Senior Full-stack JavaScript Developer

We are looking for a Senior Full-stack JavaScript Developer to join our team in Hungary. In this role, you will design and deliver scalable full-stack applications while collaborating with cross-functional teams to bring high-quality user experiences to life.

This position offers a hybrid model of work, with 3 days per week working from the office located in Budapest.

Responsibilities

• Design, develop and maintain scalable full-stack applications
• Work with other project team members (UI designers, developers, system and testing engineers) throughout the product development, testing and implementation phases to ensure user interface integrity
• Work with customers (project management, content editors) to implement the envisioned functionality
• Provide estimates for how much time it will take to complete the defined layout /development tasks
• Write clean, efficient and well-documented code following industry best practices
• Document the implementation and work products
• Observe the quality rules during the project, supply the QA Leader with upcoming ideas
• Conduct code reviews and supervise other developers
• Participate in SCRUM ceremonies and lead technical meetings
• Stay up to date with emerging technologies and advocate for best practices in full-stack development

Requirements

• 5+ years of relevant work experience
• Advanced knowledge and experience in Typescript/JavaScript/CSS/HTML
• Advanced knowledge and experience in Angular and Node.js
• Strong knowledge and experience in TDD, Unit testing and performance testing
• Knowledge and experience in Server-side rendering (Next.js, Angular Universal, NuXT)
• Work experience with databases (SQL, NoSQL) and cloud technologies (Azure, GCP or AWS)
• Have an overview of common application architectural patterns (microservices, microfrontend, BFF pattern)
• Strong knowledge of programming paradigms (OOP and Functional Programming)
• Good communication and problem-solving skills in English as well
• Be dedicated to implementation of high-quality web user interfaces
• Solid understanding of LLM concepts, prompt engineering techniques (one-shot/few-shot prompting), MCP fundamentals (tools/resources) and AI output evaluation/grading methodologies

Nice to have

• Hands-on experience with AWS Bedrock, AWS AgentCore, LangChain, LangGraph or similar AI agent orchestration frameworks and platforms