Middle AI Engineer

About the company:
Paynet specializes in B2B and B2C technology projectsin the financial services (Fintech) sector, such as electronic payment processing, customer loyalty management systems, e-money services, and online payment acceptance solutions.
Our core values are innovation, quality, and customer satisfaction. We strive to deliver the best solutions and services, continuously seek new growth opportunities, and stay up to date with the latest trends and technologies in the industry.

Role Summary:
We are looking for a hands-on AI Engineer to design and implement production-ready systems powered by large language models (LLMs). The ideal candidate will have experience with backend development and integrating AI capabilities directly into business workflows.

Responsibilities:

• Develop and deploy LLM-based features (classification, summarization, semantic search, chat);
• Prototype and validate models locally using Ollama;
• Build embedding-based search and similarity systems;
• Design multi-step interaction flows using Model Context Protocol (MCP);
• Use toolcalling to enable LLMs to interact with APIs, databases, and external services;
• Develop scalable backend services using Python and FastAPI;
• Store and manage structured data with SQLor PostgreSQL;
• Implement caching and fast-access layers using Redis;
• Ensure all systems meet performance, security, and maintainability standards.

Tech Stack (Required):

• Python;
• FastAPI;
• SQL / PostgreSQL;
• Redis;
• LLM;
• Embedding models;
• Ollama;
• MCP (Model Context Protocol);
• Toolcalling.

Requirements:

• Proven experience with LLM integration and backend development;
• Strong command of Python and API development best practices;
• Ability to ship working systems, not just prototypes;
• Proficiency in Russian (required) and English (B1 or above).

We offer:

• Participation in exciting and large-scale projects;
• Challenging and engaging tasks that help develop your skills;
• Competitive salary, reviewed annually, along with a full social package;
• Comfortable work environment with an excellent work-life balance;
• Stable work schedule (Monday - Friday, 09:00-18:00), with a one-hour lunch break;
• Free English language courses;
• Opportunities for personal and professional development, including additional courses;
• Team-building activities, corporate gifts, and bonuses for special occasions (e.g., birthday, childbirth);
• Cozy office located near Valea Trandafirilor Park, at Decebal 6 (Botanica);
• Coffee and snacks at the office to keep you energized and in a good mood.

You will join a team focused on delivering AI-driven systems with measurable impact. This role is for engineers who build real things, not just models.

To apply for this job, candidates should send their CV to hr.office@paynet.md with subject line: „Middle AI Engineer”.

Selected candidates will be invited for an interview.