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Senior AI System Engineer

Full-time

Callstack

Role Description

As a Senior AI System Engineer you will:

  • Act as a trusted AI architect & consultant for our enterprise clients, helping them turn ambitious ideas into robust, production-ready solutions across cloud, edge, and on-prem environments.
  • Design and own end-to-end LLM & multi-agent architectures - from vector-based RAG pipelines and document-processing workflows to multi-agent orchestration and autonomous decision frameworks.
  • Create and publish libraries utilizing local on-device models.
  • Create and publish design papers on behalf of the company together with our R&D team.
  • Build cloud-native AI infrastructure on AWS or equivalent on Cloudflare / GCP with security, governance, and cost optimization baked in.
  • Define and implement AI governance & monitoring (bias detection, drift tracking, compliance reporting) to keep models accurate, explainable, and audit-ready.
  • Evaluate, benchmark, and create custom models - open-source and commercial.
  • Contribute to the open-source community through internal R&D initiatives.
  • Stay one step ahead by experimenting with the “next big thing” in AI.
  • Mentor and inspire engineers around you, sharing knowledge through tech talks, code reviews, and architectural workshops.

Qualifications

  • A seasoned AI/ML engineer with proven track record designing and shipping production AI systems (LLMs, NLP, computer vision, or multi-modal).
  • Have 7+ years of experience in Software Engineering.
  • Bachelor's Degree, Master's Degree or Ph. D in Computer Science, Data Science, Artificial Intelligence, or a related field.
  • Fluent in Python and comfortable with TypeScript.
  • Skilled at vector search & RAG pipelines and understand embedding selection, chunking, and retrieval tuning.
  • Comfortable designing multi-agent orchestration.
  • Understand AI governance, security, and MLOps.
  • Data-driven - you benchmark, profile, and optimize everything from prompt tokens to GPU utilization.
  • Open-source minded - public GitHub contributions, conference talks, or community forum activity are huge pluses.
  • Fluent communicator in English (min. B2+), able to explain complex concepts to technical and non-technical stakeholders.
  • Proactive, self-driven, and a team player who loves sharing knowledge and elevating those around you.
  • Fun to work with :)

Benefits

  • 24 paid days off & 30 days paid sick leave for B2B contractors.
  • Fully-covered life insurance.
  • Private healthcare for you and your family.
  • Free access to mental health platform - Helping Hand.
  • Multisport Card or monthly allowance for other sports activities.
  • Individual Wellbeing & Development Budget.
  • Monthly lunch allowance.
  • Accounting costs refund for B2B contractors.
  • Flexible working hours and fully remote work possibility.
  • Cool office in Wrocław city center.
  • Magnificent team events and activities.
  • Company-wide workation and team building workshops.
  • Top-notch hardware - Apple devices.
Vacancy posted a month ago
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