Senior Java Developer (Cloud-Native / Fintech)

Position Overview

Banank is seeking an experienced Senior Java Developer to join our engineering team and help build the next generation of our cloud-native digital banking platform. In this role, you will design and implement high-performance backend services, develop event-driven systems, and contribute to the evolution of our integration and messaging architecture.

You will collaborate closely with a high-caliber international team to deliver secure, reliable, and scalable solutions that power Banank’s financial products.

Our Tech

Stack

Languages: Java 21+

Frameworks: Quarkus (primary), GraalVM, Spring Boot

Messaging: NATS (Event-driven architecture)

Data: PostgreSQL, Schema Design & Optimization

Infrastructure: Kubernetes, Docker, CI/CD pipelines

Key Responsibilities

Backend Excellence: Design, develop, and maintain high-performance microservices using Java and modern frameworks.

Event-Driven Systems: Build and scale robust, asynchronous systems leveraging NATS or similar high-performance messaging platforms.

Architectural Influence: Contribute to the evolution of our cloud-ready architecture, ensuring scalability, resilience, and security.

API Leadership: Build and optimize RESTful and asynchronous APIs following industry best practices.

Quality & Mentorship: Deliver clean, well-documented code with comprehensive test coverage and provide meaningful peer reviews.

DevOps Collaboration: Partner with DevOps teams to integrate services into automated CI/CD pipelines for seamless deployments.

Innovation: Stay current with emerging trends and proactively suggest improvements to our processes and tech stack.

Requirements

Java Mastery: Strong expertise in Java and enterprise-grade backend development.

Modern Frameworks: Hands-on experience building microservices, ideally with Quarkus.

Experience with Spring Boot is a significant plus.

Performance Optimization: Familiarity with GraalVM for optimizing Java applications is highly valued.

Asynchronous Mindset: Solid understanding of event-driven systems and experience with NATS, Kafka, or similar technologies.

Database Pro: Strong experience with relational databases (schema design, query optimization, transactions).

Cloud-Native Experience: Proven track record of delivering scalable enterprise software in containerized environments (Docker/K8s).

Soft Skills: Open-minded, curious, and eager to explore new approaches in a fast-paced environment.

Communication: Strong written and spoken English is a must.

Authorization: Must be legally authorized to work or provide services within the EU.

Why Banank?

Zero Legacy: Work on a modern, cloud-native stack without the burden of outdated systems.

Direct Impact: Your architectural decisions and code will directly shape the future of our banking platform.

No Corporate BS: We value engineering excellence, rapid iteration, and transparent communication.

Growth: Competitive compensation and the opportunity to grow with a fintech that is scaling fast across Europe.