Tech Lead Java Engineer

Type of contract: Employment contract

Salary range: 17400 - 26700 PLN gross

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

Your skills

• 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

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 offer

• Hybrid work in our clients office (Kraków) 6 days a month
• Working in a highly experienced and dedicated team
• Benefit package tailored to your needs (medical sport lunch subsidy life insurance etc.)
• Online training and certifications
• Access to e-learning platform
• Social events