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Senior Machine Learning Engineer

bjakcareerZurich, SwitzerlandActAI Engineering
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Salary
Not listed
Job type
Full-time
Work mode
Remote
Experience
Senior
Posted
28 Sept 2026
Status
Open · checked 7d ago

About this role

This Senior Machine Learning Engineer position at bjakcareer in Zurich suits experienced practitioners who want to independently own production-grade machine learning subsystems for proactive AI applications. The role focuses on developing reliable AI tools that help users manage everyday workflows with minimal prompting.

Role Overview

ACTAI seeks a Senior Member of Technical Staff in Machine Learning to independently manage critical machine learning subsystems in production. This hands-on position involves solving ambiguous problems, designing practical architectures, and shipping scalable systems while operating within real-world constraints such as cost, latency, reliability, and safety.

Key Responsibilities

Build core machine learning systems that support a proactive artificial intelligence product operating over long horizons.
Manage the complete lifecycle of machine learning work including data preparation, training, evaluation, inference, and continuous iteration.
Convert research concepts into functioning production systems and debug model failures using production telemetry.
Collaborate alongside research, product, and engineering colleagues to deliver practical value to users.
Guide and mentor other machine learning engineers by demonstrating strong technical judgment.

Requirements

Experience building and deploying machine learning systems utilized by real users.
Deep understanding of how modern machine learning models perform and fail in production environments.
Ability to write production-quality code and design robust systems rather than simple scripts.
Demonstrated capability to work independently, take complete ownership, and communicate clearly.

Skills and Tools

Python
PyTorch
JAX
GPU-based training and inference systems

About the Company

ACTAI develops proactive applications designed to bring intelligence to everyday tasks like communication, organization, and workflows without requiring complex user prompting. The organization focuses on reliability, persistent context, and long-running workflows to reduce model hallucinations and help users reclaim valuable time.

How to Apply

Interested candidates should submit their application directly through the official company careers page.

Skills and tech stack

Questions candidates ask

Where is the job located?

The position is located in Zurich, Switzerland.

What technologies and tools are used in this role?

The tech stack includes Python, PyTorch, JAX, and GPU-based training and inference systems.

What is the interview process like?

The evaluation process consists of three to four interviews conducted via virtual meetings or onsite visits, handled by technical team members.

What are the core responsibilities regarding team collaboration?

The role requires collaborating closely with research, product, and engineering teams, as well as mentoring and reviewing work from other machine learning engineers.

Ready to apply?

The application is on the official bjakcareer careers page.

Apply on company site