Lead Software Engineer

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

We are seeking an experienced Lead Software 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.

Sounds like your kind of challenge?

#LI - Hybrid: 6/month form the office in Kraków

What you'll be doing

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.

What you get in return

Flexible cooperation model
Hybrid work setup – 6/month form 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

Who we're looking for

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).

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.

Ready to take the next step?

Submit your application! We look forward to reviewing your profile 😊

Know someone who might be a great fit?
Feel free to share this opportunity using the referral link: Mindbox Referrals System