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 3 days ago
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