Careers

AI Front End Developer

R&D | Belgrade, Serbia

About The Position

KMS Lighthouse is a global software (SaaS) company that drives smarter, better business interactions with its knowledge management solutions. We use advanced technologies and take an innovative approach to building knowledge management solutions. An amazing opportunity to join a hyper-growing company and to make a real impact!

KMS Lighthouse is an industry leader in knowledge management, working with Fortune 500 enterprise-level customers. If you're interested in the intersection of technology, innovation, and knowledge, this is the place to be.

About the Team

You'll be joining a newly formed AI team working at the intersection of product feature delivery and internal AI tooling.

The team operates in a fast-moving space, and the technologies we work with (Claude, agents, skills, MCP, etc.) are themselves new and evolving, so comfort with ambiguity and a willingness to learn as the landscape shifts are essential.


Responsibilities

We are growing its R&D center, and we are looking for a Senior AI Front-End Developer to join our team:

  • Own end-to-end frontend feature delivery, from design through production.
  • Build and maintain internal AI infrastructure: agents and skills used across engineering teams.
  • Design reliable, token-efficient agent workflows with a solid understanding of LLM context management.
  • Work in a small agile team within a global R&D department.
  • Raise the AI bar across R&D through documentation, internal talks, and mentoring.
  • Maintain existing code, fix bugs, and contribute new ideas to the product.

Requirements

We are looking for a specialist who combines strong engineering fundamentals with hands-on experience in modern AI technologies.

AI Knowledge

  • Hands-on experience with LLMs and agentic AI frameworks such as Claude, LangChain, OpenAI Assistants, or similar.
  • Curiosity about how language models behave, where they fail, and how prompts and context influence output quality.
  • Experience with prompt engineering and designing efficient, token-aware agent workflows.
  • A pragmatic engineering mindset - focused on building reliable software systems rather than conducting ML research.

Technical Skills

  • 5+ years of experience building complex applications from concept to production.
  • Strong proficiency in Vue; experience with React, Angular, or Svelte is a plus.
  • Deep understanding of TypeScript/JavaScript, including modern patterns and paradigms.
  • Confidence working with tools such as Vite/Webpack, CI/CD pipelines, and Docker.
  • Experience modernizing legacy frontend codebases (jQuery, ES5).
  • Solid understanding of responsive design, accessibility, semantic HTML, and modern CSS/SASS practices.

Soft Skills

  • Comfortable working in a fast-moving environment where technologies and best practices are still evolving.
  • Clear and structured communicator who creates documentation and scalable patterns instead of relying on tribal knowledge.
  • Eager to share experience, collaborate closely with the team, and continuously grow alongside it.

Advantages

  • Specific experience with Claude: agents, skills, slash commands, MCP servers, context management.
  • Microfrontend architecture (module federation).
  • Cloud deployment and optimization (Azure, AWS).
  • End-to-end testing (Playwright/Cypress).
  • Backend experience in Node.js.
  • Frontend performance optimization (Core Web Vitals).

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