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Flatrock

Senior Full Stack Engineer (Python / React)

Flatrock Burgas, Burgas, Bulgaria · BGN 2K–BGN 4K/yr

Hospitals and Health Care · 501-1,000 employees

Mar 17
python Senior (5-10 yrs) Full-time Bulgaria
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About the role

Design and develop scalable backend services, RESTful APIs, and modern full-stack applications using Python and React. Integrate AI-powered features, including LLM integrations and RAG-based architectures, while maintaining microservices and optimizing database performance.

What they look for

Python React.js Django FastAPI PostgreSQL TypeScript AWS GCP Microservices Docker Kubernetes CI/CD RESTful APIs LangChain Vector Databases RAG

Requirements

Requires 6+ years of full-stack development experience with strong proficiency in Python, React, and cloud platforms like AWS or GCP. Candidates should hold a degree in Computer Science or a related field and possess experience with microservices and containerization.

Full description

Main responsibilities

  • Design and develop scalable backend services and RESTful APIs
  • Build and maintain modern full-stack applications using Python and React
  • Design and integrate AI-powered features including LLM integrations, machine learning models, and RAG-based architectures with vector search capabilities
  • Work with vector databases and AI orchestration frameworks such as LangChain
  • Design efficient data models and optimize database performance
  • Architect and maintain microservices-based systems
  • Lead integrations with third-party platforms through APIs, data pipelines, and automation workflows
  • Develop data analytics and predictive processing components
  • Implement automation pipelines and workflow orchestration
  • Ensure high performance, scalability, reliability, and security of systems
  • Write unit tests, integration tests, and maintain testing coverage
  • Participate in system design discussions, code reviews, and architecture planning
  • Contribute to architectural decisions and mentor other engineers where needed

Requirements

  • Higher education in Computer Science, Software Engineering, or a related field
  • 6+ years of full-stack software development experience building and maintaining production-grade web applications
  • Strong proficiency in Python and backend frameworks such as Django or FastAPI
  • Experience with PostgreSQL, database design and data modeling
  • Strong experience with React.js / Typescript and modern frontend development (experience with Vue.js or Angular is a plus)
  • Experience with cloud platforms, particularly AWS or GCP services
  • Solid understanding of RESTful APIs, microservices, and system architecture
  • Familiarity with CI/CD pipelines
  • Experience with containerized applications (Docker, Kubernetes)
  • Fluent English and proven experience working in agile and distributed teams
  • Excellent communication and problem-solving skills

Nice to Have• Experience with vector databases such as Pinecone, Weaviate, Milvus, or pgvector

  • Experience building RAG-based AI systems
  • Experience with LangChain, LlamaIndex, or similar AI orchestration frameworks
  • Experience with workflow automation platforms such as n8n, Make, or Airflow
  • Experience with data analytics, BI platforms, or large-scale data processing
  • Experience working on AI-enabled products or intelligent automation systems

About us

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