Senior C#/.NET Developer

Empowered by our motto, "Making Data Matter", Keyrus stands at the forefront of global consultancy in Data & Analytics, AI & Machine Learning, and Digital Transformation. With a presence in 27 countries across 4 continents, we're on a mission to elevate the impact of data.

We are data experts, guiding our clients through their data journey regardless of their level of maturity in analytics. As an end-to-end partner, we address varied challenges that our clients face, from Advanced Analytics, Cloud, Data Governance, Visualisation to Enterprise Performance Management, from advisory to delivery.

With more than 3200 employees in all corners of the world, Keyrus is dedicated to helping businesses taking advantage of the Data and Digital paradigm to enhance their performance, facilitating, and accelerating their transformation, and generating new drivers of growth, competitiveness, and sustainability.

Job Summary

Keyrus is seeking a Senior C# Developer to join a high-impact project focused on building secure, cloud-native data applications for the insurance sector. The mission is to design and implement scalable, compliant systems that handle sensitive personal and health information (PII/PHI) across regions. This role requires strong backend development expertise in C#/.NET, cloud integration with Azure, and familiarity with modern UI frameworks like Blazor for internal tool development.

This position is remote, but you must be based in Portugal or Spain.

Note: All applications/CV’s must be submitted in English.

Key Responsibilities

• Design and implement microservices using C# and .NET
• Build internal tools with Blazor for data visualisation, dashboards, and form-based data entry
• Develop reusable UI components to enhance usability and workflow efficiency
• Build secure and auditable REST APIs for data ingestion, validation, processing, and provisioning
• Write and optimise SQL queries and stored procedures for aggregation, validation, and extraction
• Integrate with data privacy vaults and secure APIs for regional data access
• Integrate APIs and services with Azure App Services, API Management, Service Bus, and Kubernetes
• Apply secure coding practices: encryption, tokenisation, and authentication
• Implement tokenisation/detokenization logic for PII/PHI in line with data privacy laws
• Manage and query Azure SQL, Snowflake, and related data systems
• Work in sprints with the development team; participate in code reviews
• Contribute to CI/CD pipelines and deployment automation in Azure
• Write unit and integration tests to ensure quality and compliance
• Document code, architecture, and API contracts for audits and team use

Requirements for the role

• 6+ years of professional experience with C#/.NET backend development
• Strong knowledge of REST API design, microservices, and secure coding standards
• Experience with Azure services: App Services, API Gateway, Kubernetes, Service Bus
• Solid database skills: SQL Server
• Familiarity with Azure SQL
• Hands-on experience with Blazor for internal web tools and data visualisation UIs
• Familiarity with data tokenisation, encryption, and privacy regulation compliance
• Proven track record of working in Agile teams, DevOps culture, and cloud-native projects
• Excellent communication and documentation skills
• Fluent in English
• Must be a Portuguese or European citizen or have a work permit for Portugal

Good to have:

What we offer at Keyrus Portugal:

• Competitive salary based on your skills & experience and according to the Data market practice
• Meal allowance of €8.32 per day
• Flexible benefits option
• Private Medical Insurance
• 22 days of annual leave (increasing every 3 years up to a maximum of 25 days)
• Training Program through KLX (Keyrus Learning Experience) Platform

Why Keyrus?

Joining Keyrus means joining a market leader in the Data Intelligence field and an (inter)national player in Management Consultancy and Digital Experience.

Keyrus Portugal operates on five guiding pillars that shape our approach to work and collaboration – Diversity; Trust; Flexibility; Ownership & Innovation - we're dedicated to cultivating a team as diverse as the challenges we take on.

We embrace and celebrate the rich variety of backgrounds, perspectives, and talents that each individual brings. We firmly believe that diversity fuels innovation, ignites creativity, and propels us towards greatness.

Regardless of race, ethnicity, gender, sexual orientation, disability, age, or any other dimension of diversity, everyone is not only welcome but valued here.

Join us in shaping a future where everyone can thrive!