Senior Software Engineer

The Role

We are seeking a highly skilled and experienced Senior Software Engineer to join our technology team in Málaga. In this role, you will take a leading part in our product development—designing and building new features, addressing technical debt, and providing reliable operational support. This is a hands-on position with a strong focus on technical leadership, mentoring, and driving architectural decisions that shape the future of our platform.

Who We Are

At Liquid Barcodes, we’ve developed the world's most advanced digital loyalty and subscription app and SaaS platform that helps our clients connect and build loyalty with their customers. Our technology transforms digital marketing in the convenience sector by closing the loop between the customer and the store. That’s life loyalty.

We work with leading retail brands such as 7-Eleven, Circle K, and Cepsa . Headquartered in Norway, we also have offices in Spain and the US. Our Málaga hub, located right in the city center opposite the Cathedral, is the home of our platform development, quality assurance, and customer success teams.

Key Responsibilities

Lead the design, development, and deployment of new features for our SaaS platform, ensuring scalability, performance, and maintainability.

Drive architectural decisions and provide guidance on best practices for microservices, APIs, and data integrations.

Mentor and support other engineers, fostering knowledge-sharing and raising the overall technical bar.

Identify and proactively address technical debt to keep the codebase healthy and efficient.

Provide reliable operational support, including diagnosing and resolving customer issues, while ensuring long-term fixes and improvements.

Partner closely with stakeholders (Infra, Product, Ops, Customer Success) to balance business priorities with technical considerations and communicate trade-offs clearly.

Contribute to the evolution of our platform by recommending improvements in architecture, security, observability, and cost efficiency.

Your Background

Experience : 7+ years in software development, with proven delivery of complex, high-quality solutions in a product company (SaaS preferred).

Technical Skills :

Expert in .NET framework and C#, with hands-on experience designing and implementing complex systems.

Experience with .NET 8 / 9 (Core), ASP.NET Core, Entity Framework Core.

Strong knowledge of microservices architecture and developing REST APIs at scale.

Proficiency with Docker and Kubernetes for orchestration, deployment, and scaling.

Familiarity with DevOps practices, Infrastructure as Code, and observability tools.

Deep experience with relational and NoSQL databases (MySQL, MongoDB, Redis) including schema design and optimization.

Familiarity with RabbitMQ or other message brokers for event-driven systems.

Hands-on experience with CI / CD pipelines (Jenkins, ArgoCD, GitHub Actions).

Experience with cloud environments, preferably AWS.

Nice to have : familiarity with AI-assisted coding tools (GitHub Copilot, ChatGPT, Cursor).

Soft Skills :

Strong problem-solving ability and technical decision-making.

Ownership and proactivity in driving initiatives.

Excellent collaboration across engineering, product, and business stakeholders.

Clear communication with both technical and non-technical audiences.

Leadership and mentoring skills, capable of setting priorities and balancing trade-offs.

What’s in it for you?

Competitive salary based on experience

Health insurance

Career growth opportunities

International, young, and dynamic environment

️ Office in the heart of Málaga city center

Work-life balance

Hybrid working model and flexible hours

Weekly lunch meetings (optional)

Teambuilding activities