Back-end Developer Java

Responsibilities

• Developing and maintaining the core architecture for error-free, scalable, and secure payment processing.
• Building robust APIs and integrations with banks, software houses, and large enterprises, including technical support during deliveries.
• Addressing complex challenges regarding retries, concurrent processing, and handling external system failures.
• Identifying and resolving bottlenecks in queries, data models, and processing speed as volume grows.
• Resolving and analyzing production incidents during office hours (there is no on-call / standby service).
• Critically reviewing (AI-generated) code for quality, security, and maintainability before it goes to production.

Profile & Requirements

• Experience: Several years of work experience as a back-end developer with Java and Spring. Knowledge of Go is a plus or can be learned quickly.
• Databases: Thorough knowledge of relational databases (preferably PostgreSQL), including query optimization, indexing, and transaction management.
• Architecture: Excellent insight into concurrency, failure modes, and designing fault-tolerant systems.
• Quality: Experience in analyzing and structurally resolving production incidents and a focus on writing clean, testable, and maintainable code.
• Ownership: An independent working style, strong communication skills to justify technical choices and trade-offs, and the willingness to give and receive active code reviews.
• Languages: Fluent command of English. Knowledge of Dutch is a clear asset.
• Location & Timezone: Residing in a timezone within +/- 1 hour of CET to promote good collaboration during daily stand-ups.
• Background: Experience in FinTech, the banking sector, or payment processing is a plus. Demonstrable experience and practical knowledge carry more weight than a specific degree.

Tech Stack

• Languages & Frameworks: Java, Spring, Go
• Databases & OS: PostgreSQL, Linux
• Integrations: REST API's, Microservices