Job Overview
Location
European Union
Job Type
Full-time
Category
Machine Learning Engineer
Date Posted
April 21, 2026
Full Job Description
đź“‹ Description
- • Senior Machine Learning Engineer role in the AI Enabler team at Cast AI, focused on building autonomous infrastructure that optimizes AI workloads in Kubernetes and cloud environments by automatically selecting cost-efficient, high-performing LLMs and reducing infrastructure waste.
- • Day-to-day responsibilities include evaluating and analyzing LLM performance, architecting and building inference and training pipelines, staying current with industry trends, and collaborating across teams to design end-to-end solutions for AI infrastructure automation using Python, vLLM, SGLang, TensorRT, ClickHouse, PostgreSQL, GCP Pub/Sub, gRPC, REST, Kubernetes, and multi-cloud platforms (AWS, GCP, Azure).
- • Cast AI is a global automation platform headquartered in Miami with teams across 34 countries, serving over 2,100 enterprise clients including Akamai, BMW, Cisco, and HuggingFace; the company achieved unicorn status in January 2026 with a $1B+ valuation backed by Shinsegae Group’s venture arm.
- • The role offers the opportunity to impact a technical greenfield project, drive innovation in AI infrastructure optimization, and grow expertise in ML inference optimization, distributed systems, and cloud-native technologies while working in a flexible, remote-first environment across European time zones (GMT 0 to GMT +3).
🎯 Requirements
- • 5+ years of hands-on experience in Data Science and Machine Learning with a proven track record and robust project portfolio
- • Strong software engineering skills in Python
- • Expertise in ML inference optimizations including reducing initialization time/memory, weight quantization, and tuning inference engines (vLLM, SGLang, TensorRT)
- • Knowledge of network optimization for distributed ML training and inference
- • Understanding of distributed training patterns and checkpointing strategies
- • Must be physically located in any European country within GMT 0 to GMT +3 time zones
- • Strong English skills with excellent verbal and written communication abilities
- • Ability to work independently and collaborate effectively in a team setting
🏖️ Benefits
- • Competitive salary range of €6,500 to €9,000 gross per month based on experience
- • Flexible, remote-first global work environment
- • Equity options as part of compensation package
- • Private health insurance coverage
- • Learning budget for professional development including access to international conferences and courses
- • 10% of work time allocated for personal projects or self-improvement
- • Annual hackathon to foster innovation and team bonding
- • Team-building budget and company events to strengthen colleague connections
- • Equipment budget to ensure access to necessary tools
- • Extra days off to support work-life balance
Skills & Technologies
About Castai Group Inc.
Castai Group Inc. provides specialized investment and strategic advisory services to middle-market companies across North America. The firm focuses on mergers and acquisitions, private placements, restructuring, and growth capital transactions for businesses in manufacturing, consumer goods, and business services sectors. Headquartered in New York, Castai operates a lean, senior-led model that emphasizes direct principal involvement, rigorous financial analysis, and long-term client partnerships. Its principals have executed more than 200 transactions totaling over $10 billion in aggregate value since inception.
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