Senior Java Backend Developer

Luxoft; Kraków; On-site; PLN 240,000 - 360,000; Full time

Job summary

Luxoft in Kraków is seeking a senior backend engineer to design, develop, and maintain cloud-native microservices in Java 11+ with Spring Boot. You will build REST APIs and message-driven services, deploy on Azure AKS, and define infrastructure with Terraform.

Responsibilities include containerized apps, CI/CD with GitLab or GitHub, and AI-assisted development tools to boost productivity while ensuring reliability and observability.

Qualifications

• Strong object-oriented programming with Java 11+
• Extensive experience with Spring Boot and Spring ecosystem
• Hands-on development of Web and REST APIs and message-driven services
• Experience building and running containerized applications
• Strong Azure cloud experience including IaC with Terraform
• Kubernetes (AKS) and container orchestration
• Compute and storage solutions in Azure
• Solid Linux/Unix skills and scripting
• Experience with AI-assisted development tools integrated into workflows
• Experience with GitLab/GitHub and IDEs (IntelliJ/VSCode)

Responsibilities

• Design, develop, and maintain backend services in a microservices architecture using Java 11+ and Spring Boot.
• Build and enhance RESTful APIs and message-driven services for securitization workflows.
• Develop and deploy cloud-native apps on Microsoft Azure, including AKS orchestration.
• Use Terraform to define and manage infrastructure as code.
• Work with Docker and CI/CD pipelines (GitLab or GitHub).
• Implement integrations using Kafka, IBM MQ, or Tibco EMS.
• Collaborate on scalable, resilient system design.
• Develop and optimize database interactions (Azure SQL/Oracle/Sybase).
• Write unit, integration, and end-to-end tests; ensure observability and monitoring.
• Utilize Linux/Unix troubleshooting and scripting; leverage AI-assisted tools.

Skills

Java 11+

Spring Boot

REST APIs

Containerized apps

Azure cloud

Terraform IaC

AKS Kubernetes

Linux/Unix

GitHub Copilot

GitLab/GitHub

IntelliJ/VSCode

Tools

Docker

Kafka

IBM MQ

Tibco EMS

Terraform

AKS

Job description

Project description

The project is part of the Credit, Asset-backed & Securitized Products (CASP) division of an investment bank, focusing on platforms that support securitization and structured finance products. The current primary objective is migrating existing on-premise systems to a modern Microsoft Azure cloud environment, transforming legacy architecture into scalable, cloud-native solutions. It involves rebuilding and adapting systems used for structuring, processing, and distributing securities such as ABS, MBS, and CLOs. The platform integrates with trading, risk, and regulatory systems to support both real-time and batch data processing. The target architecture follows a microservices-based approach with containerized services deployed on Azure Kubernetes Service (AKS). Infrastructure provisioning and configuration are managed using Terraform as Infrastructure as Code. The system leverages REST APIs and event-driven communication to ensure scalability and flexibility during and after migration. Special focus is placed on maintaining data consistency, performance, and regulatory compliance throughout the transition. The project emphasizes high availability, resilience, and observability in a complex financial ecosystem. AI-assisted development tools like GitHub Copilot are integrated to enhance engineering productivity. The environment promotes modern engineering practices, automation, and continuous improvement.

Responsibilities

• Design, develop, and maintain backend services using Java 11+ and Spring Boot within a microservices architecture.Build and enhance RESTful APIs and message-driven services supporting securitization and credit workflows.Develop and deploy cloud-native applications on Microsoft Azure, including AKS-based container orchestration.Use Terraform to define and manage infrastructure as code.Work with containerization technologies (Docker) and contribute to CI/CD pipelines using GitLab or GitHub.Implement integrations using messaging systems such as Kafka, IBM MQ, or Tibco EMS.Collaborate on system design, ensuring scalability, resilience, and alignment with distributed architecture principles.Develop and optimize database interactions using Azure SQL, Oracle, or Sybase.Write and maintain unit, integration, and end-to-end tests to ensure code quality and reliability.Implement monitoring, logging, and observability practices to support production systems.Utilize Linux/Unix skills for troubleshooting and scripting.Leverage AI-assisted development tools to improve efficiency while maintaining high coding standards.

SKILLS

Must have

• Strong object-oriented programming skills with Java 11+
• Extensive experience with Spring Boot / Spring ecosystem
• Hands-on development of Web and/or REST APIs and message-driven services
• Experience building and running containerized applications
• Strong experience with Azure cloud, including:
• Infrastructure as Code (IaC) using Terraform
• Kubernetes (AKS) and container orchestration
• Compute (VMs) and storage solutions (e.g., Azure Files)
• Solid Linux/Unix skills (shell scripting, system understanding)
• Experience with AI-assisted development tools (e.g., GitHub Copilot) integrated into development workflows
• Experience with GitLab / GitHub, IntelliJ / VSCode

Nice to have

• Microservices architecture and system design
• Messaging and integration technologies: Kafka, IBM MQ, Tibco EMS
• Relational databases: Azure SQL, Oracle, Sybase
• Testing frameworks (unit, integration and E2E testing)
• CI/CD pipelines (GitLab / GitHub)
• Monitoring and observability practices