Senior Java Developer

Luxoft Poland; Kraków; Hybrid; PLN 180,000 - 240,000; Full time

Benefits offered by this job

MyBenefit program

Fully remote recruitment

LuxTalent platform

Internal mobility

Higher net salary

Job summary

Luxoft Poland is seeking an experienced backend engineer to join a long-term, enterprise-scale project in Kraków. You will design, develop, and maintain mission-critical Java 11+ services using Spring Boot within a distributed microservices environment.

Collaborating with architects, QA, DevOps, and product owners, you will drive technical direction, implement REST/SOAP APIs, Kafka events, BPM workflows, and robust security with OAuth2/JWT. Hybrid work model applies.

Qualifications

• 7+ years of enterprise backend development.
• Strong Java 11+ and Spring Boot expertise.
• Experience with microservices architecture and event-driven patterns.
• Proficient in relational and document databases.
• Security expertise: OAuth2/JWT/Spring Security.
• Experience with Agile methodologies.
• Excellent communication and collaboration.

Responsibilities

• Design, develop, and maintain enterprise backend services with Java 11+ and Spring Boot.
• Shape distributed microservices architectures.
• Integrate REST and SOAP APIs and Kafka events.
• Develop BPM workflows using Flowable.
• Ensure code quality via SOLID, Clean Code, and patterns.
• Write unit/integration tests (JUnit/TestNG/Mockito/WireMock).
• Work with PostgreSQL, MongoDB, and Cosmos DB.
• Implement OAuth2/JWT/Spring Security authentication.
• Collaborate with DevOps on Docker and Kubernetes deployments.
• Provide technical guidance and code reviews.
• Collaborate with QA, DevOps, and product owners.

Skills

Java 11+

Spring Boot

Microservices

JUnit

TestNG

Mockito

WireMock

OAuth2

JWT

Spring Security

PostgreSQL

MongoDB

Azure Cosmos DB

Cloud

Agile

Docker

Kubernetes

Flowable BPM

Tools

Docker

Kubernetes

Flowable BPM

PostgreSQL

MongoDB

Azure Cosmos DB

Job 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
• Provide technical guidance, perform code reviews, and advocate for engineering best practices
• Collaborate closely with cross-functional teams, including QA, DevOps, and product owners

Mandatory Skills Description:

• 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)
• Security & Authentication (OAuth2, JWT, Spring Security)
• Experience with Agile mode of working
• Excellent communication and collaboration skills
• Familiarity with Cloud based technologies

Hybrid work (3 days/week from the office)

What do we offer our employees?

• Copyrights which means higher net salary for Developers
• Fully remote recruitment process
• Stable employment based on an employment contract
• MyBenefit program (sports card, well-being program etc.)
• Employee assistance program for you and your family! (consultations with a psychologist, coaching sessions, assistance in private life)
• LuxTalent platform (webinars, training, courses with certificates)
• Internal Mobility program - possibility of rotation between projects, locations, accounts