Lead Data Engineer

Technologies we use

Expected

• PySpark
• Apache Iceberg

Operating system

• Windows

About the project

We are seeking an experienced Lead Data Engineer to join our client's global development team and drive the design and implementation of next-generation data platforms. You will work closely with teams in Poland, the UK, India, and China to enhance platform capabilities, improve performance, and ensure operational excellence.

This is how we organize our work

This is how we work

• at the client's site
• agile

Your responsibilities

• Analyse and capture functional & non-functional requirements for near-term deliveries and long-term evolution.
• Design and implement data pipelines and table management workflows using PySpark and Apache Iceberg.
• Drive Apache Iceberg performance and cost optimisation (e.g., file sizing, partitioning, clustering, query efficiency).
• Manage and improve Apache Iceberg maintenance (compaction, rewrite, snapshot/metadata management, orphan file handling).
• Apply strong understanding of Iceberg internals (metadata layout, schema evolution, partition specs).
• Ensure high engineering standards via code reviews, test automation, CI/CD, observability, and production readiness.
• Provide support for owned services and datasets, including on-call duties.
• Mentor and coach junior engineers; lead technical design discussions.
• Note: Detailed project information will be shared during the recruitment process.

Our requirements

• Strong hands-on experience with PySpark (DataFrame APIs, tuning, debugging).
• Practical knowledge of Apache Iceberg, including:
• Optimisation techniques (partitioning strategy, file sizing, layout).
• Internal architecture understanding (snapshots, manifests, schema evolution).
• Maintenance operations (rewrite/compaction, orphan file cleanup, metadata handling).
• Solid software engineering fundamentals: clean, testable, maintainable code, problem-solving.
• Experience with CI/CD pipelines, observability, stability improvements in production systems.
• Ability to work in global teams, excellent communication skills.
• Ownership mindset and responsibility for end-to-end delivery.
• Fluency in English (spoken & written).

What we offer

• Flexible cooperation model
• Hybrid work setup – 6 days a month from the office in Kraków
• Collaborative team culture – work alongside experienced professionals eager to share knowledge.
• Continuous development – access to training platforms and growth opportunities.
• Comprehensive benefits – including Interpolska Health Care, Multisport card, Warta Insurance, and more.
• High quality equipment – laptop and essential software provided.

This is how we work on a project

• Continuous Deployment
• Continuous Integration
• testing environments

Benefits

• sharing the costs of sports activities
• private medical care
• sharing the costs of professional training & courses
• life insurance

Joining this project you’ll become part of Mindbox – a tech-driven company where consulting, engineering, and talent meet to build meaningful digital solutions. We’ll back you up every step of the way, accelerate your development, and ensure your skills make a difference.

Mindbox Sp. z o.o.

At Mindbox, we connect top IT talents with technology projects for leading enterprises across Europe.

Our focus is on matching your skills with work that matters – projects that use modern tech stacks, solve real business challenges, and give you space to grow. By joining us, you’ll deliver technology solutions for well-known brands, supported by the Mindbox team that values knowledge-sharing and continuous development. We make sure you have the tools, flexibility, and guidance to do your best work – and to keep moving forward in your career.