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Harnham

Front End Engineer - AI Focus

Harnham
Netherlands · Full-time · Entry

Senior Full Stack / Front-End Engineer (TypeScript, AI Agents)

Location: Remote / Hybrid

Type: Full-time

Level: Senior

The Role

The company is seeking a Senior Full Stack / Front-End Engineer to help build intelligent, AI-powered products. The engineer will focus on delivering high-quality user interfaces while working across the stack to integrate AI agents and LLM-driven systems. This role suits someone who values frontend craftsmanship, system thinking, and product ownership.

Responsibilities

  • Design, build, and maintain scalable front-end applications using TypeScript
  • Develop full-stack features that integrate AI agents, LLM APIs, and external services
  • Collaborate closely with product, design, and AI teams to translate complex AI behaviour into intuitive user experiences
  • Implement robust application architecture, state management, and data flows
  • Ensure performance, accessibility, and maintainability across the codebase
  • Participate in technical decision-making and contribute to engineering best practices
  • Mentor and support other engineers as the team grows

Requirements

  • 5+ years of experience as a Full Stack or Front-End Engineer
  • Strong proficiency in TypeScript and modern JavaScript
  • Extensive experience with frameworks such as React, Next.js, or similar
  • Backend experience using Node.js, Python, or equivalent
  • Experience integrating REST and/or GraphQL APIs
  • Strong understanding of frontend architecture, performance, and UX principles
  • Ability to work effectively in fast-paced, ambiguous environments

Desirable Experience

  • Hands-on experience with AI agents, LLMs, or prompt-based systems
  • Familiarity with streaming responses, tool calling, or multi-step agent workflows
  • Experience working with real-time or event-driven systems
  • Exposure to design systems, accessibility standards, or data-heavy interfaces
  • Previous experience in startup or high-ownership teams

What the Company Offers

  • The opportunity to work on products at the forefront of AI and user experience
  • High-impact role with ownership over core features and technical direction
  • Collaborative, low-ego engineering culture
  • Competitive salary and equity package
  • Flexible working arrangements

Key Skills

Ranked by relevance

ai product design design systems typescript graphql python ux
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Posted
Jan 28, 2026
Type
Full-time
Level
Entry
Location
Amsterdam
Company
Harnham

Industries

Electronic Precision Equipment Maintenance

Categories

Analyst

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