Back to jobs

Front End Engineer - AI Focus

Harnham
Amsterdam, North Holland, Netherlands
Full-time
AI tools:
LLM APIs
AI agents

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

Applications go to the hiring team directly