Principal Software Engineer Jobs

Invisible Technologies

Location:
Poland, Warsaw

Category:
IT - Software Development

Contract Type:
Not provided

Salary:

130000.00 - 168000.00 USD / Year

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Job Description:

Principal Engineer in the AI Training team serving high-value foundation model labs accounts using internal tooling. Role involves learning tooling deeply, pushing bounds of customization via scripting, ingestion, and export, and helping reduce manual work between non-technical and technical team members.

Job Responsibility:

Partner with AI Training Delivery teams to generate high quality, curated and audited data for AI Researchers
Data Ingestion into NextGen Marketplace Operations Management Hub
Python and/or Shell Scripting to support transforming, validating, ingesting, and exporting data
Custom UI development in React to embed Annotations tools
Coordinate new feature development and solution solve alongside product core team
Set best practices in software development
Set a standard of engineering leadership for junior colleagues

Requirements:

10+ years shipping production software
Expert competency in Python
Expert competency in React
Command Line competency (Shell / Bash / Zsh)
Pragmatic approach to software development
Mix of individual contributor ownership and leading others on technical problem solving

Nice to have:

Knowledge of Data Science and GPU model training
Consulting background from a major consulting firm

What we offer:

Bonuses and equity are included in offers above entry level

Additional Information:

Job Posted:
December 09, 2025

Employment Type:

Fulltime

Work Type:

Hybrid work

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Principal Software Engineer