Full-Stack Software Engineer - C# .NET & Angular

We know you have access to GPT. We use them too. But for your application, please leave the LLM off. We would much rather read two sentences of genuine, slightly imperfect English about who you are than a flawless, five-paragraph AI-generated essay that sounds like everyone else.

About Spacebackend 

Spacebackend revolutionizes system integration in the aerospace industry through AI-driven interoperability across various hardware components. Our product Lynapse streamlines the entire satellite integration workflow by enabling modular integration across payloads, components, and subsystems. The Lynapse core technology transforms hardware specifications into digital twins and automatically generates, tests, and validates hardware-agnostic, OS-agnostic on-board satellite middleware software. Lynapse is a web-based collaborative modeling and design tool for mission-critical projects, allowing teams to create, test, validate, and simulate data interfaces for dozens or hundreds of hardware components composing satellites, spacecraft, or lunar landers. 

Role Overview 

We are hiring a Full-Stack Engineer who will be responsible for end-to-end product development across both frontend and backend in close collaboration with the team.

You’ll both architect and implement end-to-end product features, from Angular UIs and WebSocket-driven data streams to C#/.NET microservices, RESTful APIs, and database schemas. 

What You’ll Do 

Frontend Development

• Build and maintain rich client interfaces using Angular, TypeScript, RxJS, and modern CSS frameworks (e.g., Tailwind, Material). 
• Implement real-time dashboards via WebSockets, charting libraries (e.g., D3, Chart.js), and responsive design.

Backend Development

• Develop scalable microservices in C# on the .NET Core/ASP.NET framework, using dependency injection and SOLID principles. 
• Design and expose RESTful APIs, handle authentication/authorization (JWT, OAuth2), and integrate with message brokers (RabbitMQ, Kafka).

Database & Data Modeling

• Design relational schemas in SQL Server or PostgreSQL and document stores in MongoDB, optimizing queries and indexes for performance. 
• Implement data access layers using Entity Framework Core or Dapper.

Cloud & Deployment 

• Collaborate on CI/CD pipelines (GitHub Actions, Azure DevOps, or Jenkins) and deploy services to Azure, AWS, or equivalent platforms. 
• Configure containerized workloads using Docker and Kubernetes, and manage infrastructure as code (Terraform, ARM templates).

Architecture & Best Practices

• Apply design patterns (Factory, Repository, Observer, Middleware) and adhere to OOP principles to create maintainable, testable codebases. 
• Write unit/integration tests using xUnit, NUnit, Jasmine, or Karma and maintain code quality with linters and static code analysis.

Collaboration & Agile Workflow

• Collaborate with product managers, QA engineers, and DevOps to deliver features in agile sprints.

Who Are We Looking For

We are interested in every qualified candidate who is eligible to work in Luxembourg. However, we are not able to sponsor visas for this position. 

We are seeking an engineer with the following qualities:

1. Full-Stack Versatility: Comfortable switching between UI frameworks and backend services. You take responsibility for features and products across the stack. 
2. Cloud-Committed: You’re eager to learn cloud-native operations and can self-study deployment patterns.
3. Growth Mindset: An experienced engineer, energized by rapid iteration and evolving into technical leads. 
4. Startup Mindset: You are going to work in an early-stage startup, your state of mind is flexible, open to creativity, enthusiasm for solving complex things.

Required Qualifications

1. Bachelor’s or Master’s in Computer Science, Software Engineering, or related field 
2. 3+ years professional experience in full-stack web development 
3. Proficiency in C#/.NET Core and Angular/TypeScript 
4. Strong understanding of RESTful API design and WebSocket communication 
5. Experience with SQL (SQL Server, PostgreSQL) and NoSQL (MongoDB) 
6. Familiarity with Docker and basic Kubernetes concepts 
7. Solid grasp of OOP design patterns and SOLID principles 
8. Version control with Git and collaborative workflows (GitFlow)

Preferred (Nice-to-Have)

1. Experience with cloud services (Azure Functions, AWS Lambda, ECS/EKS) 
2. Knowledge of GraphQL or gRPC for service-to-service communication
3. Familiarity with monitoring/logging stacks (ELK, Prometheus/Grafana)
4. Prior work in high-availability, distributed systems 
5. UI testing frameworks (Cypress, Protractor)

What We Offer

1. Salary + Stock Options Package 
2. Flexible hours & on-site work at Technoport Belval, Luxembourg 
3. Career path to technical lead or executive roles
4. A chance to define the UI/UX and Backend architecture of a cutting-edge space-tech product 

Our Hiring Process

We understand the reality of the current job market: you are competing against hundreds of "perfect" automated resumes, which forces you to polish every word and cast a wide net just to get noticed. We want to bypass that noise and respect your time. Our hiring process is straightforward, transparent, and entirely human. We start by reviewing your initial application for a high-level mutual fit. If we believe there is a match, the next step is simple: we will ask you to send over a short, 60-to-90-second video just talking to us - no production value needed, just you. From there, we move into live, collaborative conversations where we look at actual code together and discuss your technical approach. We do not use unpaid take-home projects or automated quizzes in our hiring process.

How to Apply 

Please send your CV and links to relevant projects or GitHub repos to [email protected] with the subject line: Full-Stack Software Engineer

Important note: We know that no candidate meets every single requirement. However, if you’re passionate about the role and meet most of the requirements, please contact us!