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 client's 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