Senior Frontend Developer
Effektify AB / Datajobb / Halmstad
2026-04-28
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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.
Så ansöker du Sista dag att ansöka är 2026-05-17
Klicka på denna länk för att göra din ansökan Arbetsgivarens referens Arbetsgivarens referens för detta jobb är "HIC-212468".
Omfattning Detta är ett heltidsjobb.
Arbetsgivare Effektify AB (org.nr 559306-3604)
302 47 HALMSTAD
Jobbnummer 9881319