Hybrid Fullstack Engineer — React/Next.js, Data & Cloud

Effektify; Halmstads kommun; Hybrid; SEK 700,000 - 900,000; Full time

Job summary

Effektify is a profitable scale-up with 50+ employees and 350+ customers. We are building a platform that turns marketing, e‑commerce, and business data into clearer insights and better decisions.

As a Senior Fullstack Developer, you will work across frontend and backend, with a heavier emphasis on backend, data, and cloud components. You will collaborate with our CTO and a small team in Halmstad, building features end-to-end using React, TypeScript, and Next.js, while ensuring reliability,

Qualifications

• Several years of experience in system development with a fullstack or backend-heavy focus.
• Strong skills in React, TypeScript, and Next.js.
• Experience building backend logic, APIs, and product functionality end-to-end.
• Experience with databases like PostgreSQL or MySQL.
• Comfortable with cloud-based deployments.
• Fluent English, written and spoken.

Responsibilities

• Build features end-to-end across frontend, backend, and data flows.
• Develop and improve APIs, backend logic, and integrations.
• Work with PostgreSQL and MySQL databases.
• Build and refine product experiences in React, TypeScript, and Next.js.
• Improve structure, performance, and maintainability across the stack.
• Collaborate close to cloud and infrastructure aspects of the platform.

Skills

React

TypeScript

Next.js

Fullstack

Backend development

APIs

PostgreSQL

MySQL

English (fluent)

Swedish (good)

Tools

AWS

Terraform

PHP / Laravel

Job description

Effektify is a profitable scale-up with 50+ employees and 350+ customers. We are building a platform that turns marketing, e‑commerce, and business data into clearer insights and better decisions.

As a Senior Fullstack Developer, you will work across frontend and backend, with a heavier emphasis on backend, data, and cloud components. You will collaborate with our CTO and a small team in Halmstad, building features end-to-end using React, TypeScript, and Next.js, while ensuring reliability,