Backend Engineer (Java + Kafka, microservices), 4-6 years of experience. Poland only (вакансія неактивна)

We are a U.S.-based fintech startup operating in the investment and financial services space. Our distributed teams work across Poland, the United States, and Ireland, collaborating on technology-driven solutions related to stocks and investments.

Security, compliance, and the responsible handling of sensitive financial data are central to how we operate, as we build scalable products in a regulated environment.

Responsibilities

— Develop high-quality Java microservices using Spring Boot.
— Build Kafka producers, consumers, and stream-processing apps.
— Design event-driven architectures with reliability and performance.
— Implement service resiliency patterns such as retries and circuit breakers. — Collaborate on distributed system design and integration.

• Ensure logging, tracing, and monitoring of backend services.
• Support performance tuning and root cause analysis.

• Skills
  — Strong in Java, Spring Boot, microservices patterns.
  — Hands-on Kafka development—streams, partitions, consumer groups. — Knowledge of distributed systems architecture.
  — Familiarity with Docker, cloud-native packaging.
  — Experience in REST APIs, schema evolution, and contracts.
  — Understanding of observability (logs, metrics, traces).
  — Good debugging and performance optimization skills

Please read before applying:

The client is building a product in the bank/investment/brokerage systems niche, and their investors have strict security and compliance requirements, where every person will go through a background check.

Why Poland?

For background check — you must be a taxpayer in Poland for 2+ years.