Senior .NET Backend Engineer – Azure, Fintech (Hybrid)

Q-Tech; Barcelona; Hybrid; EUR 60.000 - 75.000; Vollzeit

Benefits dieser Stelle

Hybrid model (1–2 days) in Barcelona

Zusammenfassung

Q-tech is seeking aSenior Backend Engineer to advance their core platform for fintech clients. You’ll design and build backend services in C# / .NET, with strong focus on reliability, performance, and scalable architectures.

The role blends cloud and on‑prem work in Azure, IaC, and DevOps, and requires ownership to lead technical work without people management. Hybrid work from Barcelona with a modern office.

Qualifikationen

• 7+ years of experience as a Backend Engineer.
• Deep expertise in C#/.NET, SQL, and distributed architectures.
• Solid hands-on experience with Microsoft Azure and IaC in production (mandatory).
• Background in regulated, audited, compliance-driven or banking environments.
• Hands-on experience with Docker, performance tuning, and advanced troubleshooting.
• Strong ownership mindset and ability to lead technically without a people-management role.
• Comfortable working in hybrid cloud/on-prem environments.
• High level of English is essential.

Aufgaben

• Design and implement backend services in C# / .NET (ASP.NET Core) with a focus on reliability, scalability, and best engineering practices.
• Define versioned and stable APIs following schema-first models to ensure long-term compatibility and traceability.
• Design and maintain data models, audit models, and key event-driven flows for reporting and regulatory compliance.
• Apply critical backend patterns and engineering standards.
• Contribute to distributed systems with asynchronous processing and messaging.
• Work closely with DevOps to ensure consistent and reproducible environments.
• Participate in the design and maintenance of Azure infrastructure using Infrastructure as Code.
• Provide L3 support for on-prem banking environments (root-cause analysis, hotfixes, reproducibility).
• Optimize SQL performance, diagnose queries, read execution plans, and propose performance improvements.
• Collaborate closely with QA, Security, DevOps, and Data teams to ensure a robust and auditable product.

Kenntnisse

C# / .NET

SQL

Azure

Docker

IaC

Distributed systems

English

Tools

Azure Functions

Azure Service Bus

Kafka

RabbitMQ

Jobbeschreibung

Q-tech is seeking aSenior Backend Engineer to advance their core platform for fintech clients. You’ll design and build backend services in C# / .NET, with strong focus on reliability, performance, and scalable architectures.

The role blends cloud and on‑prem work in Azure, IaC, and DevOps, and requires ownership to lead technical work without people management. Hybrid work from Barcelona with a modern office.