Fullstack Software Engineer – Backend, Frontend

CoreWillSoft GmbH

Fullstack Software Engineer developing secure IoT solutions for businesses at CoreWillSoft. Collaborating with teams across Europe on smart building technology.

Posted 4/13/2026contractRemote • 🇩🇪 GermanyMid-LevelSenior💰 €5,000 - €6,000 per monthWebsite

Tech Stack

Tools & technologies

AngularAWSAzureCloudDockerGrafanaIoTJavaJavaScriptKotlinMicroservicesMongoDBNoSQLPostgresPrometheusReactReduxSpringSpring BootSpringBootTypeScriptVue.jsWebpack

About the role

Key responsibilities & impact

You will work on products used by businesses across Western Europe.
Our team operates in a scaled agile approach across Europe with a headquarter in Bonn, Germany.
It is responsible for the complete software development lifecycle; including ideation, implementation, and operation of the secure IoT software operating smart buildings and smart homes across the world.

Requirements

What you’ll need

Proficiency in Kotlin and/or Java for backend development
Strong experience with the Spring Boot framework
Experience with Docker and containerized applications
Familiarity with cloud platforms such as AWS, Azure, or Google Cloud
Experience in designing and consuming RESTful APIs
Knowledge of microservices architecture and patterns
Experience with on-premise and cloud-based deployments
Proficiency in secure coding practices and understanding of security best practices for backend systems
Familiarity with scalability strategies and performance optimization in backend services
Knowledge of monitoring and observability tools (e.g., Prometheus, Grafana, ELK)
Knowledge of cryptography and security
Familiarity with CI/CD processes, including GitHub Actions, GitLab CI, or similar tools
Experience with version control systems (e.g., Git)
Experience with database technologies, both relational (e.g., PostgreSQL) and NoSQL (e.g., MongoDB)
Strong experience with React.js or Angular, or Vue
Solid knowledge of TypeScript / JavaScript, HTML5, CSS3
Experience with modern tools (Vite, Webpack, npm, etc.)
Understanding of state management (e.g., Redux).

Benefits

Comp & perks

Great customer impact: the solutions you deliver will be used by thousands of large and small businesses
Ability to shape the product, working, and delivery process
Great team spirit and Team Events
Agile and innovative environment
Cutting-edge technologies
Working on the latest Hardware
Convenient office or co-working, depending on your location.

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

KotlinJavaSpring BootDockerAWSAzureGoogle CloudRESTful APIsmicroservicessecure coding practices