Lead Java Backend Architect – Cloud-Native, Scalable Services

SOLID.Jobs; Kraków; On-site; PLN 180,000 - 240,000; Full time

Job summary

SOLID.Jobs in Kraków is seeking a Senior Java Developer to join our high-performance team building modern, large-scale backend systems for travel and transportation.

You will lead backend design, implementation, and API optimization for mission-critical platforms used by millions of travelers worldwide.

As a Senior Developer, you will mentor engineers, shape system architecture, and ensure performance and reliability while collaborating with product and SRE teams to evolve CI/CD processes.

Qualifications

• 7–9 years of backend software development experience.
• Strong proficiency in Java and Java EE technologies.
• Deep knowledge of Spring, Hibernate, and RESTful web services.
• Solid grasp of OOP principles and design patterns.
• Experience working with XML and relational databases (Oracle, SQL).
• Familiarity with Linux-based development environments.
• Experience with build tools like Ant, Maven, or Gradle.
• Hands-on experience with Apache Camel and ServiceMix.
• Strong communication and team leadership skills.

Responsibilities

• Design, implement, and optimize backend services and APIs.
• Lead a team to design and implement backend solutions.
• Mentor developers and promote engineering excellence.
• Collaborate with Product to understand business requirements.

Skills

Java

Spring

Hibernate

RESTful web services

OOP principles

Linux-based development

Build tools

Apache Camel

ServiceMix

Team leadership

Tools

Ant

Maven

Gradle

XML

Oracle

SQL

JBoss

JMX

Drools

JMS

Job description

SOLID.Jobs in Kraków is seeking a Senior Java Developer to join our high-performance team building modern, large-scale backend systems for travel and transportation.

You will lead backend design, implementation, and API optimization for mission-critical platforms used by millions of travelers worldwide.

As a Senior Developer, you will mentor engineers, shape system architecture, and ensure performance and reliability while collaborating with product and SRE teams to evolve CI/CD processes.