Full-Stack Software Developer

Karo-Solutions Sweden; Stockholms kommun; Hybrid; SEK 700,000 - 900,000; Full time

Benefits offered by this job

Flexible hybrid/remote work

International team

Direct access to experienced engineers

Autonomy and ownership

Job summary

Karo-Solutions Sweden is seeking a skilled Full-Stack Software Developer to design, build, test, and improve production software across the stack. You will collaborate with engineers, product stakeholders, and other teams to translate business needs into reliable, user-friendly technical solutions.

The role emphasizes ownership of features from idea to release, strong fundamentals in software engineering, and a product-minded approach in an international, fast-growing environment.

Qualifications

• 4+ years of professional software development experience.
• Strong knowledge of frontend technologies (JavaScript/TypeScript, React, HTML/CSS).
• Experience building production web apps or SaaS products.
• Experience with relational databases (PostgreSQL, MySQL, SQL Server).
• Experience designing and working with APIs and third-party integrations.
• Experience with automated testing and modern software development practices.
• Strong understanding of software architecture and data structures.
• Ability to understand complex problems and turn them into simple, maintainable solutions.

Responsibilities

• Design, build, test, and improve production software across the stack.
• Collaborate with engineers, product stakeholders, and other teams to translate needs into solutions.
• Own features from idea through release and continuous improvement.
• Contribute to architecture and product decisions.
• Participate in code reviews and technical discussions.

Skills

Full-stack development

Backend languages

Frontend technologies

Relational databases

APIs & integrations

Automated testing

Git & collaboration

Problem solving

Communication

Product mindset

Tools

Git

Job description

We are working with a dynamic and fast-growing technology company building innovative software products for the modern B2B market.

The company operates in an international environment, with distributed teams across Europe and North America, and combines strong product thinking with a practical, engineering-driven approach.

Depending on the product and team, you may work on SaaS platforms, data-driven features, AI-powered functionality, customer-facing applications, integrations, and the infrastructure that brings everything together.

We are looking for a Full-Stack Software Developer who enjoys building things end-to-end, solving real problems, and taking ownership of their work from idea to production.

This is an opportunity to join a growing technology environment where your contribution can have a direct impact on the product and its customers.

About The Role

As a Full-Stack Software Developer, you will work across the stack to design, build, test, and improve production software.

You will collaborate closely with engineers, product stakeholders, and other teams to turn business and customer needs into reliable, user-friendly technical solutions.

Requirements

• Building and maintaining full-stack web applications and SaaS products
• Developing backend services, APIs, integrations, and business logic
• Building responsive and user-friendly frontend experiences
• Working with relational databases and designing efficient data models and queries
• Integrating third-party services and external APIs
• Working with data-driven or AI-powered functionality
• Writing automated tests and maintaining high standards of code quality
• Investigating and resolving production issues and performance bottlenecks
• Participating in code reviews and technical discussions
• Contributing to architecture and product decisions
• Working closely with product and business teams to understand the "why" behind what you are building
• Taking ownership of features from initial idea through development, release, and continuous improvement

We value engineers who can work independently while knowing when to collaborate, ask questions, or challenge an existing approach.

What We're Looking For

We are open to different technical backgrounds. You don't need to match every technology in our stack.

What matters most is that you have a strong software engineering foundation and can demonstrate that you have built and shipped production software.

• 4+ years of professional software development experience
• Solid experience building production web applications or SaaS products
• Strong knowledge of at least one modern backend technology or language such as C#, .NET, TypeScript, Node.js, Java, Python, or similar
• Good understanding of frontend development and experience with technologies such as JavaScript, TypeScript, React, HTML, CSS, or similar
• Strong SQL and experience working with relational databases such as PostgreSQL, MySQL, SQL Server, or similar
• Experience designing and working with APIs and third-party integrations
• Experience with automated testing and modern software development practices
• A good understanding of software architecture, data structures, and fundamental engineering principles
• Experience working with Git and collaborative development workflows
• The ability to understand complex problems and turn them into simple, maintainable solutions
• Good communication skills and the ability to explain technical ideas clearly
• A product mindset and genuine curiosity about the problems your software is solving

The right background matters more than the exact stack

We know that great engineers do not always follow the same technology path.

You might be a .NET developer who has gradually moved into modern frontend development, a TypeScript full-stack engineer with strong backend experience, a Python engineer who has become increasingly product-focused, or someone with a different combination of technologies altogether.

If you are a strong full-stack engineer who enjoys learning, taking ownership, and building software that solves real problems, we'd like to hear from you.

Benefits

• Flexible hybrid or remote work, depending on the team and role
• International team and multicultural environment
• Direct access to experienced engineers, product leaders, and founders
• High level of ownership and autonomy
• Regular opportunities to work with modern technologies, AI, and data-driven products
• Collaborative culture with short feedback loops and minimal bureaucracy
• Opportunity to make a visible impact as the company grows