Expert Java Consultant

Type of contract: B2B contract

Salary range: 155-205 PLN/H

What will you do?

You will design, build, and maintain production-grade software solutions with a strong focus on AI-powered applications, modern backend and frontend development, and cloud-native platforms. You will work on integrating large language models into business processes, developing agentic AI solutions, improving CI/CD pipelines, and ensuring reliability, observability, and scalability across the technology landscape.

Your tasks

• Design, build, and deliver production-quality services
• Develop and optimize CI/CD pipelines, testing processes, and platform observability
• Design, evaluate, and optimize prompts for production LLM applications
• Build and manage prompt libraries and versioning strategies
• Translate business requirements into structured prompt specifications
• Design and implement agentic AI solutions and multi-agent workflows
• Build LLM observability, evaluation, logging, and guardrail frameworks
• Support responsible AI adoption through validation and risk mitigation practices
• Develop backend services using Java and Spring Boot
• Build frontend applications and integrations using React
• Work with cloud platforms, databases, messaging systems, and Kubernetes environments

Requirements

• Strong experience with Java and Spring Boot
• Experience building REST APIs and event-driven services
• Strong React development skills
• Experience with PostgreSQL and Redis
• Experience with Kafka or similar messaging platforms
• Hands-on experience with prompt engineering for production LLM applications
• Knowledge of prompt evaluation frameworks and tooling
• Understanding of tokenization, context limits, temperature tuning, and LLM behavior
• Experience designing prompts for tool calling, structured outputs, and multi-turn conversations
• Experience with Kubernetes
• Experience building and maintaining CI/CD pipelines
• Experience with Terraform
• Experience working with AWS, Azure, or GCP
• Openness to work hybrid from our client's office (Kraków) 6 days a month

Nice to have

• Experience with LangSmith, PromptFlow, Braintrust, or similar tools
• Experience designing memory-augmented AI systems
• Experience with multi-agent architectures
• Knowledge of AI governance and responsible AI practices
• Experience with performance optimization and platform observability

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