Backend Engineer (Java, PIX)

Responsibilities:

• Design, develop, test, and maintain scalable backend services using Java and Spring Boot to support PIX payment integrations and related payment flows in Brazil.

• Implement and optimize payment processing capabilities, including payment initiation, transaction status management, reconciliation, and exception handling.

• Integrate with Brazilian banks, payment service providers, and external financial systems through APIs and other integration mechanisms.

• Build reliable, high-performance backend systems with a strong focus on transaction consistency, idempotency, fault tolerance, and system availability.

• Troubleshoot production issues, identify root causes, and implement effective solutions to improve system stability and performance.

• Collaborate closely with product managers, QA engineers, DevOps, and other engineering teams to deliver payment features from development through production deployment.

• Write clean, maintainable, and well-tested code, participate in code reviews, and contribute to engineering best practices.

• Monitor system performance, identify bottlenecks, and continuously improve the reliability, scalability, and efficiency of payment services.

• Support payment-related security, risk control, and compliance requirements in collaboration with relevant stakeholders.

Requirements:

• Strong hands-on backend development experience with Java, preferably using Spring Boot and related frameworks.

• Solid understanding of RESTful APIs, microservices architecture, distributed systems, and database design.

• Experience working with relational databases and SQL; familiarity with caching, messaging systems, and asynchronous processing is a plus.

• Strong understanding of backend engineering fundamentals, including concurrency, transaction management, error handling, and performance optimization.

• Experience building and maintaining production systems, with the ability to independently investigate technical issues and deliver practical solutions.

• Familiarity with automated testing, CI/CD pipelines, Git, and production monitoring tools.

• Strong problem-solving skills, ownership, and a willingness to get hands-on with coding, debugging, and operational troubleshooting.

• Ability to work collaboratively in a fast-paced, cross-functional engineering environment.

Preferred Qualifications:

• Experience with PIX, Brazilian payment systems, or integrations with Brazilian banks and local payment service providers.

• Experience in payment processing, fintech, banking, digital wallets, or other transaction-intensive systems.

• Familiarity with payment reconciliation, webhook processing, transaction lifecycle management, and payment failure recovery.

• Experience with cloud infrastructure, containerization, Kubernetes, and observability tools.

• Understanding of payment security, fraud prevention, and financial regulatory requirements.

What We're Looking For

We are looking for a hands-on engineer who enjoys writing code, solving complex backend problems, and building reliable payment systems. The ideal candidate takes ownership from development to production, is comfortable debugging real-world issues, and can turn business requirements into robust technical solutions.

Experience with PIX is a strong advantage, but we also welcome strong Java backend engineers from payments, fintech, banking, and other transaction-intensive environments who can quickly learn the Brazilian payment ecosystem.