pipelines); * Technical English. **Desirable**: * Experience in fintechs or payment institutions; * Knowledge of API security (JWT, mTLS, rate\-limiting, PCI DSS); * Experience with tracing and observability (CloudWatch, Sentry, Datadog). **Additional information:** * For your health, we offer **medical and dental assistance** without copayment for exams and consultations. * Want more well-being? We offer **Gympass** and **Zenklub** (with two free sessions per month) for you to take care of your physical and mental health. * When you get hungry, use our food benefit **Caju** to make purchases at any supermarket or restaurant. * Love to travel? Here we have **Férias \& Co**, a benefit that helps you make that dream trip happen. * Have children? Count on our **childcare assistance**. * Family growing? We have **MomCare**, a flexible monetary incentive after maternity leave for new Datunian mothers. * To make your work environment your own, count on our **home office assistance**. * Want to invest in your professional development? We have partnerships with several renowned educational institutions to offer you discounts that can reach 70% on **undergraduate**, **postgraduate**, **MBA**, **language** courses and much more! **To learn about all our benefits, access the** **home of our careers page.**