Senior AI/ML Engineer

Job Description

We're looking for an AI/ML Engineer to design, build, and deploy machine learning systems and intelligent agentic solutions that solve real business problems. This role is centered on agentic AI - building LLM-powered systems that can reason, plan, and autonomously take action across multiple AI platforms and ecosystems - combined with classic ML engineering across the full lifecycle, from data pipelines and model development to production deployment. You'll work closely with our AI Platform Architect to align implementation with technical strategy and architecture standards, and partner directly with business stakeholders to ensure the solutions you build translate into real operational impact.

Key Responsibilities

Agentic AI & LLM Systems (Core Focus)

Design and build agentic workflows that use LLMs to plan, reason, and execute multi-step tasks autonomously

Build and deploy agentic solutions across multiple AI platforms and ecosystems (e.g., Azure AI Foundry, Google Cloud Vertex AI / Gemini, Anthropic Claude), selecting the right platform and tools for the use case

Develop tool-use and function-calling integrations, connecting agents to APIs, databases, and internal systems

Implement orchestration patterns (e.g., planner-executor, multi-agent collaboration, ReAct-style reasoning loops) for complex task automation

Build retrieval-augmented generation (RAG) pipelines to ground agent outputs in proprietary or real-time data

Establish guardrails, evaluation harnesses, and monitoring for agent reliability, safety, and task success rates

Prototype and iterate quickly on agent behaviors using frameworks such as LangGraph, LlamaIndex, CrewAI, or custom orchestration layers

Design agentic workflows that consume structured outputs from perception/detection models (e.g., computer vision systems) to trigger downstream actions such as alerts, corrective tasks, or automated reports

Model Development & MLOps

Design, train, fine-tune, and evaluate machine learning and deep learning models for production use cases, including computer vision / object detection models for image-based recognition and classification tasks

Build and maintain scalable data pipelines for training, validation, and inference

Implement MLOps best practices: CI/CD for models, versioning, monitoring, and automated retraining

Optimize model performance, latency, and cost across training and inference workloads, including for on-device or edge/mobile deployment scenarios

Design pipelines to compare model-detected states against a source-of-truth dataset and flag discrepancies, feeding results into downstream automation

Continuously improve model accuracy using field/production feedback, labeled data pipelines, and active learning loops

Applied Engineering

Collaborate with product and design teams to translate business requirements into AI-powered features

Integrate ML models and agents into production applications via robust, well-tested APIs

Write clean, maintainable, well-documented code and contribute to internal tooling/libraries

Conduct A/B tests and offline/online evaluations to measure model and agent impact

Collaboration & Communication

Work closely with the AI Platform Architect to ensure solutions align with overall AI architecture, technical standards, and long-term platform strategy

Partner directly with business stakeholders to understand operational needs, define success metrics, and ensure delivered solutions drive measurable business value

Partner with data engineers, product managers, and domain experts to define success metrics

Communicate technical trade-offs and results clearly to both technical and non-technical stakeholders

Stay current with emerging research in ML, LLMs, and agentic architectures, and evaluate their applicability

Required Qualifications

Bachelor's or master's degree in computer science, Machine Learning, or related field (or equivalent experience)

5+ years of experience building and deploying ML models in production

Strong programming skills in Python; familiarity with ML frameworks (PyTorch, TensorFlow, scikit-learn)

Hands-on experience building and deploying agents on at least one major AI platform (e.g., Azure AI Foundry, Google Vertex AI / Gemini, Anthropic Claude), with strong interst in working across multiple

Experience with LLM APIs and prompt engineering across providers (OpenAI, Anthropic, Google)

Familiarity with vector databases and RAG architectures (e.g., Pinecone, Weaviate, Chroma)

Experience with computer vision or image recognition models in a production setting

Solid understanding of software engineering fundamentals: version control, testing, API design

Experience with cloud platforms (AWS, GCP, or Azure)

Preferred Qualifications

Experience building agents on Azure AI Foundry (Agent Service) and/or Google Vertex AI Agent Builder

Familiarity with cross-platform agent portability - adapting the same agent logic/tooling across different model providers and orchestration layers

Experience with multi-agent orchestration frameworks (LangGraph, AutoGen, CrewAI)

Experience designing agentic systems that combine perception (vision/detection) outputs with reasoning/action layers

Background in reinforcement learning or fine-tuning LLMs (LoRA, RLHF)

Experience with containerization and orchestration (Docker, Kubernetes)

Contributions to open-source ML/AI projects

Familiarity with evaluation frameworks for LLM/agent outputs

Experience optimizing models for on-device or edge deployment (e.g., mobile/tablet applications)

What do we offer?

• •Contract of employment
• •Annual bonus
• •Private medical care
• •Cafeteria Platform/Multisport
• •English lessons subsidized by the company
• •Group insurance
• •Two additional days off (Good Friday, Friday after Corpus Christi) – with the possibility of exchanging for other holidays
• •Employee Referral Bonus Program
• •Attractive discounts for products and services at our stations
• •Employee stock purchase plan
• •Employee Assistance Program (Lyra)
• •Modern and convenient office that you can virtually visit here - https://goo.gl/maps/CLteHfYcdYMbdESq6
• •Trainings & possibility to develop skills in a wide international environment

Want to know even more about us? Take a look at our career page: https://workwithus.circlek.com/global/en/businesscentrewarsaw

Interested?

We encourage you to apply.

We know great companies are built from within, by great people like you. Come grow with us! We´re looking forward to your application.

When working with us you can depend upon it that you will not be judged on the grounds of race, national origin, gender, sexual orientation, disability, age, or other legally protected status. Oppositely – we believe that our diverse and inclusive culture helps us create an amazing atmosphere where everybody feels welcome.

Check who we are here: https://youtu.be/td-QGnNnvW0

We hereby inform that in the company Circle K Business Centre Poland sp. z o.o. with registered office in Warsaw an Internal Notification and Follow-up Actions Procedures applies. The document describes rules for reporting violations of law by whistleblowers. Full content of the above-mentioned Procedure is available here: https://www.circlek.pl/o-nas/procedury-zgloszen