Principal Backend Engineer
Core
Design and build scalable backend systems for a global financial operating system handling payments, cards, and spend management.
Role type
Senior Backend Engineer (Fintech)
Builds
Production backend services, APIs, and AI-integrated features for corporate financial platforms.
Domain
Fintech / Global Payments / Spend Management
Deliverable
production ML models | product features
Required skills
Go, Python, Node.js/TypeScript, RESTful APIs, GraphQL, gRPC, PostgreSQL, MongoDB, Redis, AWS/GCP/Azure, Docker, Kubernetes, CI/CD, LLM API integration, distributed tracing, security best practices
Preferred skills
Fintech domain knowledge, multi-currency systems, Kafka/RabbitMQ, global regulatory experience, bilingual Spanish and Portuguese
Technologies
Go, Python, Node.js, TypeScript, PostgreSQL, MongoDB, Redis, AWS, GCP, Azure, Docker, Kubernetes, Kafka, RabbitMQ, OpenAI, Anthropic, GitHub Copilot, Claude, Cursor
Responsibilities
Design and maintain scalable backend services for financial transactions; build and consume RESTful/GraphQL APIs; integrate LLM APIs for features like spend categorization; implement security and observability; collaborate across global regions.
Seniority
Senior, hands-on IC
