Backend Developer (.Net Core) - Navigation team - Freelance (W/M/X)

Job Description

Pioneer of online flash sales since 2001 and key player in European e-commerce, Veepee collaborates with over 7,000 brands to offer highly discounted products available for a limited time. Operating across various sectors, including fashion, home, wine, travel or beauty, Veepee achieved a turnover of 3.3 billion euros incl. VAT in 2024 and employs 5,000 staff members across 10 countries.

Tasks

• Develop new features across APIs, background workers, importers, schedulers, and event‑driven services.
• Integrate with internal and external platforms through HTTP APIs, messaging systems, and data pipelines.
• Ensure code quality through clean design, code reviews, automated tests, and observability best practices.
• Contribute to the reliability, scalability, and performance of distributed applications running in production.
• Work closely with Product, Data, and other engineering teams to refine needs and turn them into robust technical solutions.
• Write clear technical documentation and share knowledge with the team.
• Handle technical interviews with other developers who wish to join.

Must Have Skills

• 5+ years of experience in backend software development.
• Strong hands‑on experience with C# and .NET.
• Solid experience building and maintaining APIs, asynchronous processing, and distributed backend systems.
• Strong skills in monitoring, operational support, incident management, observability, and A/B testing are particularly valuable.
• Good knowledge of relational and non‑relational databases, especially PostgreSQL and Cassandra.
• Experience designing and troubleshooting integrations with external or internal services over HTTP.
• Strong focus on code quality, including unit tests, integration tests, and production readiness.
• Comfortable working on systems with concurrency, resiliency, failure handling, and operational constraints.
• Fluent in English.
• Product‑minded, pragmatic, and able to balance technical quality with delivery priorities.

Nice to Have Skills

• Experience with DDD, Clean Architecture, or modular backend design.
• Experience with Dapper, SQL‑heavy applications, and performance‑oriented data access.
• Experience with distributed workers, schedulers, batch/import pipelines, or background jobs.
• Experience with observability, logging, monitoring, and troubleshooting production issues.
• Experience with Postgres, Cassandra, ElasticSearch.
• Experience with event‑driven architectures and messaging platforms such as Kafka or RabbitMQ.
• Experience with AI‑related systems such as LLMs, agents, or MCP.

Benefits

• Variable bonus.
• The dynamic and creative environment within international teams.
• The variety of self‑education courses on our e‑learning platform.
• Participation in meetups and conferences locally and internationally.
• Flexible office with up to 2 days at home.

For the service of diversity and inclusion, Veepee is committed to reviewing all applications received on an equal basis.