Senior AI/Data Engineer

Salary: 125 - 175 PLN/h net+vat on B2B

Work model: hybrid (approx. 1 time a week at the office located in Gdynia / Gdańsk / Warsaw / Kraków / Rzeszów)

Why choose this offer?

• Work at the intersection of AI and data engineering on real, production-grade solutions

• Direct impact on building AI-driven products used by customers globally

• Opportunity to work with LLMs and modern NLP techniques

Project

We are seeking an experienced AI Engineer to join a team that sits at the intersection of data engineering and applied AI. The team is responsible for building the data foundation that powers Client's products- ingesting, processing, and enriching public procurement data from a wide range of sources- as well as developing AI-driven features that turn that data into action able intelligence for customers.

What you will be working on

• AI-powered document intelligence: Using web scraping and LLMs to extract insight from unstructured public data sources, surfacing signals that help customers stay ahead of the market
• Enterprise data platform (EDP) integration: Ingesting, normalising, and joining data from multiple external sources into our EDP, making it accessible and useful for downstream service sacross the organisation
• External API data ingestion: Building and maintaining integrations with third-party APIs to continuously gather relevant data at scale
• CI/CD pipeline ownership: Setting up and maintaining robust CI/CD pipelines for the services the team develops and operates

Expected competences

• 5+ years in Python
• 2+ years of AWS experience (Lambda, Step Functions, ETL pipelines)
• Experience with infrastructure as code (e.g. Terraform, AWS CDK)
• Solid understanding of core NLP techniques: TF-IDF, tokenisation, K-NN, documentembeddings, and textual similarity
• Hands-on experience developing solutions powered by cloud-hosted LLMs (OpenAI, Claude,etc.)
• Experience working with enterprise data platforms (EDP) and/or data lake architectures (e.g.AWS Lake Formation, S3-based data lakes, Delta Lake, or similar)
• Experience building and maintaining CI/CD pipelines

Preferred Experience

• Apache Spark for large-scale data processing
• AWS CDK (TypeScript)
• Deep learning experience: transformers, dimensionality reduction techniques
• Working with embeddings, fine-tuning, and evaluating LLMs
• Implementing web crawlers and agentic AI systems
• Experience with Docker and container orchestration (Kubernetes, ECS, or similar)
• API development (FastAPI, Flask, or similar)
• Java knowledge is an asset- particularly for integrating with or contributing to existing JVM-based backend services

Technologies you'll work with

• Python

• AWS (Lambda, Step Functions, S3)

• Terraform / AWS CDK

• LLMs (OpenAI, Claude or similar)

• NLP techniques (TF-IDF, embeddings, similarity models)

• CI/CD pipelines

• Data platforms / Data Lakes (e.g. AWS Lake Formation, Delta Lake)

Client – why choose this particular client from the Jit portfolio?

Our client is a Scandinavian supplier of software and services for purchasing and tendering processes in highly formalized conditions, such as orders in accordance with public procurement law at the level of the European Union or individual member states. The delivery center is located in Utrecht. Client’s platforms allow to announce tenders and conduct the entire procedure of collecting and evaluating offers at every stage of the purchasing process. They are used both by public administration bodies at various levels in European countries and by purchasing departments of large companies and corporations.

About Jit Team

The Human factor of IT - it's not just a slogan, it's a philosophy. The foundation of Jit Team is people, which is why we prioritise you. We employ over 700 experienced experts. We create highly specialised teams for clients from all over the world. We offer team members developmental projects, a wide range of benefits and a proprietary professional development programme.

Behind our maxim are also charitable and educational activities. We support pupils and students by donating learning equipment. We offer internships to help launch careers in IT. We support water rescuers and hospitals by providing the necessary equipment. We are a Polish company and we share what we have achieved over 15 years of activity. By supporting indigenous initiatives, we ensure the circulation of good energy.