Senior Backend Engineer — Scale the Core Financial Engine

Visma; Rotterdam; On-site; EUR 70,000 - 100,000; Full time

Job summary

Yuki is seeking two Senior Back-end Developers to join our development teams (AO Ops and Platform). You will help own, build, and scale the core financial engine and infrastructure that powers our SaaS accounting platform.

As a senior, you will mentor juniors, guide code quality, and collaborate with cross-functional teams to ship robust features. Strong .NET, MSSQL, REST, and DevOps experience required; cloud and NoSQL exposure are a plus.

Qualifications

• 4+ years of backend development with .NET technologies (VB.NET/C#).
• Experience coaching and mentoring junior developers.
• Strong MSSQL relational database experience and API development.

Responsibilities

• Participate in full application lifecycle, focus on optimization and refactoring.
• Improve performance of critical applications for speed and scalability.
• Build readable, maintainable, and performant code using best practices.
• Mentor juniors, conduct peer reviews, and share knowledge across the team.
• Collaborate with cross-functional stakeholders to deliver features.

Skills

NET/.NET Core

C#/VB.NET

SQL MSSQL

API Development

RESTful Services

Azure DevOps

Mentoring

Agile Scrum

Tools

GitHub

NoSQL (MongoDB/DynamoDB)

AWS

Vue.js

Angular

Job description

Yuki is seeking two Senior Back-end Developers to join our development teams (AO Ops and Platform). You will help own, build, and scale the core financial engine and infrastructure that powers our SaaS accounting platform.

As a senior, you will mentor juniors, guide code quality, and collaborate with cross-functional teams to ship robust features. Strong .NET, MSSQL, REST, and DevOps experience required; cloud and NoSQL exposure are a plus.