LLM Developer

4 days ago

Belgrade, Central Serbia Smartbrain Full time €60,000 - €80,000 per year

Our client is an AI-driven platform that optimizes workforce strategies. Their solution matches specialists with vacancies and supports hiring processes from search to interviews using AI, NLP/LLM chatbots, and other advanced ML solutions.

About the Role:

As a Python Backend Engineer, you will work on the client's LLM-based AI solutions, building and maintaining APIs, implementing Retrieval-Augmented Generation (RAG), and ensuring seamless integration of AI models with their platform.

Work Format:

Fully remote

Full-time, C2C

Europe timezone

Hourly rate: $30–40 gross

Responsibilities:

  • Integrate AI models with APIs, databases, and business applications
  • Implement RAG pipelines and vector search solutions
  • Work with SQL databases (PostgreSQL) to store and manage AI-related data
  • Implement caching strategies and load balancing for efficient AI request handling
  • Write clean, maintainable code following SOLID principles, tests, and code reviews
  • Collaborate with product analysts, designers, customer success, and other developers
  • Participate in Agile/SCRUM development processes

Requirements:

  • Bachelor's degree in Computer Science or equivalent experience
  • Python 5+ years, with experience in backend frameworks (FastAPI)
  • Experience with LLM APIs (e.g., OpenAI, Mistral)
  • Knowledge of Retrieval-Augmented Generation (RAG) and vector databases (e.g., OpenSearch)
  • Experience with cloud platforms (AWS) and containerization (Docker)
  • Proficiency in database management (SQLAlchemy, PostgreSQL)
  • Experience with LangChain for prompt chaining, memory handling, and tool integrations
  • Experience designing and optimizing AI prompts
  • Strong English communication skills
  • Passion for experimenting with the latest AI advancements

Nice-to-Have:

  • Fine-tuning LLMs
  • AI agents and autonomous workflows
  • Microservices architecture
  • Message queues (RabbitMQ)
  • Redis for caching and session management

Feel free to contact me on
LinkedIn
or via email at

for any inquiries or further discussions about the role.

We encourage candidates to apply even if they don't meet all requirements. Continuous learning and equal opportunities are important to us. If you're passionate about this role, we'd love to hear from you. Apply with your resume today

  • Applied AI Research Lead

    1 week ago

    Belgrade, Central Serbia Toloka Full time €40,000 - €80,000 per year

    Company IntroAtToloka AIwe create data that powers leading GenAI models and innovations. We work with frontier labs, big tech, renowned AI startups, enterprises and non-profit research organizations worldwide. We use a combination of Experts + Crowd + Tech Platform to teach AI models to reason and evaluate their efficacy and safety. We have experts in more...

  • Backend Developer Junior

    1 week ago

    Belgrade, Central Serbia Red Black Tree Full time €25,000 - €40,000 per year

    Red Black Tree is a Serbia-based software development company with over 10 years of experience, delivering custom software solutions to clients across the EU and the USA.We specialize in end-to-end software development, covering every phase of a project—from concept and architecture to development, testing, maintenance, and IT consulting. Our solutions are...

  • Generative AI Engineer

    6 days ago

    Belgrade, Central Serbia Akvelon, Inc. Full time $90,000 - $120,000 per year

    We are looking for anAI/ML Engineerto join a dynamic team working across multiple legal-focused AI initiatives. Instead of a long-term assignment on a single product, you'll contribute to a variety of related and evolving projects — some starting from scratch, others already in production.Currently, the most urgent task involves extracting structured legal...

  • ML/AI Software Engineer – Optimization for Training, Fine‑Tuning, RL

    2 weeks ago

    Belgrade, Central Serbia AMD Full time €30,000 - €60,000 per year

    WHAT YOU DO AT AMD CHANGES EVERYTHINGWe care deeply about transforming lives with AMD technology to enrich our industry, our communities, and the world. Our mission is to build great products that accelerate next-generation computing experiences - the building blocks for the data center, artificial intelligence, PCs, gaming and embedded. Underpinning our...

  • Senior Backend Engineer

    2 days ago

    Belgrade, Central Serbia Tabby Full time €40,000 - €80,000 per year

    Senior Backend Engineer (Python)Department: Customer Happiness, EngineeringEmployment Type: Full TimeLocation: Remote/SerbiaReporting To: Aleksandr GrishinDescription Tabby creates financial freedom in the way people shop, earn and save by reshaping their relationship with money. Over 15 million users choose Tabby to stay in control of their spending and...

  • Software Engineer II

    1 week ago

    Belgrade, Central Serbia Microsoft Full time €30,000 - €60,000 per year

    Come join Microsoft Word to work on state-of-the-art services, platforms, distributed systems, user experiences, and modern technology to deliver the next generation of productivity experiences used by hundreds of millions of users daily We are looking for Software Engineer II who can help us further grow our products, business, and cultureAt Microsoft...

  • AI First Developer

    2 days ago

    Belgrade, Central Serbia Smartcat Full time €80,000 - €120,000 per year

    *About Smartcat*Smartcat is building the future of work, where human expertise meets digital teammates to drive 10x to 1000x productivity gains for the world's leading enterprises.We're on the frontier of an entirely new category: Agentic AI. We enable enterprises to build high-performing hybrid workforces made up of both humans and AI agents. These AI...

  • AI Systems Engineer

    4 days ago

    Belgrade, Central Serbia Prometeo Talent Full time $120,000 - $150,000 per year

    About UsPrometeo Talent is the highest-rated recruitment agency in America and Europe. We excel at connecting companies with exceptional professionals in technology and engineering. At this time we are collaborating with a company at the forefront of applied AI development, focused on building cutting-edge solutions with real-world impact.Our ProposalWe are...

  • AI Platform

    6 hours ago

    Belgrade, Central Serbia HCS Serbia Full time 900,000 - 1,200,000 per year

    For our partners from Switzerland, we are lookingAI Platform & DevOps Engineer, for remote work from Belgrade, Serbia.Your RoleAs a DevOps Engineer, you will work closely with our AI and development team to ensure that our services and LLM-powered applications run reliably, securely, and efficiently in production. You will be responsible for building,...

  • Senior Software Engineer

    2 days ago

    Belgrade, Central Serbia Bonapolia Full time €40,000 - €80,000 per year

    We are looking for aSenior Software Engineer (Angular) who iswilling to dive into the project with a modern stack. If you're driven by a curiosity to learn and a desire to produce meaningful results, please applyAbout The ClientOur client is one of the Big Four accounting firms and the world's largest professional services network. Headquartered in London,...