Senior Backend Engineer - Fintech Payments & Scale

silver; Argentina; Presencial; ARS 4.000.000 - 6.800.000; Jornada completa

Descripción de la vacante

Silver, a BNPL platform, is seeking a Senior Backend Engineer who owns systems, not just services. You’ll design the backend that moves money for millions of users — correctness, resilience, and performance are essential.

You’ll work with Product and other engineering teams, write code, make architectural calls, and be on the hook for production behavior. You will mentor others and help the team scale as we grow.

Formación

• Bachelor's degree in Computer Science or a related field, or equivalent practical experience.
• 5+ years of backend development experience, with solid depth in Node.js and NestJS (Express).
• Proven experience designing and operating RESTful APIs in production.
• Advanced knowledge of relational databases, preferably PostgreSQL.
• Experience writing unit and integration tests, and treating quality as part of delivery.
• Strong grasp of design principles and architectural patterns.
• Track record of shipping features independently and owning service performance in a fast-moving context.
• Ability to communicate complex technical concepts clearly, and to mentor others effectively.
• Excellent problem-solving and analytical thinking, with genuine curiosity about new technology.

Responsabilidades

• Design and build robust, scalable backend services in Node.js and NestJS (Express).
• Create and maintain high-performance RESTful APIs that other teams can build on with confidence.
• Build for financial correctness — idempotency, reconciliation, retries, and well-defined failure states.
• Model and manage relational data, primarily in PostgreSQL, with performance and integrity in mind.
• Make architectural and system-design decisions, and own the trade-offs behind them.
• Ensure optimal service performance and own production deployments end-to-end.
• Raise the engineering bar through code reviews, pairing, and clear technical standards.
• Mentor engineers and lead technical discussions, leaving the team stronger than you found it.
• Move fast across multiple workstreams in a dynamic, high-growth startup environment.

Conocimientos

Node.js

NestJS

Express

RESTful APIs

PostgreSQL

Unit tests

System design

Mentoring

Production ownership

Communication

Educación

Bachelor's degree in Computer Science or related field

Herramientas

Docker

Kubernetes

RabbitMQ

Kafka

Descripción del empleo

Silver, a BNPL platform, is seeking a Senior Backend Engineer who owns systems, not just services. You’ll design the backend that moves money for millions of users — correctness, resilience, and performance are essential.

You’ll work with Product and other engineering teams, write code, make architectural calls, and be on the hook for production behavior. You will mentor others and help the team scale as we grow.