Senior Frontend Developer

Halmstad · Hybrid · Engineering

Do you enjoy building frontend products that make complex data easier to understand? Effektify is now looking for a Senior Frontend Developer to build and improve a platform used to turn marketing, e-commerce, and business data into clearer insights and better decisions.

About the role

In this role, you will help shape the frontend of a product where clarity, structure, and usability matter a lot. Effektify brings together data from many different sources, which means a big part of the job is to turn complexity into product experiences that feel clear, fast, and easy to work with.

You will focus on React, TypeScript, and Next.js, and build features that help users explore performance, understand what is changing, and decide what to do next. The role is hands-on and product-focused, with room to influence both implementation details and the broader frontend experience.

You will work closely with Martin, our CTO, and the rest of the tech team, most of which is based in Halmstad. Since the team is still relatively small, you will have broad ownership and a real chance to shape both the frontend structure and the product as it grows.

What you will work on

Your work will include a mix of:

• Building and improving product experiences in React, TypeScript, and Next.js
• Turning complex marketing, e-commerce, and business data into interfaces that are easier to understand and act on
• Building frontend flows for insights, recommendations, and AI-supported functionality in the product
• Working closely with backend and product to build features end-to-end
• Improving frontend structure, performance, and maintainability over time
• Using modern AI tools in development to move faster, test ideas, and improve implementation quality

Examples of projects and focus areas

In the first phase, your work may include areas such as:

• Frontend views for connected performance data
  Build product experiences that help users understand performance across channels, stores, and business metrics without the product feeling heavy or hard to navigate.

• Interfaces for recommendations and AI-supported workflows
  Develop clear product flows for insights, suggested next steps, and AI-supported features so users can understand what matters and what to do next.

• Improving frontend quality as the platform grows
  Strengthen component structure, speed, and maintainability as the product becomes more advanced and more widely used.

Team and setup

A large part of the tech team is based in Halmstad, and for this role that is the preferred location.

We would like you to work from the Halmstad office around 2-3 days per week. The rest can be flexible depending on what makes sense for you and the team.

This is a great environment for you if you enjoy working in a smaller team where decision paths are short, ownership is high, and good ideas are taken seriously. Your initiative will matter here.

What we are looking for

Required

• A couple of years of experience in system development, with a clear focus on frontend
• Strong skills in React, TypeScript, and Next.js
• Experience building modern frontend applications with good structure, usability, and performance
• Comfortable working closely with APIs and product logic
• Fluent English, written and spoken

Nice to have

• Experience beyond frontend, for example in backend, fullstack, databases, cloud, or infrastructure
• Experience from marketing platforms, e-commerce, or other data-heavy products
• Good Swedish, written and spoken

Who are you?

We are looking for a developer who is:

• Curious and forward-leaning
• Interested in new technologies and quick to test better ways of working
• Comfortable using modern AI tools as part of daily development
• Happy to take responsibility and move things forward
• Motivated by broad scope and a close connection between product decisions and implementation

More about Effektify

At Effektify, we help companies understand what drives marketing performance and what to do next.

Our platform brings together data from sources such as Google, Meta, LinkedIn, TikTok, analytics tools, Shopify, WooCommerce, and financial systems. That creates a product environment with a lot of data, many signals, and a constant need to present complexity in a way that feels useful.

For a frontend developer, that means working on more than UI polish. You will help shape how users explore performance, understand changes, navigate recommendations, and interact with increasingly smart product functionality.

Effektify is a profitable scale-up with 50+ employees and 350+ customers. Since 2021, we have grown from a small founding team into a multi-office company with offices in Halmstad (HQ), Gothenburg, Stockholm, Jönköping and Berlin. We have a strong momentum, a working product, and a lot of room to shape what comes next.

Practical details

• Location: Preferably Halmstad, with office presence around 2-3 days per week
• Employment type: Full-time, permanent
• Salary: Fixed market-rate salary
• Start date: By agreement

Apply

Send your application and a few lines about yourself and why this role caught your interest.

For questions, feel free to email martin.lundin@effektify.com.