Lead Backend Engineer with AI/ML skills (Kraków, PL, 30-302)

GFT Technologies SE; Kraków; On-site; PLN 251,000 - 385,000; Full time

Job summary

GFT Technologies SE is seeking an experienced software engineer to join a large-scale enterprise transformation in Kraków. You will design, develop, integrate, and support Java microservices while applying AI-enabled development practices in a regulated environment.

You will work with architects, QA, SRE, and platform teams to deliver secure, scalable services. The role requires hands-on development in Java and Python, with strong database experience and modern CI/CD workflows.

Qualifications

• Requires at least 8 years in software engineering in enterprise environments.
• Experience with Java microservices and Spring Boot in large-scale systems.
• Strong knowledge of databases (Oracle or PostgreSQL) and testing practices.

Responsibilities

• Build, test, release, and support Java microservices and related components.
• Contribute to solution design aligned with target architecture and non-functional requirements.
• Follow CI/CD practices and quality controls; participate in code and security reviews.

Skills

Enterprise-scale experience

Testing discipline

AI-assisted engineering awareness

Tools

Java microservices(Spring Boot)

Python development

Oracle/PostgreSQL

JUnit/Mockito/Testcontainers

Azure cloud

CI/CD pipelines

Job description

Type of contract: Employment contract

Salary range: 22500-34500 PLN gross

What will you do?

You will join a large-scale enterprise transformation initiative focused on modernizing and enhancing critical business applications. In this role, you will design, develop, integrate, and support enterprise-grade Java microservices while contributing to an AI-enabled software development lifecycle. You will work closely with architects, Tech Leads, QA, SRE, and platform teams to deliver secure, scalable, and resilient solutions in a complex, highly regulated environment.

Your tasks

• Build, test, release, and support Java microservices and related components
• Contribute to solution design and integration patterns aligned with target architecture and non-functional requirements
• Identify and help resolve technical risks, dependencies, and delivery blockers
• Follow and contribute to engineering standards, CI/CD practices, and quality controls
• Deliver robust unit, integration, and contract testing
• Participate in design reviews, code reviews, and security reviews
• Use AI-assisted engineering tools while maintaining security, quality, and governance standards
• Apply GenAI development practices including LLM usage, RAG concepts, and agent-based workflows
• Build production-ready services with strong observability and operational readiness
• Support release activities, integrations, and environment readiness
• Collaborate with engineering, architecture, QA, platform, and operations teams
• Contribute to continuous improvement initiatives and engineering excellence

Your skills

• At least 8 years of professional software engineering experience
• Strong hands-on experience with Python development in enterprise-scale environments
• Good practical knowledge of Java and experience working with Java microservices based on Spring Boot
• Experience working in enterprise-scale environments
• Strong knowledge of Oracle or PostgreSQL databases
• Experience with schema design, performance optimization, and transactional systems
• Strong unit and integration testing experience using tools such as JUnit, Mockito, and Testcontainers
• Experience with API and contract testing
• Hands-on experience with Azure cloud services
• Experience with CI/CD pipelines and quality gates