Fullstack and AI Developer

Digital Fans AB; Stockholms kommun; On-site; SEK 700,000 - 900,000; Full time

Job summary

Digital Fans AB is seeking a Fullstack and AI Developer to build digital products where software development and AI converge. You’ll work across the stack with TypeScript/React to create client-facing apps, dashboards and AI-powered workflows.

You’ll collaborate with design and clients to deliver production-ready solutions, shipping observable, scalable AI components and robust integrations across systems like Shopify, Azure, and CMS platforms.

Qualifications

• 5+ years of professional software development experience.
• Strong experience with frontend and modern web development.
• Deep experience with TypeScript and React.
• Experience with frameworks such as TanStack Start, React Router or Next.js.
• Comfortable working across the full stack, including Node.js, APIs, integrations and data.
• Hands-on experience building and shipping LLM-powered features such as tool calling, RAG or agentic workflows.
• Experience with an agent framework or SDK such as Mastra, OpenAI Agents SDK, Claude Agent SDK or LangGraph.
• Experience shipping production applications and working with modern development infrastructure.
• Experience with headless CMS platforms, Shopify, Azure, Docker and Cloudflare is a plus. Experience with Mastra and Amazon Bedrock AgentCore is also a plus.

Responsibilities

• Build client-facing web applications and digital products in TypeScript and React.
• Develop products using TanStack Start, React Router and Next.js.
• Turn designs and user experiences into high-quality, responsive digital products.
• Build LLM-powered features and agent workflows and integrate them into real product experiences.
• Connect AI systems to client data, tools and platforms.
• Work with headless CMS platforms and e-commerce solutions such as Shopify.
• Build APIs, integrations and backend functionality when needed.
• Prototype new AI-powered solutions quickly and turn the strongest ideas into robust production services.
• Build AI components that are observable, testable and cost‑aware.
• Contribute to technical architecture and how we develop our AI capabilities.
• Take ownership of solutions from early exploration to production.
• Work closely with design to create digital experiences where technology and AI feel like one product.
• Collaborate directly with clients and stakeholders to understand real business and user needs.
• Share knowledge and contribute to how the wider team builds with AI.

Skills

TypeScript

React

Frontend development

Full-stack development

LLM-powered features

API integrations

English fluency

Modern development practices

Tools

TanStack Start

React Router

Next.js

Node.js

Mastra

OpenAI Agents SDK

Claude Agent SDK

LangGraph

Shopify

Azure

Docker

Cloudflare

Amazon Bedrock AgentCore

Job description

About the role

As a Fullstack and AI Developer at Digital Fans, you build digital products where software development and AI increasingly become one.

You have a strong foundation in frontend and modern web development, while being comfortable working across the stack. You will build the product experiences people interact with and the AI capabilities behind them — from web applications and dashboards to agents and automated workflows.

Many of our projects are frontend-heavy, so you should genuinely enjoy building high-quality digital experiences. At the same time, you have moved beyond experimenting with AI and have started building LLM-powered features and solutions in practice.

You will be a core member of our tech team and help us build the next generation of digital products for our clients.

What you’ll do

• Build client-facing web applications and digital products in TypeScript and React
• Develop products using frameworks such as TanStack Start, React Router and Next.js
• Turn designs and user experiences into high-quality, responsive and accessible digital products
• Build LLM-powered features and agent workflows and integrate them into real product experiences
• Connect AI systems to client data, tools and platforms
• Work with headless CMS platforms and e-commerce solutions such as Shopify
• Build APIs, integrations and backend functionality when needed
• Prototype new AI-powered solutions quickly and turn the strongest ideas into robust production services
• Build AI components that are observable, testable and cost‑aware
• Contribute to technical architecture and how we develop our AI capabilities
• Take ownership of solutions from early exploration to production
• Work particularly closely with design to create digital experiences where technology and AI feel like one product
• Collaborate directly with clients and stakeholders to understand real business and user needs
• Share knowledge and contribute to how the wider team builds with AI

Experience

• 5+ years of professional software development experience
• Strong experience with frontend and modern web development
• Deep experience with TypeScript and React
• Experience with frameworks such as TanStack Start, React Router or Next.js
• Comfortable working across the full stack, including Node.js, APIs, integrations and data
• Hands‑on experience building and shipping LLM‑powered features such as tool calling, RAG or agentic workflows
• Experience with an agent framework or SDK such as Mastra, OpenAI Agents SDK, Claude Agent SDK or LangGraph
• Experience shipping production applications and working with modern development infrastructure
• Experience with headless CMS platforms, Shopify, Azure, Docker and Cloudflare is a plus. Experience with Mastra and Amazon Bedrock AgentCore is also a plus.

Who you are

• You are a strong product developer with a frontend focus who is genuinely excited about what AI makes possible
• You enjoy building complete products rather than isolated AI demos
• You care about both the experience people interact with and the technology behind it
• You think about user outcomes and business value, not just models and benchmarks
• You are comfortable moving between established engineering practices and emerging technology, and between product development and AI development depending on the problem you are solving
• You are curious, pragmatic and willing to experiment, balancing speed with the quality required for production systems
• You enjoy working closely with designers and people from different disciplines
• You are comfortable working across multiple projects
• You are fluent in English, written and spoken

About Digital Fans

Digital Fans is a digital growth partner based in Stockholm. We work at the intersection of strategy, design, technology, data and AI to build digital products, platforms and solutions that create measurable growth and efficiency for well-known Nordic and international brands.

We are growing our team and scaling our technology and AI capabilities, building everything from websites, e-commerce and digital platforms to AI-powered products and automated workflows. Joining us now means having a real opportunity to influence what we build, how we build it and how our capabilities evolve.

We are a small, senior team where developers work closely with designers, strategists and other specialists, with short decision paths and real influence over what we build. As part of NORD DDB, we combine the pace and collaboration of a smaller team with the reach of a larger network.