Middle Fullstack Developer (Python + React.js)
Primary stack
Nice to have's
Job description
About the Position
We’re looking for a skilled and curious Middle Fullstack Developer (Python + React.js) to join our senior engineering team and help deliver next-generation products - from payment platforms and digital wallets to AI-powered dashboards. You’ll work on real AI applications, building features end-to-end and contributing to cutting-edge solutions that combine backend engineering and applied AI.
Responsibilities
- AI Development: Build and enhance features for AI agents and RAG pipelines using LangChain or LangGraph
- Backend Engineering: Develop and maintain FastAPI services and REST endpoints
- Data Layer Work: Integrate and optimize vector databases (pgvector, Qdrant, Pinecone, Weaviate)
- OpenAI Integration: Work with OpenAI API for function calling, embeddings, and prompt optimization
- Testing & Monitoring: Write tests, improve prompts, add basic monitoring and traces
- Deployment: Package and deploy with Docker, assist with metrics, logs, and performance insights
Requirements
- 1+ year of hands-on experience with Python (commercial projects or strong personal builds)
- Proven experience creating AI-driven applications (chatbots, retrieval tools, simple agents, etc.)
- Understanding of LangChain / LangGraph, RAG, and vector databases
- Solid knowledge of FastAPI and REST fundamentals
- Familiarity with Git, basic SQL/NoSQL (PostgreSQL or MongoDB), and Docker
Nice to Have
- Basic knowledge of React, Next.js, or TypeScript - or eagerness to learn
- Exposure to Prometheus, Grafana, or OpenTelemetry for observability
- Experience with CI/CD (GitHub Actions) and cloud platforms (AWS/GCP)
- Familiarity with Redis, message queues, or caching strategies
Our Modern Stack
Backend: Python, FastAPI, LangChain/LangGraph, OpenAI API, pgvector, Qdrant, Pinecone, Weaviate, PostgreSQL, MongoDB, Redis, Docker, Prometheus, Grafana, OpenTelemetry
Frontend: React 19, Next.js, TypeScript
We Offer
- Opportunity to work on AI-first, production-grade products
- Senior, collaborative team focused on quality and innovation
- Flexible, 100% remote environment
- Competitive compensation and room for growth
If you’re excited about building real-world AI applications and want to be part of a modern, fast-moving tech team - we’d love to hear from you!
Workplace
Remote
Location
EU countries and Ukraine
Employment Type
Full-time
Level
Middle
Posted
November 11, 2025
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