Senior Backend Engineer (Python&Java) with AI/ML skills at GFT Poland – Kraków | Jobyssey

We are GFT Poland

WE KNOW how to tackle complex issues with innovative approach to deliver the highest value. Our reputation has been built around one simple rule: we do not overpromise, WE DELIVER. We deliver to our employees, clients and partners. WE GROW as you grow, so investing in you is our business strategy. Caring for each other is our priority. WE CARE who you are, what you need, how you feel. WE CARE to smile, have fun and develop as human beings.

Why Choose GFT?

A culture of top performance
Deep tech IT engineering & consulting
1200 skilled & top-class experts
77% of the team are regular/senior
Products that contribute to a sustainable world
Competitive salary and benefits
Ambitious projects, trainings and tools you need to flourish
Google Cloud Partner of the Year - for going above and beyond for customers

What will you do?

You will build production-grade AI and GenAI solutions using Python, contributing to a large-scale enterprise technology transformation. You will work on LLM-based capabilities, RAG solutions, agentic workflows and integrations with an existing Java-based ecosystem while ensuring high standards of security, testing, governance and operational resilience.

We offer

Hybrid work in one of our client's office (Kraków) 6-8 days a month
Working in a highly experienced and dedicated team
Benefit package tailored to your needs (medical, sport, lunch subsidy, life insurance, etc.)
Online training and certifications
Access to e-learning platform
Social events

4+ years of professional software engineering experience in Python and Java
Hands-on experience building AI and GenAI solutions
Practical knowledge of LLM capabilities, limitations and safe usage patterns
Experience designing and implementing RAG solutions
Experience with agentic or tool-using AI workflows
Experience with prompt engineering, evaluation and validation approaches
Knowledge of AI governance, security, traceability and auditability
Experience developing microservices and APIs
Previous commercial experience with Java and Java-based enterprise systems
Ability to understand, review and occasionally modify Java code
Experience with relational databases such as PostgreSQL or Oracle
Knowledge of schema design, transactional integrity and performance optimization
Strong unit, integration and contract testing practices
Experience with CI/CD pipelines and quality gates
Hands-on experience with cloud platforms (Azure preferred)
Knowledge of REST, messaging and event-driven integration patterns
Experience making pragmatic technical decisions in complex enterprise environments
Strong understanding of secure software development and operational resilience

Nice to have

Previous strong hands-on Java and Spring Boot development experience
Experience delivering solutions in regulated financial services
Experience with Kubernetes, containers and service mesh technologies
Knowledge of modern observability tooling
Experience with performance engineering and resilience testing
Experience with prompt and model version management
Experience establishing AI-enabled SDLC practices
Experience measuring the quality and productivity of AI-assisted development

Senior Backend Engineer (Python&Java) with AI/ML skills

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