Junior Back-end Developer

Työmarkkinatori; Helsinki; On-site; EUR 45,000 - 75,000; Full time

Benefits offered by this job

Competitive salary

Excellent employee benefits

Modern Kamppi office

Job summary

Invosy Oy is seeking a Back-End Developer to design and implement scalable back-end services and APIs for our own systems and client projects. You will work with front-end developers and designers to deliver robust, efficient solutions.

We value clean, maintainable code and familiarity with cloud platforms. The role requires at least two years in back-end development and fluency in Finnish or English, with competitive salary and strong growth opportunities in Helsinki.

Qualifications

• 2+ years of back-end development experience
• Strong knowledge of C# / .NET and SQL databases
• Experience designing and building REST APIs
• Ability to write clean, efficient, and maintainable code
• Experience with version control (Git)
• Understanding of application architecture and scalability
• Teamwork skills and a willingness to learn
• Fluent in Finnish or English

Responsibilities

• Design and implement back-end services and APIs powering our own systems and client web services
• Collaborate with front-end developers and designers to deliver seamless user experiences
• Build scalable and efficient back-end architectures and services

Skills

Back-end development

C# / .NET

SQL

REST APIs

Git

Cloud familiarity

Teamwork

Willingness to learn

Tools

Git

Job description

Who we are

Invosy Oy is a growing invoicing service company that designs and develops its own systems, websites, and digital services for businesses. We operate from a modern office in the heart of Helsinkis Kamppi district, where teamwork and open communication are at the core of everything we do.

We focus on high-quality code, long-term development, and understanding our clients' businesses. You will have the opportunity to work on meaningful projects that matter to us and our clients.

Your role with us

We are now looking for a Back-End Developer who is passionate about building scalable and efficient back-end systems. You will work as part of our development team, designing and implementing back-end services and APIs that power both our own systems and custom web services for our clients. In collaboration with front-end developers and designers, you will help build powerful solutions that provide smooth and seamless user experiences.

Technologies we use:

• C# / .NET for back-end development
• SQL working with databases and integrations
• JavaScript basic knowledge for handling API integration and client-side logic
• REST APIs building and maintaining APIs for web services and systems
• Familiarity with cloud platforms (Azure, AWS) and DevOps practices is a plus

What we expect from you:

• Previous experience in back-end development (at least 2 years)
• Strong knowledge of C# / .NET and SQL databases
• Experience with designing and building REST APIs
• Ability to write clean, efficient, and maintainable code
• Experience working with version control (Git)
• Understanding of application architecture and scalabilityTeamwork skills and a willingness to learn
• Fluent in Finnish or English

What we offer you:

• Interesting projects with the opportunity to influence their implementation
• A supportive work environment and colleagues who will help you grow
• A modern workspace in a cozy office in the heart of Kamppi
• A competitive salary and excellent employee benefits