About this role
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