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

GFT · Kraków, Poland · On site · 6 days ago

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Posted October 08, 2026 · Read from GFT
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Type of contract: B2B contract

Salary range: 155-205 PLN/H

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

Requirements

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

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

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

Employer
GFT
Location
Kraków, Poland · On site