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Member of Technical Staff, Machine Learning

bjakcareerPolandActAI Engineering
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Salary
Not listed
Job type
Full-time
Work mode
Remote
Posted
28 Sept 2026
Status
Open · checked 7d ago

About this role

This role suits engineers who want to develop strong systems judgment by shipping, debugging, and iterating on real-world machine learning. The position is based in Poland at bjakcareer and involves building core machine learning components for production systems.

Role Overview

The Member of Technical Staff, Machine Learning position at bjakcareer in Poland focuses on building core machine learning components. Staff members work on real production systems from day one and learn how large-scale machine learning behaves outside of research settings.

Key Responsibilities

Build and improve machine learning components across data, training, evaluation, and inference.
Fine-tune and adapt models as part of larger production systems.
Implement evaluation and testing to understand model behavior.
Help build and maintain data pipelines for real-world and synthetic data.
Debug model issues, performance problems, and production incidents.
Ship improvements iteratively and learn from real user feedback.
Work closely with senior machine learning engineers and product teams.
Work under real production constraints including latency, cost, reliability, and safety.

Requirements

Strong foundations in machine learning and modern neural architectures.
Some hands-on experience training, fine-tuning, or deploying machine learning models.
Comfortable writing production-quality code and learning new tools quickly.
Curious, coachable, and eager to learn from real systems in production.
Ability to work through ambiguity with guidance and grow ownership over time.
Bias toward shipping, iteration, and continuous improvement.

Skills and Tools

Python
PyTorch
JAX
Production machine learning systems running on GPUs

About the Company

ACTAI builds proactive applications for users globally who are not accustomed to complex prompting, with the mission of bringing intelligence to conversations, errands, organization, and workflows with minimal to no prompting. The company focuses on achieving high reliability for long-running workflows, persistent context, and real-world task completion while reducing hallucinations. The team operates as a small, hands-on unit with high talent density that makes decisions collectively and moves at rapid speed.

How to Apply

Interested candidates should apply on the official company careers page.

Skills and tech stack

Questions candidates ask

Where is the Member of Technical Staff, Machine Learning role located?

The job is located in Poland.

What technologies and tools are used in this role?

The tech stack includes Python, PyTorch, JAX, and production machine learning systems running on GPUs.

What kind of experience is required for the position?

Candidates need strong foundations in machine learning and modern neural architectures, some hands-on experience training, fine-tuning, or deploying models, and comfort with writing production-quality code.

What does the interview process look like?

The interview process consists of 3 to 4 virtual or onsite interviews conducted by technical team members, with prompt decisions communicated afterward.

Ready to apply?

The application is on the official bjakcareer careers page.

Apply on company site