C# Backend Developer (m / f / d)

About us

Optimus Search is working with a forward-thinking IoT company in the energy sector that's developing technology to help reduce heating energy use in both new and existing buildings. Their product plays a key role in helping customers reach net-zero climate goals . They're looking to hire a Backend .NET Developer to support their growing team. As a Microsoft Gold Partner , they work with modern tools and technologies, and this role offers the chance to develop solutions in a cloud-based environment.

Tasks

Develop scalable , reliable , and efficient backend services for our cloud-native IoT platform .

Take ownership of entire functional areas or services and guide them through the full development lifecycle .

Actively shape system architecture and select the most suitable frameworks and technologies.

Work closely with data scientists to optimize and implement algorithms that directly impact the user experience.

Operate in a state-of-the-art technology environment with ASP.NET Core and IoT infrastructure .

Collaborate with frontend developers to create customer-focused applications for multiple platforms.

Profile

2+ years of proven experience in developing backend applications using C# and ASP.NET Core.

Strong proficiency with databases.

Passion for implementing and optimizing complex algorithms.

Experience in Domain-Driven Design (DDD) and event-driven architectures .

Hands-on experience with messaging technologies such as Kafka , Azure Event Hub , and MQTT in production environments is an advantage .

Advanced German language skills (B2 level or higher).