Senior Machine Learning Engineer
Bjak · Remote · Spain ·
COMPENSATION
€•• – ••k
Listed on the employer's job board (Ashby)
- Senior ML Engineer
- Fully remote
- Python + PyTorch/JAX
- Production-focused
- High-impact role
Actai aims to replace basic productivity tools with proactive, AI-native applications that require minimal prompting. The team focuses on high reliability for long-running workflows, persistent context, and real-world task completion to reduce hallucinations.
As a Senior Member of Technical Staff, you will independently own critical ML subsystems. You will design practical solutions for ambiguous problems and ship systems that operate reliably at scale, turning research ideas into robust production features.
What you'll do
- Build core ML systems for proactive, long-horizon AI products
- Own the full lifecycle from data preparation to inference
- Convert research concepts into reliable production systems
- Debug model failures using real production signals
- Iterate quickly by shipping, measuring, and refining outcomes
- Mentor other ML engineers through technical judgment
- Optimize for latency, cost, reliability, and safety constraints
What you'll need
- Proven experience shipping ML systems used by real users
- Deep understanding of modern ML model behavior in production
- Ability to write strong, production-quality code
- Systems thinking approach rather than scripting mindset
- Capacity to work independently and drive projects to completion
- Strong communication skills and ability to learn fast
Stack
- Python
- PyTorch
- JAX
- GPU-based training systems
- Inference systems
How you'll work
- Small, high talent-density team
- Collective decision-making process
- Rapid speed with focus on quality
- Virtual meetings for interviews
Hiring process
- Technical team evaluates applications
- Three to four interviews maximum
- Interviews conducted via virtual meetings or onsite
- Prompt decision following final interview