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