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

  • Kraków, Poland
  • On-site
  • Full-time
  • Posted

on GFT Technologies' careers page

No Polish required

Salaryzł 17k–27k / month

Take-home pay

≈ 11,238 zł – 16,183 zł / month after tax

Estimate: single, no children, 2026 rules

See full breakdown

Not mentioned in the job post: visa sponsorship, relocation, where you can apply from

Type of contract: Employment contract 

Salary range: 17400-26700 PLN gross

What will you do?

You will design and develop production-grade AI and GenAI solutions built primarily in Python, contributing to a large-scale enterprise technology transformation. You will work on LLM-based capabilities, RAG solutions and agentic workflows, ensuring secure integration with an existing Java-based ecosystem. You will contribute to architecture discussions and help deliver scalable, secure and reliable AI solutions that meet enterprise standards.

 

Your tasks

  • Design and develop production-grade AI and GenAI solutions in Python
  • Build and integrate LLM-based applications, RAG pipelines and agentic workflows
  • Develop secure APIs, microservices and integration components
  • Integrate Python-based solutions with existing Java services and enterprise platforms
  • Evaluate and validate AI-generated outputs using measurable quality criteria
  • Apply human-in-the-loop controls, traceability and auditability practices
  • Contribute to solution design and architecture discussions
  • Develop unit, integration, contract and automated evaluation tests
  • Follow secure coding standards and AI governance requirements
  • Contribute to CI/CD pipelines, quality gates and automated security checks
  • Implement logging, monitoring, metrics and tracing
  • Identify technical risks, dependencies and delivery blockers and propose mitigation approaches
  • Support releases, production readiness and incident resolution
  • Collaborate with architects, Tech Leads, QA, platform and operations teams
  • Contribute to engineering standards and continuous improvement initiatives

 

Your skills

  • 5+ years of professional software engineering experience with strong expertise in Python
  • Hands-on experience building and delivering AI and GenAI solutions in production environments
  • Practical knowledge of LLM capabilities, limitations and safe usage patterns
  • Strong 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
  • Ability to independently design and deliver complex technical solutions in enterprise environments
  • Strong understanding of secure software development and operational resilience
  • Experience participating in architecture reviews, design reviews and code reviews

 

Nice to have

  • 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

 

We offer

  • Hybrid work in one 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

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About GFT Technologies

Overview

GFT Technologies is a global AI-driven partner helping businesses unlock data value, accelerate digital transformation, and achieve sustainable impact.