
25Friday
Software development engineer - c#/.net
Porto, Braga, Aveiro
February 22, 2026
Hybrid
36k-44k EUR
Software Development Engineer
Engineering
Location: Portugal
Work Model: Hybrid
Job type: Full-time
Stack: .NET
We are 25Friday
25Friday takes technological innovation to a next level, assuring the growth and success of both Tech Companies and Tech Talents! How do we do it? With the mastery of our people: a team gathered by some of the best technological experts! Together, they assure that we are the best technology partner to manage and develop some of the most unique technological solutions in the market.
5+ years of experience developing scalable, high-load backend systems in production environments;
Strong hands-on programming experience with C# / .NET Core;
Solid experience designing and working with microservices architectures and systems integration;
Proven background in performance optimisation and troubleshooting in high-traffic systems;
Experience working in an Agile environment (Scrum and/or Kanban);
Proactive and critical thinker who challenges solutions rather than blindly following specifications;
Enjoys integration work and understanding external partners’ data models and business processes;
Excellent communication skills, with the ability to collaborate effectively with stakeholders in the Netherlands and Portugal;
Fluency in English is mandatory.
Why you will love to work with us
- In the heart of the city of Porto, Aveiro and Braga, you'll have an amazing office with a parking lot, lots of food and equipped kitchens.
- We offer you a transport allowance and an Uber Eats weekly budget.
- Health insurance (extendable to your household without extra costs), personal time off and flexible working hours.
- Extra vacation days by longevity within the company and the possibility to work abroad for up to 6 weeks.
- You will live our culture of learning - we are committed to your development so we love to share and learn with each other, alongside an annual budget for learning and development.
- Each employee is rewarded with an Annual Bonus based on tenure.
- You can further develop your English through private lessons.
- You will emerge in a state of the art technology and exciting challenges.
- We believe in building relationships at work. That’s why we organise several team outings and happy hours moments throughout the year.
- And much more.