callstackpl
callstackpl~13h ago
New

Senior AI System Engineer

PolandPoland·Wrocławsenior
OtherSystem Engineer
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Quick Summary

Overview

Callstack was founded in 2016 by Mike Grabowski and Anna Lankauf. Our company provides top cross-platform consultancy & development in React.js and React Native.

Technical Tools
OtherSystem Engineer

  • You will work with the best React Native experts on applications used by millions worldwide.

  • You have a possibility to contribute to our projects in Open Source like React Native Paper, Linaria, RN Testing Library etc.

  • There are plenty of possibilities to showcase your expertise: You can speak at our conference, be featured in our blog, or React Universe On Air episode.

  • You are the one to decide in which area you want to grow, you’ll have an individual self-development budget to upgrade your soft skills, managing skills or become a Mentor in the future.

  • 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

  • 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 :) 

What We Offer

~1 min read
Work on software used by millions
Take part in our Open Source projects
Grow in your unique expert role
Code with the top experts and community leaders
Showcase your expertise by speaking at our conference, being featured in our blog or podcast episode
Co-create and shape core technology
Join the React Native community
Develop soft skills
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

Location & Eligibility

Where is the job
Wrocław, Poland
On-site at the office
Who can apply
Open to applicants worldwide

Listing Details

First seen
June 16, 2026
Last seen
June 16, 2026

Posting Health

Days active
0
Repost count
0
Trust Level
51%
Scored at
June 16, 2026

Signal breakdown

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callstackplSenior AI System Engineer