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N-iX Logo N-iX · IT - Software Development

Senior Java Full-Stack Developer with Angular Experience

Poland; Romania Employment contract, B2B · Job Posted June 16, 2026
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Job Description

We are seeking a highly skilled and motivated Senior Full-Stack Engineer (Backend-Leaning) with 6+ years of professional experience to join our growing core engineering team. In this role, you will be instrumental in designing, scaling, and maintaining our enterprise-grade financial SaaS platform. While you will work across the full stack, your core strength and primary focus will be on building robust, high-performance backend systems using Java and modern enterprise frameworks.

Job Responsibility

  • Design, develop, and maintain secure, scalable, and resilient backend services using Java (OpenJDK), Spring Boot and Axon Framework
  • Architect and optimize relational databases (PostgreSQL) and structured search solutions using Elasticsearch
  • Develop responsive and clean user interfaces using Angular and TypeScript, ensuring seamless integration with backend REST APIs
  • Implement event-driven patterns and messaging queues using Apache Kafka to ensure high-throughput communication
  • Write and maintain comprehensive backend test coverage using Groovy
  • Manage identity and access management solutions by leveraging Keycloak for financial-grade security and authentication
  • Maintain high code quality through rigorous testing, code reviews, and analysis via SonarQube
  • Containerize applications using Docker and Docker Compose, and manage CI/CD deployment pipelines within the Azure Cloud ecosystem
  • Collaborate closely with cross-functional teams to define OpenAPI/Swagger specifications and integrate third-party services like SendGrid

Requirements

  • 6+ years of proven professional experience building robust B2B SaaS platforms or large-scale enterprise systems
  • Strong expertise in Java, Spring Boot, Axon Framework, PostgreSQL, Elasticsearch, and Apache Kafka
  • Proficiency in Groovy
  • Solid experience with Angular and TypeScript
  • Hands-on experience with Docker Compose and Gradle

Nice to have

  • Experience in the financial technology (FinTech) sector or building financial-grade systems
  • Working experience with Keycloak, SonarQube, OpenAPI/Swagger, SendGrid, and Playwright

What we offer

  • Flexible working format - remote, office-based or flexible
  • A competitive salary and good compensation package
  • Personalized career growth
  • Professional development tools (mentorship program, tech talks and trainings, centers of excellence, and more)
  • Active tech communities with regular knowledge sharing
  • Education reimbursement
  • Memorable anniversary presents
  • Corporate events and team buildings
  • Other location-specific benefits
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