Senior Backend Developer (Node.js / Python)Portugal | Remote (Residents in Portugal)We are strengthening our team with aSenior Backend Developerto join international projects focused on building scalable APIs, microservices, and cloud-native architectures. If you have strong experience in backend development and modern distributed systems, this could be your next challenge.Key Responsibilities Design, develop, and maintain scalable REST and GraphQL APIs; Define and implement microservices architectures; Design and optimize relational and NoSQL databases; Integrate third-party services and external APIs; Participate in code reviews and contribute to architectural decisions; Ensure application security standards (OWASP, OAuth2/OIDC); Analyze and optimize system performance; Collaborate with frontend teams and Product Owners; Produce technical documentation and follow best practices.Technical Requirements Strong experience with T ypeScript and Node.js (primary stack); Experience withPython: Deep understanding of API-driven design (API-first, versioning, OpenAPI/Swagger); Experience with ORM frameworks (Prisma, SQLAlchemy); Experience with message brokers (Kafka, RabbitMQ, or NATS); Experience with serverless architectures (AWS Lambda and/or Azure Functions); Hands-on experience with Docker and Kubernetes; Experience with CI/CD pipelines (GitLab CI, GitHub Actions, Jenkins); Experience with at least one cloud provider (AWS, Azure, or GCP); Strong knowledge of relational and NoSQL databases (PostgreSQL, MongoDB, Redis, etc.); Experience working in Agile environments; English (B2+) required| German is a plus.Nice to Have Experience with Event-Driven Architecture and CQRS/Event Sourcing; Knowledge of API Gateway solutions (Kong, AWS API Gateway); Experience with SAP Commerce Cloud (Hybris); Certifications (AWS Certified Developer, CKAD, or similar); Knowledge of observability tools (Prometheus, Grafana, OpenTelemetry).Project Context Integration in international teams; Remote work model; Agile environment with focus on delivery, quality, and continuous improvement.Interested?Feel free to send me a private message or share your CV: