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Backend Developer

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Leiria, Leiria, Portugal Brainr Tempo inteiro
Description:

Hey, we're BRAINR.

Our mission is to build the intelligent brain for every food factory, with the only AI-powered factory management software for the food industry, bringing together machines, sensors, software, and people.

Profitable from day one, we've recently secured a record-breaking €11M Seed Round, the largest in Portugal's history, to take our mission global. And we're getting there, because today over 25% of all meat production in Portugal is already managed by BRAINR.

Along the way, we've been recognized as the Best Factory Digitization Solution at Food 4 Future in Spain, selected for EUROPA's 100 most promising startups, and named a Top Cloud-Based MES Solution by Manufacturing Tech Insights.

What sets us apart isn't just the tech. It's the people. Our leadership team combines deep industry know-how with world-class tech expertise, giving you the chance to learn and grow faster than anywhere else.

The mission is massive. The ambition is real. And we need talent like you to bring our vision to every food factory on earth.

The challenge

We're looking for a Backend Developer to join our team. You'll work on features that directly impact our customers, designing and evolving backend services that ensure reliability, performance, and scalability.

In this role, you won't just be building APIs or optimizing systems, you'll be collaborating closely with product managers, frontend developers, and designers to deliver end-to-end solutions that bring measurable value to food manufacturers using our platform. This is a chance to have real ownership, influence technical decisions, and shape how our MES product grows at scale.

Key Responsibilities

  • Design, develop, and maintain backend services in C# (.NET Core).
  • Implement and consume REST APIs to ensure seamless integration across systems.
  • Optimize performance, scalability, and security of cloud-based solutions.
  • Collaborate with cross-functional teams (product, frontend, design, QA) to deliver features end-to-end.
  • Apply software design principles (SOLID, DRY) and modern architectures (Domain-Driven, Event-Driven).
  • Contribute to improving our engineering practices, code quality, and technical documentation.
  • Stay up to date with industry trends and bring innovative ideas to the team.
Requirements:

What we're looking for

  • 1+ years of professional experience as a Backend Developer.
  • Strong expertise in C# (10 or higher) and .NET Core (8 or higher).
  • Experience building and maintaining RESTful APIs with ASP.NET Core.
  • Knowledge of cloud environments (Azure or AWS) and monitoring tools.
  • Solid understanding of OOP, software design principles, and distributed systems.
  • Familiarity with event-driven architectures and messaging systems is a plus.
  • Proactive, problem-solving mindset with attention to performance and security.
  • Excellent English, both written and spoken.

Why BRAINR?

In addition to our exceptional people, culture, and mission, BRAINR offers a range of benefits that make it an outstanding place to work:

Enjoy an extra 2 days of paid time off.

Savings with corporate discounts through partnerships and special offers.

Learning and Development Program.

Clear Career Plan with structured leveling and progression.

Quarterly Recognition Awards celebrating top performance and impact.

Work with the latest AI tools and best-in-class tech stack.

Multi day team-buildings at least twice per year.

Quarterly team-building activities.

Flexible working hours that fit your routine.

Budget of 3 days per month to work remotely

On-site gym facility.

Free lunch in our office restaurant every day.

Where we work

We work in a hybrid model, primarily on-site at our (Google-like) headquarters in Leiria, with the flexibility to work remotely up to 3 days per month. We believe in the power of being together - especially when building something this ambitious.

Our hiring process

  1. Application review

  2. Intro call with our People team (30 min)

  3. Technical assessment

  4. Technical interview

  5. Final chat with team members or leadership