Senior Java Backend Lead — Cloud Native, Scalable APIs

INFOLET SP. Z O.O.; Kraków; On-site; PLN 140,000 - 210,000; Full time

Benefits offered by this job

Relocation package (4500 PLN)

Extended medical care

Multisport card

Life insurance

Job summary

INFOLET SP. Z O.O. in Kraków is seeking a Senior Java Developer with 7+ years of professional experience to join our high-performing backend team.

You will design, implement, and optimize large-scale Java services for travel and transportation platforms, with a cloud-native focus and enterprise-grade architecture. You will mentor peers, own critical modules, and collaborate with product and SRE teams to ensure reliability, performance, and scalable delivery, while promoting engineering

Qualifications

• 7+ years of professional experience as a Java Developer.
• Expert knowledge in Java Core Multithreading.
• Experience with Git, Maven, Jenkins, Docker, Unix/Linux.
• Experience with noSQL/Couchbase.
• Experience with REST/JSON/XML/Web Services.
• Experience with JUnit/Unit Testing.
• Experience with Spring framework.
• Experience with cloud-based technologies (GCP).
• Excellent analysis and problem-solving skills.
• Good communication skills in English, written and verbal.
• Demonstrate a winning culture.
• Ability to handle multiple tasks simultaneously.

Responsibilities

• Design, develop, test, and debug complex software solutions.
• Design and build prototype applications.
• Research best practices, new tools, and technology.
• Work closely with technical staff to understand problems with software and resolve them.
• Work closely with the Product team to understand business requirements.
• Assist in the development of software technical documentation.
• Support SRE in our effort to evolve CI/CD processes and stability.

Skills

Java

Multithreading

English communication

Analytical thinking

Problem solving

Tools

Git

Maven

Jenkins

Docker

Unix/Linux

REST/JSON/XML/Web Services

JUnit

Spring framework

GCP

Job description

INFOLET SP. Z O.O. in Kraków is seeking a Senior Java Developer with 7+ years of professional experience to join our high-performing backend team.

You will design, implement, and optimize large-scale Java services for travel and transportation platforms, with a cloud-native focus and enterprise-grade architecture. You will mentor peers, own critical modules, and collaborate with product and SRE teams to ensure reliability, performance, and scalable delivery, while promoting engineering