Senior Full Stack Developer

2 weeks ago

ClujNapoca, Cluj, Romania YOPESO Full time €60,000 - €80,000 per year

Yopeso has been developing a diverse range of software products, from large-scale applications to smaller solutions, for 20 years. With a growing team of over 250 employees across five locations, we are dedicated to fostering a culture of growth, transparency, and professionalism.

At Yopeso, we value authenticity, curiosity, and ambition. These values drive us to build strong connections within our community and with our partners, ensuring trust, integrity, and transparency in all our business practices. We strive to maintain the highest professional standards and continuously challenge ourselves to develop high-quality, high-performance, and secure software solutions.

Our approach is rooted in efficient collaboration among passionate professionals working in agile teams. Guided by curiosity and ambition, we strive to create products that are meaningful and impactful, while remaining true to our authentic selves.

What we offer:

  • Competitive remuneration
  • Remote work
  • 24 days off per year and floating days
  • Private clinic health services Regina Maria Medical Insurance
  • Flexible benefits through Up multibenefits platform
  • Referral bonus scheme
  • Team events, online or at the office
  • Training and development opportunities with allocated budget
  • Professional Certifications
  • Knowledge sharing context

We're looking for an experienced Full Stack Developer to join our team and help build an open-source AI chat platform. You'll work with modern technologies, integrate multiple AI providers, and contribute to creating a high-performance, scalable solution.

Responsibilities

  • Develop and maintain frontendandbackend components;
  • Implement real-timefeatures using WebSockets.
  • Integrate multiple AI providers and LLM APIs;
  • Design and optimize MongoDB and PostgreSQL databases;
  • Write automated tests to ensure code quality and stability.
  • Deploy and maintain containerized applications with Docker.
  • Participate in code reviews and maintain high standards.

Requirements:

  • Frontend: (v18+), TypeScript, Vite, TailwindCSS, Radix UI, Headless UI, Tanstack Query, React Router;
  • Backend: (v18+), , REST APIs, JWT/session authentication
  • Databases: MongoDB with Mongoose, PostgreSQL
  • Caching & Sessions: Redis
  • DevOps: Docker, Docker Compose, environment configuration, secrets management
  • Development Tools: Git (advanced workflows), ESLint, Prettier

Nice to Have:

  • WebSocket and real-time application expertise
  • Kubernetes and advanced container orchestration
  • Testing frameworks: Jest, Cypress, or Playwright
  • Integration with OpenAI, Claude, or other LLM APIs
  • Experience with LangChain or RAG implementations

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