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Luxoft is an IT consulting and software engineering services firm that provides bespoke technology solutions to external clients, often operating as a staff augmentation or professional services provider.

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Posted 5d ago

Senior Java Developer

@ Luxoft
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Krakow, Lesser Poland Voivodeship, Poland
OnsiteFull Time
Responsibilities:designing services, developing services, mentoring engineers
Requirements Summary:Java 11+ and Spring Boot experience, 7+ years enterprise development, microservices, Kafka, REST/SOAP, PostgreSQL/MongoDB/Azure Cosmos DB, unit/integration testing, Docker/Kubernetes, OAuth2/JWT, Agile; English B2.
Technical Tools Mentioned:Java, Spring Boot, PostgreSQL, MongoDB, Azure Cosmos DB, JUnit, TestNG, Mockito, WireMock, Kafka, REST, SOAP, OAuth2, JWT, Spring Security, Docker, Kubernetes, Flowable, Spring Webflux
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Job Description

Project description

You will join a long-term, enterprise-scale project for a global client in the investment banking domain. The project focuses on building and evolving a set of mission-critical backend services that support complex business workflows, regulatory processes, and system integrations across the bank’s ecosystem.

The platform is based on a distributed microservices architecture, leveraging Spring Boot, event-driven communication, and BPM-driven process orchestration. The system operates in a cloud-enabled, containerized environment, with a strong emphasis on security, scalability, resiliency, and maintainability.

You will work closely with architects, QA engineers, DevOps, and business stakeholders in an agile setup, contributing not only code but also technical direction, best practices, and mentoring.

Responsibilities

  • Design, develop, and maintain enterprise-grade backend services using Java 11+ and Spring Boot
  • Contribute to the design and evolution of distributed microservices architectures
  • Implement and integrate REST and SOAP APIs and event-driven solutions using Kafka
  • Develop and maintain business process workflows using a BPM engine (preferably Flowable)
  • Ensure high standards of code quality by applying SOLID principles, Clean Code, and design patterns
  • Write and maintain comprehensive unit and integration tests using JUnit, TestNG, Mockito, and WireMock
  • Work with relational and document databases such as PostgreSQL, MongoDB, and Azure Cosmos DB
  • Implement security and authentication mechanisms using OAuth2, JWT, and Spring Security
  • Collaborate with DevOps teams on containerization and deployment using Docker and Kubernetes
  • Participate actively in agile ceremonies (refinement, planning, reviews, retrospectives)
  • Provide technical guidance, perform code reviews, and advocate for engineering best practices
  • Collaborate closely with cross-functional teams, including QA, DevOps, and product owners

Skills

Must have

  • Solid experience in JVM programming languages (ideally Java11+) and design patterns
  • Frameworks: Spring Boot
  • Proven track record of enterprise level application development for 7+ years
  • Understanding of distributed microservices architectures and communication patterns
  • Experience with relational and document databases (PostgresSQL, MongoDB, Azure Cosmos)
  • Testing Frameworks (JUnit, TestNG, Mockito, WireMock)
  • Messaging & Integration (Kafka, REST, SOAP)
  • Security & Authentication (OAuth2, JWT, Spring Security)
  • Containerization & Orchestration (Docker, Kubernetes)
  • Advocating engineering best practices (SOLID, Clean Code)
  • Experience with Agile mode of working
  • Excellent communication and collaboration skills
  • Familiarity with Cloud based technologies

Nice to have

  • experience in or willing to learn Java reactive programming/ Spring Webflux
  • springboot Microservices
  • experience with NoSQL databases (ideally MongoDB or CosmosDB)
  • familiarity with BPMN (eg Flowable)

Other

Languages: English: B2 Upper Intermediate

Seniority: Senior