Senior .NET Backend Engineer – APIs & Cloud

Festo; l'Hospitalet de Llobregat; On-site; EUR 70,000 - 90,000; Full time

Benefits offered by this job

Development opportunities

Strong team support

Freedom to innovate

Global network

Family-owned culture

Job summary

Festo, a global leader in industrial automation, is seeking a Senior Backend Developer to join the IT Digital Marketing team in Barcelona. You will design and build backend services, APIs, databases, and integrations supporting our digital marketing and sales capabilities.

As a senior member of an international Agile team, you will own backend solutions, contribute to architectural standards, and collaborate with frontend engineers, product owners, and stakeholders across countries.

Qualifications

• Backend or software engineering with frontend integration exposure.
• Strong hands-on programming with C# and the .NET ecosystem.
• Experience designing APIs (REST) and working with relational databases.
• Experience implementing CI/CD pipelines, automated testing, and reliable software delivery processes.
• Practical experience applying Test-Driven Development (TDD) and maintaining well-tested codebases.
• Agile mindset and practical experience in Scrum teams.
• Ability to communicate technical topics clearly with technical and business stakeholders in an international environment.
• Very good written and spoken English.

Responsibilities

• Design, build, and maintain backend services, REST APIs, message-driven services, search capabilities, and database schemas supporting customer-facing digital products.
• Develop business logic, domain services, and data-access layers using C# and .NET, focusing on scalability, security, observability, and fault tolerance.
• Design and implement integrations with external platforms and services, including WCMS, DAM, Marketing Automation, Consent Management, and Web Analytics solutions.
• Build and improve CI/CD pipelines, automated testing strategies, deployment processes, and quality gates.
• Apply and promote engineering practices such as automated testing, code reviews, versioning, continuous integration, monitoring and logging.
• Participate actively in Agile team activities and contribute to planning, estimation, and reliable iterative delivery.
• Produce and maintain clear technical documentation, including architecture decisions, API specifications, integration designs, and operational runbooks.
• Analyse and resolve second-level support cases, identify root causes, and implement sustainable solutions to prevent recurring issues.

Skills

C# & .NET

API design

Relational databases

CI/CD pipelines

TDD

Agile/Scrum

English communication

Frontend integration

Job description

Festo, a global leader in industrial automation, is seeking a Senior Backend Developer to join the IT Digital Marketing team in Barcelona. You will design and build backend services, APIs, databases, and integrations supporting our digital marketing and sales capabilities.

As a senior member of an international Agile team, you will own backend solutions, contribute to architectural standards, and collaborate with frontend engineers, product owners, and stakeholders across countries.