Hybrid Senior AI Backend Engineer (Python & Java)

GFT TECHNOLOGIES SE; Kraków; Hybrid; PLN 172,000 - 220,000; Full time

Job summary

GFT Poland seeks a Senior Backend Consultant to drive AI/ML-focused backend development in Kraków. You will build production-grade Python/Java AI solutions, integrating LLM-based capabilities into the enterprise ecosystem.

You will collaborate with architects and platform teams, delivering scalable microservices, secure APIs and CI/CD pipelines, while upholding governance and security standards.

Qualifications

• 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.
• Openness to work hybrid from our client's office (Kraków) 6-8 days a month.

Responsibilities

• 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.
• Contribute to technical design and architecture decisions.
• Develop unit, integration and contract testing practices.
• 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 and resolve technical risks, dependencies and delivery blockers.
• Support releases, production readiness and incident response.
• Collaborate with architects, Tech Leads, QA, platform and operations teams.
• Contribute to engineering standards and continuous improvement.

Skills

Python

Java

AI/ML

LLM

RAG

CI/CD

Azure

Tools

PostgreSQL

Oracle

Kubernetes

Job description

GFT Poland seeks a Senior Backend Consultant to drive AI/ML-focused backend development in Kraków. You will build production-grade Python/Java AI solutions, integrating LLM-based capabilities into the enterprise ecosystem.

You will collaborate with architects and platform teams, delivering scalable microservices, secure APIs and CI/CD pipelines, while upholding governance and security standards.