Senior Java Developer – Switch, Transactional Acquirer Authorizer

This is a fully remote position, open to applicants in Brazil.

📋 Description

• Operate within a fast-paced, high-stakes, and high-volume transaction environment

• Enhance the performance, security, and scalability of our solutions

• Engage in projects that influence thousands of transactions on a daily basis

⛳️ Requirements

• Demonstrated expertise in Backend / Core Java (JDK 21+)

• Experience in developing high-performance, low-latency applications

• Proficient in concurrent programming (multithreading, parallelism)

• Knowledgeable in distributed and scalable systems

• Familiarity with concurrency control, idempotency, and parallel processing

• Skilled in building resilient, fault-tolerant systems

• Experience in Cloud Computing (OpenShift, AWS, Azure, GCP)

• Proficient with container technologies (Docker, DockerHub)

• Utilization of Redis as a distributed caching solution

• Experience with messaging systems (Kafka, RabbitMQ)

• Knowledge of RDBMS databases (SQL Server, Oracle, or similar)

• Familiarity with NoSQL databases (Cassandra or others)

• Understanding of card authorization systems (ESSENTIAL)

• Experience with the ISO8583 protocol

• Integration experience with capture networks, authorization networks, and risk management systems

• Knowledge of cryptographic methods applied to payment systems

• Proficient in tools such as Git, Jira, and Java IDEs (IntelliJ, Eclipse)

• Strong command of technical English

🏝️ Benefits

• Flexible working arrangements

• Opportunities for professional development