Senior Backend Engineer

We’re hiring a Senior Backend Engineer to work on high-traffic digital platforms and SaaS products used at European scale.

The role is backend-first, focused on C#/.NET services, APIs, and platform foundations.

You’ll have ownership across design, development, and production in a cloud-based environment.

The role

You’ll be joining a large-scale digital platform operating at European marketplace scale, supporting products used by millions of users every month.

This is a backend-first role with real ownership across design, architecture, development, and production. You’ll work on systems that power public-facing platforms as well as SaaS products for professional users, where reliability, performance, and scalability actually matter.

We’re looking for engineers who enjoy autonomy, take responsibility for outcomes, and are comfortable working in a high-traffic, high-impact environment.

What you’ll be working on

• Designing and building backend services and APIs used at large scale
• Developing and evolving C# / .NET backend systems that support:
• high-traffic public platforms
• SaaS tools for professional customers
• Owning services end-to-end: design → implementation → deployment → monitoring
• Improving platform foundations:
• automation
• CI/CD pipelines
• observability and monitoring
• system reliability and performance
• Collaborating closely with product and engineering peers across multiple teams

What we’re looking for

Required

• Strong backend experience with C# / .NET (.NET Core / modern .NET)
• Experience building web APIs (ASP.NET Core)
• Solid understanding of backend architecture (modular systems, services, APIs)
• Experience working with production systems at scale
• Comfortable owning code in production and improving it over time

Strong plus

• Experience with microservices or service-oriented architectures
• Experience with cloud environments (AWS preferred)
• Familiarity with:
• CI/CD
• automated testing
• monitoring and observability
• Experience working on high-traffic platforms or SaaS products

Ways of working

• Backend-focused role (no full-stack expectation)
• On-site team based in Bucharest
• Supportive engineering environment with strong standards
• Clear progression path toward senior-level ownership and impact

Interview process

• Intro call (alignment & expectations)
• Technical discussion with an engineering lead
• Practical assessment (realistic, role-relevant)
• Final technical deep dive
• Decision