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 looking for a Senior .NET Developer with expertise in backend development and microservices architecture. The ideal candidate will be responsible for building scalable, reliable, and secure applications using modern .NET technologies.

This position is Hybrid/on-site in Lisbon/Porto. (if needed)

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

Key Responsibilities

• Develop and maintain backend services in .NET (C#) using common libraries (Newtonsoft.Json, OpenTelemetry, Swagger/OpenAPI, Moq).
• Implement microservices architecture, ensuring performance, security, and scalability.
• Design and maintain services handling data from multiple sources, including APIs, SQL Server, Elasticsearch, Redis, ActiveMQ, Graph Databases, and CSV files.
• Review and approve Pull Requests from teammates.
• Write and support SQL Server Stored Procedures.
• Implement and maintain OAUTH mechanisms (ADFS knowledge is a plus).
• Develop unit and integration tests to ensure code reliability.
• Manage CI/CD pipelines and TestPlans in Azure DevOps.
• Deploy and configure applications using Kubernetes Helm charts.
• Build Kibana dashboards and write Elasticsearch queries.
• Follow SCRUM methodology and provide task estimations.
• Write technical documentation, ensuring secure coding practices, logging, and auditing compliance.
• Communicate clearly with both technical and non-technical stakeholders.

Requirements

• 5+ years in back-end development with .NET and C#.
• Experience in front-end development (JavaScript, HTML, CSS).
• Strong knowledge of .NET 8+, OOP paradigms, and SOLID principles.
• Fluent in unit and integration testing (Moq, Fluent Assertions, xUnit/NUnit).
• Experience with relational databases (SQL Server), query optimization, and troubleshooting.
• Familiarity with asynchronous programming and messaging systems (ActiveMQ, RabbitMQ, Apache Kafka, ServiceBus, CQRS).
• Experience working in an international/multi-cultural environment.
• Experience with Docker (Kubernetes or Swarm) and with asynchronous programming and messaging patterns is good to have.
• Fluent in English
• Must be a Portuguese or European citizen or have a work permit for Portugal

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!