Senior Backend Developer

Nexxiot is digitalizing freight asset management with technology that now oversees the world’s most extensive network of connected intermodal containers and railcars.

Clients gain access to unparalleled real-time data, which streamlines fleet management and automates logistics processes. Nexxiot devices, built for resilience, withstand extreme conditions and provide long-term, detailed insights into cargo events, including impacts, delays, safety and security incidents, and loading activities.

Based in Zurich, Switzerland, Nexxiot’s influence extends globally. Our team, comprised of industry experts, operates from offices in Europe and North America and maintains a presence in a majority of depots, ports, and rail yards.

To learn more about how Nexxiot is leading the value generation for the rail industry, please visit www.nexxiot.com.

The Role

We are an IoT startup turning massive-scale, low-power device data into real-world impact. With a fleet of more than one million connected devices, we generate high-volume telemetry every day. We are looking for a passionate Backend Developer to help enrich, transform and distribute this data in a flexible hybrid setup combining remote and in-office work from our new office in the center of Porto.

You will join an interdisciplinary agile product team and contribute to the design, implementation and operation of distributed backend services. Together with your team, you will build reliable, scalable systems that process large volumes of device data and power customer-facing products.

We are looking for someone curious, pragmatic and collaborative who enjoys solving complex problems, automating repetitive tasks, and continuously improving how the team works.

Your responsibilities

• Design and implement backend services, including tests and  technical documentation
• Deploy and operate services using CI/CD best practices
• Take end-to-end ownership across the full lifecycle: design, implementation, testing, deployment and operations
• Monitor services and data streams and respond to anomalies
• Provide 3rd-level support and ensure service availability during business hours
• Review merge requests and design documents from teammates
• Participate in agile software development activities (e.g. planning meetings, reviews, retrospectives…)

Requirements

• 5+ years of professional software development experience
• Strong experience with Kotlin or Java
• Solid knowledge of backend architecture, distributed systems and API design
• Experience with SQL (PostgreSQL) and/or NoSQL (DynamoDB)
• Familiarity with messaging systems (Kafka, SQS, SNS)
• Experience building and operating containerized services (Docker, Kubernetes, ECS or Fargate)
• Solid understanding of software testing (TDD is encouraged but not mandatory)
• Curious and never afraid of learning to master new tools, technologies, and methodologies
• Fluent in English

Nice to have:

• Geospatial data experience
• Gradle knowledge
• Linux / Unix shell skills

Work authorization: Applicants must be legally authorized to work in Portugal. Unfortunately, we are not able to sponsor visas for this role.

Our Backend Stack

• Kotlin / Java 
• Apache Kafka 
• SQS 
• DynamoDB 
• CockroachDB
• Gradle
• Docker
• Kubernetes