Job Summary: Stefanini is seeking a Senior Backend Engineer focused on APIs and AI-Native development to join an innovative global team and co-create a better future. Key Highlights: 1. Be part of a global team of over 30,000 geniuses across 41 countries. 2. Opportunity to innovate and make a difference in a team that values your ideas. 3. Continuous growth and innovation embedded in the company’s DNA. Join Stefanini! At Stefanini, we are more than 30,000 geniuses connected from 41 countries, co-creating a better future. Become our **Senior Backend Engineer – API & AI-Native**! **Responsibilities and Duties** **Experience** * +6 years of experience. **Requirements and Qualifications** **Mandatory Skills** * 7+ years in backend/API engineering; * Proven domain experience in Payments or Cash Management. * Strong expertise with Java (Spring Boot) and Python (FastAPI). * Hands-on experience with Kafka, schema registries, PostgreSQL, Redis. * Deep understanding of OAuth 2.1, OIDC, mTLS, and enterprise secret management. * Experience with Kubernetes (AKS), service mesh, Terraform, GitOps (ArgoCD). * Familiarity with Datadog AI/Dynatrace and AI-assisted observability. * Experience with regulatory frameworks: PSD2, GDPR, DORA. * Proficiency in English and Spanish (tested). **Desirable Skills:** * Preferred Qualifications. * Experience with vector DBs, RAG, LangChain or equivalent. * Familiarity with Confluent Platform and schema evolution best practices. * Experience in LLMOps, prompt engineering, and enterprise AI governance. **Additional Information** Are you looking for a place where your ideas shine? With over 38 years of experience and a global presence, Stefanini transforms tomorrow—together. Here, every action matters and every idea can make a difference. Join a team that values innovation, respect, and commitment. If you are a disruptive individual, committed to continuous learning, and innovation is in your DNA, then we’re exactly what you’re looking for. Come and let’s build a better future—together!