Senior Backend Developer Lisboa

Senior Backend Developer
Lisboa
Lisboa, Lisboa, Portugal

Emagine is currently looking for a Senior Backend Developer to join our team on an exciting journey to redefine global connectivity. We are building a decentralized mobile network powered by collaboration, open spectrum, and intelligent infrastructure. This is a unique opportunity to contribute to a
- impact initiative at the intersection of telecom, cloud, and web3.

Your main responsibilities:

Develop and maintain backend services with a focus on scalability, modularity, and maintainability.

Build and expose REST APIs for both internal systems and
- party integrations (authentication, billing, analytics).

Work with
- driven communication patterns using Kafka to decouple services and ensure resilient architectures.

Deploy containerized services using Docker into
- based environments (e. g. , Kubernetes, Nomad).

Implement and maintain centralized identity and access management (IAM) through platforms like Keycloak.

Collaborate with
- functional teams to define architecture, review code, and establish best practices.

Contribute to monitoring, tracing, and continuous improvement of service performance.

You bring:

3–5 years of professional backend development experience.

Strong expertise in Node. js , with proven experience in
- based architectures.

Solid background in designing and maintaining REST APIs , including versioning and error handling.

Hands-on experience with Kafka or other
- driven messaging systems.

Practical knowledge of deploying services in containerized and clustered environments.

Familiarity with authentication/authorization models and centralized IAM (e. g. , Keycloak).

Ability to design schemas and queries for Mongo
DB and SQL databases.

Comfort with CI/CD tools such as Git
Hub Actions and API documentation standards like Open
API/Swagger.

Understanding of monitoring practices using tools like Prometheus/Grafana.

Strong
- solving skills, curiosity, and the ability to thrive in an innovative,
- paced environment.

Nice to have:

Experience integrating with web3 platforms (wallet management systems,
- based identity flows).

Exposure to
- tenant or federated service models.

Experience contributing to web3 projects involving wallet authentication, token management, or blockchain usage tracking.

General knowledge of decentralized identity, smart contracts, or blockchain data indexing.