Senior Backend Engineer – API & Payments (AI-Native) Position

Description

Job Summary: We are seeking a Senior Backend Engineer specialized in APIs and AI-Native technologies to co-create a better future, valuing innovation and continuous learning. Key Highlights: 1. Join a global team that values innovation, respect, and commitment. 2. An opportunity for disruptive individuals passionate about continuous learning. 3. Be part of a team co-creating a better future. Join Stefanini! At Stefanini, we are over 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** **Essential 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, at Stefanini we transform 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 are what you are looking for. Come and let’s build a better future together!