Data Science Tech Lead: Hands-on, Mentorship & Strategy

Sii Poland; Rzeszów; On-site; PLN 420,000 - 540,000; Full time

Benefits offered by this job

Great Place to Work

Centre of internal trainings

Profit sharing

Regular integration events

Job summary

Sii Poland is seeking a technical lead who can own the end-to-end direction of data science engagements, framing client problems, signing off on modeling approaches, reviewing work, and ensuring delivered solutions run reliably.

This is a hands-on role with mentoring responsibilities, where you will shape technical decisions across platforms like Microsoft Fabric, Palantir Foundry, Databricks, Snowflake and cloud services, while maintaining production-grade Python and strong client communication.

Qualifications

• 6+ years in data science with models shipped to production.
• 2+ years leading or mentoring other data scientists.
• Strong communication and client-facing skills.

Responsibilities

• Own the technical direction of data science engagements: solution design, modeling approach, validation strategy, and delivery quality
• Lead and mentor a team of data scientists - code reviews, methodology reviews, career development, and raising the bar on what "done" means
• Stay hands-on: prototype approaches, unblock the team on hard modeling problems, and contribute production-grade Python where it matters most
• Translate client business problems into scoped, estimable data science workstreams, and push back when the problem doesn't need a model
• Set and enforce engineering standards for the team: reproducibility, experiment tracking, testing, and documentation
• Guide platform decisions and delivery across cloud/data ecosystems - Microsoft Fabric, Palantir Foundry, Databricks, Snowflake, and native Azure/AWS/GCP services
• Work with AI Architects, data engineers, and client stakeholders to align technical decisions with business outcomes and timelines
• Represent the team in front of clients: present results, defend methodology, and manage technical expectations

Skills

Python

Mentoring

Communication

English fluency

Tools

Azure

SageMaker

Vertex AI

Databricks

Job description

Sii Poland is seeking a technical lead who can own the end-to-end direction of data science engagements, framing client problems, signing off on modeling approaches, reviewing work, and ensuring delivered solutions run reliably.

This is a hands-on role with mentoring responsibilities, where you will shape technical decisions across platforms like Microsoft Fabric, Palantir Foundry, Databricks, Snowflake and cloud services, while maintaining production-grade Python and strong client communication.