AI Engineer | Mid-senior

Nexos

Warsaw Remote permanent

Posted: May 11, 2026

Quick Summary

We're looking for a Mid-senior AI Engineer to lead AI/ML innovations and contribute to the development of our all-in-one AI platform. The ideal candidate will have a strong background in AI and ML, with experience in leading AI/ML projects and contributing to the development of new AI concepts and frameworks.

Job Description

Join the AI revolution. We’re building an all-in-one AI platform to help teams do their best work and automate every routine task you can think of. We’re looking for problem-solvers to turn powerful AI into an easy, no-code tool for teams everywhere.

Main Responsibilities :
• Lead AI/ML innovations - from coming up with ideas for research, POCs, to contributing to full product feature build out.

• Act as GenAI expert - live and breathe AI field news and trends.

• Hands-on work trying out new concepts, AI frameworks and tooling around them for different use cases - context management, memory, retrieval, agentic loop, A2A and many other solutions.

• Be part of product development - from discovery together with PMs to delivery within cross-functional teams.

• Evaluate new LLMs (proprietary and OSS), and assess for performance, cost, and other metrics.

• Bonus: act as AI evangelist to promote the adoption and understanding of AI both within and outside nexos.ai.

Core Requirements:
• Strong record of work on AI/ML projects in production.

• Professional expertise in building Python applications; designing, executing, and maintaining AI systems.

• Good understanding of different AI developer frameworks and tooling.

• Background in proprietary or open-source LLM usage for text, embeddings or multi-modal use cases.

• Expertise in prompt engineering and evaluation techniques.

• Sense of ownership and accountability, capable of planning your work effectively.

• Get Things Done attitude, mixed with a creative approach when needed.

Bonus Point For :
• Experience building complex Agentic systems and tools powering them.

• Deep expertise in data science methodologies, ML algorithms, and NLP techniques.

What We Offer

• Professional growth. Internal and external events, online training, conferences, books - everything you need to reach full potential.
• Health benefits. Private health insurance, online and on-site workouts, consultations to feel and be your best.
• Team spirit. Team buildings and parties with games, shows, tastings, food coupons, gifts, and it’s on us.
• More free time. Stay with us and additional vacation days will be added to your calendar.
• Additional paid leave. Additional days are covered by us in cases of illness or special occasions.
• Flexibility. Flexible working time arrangement.

View our guidelines for AI usage during hiring process: AI guidelines

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