Senior Fullstack Developer - C# and React - Madrid

Shift Technology; Madrid; Híbrido; EUR 50.000 - 70.000; Jornada completa

Descripción de la vacante

A leading AI platform for insurance is looking for a Senior Fullstack Engineer in Madrid. You will be responsible for building complete applications, developing APIs, and collaborating across teams. Ideal candidates have solid C# skills and frontend experience (preferably React). The role offers flexible remote options, competitive salary, and a comprehensive benefits package including mental health support and generous PTO.

Servicios

Flexible remote and hybrid work options

Competitive salary with performance-based bonuses

Generous PTO and paid holidays

Mental health benefits

Company equity

Focus Fridays for learning and growth

Formación

• At least 3 years of software development experience.
• Fluency in English is mandatory.
• Ability to develop both frontend and backend applications.

Responsabilidades

• Build complete designs for our applications and features.
• Collaborate with various teams to improve the agile development process.
• Develop APIs to automate decision-making.

Conocimientos

Solid C# skills

Frontend experience with JS framework (preferably React)

Software development experience

Fullstack capability

Dynamic and proactive

Fluency in English

Herramientas

React

C#

MSSQL

Microsoft Azure

GitHub Actions

Descripción del empleo

Shift is the leading AI platform for insurance. Shift combines generative, agentic, and predictive AI to transform underwriting, claims, fraud, and risk management—driving operational efficiency, exceptional customer experiences, and measurable business impact. Trusted by the world's leading insurers, Shift delivers AI where and when it matters most, at scale and with proven results.

Our culture is built on innovation, trust, and a drive to transform the insurance industry through our SaaS platform. We come from more than 50 different countries and cultures, and together we are creating the future of insurance.

Our Engineering Team is at the core of the value we offer to our customers. We solve complex problems by working collaboratively across squads and teams throughout the organization. If you are excited by solving technical challenges, this is the right place for you! What you'll do: As a Senior Fullstack Engineer, your technical knowledge and autonomy will enable you to build complete designs for our applications and features. You will contribute to a UI for data collection and review, develop APIs to automate decision-making, and build corresponding frameworks. Performance, scalability, and quality are key challenges to address to ensure high-quality code delivery. You will collaborate with teammates—including software engineers, data scientists, QA, UX, and product managers—to continually improve our agile development process. We work with modern technologies and encourage exploration of new market innovations.

Our tech stack:

• Frontend: React, Redux, TypeScript, Vanilla Extract, LESS, Dev Container with Vite
• Backend: C#, MSSQL, Elasticsearch
• IDE: Your choice - Rider, VS Code, or Visual Studio + Resharper
• Cloud: Microsoft Azure
• Toolchain: GitHub Enterprise, GHAS, GH Copilot + coding agent
• CI/CD: GitHub Actions, TeamCity, Cypress, GH Packages (npm, NuGet), Octopus
• Collaboration: Slack, Jira, Confluence

What you bring:

• At least 3 years of software development experience
• Solid C# skills
• Frontend experience with any JS framework (preferably React)
• Fullstack capability: frontend and backend development
• Projects that are well-designed and cleanly written
• Dynamic, curious, eager to learn, and proactive
• Ownership mentality and impact-driven mindset
• Fluency in English

Recruitment Process:

• 30-minute video interview with our Talent Acquisition Specialist
• 1-hour online test
• Two 1-hour technical interviews—one with a Backend developer and one with a Frontend developer
• 1-hour final interview with the Hiring Manager

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To support our employees, we offer a competitive benefits package, including:

• Flexible remote and hybrid work options
• Competitive salary with performance-based bonuses
• Company equity
• Focus Fridays: half-day each month for learning and growth
• Generous PTO and paid holidays
• Mental health benefits
• Two MAD Days per year for volunteering

Additional benefits may vary by country. Intern and Apprentice positions are also eligible for some benefits—please ask your recruiter for details.