Key Responsibilities:
· Design and implement integrations between internal systems and external financial providers (payments, custody, KYC/KYB, trading platforms)
· Define and maintain system architecture, including API flows and system interaction diagrams. Ability to explain and teach junior developers
· Build robust integration patterns, including:
o Webhook processing and external callbacks
o Idempotency and retry mechanisms
o Error handling, reconciliation, and fallback strategies
o State management across distributed systems
· Ensure data consistency between internal ledger systems and external providers
· Build and maintain event-driven and asynchronous architectures (e.g. queues, background workers
· Contribute to CI/CD pipelines, deployment processes, and environment stability
· Perform code reviews, debugging, and production issue resolution
· Collaborate closely with product, compliance, and DevOps teams to deliver reliable financial features
Requirements:
· 5+ years of professional Java development experience
· Strong proficiency in Java 17+, Spring Framework, Spring Boot, REST APIs, and microservices architecture
· Solid understanding of OOP, design patterns, and core software engineering principles
· Hands-on experience with relational and document databases (PostgreSQL and MongoDB)
· Experience with asynchronous messaging systems (Kafka, RabbitMQ, or similar)
· Strong understanding of idempotency, retry strategies, and failure handling in distributed systems
· Experience integrating webhooks and handling external API callbacks
· Experience designing high-availability and fault-tolerant systems
· Experience with OAuth2, JWT, and modern API authentication mechanisms
· Experience with financial systems, payments, or trading platforms
· Strong testing practices (JUnit, integration testing, TDD)
· Comfortable working in Agile/Scrum environments
· Familiarity with cloud platforms (AWS, Azure, or GCP) is an advantage
· Bachelor's or Master's degree in Computer Science or a related field