Principal Software Engineer (Any language)

Principal Backend Software Engineer

Location: Remote or Hybrid (Lisbon, Portugal)

Salary: €4,000–€6,000 gross per month

We are looking for an experienced Backend Engineer who is passionate about designing and delivering high-performance services at scale. As a key contributor to our engineering team, you will help build the systems that power mission-critical customer products, internal platforms, and large distributed applications.

You will collaborate with cross-functional product teams, shape the technical roadmap, and influence engineering excellence across the organisation. As a Principal Engineer you will lead from a technical point of view, mentor others and help drive impactful architectural decisions.

What you will do

• Design, build, and maintain backend services and APIs
• Architect new features end to end, from concept to deployment
• Improve system performance, reliability, and scalability
• Work with distributed systems, microservices, and asynchronous messaging
• Contribute to clean, reusable, and maintainable code
• Guide and support other engineers through code reviews and knowledge sharing
• Help define standards, best practices, and technical direction

What you bring

• Strong experience in backend engineering and service-oriented architecture
• Proficiency in any modern backend language considered (Java, .NET, Kotlin, Go, etc.)
• Willingness to work with our current stack: .NET / C#
• Hands-on experience with microservices, distributed systems, and messaging tools (RabbitMQ, Kafka, etc.)
• Deep understanding of performance tuning, concurrency, and async patterns
• Experience on large-scale systems with monitoring, metrics, and observability
• Ability to take ownership, plan autonomously, and deliver complex solutions

Nice to have

• Event-driven or reactive architecture experience
• Technical leadership or mentorship of engineering teams
• Strong grounding in algorithms, design patterns, and software craftsmanship

What we offer

• Competitive salary with performance-based bonus
• Flexible remote or hybrid work options
• Private health insurance including family coverage
• Travel and meal allowance
• Continuous learning support including online training platforms