C# Backend Developer (m / f / d)

Optimus Search; Koblenz; Vor Ort; EUR 50.000 - 70.000; Vollzeit

Zusammenfassung

A leading recruitment agency in Germany is seeking a skilled Backend .NET Developer for a forward-thinking IoT company in the energy sector. The successful candidate will develop scalable backend services for a cloud-native platform, taking ownership of the development lifecycle while collaborating with data scientists and frontend developers. Applicants should have 2+ years of experience with C# and ASP.NET Core, a good database proficiency, and advanced German language skills. This role offers exciting opportunities in a modern tech environment.

Qualifikationen

• 2+ years of proven experience in developing backend applications using C# and ASP.NET Core.
• Strong proficiency with databases.
• Hands-on experience with messaging technologies such as Kafka, Azure Event Hub, and MQTT in production environments is an advantage.

Aufgaben

• Develop scalable, reliable, and efficient backend services for the 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.
• Collaborate with frontend developers to create customer-focused applications for multiple platforms.

Kenntnisse

C#

ASP.NET Core

Databases

Complex algorithms

Apache Kafka

Azure Event Hub

MQTT

Domain-Driven Design (DDD)

Event-driven architectures

German (B2 level)

Jobbeschreibung

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).