L3 .NET + SQL Support Engineer (Madrid) — Hybrid

UST; Madrid; Presencial; EUR 52.000 - 76.000; Jornada completa

Ventajas ofrecidas por este puesto de trabajo

23 days annual leave plus year-end/dis

Health and life insurances

Retribución Flexible program

Training platforms

Career development

Remote work policy

Descripción de la vacante

UST is seeking a talented L3 Support Engineer to join a strategic banking project based in Madrid, Spain. The role requires visiting client offices in central Madrid three days a week and a high level of English.

You will handle escalation, RCA, and complex troubleshooting across .NET, SQL, and distributed systems, with exposure to Kubernetes and CI/CD environments. A strong on-call mindset and collaboration with global teams are essential.

Formación

• 3+ years of hands-on L3 Application Support, Site Reliability, or Software Engineering in high-availability environments.
• English C1 is required.
• Strong backend troubleshooting skills with .NET and C#; solid experience with REST APIs, Microservices, MQ and Kafka.

Responsabilidades

• Serve as the L3 escalation point for critical production incidents, driving resolution via log analysis, code debugging and telemetry.
• Perform root cause analysis (RCA) for outages and coordinate long-term fixes with core development teams.
• Coordinate incident resolution efforts and ensure timely restoration of service.
• Participate in live incident calls and maintain situational awareness until services are restored.
• Monitor, troubleshoot and optimize distributed microservices and event streams in production.
• Maintain database integrity and debug performance issues with complex SQL queries.
• Participate in release management and deployment processes in Kubernetes clusters.
• Join rotating 24/7 on-call duty to support mission-critical applications.

Conocimientos

L3 Support

On-call

Backend troubleshooting

Kubernetes

C#/.NET

SQL

REST APIs

Microservices

Kafka/MQ

Windows/Linux

React familiarity

Herramientas

Dynatrace

Splunk

Grafana

GitLab CI/CD

Jenkins

Descripción del empleo

UST is seeking a talented L3 Support Engineer to join a strategic banking project based in Madrid, Spain. The role requires visiting client offices in central Madrid three days a week and a high level of English.

You will handle escalation, RCA, and complex troubleshooting across .NET, SQL, and distributed systems, with exposure to Kubernetes and CI/CD environments. A strong on-call mindset and collaboration with global teams are essential.