Senior Software Engineer (.NET)

Frontiers Careers; Madrid; Híbrido; EUR 55.000 - 75.000; Jornada completa

Ventajas ofrecidas por este puesto de trabajo

Office presence emphasis

Wellbeing days

Volunteering days

Employee Assistance Program

Descripción de la vacante

Frontiers seeks a skilled Full Stack .NET Engineer to join the Researcher Profiles Service team. You will design, develop, and maintain scalable web applications using .NET Core/Framework and Vue.js, delivering high-value features to researchers worldwide.

Collaborate with product managers and architects in a multinational, hybrid Madrid-based environment. You will mentor engineers, review code, and advance AI-driven development practices across the stack.

Formación

• 5+ years in software engineering with .NET Core/Framework.
• 3+ years building frontends with Vue.js (Vue 3 a plus).
• Experience with Agile/Scrum environments and REST/GraphQL APIs.
• Strong SQL Server optimization and production troubleshooting.
• Experience owning complex distributed microservice architectures.
• Experience integrating AI into customer-facing apps.

Responsabilidades

• Design, develop, and maintain scalable web apps using .NET and Vue.js.
• Enhance legacy solutions and collaborate with cross-functional teams.
• Write clean, testable code and ensure quality.
• Optimize performance, scalability, and user experience.
• Mentor junior engineers and participate in code reviews.
• Stay current with AI tooling and modern tech trends.

Conocimientos

5+ years .NET

3+ years Vue

Agile/Scrum

Vue.js expertise

SQL Server

REST/GraphQL APIs

AI integration

Distributed architectures

Microservices

Hybrid collaboration

Herramientas

Docker

Kubernetes

Descripción del empleo

Who we are

At Frontiers, our purpose is simple yet ambitious: to make science open. We believe open science empowers the global scientific community to accelerate discovery and develop the solutions needed for healthy lives on a healthy planet. We are one of the world’s largest and most influential open-access research publishers. Every article we publish is peer-reviewed and quality-certified, ensuring research is accessible to everyone, everywhere. To date, Frontiers research has been viewed over 4 billion times, demonstrating the real-world impact of science without barriers

Joining Frontiers means being part of a global, mission-driven organisation at the intersection of science, technology, and innovation — working alongside passionate colleagues who care deeply about advancing knowledge for the benefit of society.

To learn more about our impact and culture, please watch this video: https://www.youtube.com/watch?v=jLJ7ZO3wOW4

About the Role:

We are looking for an enthusiastic Full Stack .NET Engineer to join our team. You will work in the Researcher Profiles Service team, where we build and manage a global-scale academic data platform. Through powerful APIs and intuitive UIs, we make critical research information accessible to the rest of the company and to end-users worldwide. We have fully embraced AI-based spec-driven design, integrating AI throughout the entire software development lifecycle. From specification to implementation, AI tooling shapes how we architect, build, and iterate — making us faster, more deliberate, and focused on what matters most. This isn’t an experiment. It’s how we work. You will take ownership of high-impact projects and drive them to success in a team that’s redefining how modern software is built.

Key Responsibilities:

• Design, develop, and maintain scalable, high-performance web applications using .NET and Vue.js.
• Enhance and support existing solutions built with older versions of .NET and Vue.js.
• Collaborate with product managers, architects, and other cross-functional teams to gather requirements, assess technical feasibility, and determine optimal implementation strategies.
• Collaborate within a multinational, cross-functional team to deliver software solutions aligned with business needs.
• Write clean, maintainable, and efficient code while adhering to best practices.
• Ensure the quality of the delivered solutions.
• Optimise applications for performance, scalability, and responsiveness.
• Troubleshoot and resolve complex technical challenges.
• Conduct code reviews and mentor junior engineers.
• Willingness to learn, flexible approach, and staying current with emerging trends in IT to maintain an up-to-date technology stack.
• Business-oriented attitude with a focus on delivering measurable outcomes for end-users. Demonstrable experience in owning and driving full-stack projects end-to-end, from the specification refinement phase to the production monitoring.

Requirements

• 5+ years of experience in software engineering, specializing in .NET Core/Framework.
• 3+ years of hands-on experience with modern frontend frameworks (Vue 3 is a plus)
• Familiar with Agile/Scrum methodologies.
• Deep expertise in Vue.js, including Vue 2 and Vue 3, with a strong understanding of state management, component-based architecture, and best practices for building scalable front-end applications.
• Strong expertise in SQL Server, including performance tuning, indexing strategies, query optimization, and troubleshooting production issues.
• Heavy experience in implementing APIs with REST and GraphQL
• Experience integrating AI solutions into customer-facing applications.
• Proficient in leveraging AI to enhance daily engineering work.
• Expexienced in owning complex, distributed system architectures
• Solid understanding of microservices and micro-frontend concepts.
• Collaborative and thriving in a hybrid environment.

Nice-to-Have Skills:

• Experience with NoSQL databases (MongoDB)
• Experience with containerization platforms (e.g., Docker, Kubernetes).

Benefits

• We prioritise office presence and emphasise in-person collaboration, but also offer appropriate adjustments where needed, in line with company policy
• Extra wellbeing days on top of your annual leave allowance
• Up to 3 paid volunteering days each year
• 24/7 confidential Employee Assistance Programme (wellbeing, mental health, legal & financial support)
• Learning & development support via the Frontiers Learning Hub
• Competitive local benefits country dependent (e.g. healthcare and pension/retirement provision)

Frontiers actively embraces diversity and is a safe and welcoming workplace. Recruitment is free from discrimination – including based on race, national or ethnic origin, age, religion, disability, sex, gender identity or sexual orientation. With employees from more than 50 different nations, our diversity creates vibrant teams and constantly challenges us to appreciate multiple perspectives.