AI Engineer

Mars Athletic Club; Beşiktaş; On-site; TRY 600,000 - 900,000; Full time

Job summary

Mars Athletic Club is hiring an AI Engineer to join the Technology team at our Ortaköy, Istanbul headquarters. You will design and deploy LLM-powered products, build RAG pipelines, and develop AI agents for data exploration and automation.

Ideal candidates have 4+ years in Data Science or ML, strong Python/SQL skills, and experience with GCP tools like BigQuery, Vertex AI and Cloud Run. A growth mindset and cross-functional collaboration are essential.

Qualifications

• Bachelor’s degree in Computer Science, Engineering, Data Science or related field; Master’s preferred.
• At least 4 years of experience in Data Science, ML Engineering or related field.
• Proven experience deploying LLM-based applications into production.
• Hands-on with RAG, prompt engineering, chatbots and agentic workflows.
• Strong proficiency in Python and SQL; data pipelines, feature engineering and monitoring.

Responsibilities

• Design and develop LLM-powered products aligned with MAC’s needs.
• Build RAG pipelines, conversational assistants and chatbot solutions.
• Develop AI agents for data exploration, automation, modeling and reporting.
• Own end-to-end deployment, serving and monitoring of ML models and LLM apps.
• Monitor and optimize cloud infrastructure and LLM costs.
• Collaborate with Data Engineering on datamarts, feature stores and data assets.
• Develop predictive models for personalization, churn prevention and campaign optimization.
• Run A/B tests and offline/online evaluation for ML models and outputs.
• Communicate findings clearly to stakeholders and stay updated on AI tech.

Skills

LLM deployment

RAG pipelines

Python

SQL

MLOps

GCP (BigQuery, Vertex AI, Cloud Run)

LangChain / LlamaIndex

Vector databases

Data pipelines

English/Turkish bilingual

Education

Bachelor's in CS/Engineering/Data Science

Tools

BigQuery

Vertex AI

Cloud Run

LangChain

LlamaIndex

Job description

As Turkiye's largest fitness community with our MAC/One, MACFit, MAC Studio and NuSpa brands, we are looking for an AI Engineer to join our Technology team at our headquarters in Ortaköy, Istanbul.

Being part of MAC means joining a community that continuously evolves, improves and moves towards a better life. Here, ideas matter, collaboration is encouraged, and feeling good is just as important as working effectively.

If you are excited about using AI technologies to shape the future of fitness experiences and want to be part of MAC’s technology transformation, we would love to hear from you.

What We’re Looking For

• Bachelor’s degree in Computer Science, Engineering, Data Science or a related field; a Master’s degree is preferred,
• At least 4 years of experience in Data Science, Machine Learning Engineering, Applied AI or a related field,
• Proven experience developing and deploying LLM-based applications into production,
• Hands-on experience with RAG, prompt engineering, chatbots and agentic workflows,
• Strong proficiency in Python and SQL,
• Solid understanding of data pipelines, feature engineering, model deployment and monitoring,
• Experience with MLOps practices and processes,
• Experience with GCP technologies, particularly BigQuery, Vertex AI and Cloud Run,
• Experience with LangChain, LlamaIndex or similar LLM orchestration frameworks,
• Knowledge of vector databases and retrieval systems,
• Experience in predictive modeling; experience with recommendation systems, forecasting or segmentation is a plus,
• Understanding of cloud infrastructure and FinOps / cost-aware AI practices,
• Experience working with datamarts, event-level data and feature engineering processes,
• Experience with GA4, event-based product analytics and/or omni-channel engagement tools,
• Strong communication skills in both English and Turkish,
• Strong analytical thinking and problem-solving skills,
• A product and growth mindset,
• Ability to communicate technical concepts and findings clearly to non-technical stakeholders,
• Strong collaboration and teamwork skills.

What You’ll Do

• Design and develop LLM-powered products and solutions aligned with MAC’s business and product needs,
• Build RAG pipelines, conversational assistants and chatbot solutions,
• Develop and orchestrate AI agents for data exploration, automation, modeling and reporting use cases,
• Own the end-to-end deployment, serving and monitoring processes of ML models and LLM applications in production,
• Monitor and optimize cloud infrastructure and LLM inference costs,
• Collaborate with Data Engineering teams on the development of datamarts, feature stores and data assets,
• Develop predictive models for use cases such as personalization, churn prevention and campaign optimization,
• Design and run A/B testing as well as offline and online evaluation processes for ML models and LLM outputs,
• Analyze member and behavioral data to develop AI solutions that create measurable value for products and business processes,
• Monitor the performance, accuracy, reliability and scalability of AI systems,
• Integrate AI solutions with MAC’s existing product and technology ecosystem,
• Communicate technical findings, system behavior and results clearly to relevant stakeholders,
• Stay up to date with developments in AI and data technologies and contribute to building MAC’s AI capabilities,
• Identify and implement new AI use cases that improve the effectiveness and efficiency of business processes.

Nice to Have

• Experience with fine-tuning and embedding models,
• Experience developing AI solutions in fitness, wellbeing, retail, consumer-facing or other high-volume data environments.