Back-End Developer (C#/.NET) - REST APIs & Cloud

Invosy Finland Oy; Helsinki; On-site; EUR 55,000 - 75,000; Full time

Benefits offered by this job

Competitive salary

Excellent employee benefits

Modern office in Kamppi

Growth opportunities

Job summary

Invosy Oy is a growing invoicing service company seeking a skilled Back-End Developer in Helsinki. You will design and implement back-end services and APIs powering both internal systems and client projects.

Join a collaborative development team, write clean code, and contribute to scalable solutions with experience in C#/.NET, SQL, REST APIs, and cloud platforms. Finnish or English fluency is required.

Qualifications

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

Responsibilities

• Design and implement back-end services and APIs powering own systems and client web services.
• Collaborate with front-end developers and designers to deliver seamless experiences.
• Maintain and improve scalable back-end systems.
• Ensure code quality and adherence to best practices.

Skills

C# / .NET

SQL databases

REST APIs

Git

Team collaboration

Tools

Azure

AWS

DevOps

Job description

Invosy Oy is a growing invoicing service company seeking a skilled Back-End Developer in Helsinki. You will design and implement back-end services and APIs powering both internal systems and client projects.

Join a collaborative development team, write clean code, and contribute to scalable solutions with experience in C#/.NET, SQL, REST APIs, and cloud platforms. Finnish or English fluency is required.