Senior Java Developer 3

ToGo Infinity builds high-performance financial technology systems, powering payments, digital banking, card processing, and cryptocurrency infrastructure. Our focus is security, scalability, and global-grade reliability. This position is remote-first, with need-based meetings at our Karachi office.

Responsibilities:

1. Design and implement Java-based microservices using Spring Boot and Hibernate/JPA.
2. Develop secure RESTful APIs for payments, wallets, and account management.
3. Engineer fault-tolerant, idempotent transaction systems with full audit trails.
4. Implement and optimize high-volume, low-latency transaction workflows.
5. Apply best practices in security (OAuth2, JWT, TLS, PCI-DSS compliance).
6. Integrate with payment networks, banking APIs, and crypto custody solutions.
7. Write unit, integration, and load tests to ensure production-grade quality.
8. Participate in architecture discussions while contributing actively to code development.
9. Support CI/CD, monitoring, and incident response as part of an engineering-driven culture.

1. 5+ years of professional backend development in Java (8 or above).
2. Deep expertise in Spring Boot, Hibernate/JPA, and RDBMS (PostgreSQL, MySQL, or Oracle).
3. Strong background in financial services systems (core banking, payments, settlement, reconciliation).
4. Mastery of transaction integrity, concurrency, and distributed systems design.
5. Hands-on experience with messaging queues / event streaming (Kafka, RabbitMQ).
6. Proficiency in secure coding standards and financial-grade authentication.
7. Solid skills in Docker, Kubernetes, CI/CD pipelines, and Git.