Senior ML Engineer

Cogita; Town of Poland (NY); On-site; USD 76,744 - 107,442; Full time

Benefits offered by this job

Attractive compensation

International enterprise projects

Engaged team with a strong engineering culture

Long-term cooperation

Attractive ESOP

Job summary

Cogita is seeking a Senior ML Engineer in Warsaw, Poland, to build production-grade AI systems and scalable solutions for enterprise clients. You will design and implement AI systems, integrating machine learning solutions, and work on various projects involving advanced prompt engineering and MLOps pipelines.

Requirements include at least 5 years of experience in Machine Learning, strong software engineering skills, and a record of deploying ML systems. The role offers competitive compensation between 25,000–35,000 PLN/month and opportunities for long-term collaboration.

Qualifications

• At least 5 years of hands-on experience in Machine Learning or applied AI.
• Proven experience deploying ML/AI systems to production.
• Participation in at least 3 projects involving Large Language Models (LLMs).
• Strong software engineering mindset and experience working with real-world data.
• Ability to work independently and take ownership of complex technical challenges.

Responsibilities

• Developing agent-based AI systems for complex, real-world use cases.
• Integrating ML solutions with analytical platforms and clients' internal APIs.
• Experimenting with ML and LLM models, including tuning and benchmarking.
• Designing and deploying RAG pipelines tailored to enterprise data.
• Co-creating analytical and decision-support tools that automate business processes.

Skills

Machine Learning

Software Engineering

Large Language Models (LLMs)

Job description

Build production‑grade AI systems - from MVP to large‑scale deployment

We are looking for a Senior ML Engineer who wants to build real‑world AI systems - from early prototypes to scalable, production‑ready solutions used by thousands of users.

At COGITA, you will work on ambitious AI projects for enterprise clients, combining applied research with robust engineering and real business impact.

Your Role

As a Senior ML Engineer, you will play a key role in designing, building, and scaling AI systems. Your responsibilities will include:

• Developing agent‑based AI systems for complex, real‑world use cases
• Integrating ML solutions with analytical platforms and clients’ internal APIs
• Experimenting with ML and LLM models, including tuning, benchmarking, quality evaluation, and hallucination reduction
• Designing and deploying RAG pipelines tailored to enterprise data and workflows
• Co‑creating analytical and decision‑support tools that automate and improve business processes

You will work closely with other senior engineers, researchers, and project leads, taking ownership of both technical quality and delivery.

How We Work

At COGITA, we focus on long‑term collaboration and continuous growth. We carefully select projects to ensure they are technically challenging, meaningful, and aligned with the development goals of our team.

Our project portfolio is broad, but always AI‑focused. In one project, you may work on advanced prompt engineering and LLM‑based systems; in another, you may design MLOps pipelines for real‑time, mission‑critical environments.

This variety allows you to grow across multiple dimensions of modern AI engineering.

Requirements

• At least 5 years of hands‑on experience in Machine Learning or applied AI
• Proven experience deploying ML/AI systems to production
• Participation in at least 3 projects involving Large Language Models (LLMs)
• Strong software engineering mindset and experience working with real‑world data
• Ability to work independently and take ownership of complex technical challenges

What We Offer

• Attractive compensation: 25,000–35,000 PLN/month + VAT (B2B), depending on experience
• International enterprise projects
• An engaged team with a strong engineering culture
• Long‑term cooperation and real influence on technical decisions
• Attractive ESOP – a meaningful equity participation program for long‑term contributors who want to grow with the company and share in its success

If you want to build AI systems that go beyond demos – and work with a team that values responsibility, clarity, and real impact – we’d be happy to talk.

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