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Bluebird Linkedin · Posted 1mo ago

Machine Learning Engineer

Budapest

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Indexed description

We are currently looking for a Senior Applied ML Engineer on behalf of one of our partner companies.

Our partner is an innovation-driven company building and deploying AI solutions across Space, Manufacturing, AdTech, and FinTech. They combine state-of-the-art research with robust engineering to solve real-world problems at production scale.


Tasks

  • As a Senior Applied ML Engineer, you will lead modeling and deployment for reinforcement learning/decision optimization, recommender systems, and computer vision. You’ll take systems from prototype to production—owning training, evaluation, deployment, and monitoring—while partnering with engineering and product to deliver measurable impact.
  • Reinforcement learning / decision optimization
  • Design environments and reward functions; build training and evaluation pipelines.
  • Deploy policies safely with offline evaluation, guardrails, and gradual rollout strategies.
  • Recommender systems
  • Build candidate generation + ranking stacks (hybrid approaches, deep ranking, transformer-based recommenders where appropriate).
  • Implement experimentation frameworks and measure impact with strong statistical discipline.
  • Computer vision
  • Develop CV pipelines (classification/detection/segmentation) with strong data strategy and metric-driven iteration.
  • Optimize for real-world constraints (latency, throughput, accuracy, robustness).
  • Productionization
  • Package and deploy models as services; implement monitoring for performance, drift, and data quality.
  • Collaborate with data/platform teams on reliable pipelines, feature computation, and scalable serving.
  • Mentorship & technical leadership
  • Raise engineering standards, review designs, and mentor team members.


Requirements

  • 5+ years applied ML/ML engineering; 2+ years at senior/lead level.
  • Strong PyTorch (preferred) or TensorFlow; ability to debug deep learning training and inference.
  • Demonstrated experience in at least one of the following, with production ownership:
  • Reinforcement learning / contextual bandits / sequential decisioning
  • Recommender systems (ranking, retrieval, hybrid signals, evaluation)
  • Computer vision (end-to-end training + deployment)
  • Solid ML evaluation skills: offline metrics, online experimentation, bias/variance tradeoffs.
  • Production engineering basics: containers, CI/CD, monitoring/alerting, model/version management.
  • Strong understanding of algorithms, data structures, and performance optimization.
  • Preferred / Nice-to-Have
  • Distributed compute for ML: Ray, Spark, or similar large-scale processing/training.
  • Advanced RL: multi-agent RL, distributed RL, offline RL, safe RL deployment patterns.
  • Specialized recommender experience: two-tower retrieval, transformer recommenders, real-time ranking.
  • CV at scale: efficient training, augmentation strategy, edge/real-time inference optimization.
  • Feature stores, streaming/event-driven ML pipelines, and near-real-time decisioning.
  • Strong SRE mindset for ML services (SLOs, dashboards, incident playbooks).


What we offer

  • exciting, diverse AI projects
  • end-to-end project responsibilities
  • competitive salary
  • opportunity to deepen professional knowledge across multiple domains (DL, LLM, CV)
  • flexible, fully remote work opportunity


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