April 8, 2026

Java & Kotlin Developer (e-commerce)

Senior • Hybrid

21,000 - 26,000 PLN

Warsaw, Poland

Development of an e-commerce project for a client that is one of the largest companies in this sector in the country. A project utilizing AI and NLP technologies for large-scale analysis and processing of text content, supporting key digital platform functionalities such as search, content quality, and process automation

Our expectations

  • Extensive, at least 5 years, experience with Kotlin and Java witch proven track record in delivering high-complexity solutions.

  • Strong knowledge of Spring, Gradle, Reactor, and Azure Spring Apps.

  • Practical experience working within a microservices architecture.

  • Familiarity with databases such as MongoDB, CosmosDB, and Elasticsearch.

  • Proficiency in designing and working with REST APIs.

  • Experience and a strong interest in AI-based solutions, specifically LLM integration.

  • Ability to lead the design and implementation of complex system functionalities and components.

  • Strong sense of ownership over delivered solutions, including code quality, stability, scalability, and observability (monitoring, logging).

  • Experience in architectural decision-making and evaluating technical trade-offs.

  • Ability to identify and manage technical risks, dependencies, and technical debt.

  • Evaluating technical decisions and high level of autonomy and accountability.

  • Good command of English (B2/C1 level).

  • Readiness to work in a hybrid workmodel, fostering a collaborative and engaging team environment.

Nice to have

  • Hands-on experience with cloud environments (GCP preferred) and Kubernetes.

  • Experience working with large, distributed systems.

  • Experience in cross-team collaboration within complex organizational structures.

  • Providing technical consultancy and knowledge sharing within the project team.

  • Advising on technical best practices and optimizing engineering standards within the project.

Main responsibilities

  • Software development within a development team using agile methodology

  • Participation in team meetings and collaborative creation and execution of assigned tasks

  • Active involvement in delivering increasingly better programming solutions throughout the full project lifecycle — code reviews, testing others’ changes, deployment, maintaining cloud infrastructure, and creating documentation

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Krakow, Poland

130 - 175 PLN

🏢 Summary: Senior-level role focused on designing and delivering scalable AI/ML solutions, including LLMs, RAG, and agent-based systems, from architecture to production deployment. The position involves leading technical decisions, writing high-quality Python code, and building cloud-based microservices solutions. The role also requires translating business needs into robust, production-ready AI systems. 🗂️ Requirements: Several years of software development experience (senior-level), Strong Python proficiency, Solid understanding of ML/AI ecosystem (LLMs, NLP, deep learning), Hands-on experience with RAG, prompt engineering, agent-based systems, Experience with microservices architecture, Experience with databases, Experience with Kubernetes, Experience with CI/CD pipelines, Experience with Azure cloud, English proficiency 📃 Skills: Python, LLMs, RAG, NLP, DeepLearning, PromptEngineering, Microservices, Databases, Kubernetes, CICD, Azure, GCP, Java 🏢 Description: Responsibilities: Design and develop scalable AI/ML solutions (LLMs, RAG, agentic systems) Write high-quality, testable Python code Lead technical architecture and make key design decisions for critical projects Own end-to-end delivery of solutions, from design to production deployment Collaborate with business stakeholders and translate requirements into technical solutions Requirements: Several years of experience as a software developer (senior-level preferred) Very strong Python skills and solid understanding of the ML/AI ecosystem (LLMs, NLP, deep learning) Hands-on experience with RAG, prompt engineering, and agent-based systems Experience with microservices architecture, databases, Kubernetes, and CI/CD pipelines Experience with Azure cloud (GCP as a plus) Basic familiarity with Java is a plus Strong English communication skills