Senior Backend Developer

Senior Backend Developer at BRAINR

Join BRAINR, an AI-powered factory management software platform for the food industry.

Our mission is to build the intelligent brain for every food factory. We bring together machines, sensors, software, and people. We are profitable from day one and recently secured a
- breaking €11M seed round, the largest in Portugal’s history, to expand globally.

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 product, frontend, design, and QA teams to deliver features end‑to‑end.
• Apply software design principles (SOLID, DRY) and modern architectures (Domain‑Driven, Event‑Driven).
• Contribute to improving engineering practices, code quality, and technical documentation.
• Stay up to date with industry trends and bring innovative ideas to the team.

Minimum Requirements

• 5+ 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.

Where we work

Hybrid model: primarily on‑site at our headquarters in Leiria, with flexibility to work remotely up to 3 days per month.

Benefits

• Extra 2 days of paid time off.
• Corporate discount programs and special offers.
• Learning and Development Program.
• Access to the latest AI tools and best‑in‑class tech stack.
• Team‑building activities at least twice per year.
• Flexible working hours.
• On‑site gym facility.
• Free lunch at the office restaurant every day.

Hiring Process

1. Application review
2. Intro call with People team (30 min)
3. Technical assessment
4. Technical interview
5. Final chat with team members or leadership

Seniority level

Mid‑Senior level

Employment type

Full‑time

Job function

Information Technology