Fullstack .NET Developer

In Goelett, we are an extraordinary mix of travel industry experts, product managers, and software engineers, building a successful online booking tool used by corporations and large organizations around the globe. 🌍✈️

As part of the sector-leading S4BT Group, we support 500k+ business users making thousands of bookings every day.

We are now looking for a Full Stack .NET Developer to join our Data & Invoicing Team — someone with a background in system & integration analysis, eager to take on a dynamic role focused on requirements analysis, solving system challenges, and improving product capabilities. 🚀

Work model: hybrid — 3 days per week from our office. 🏢💻 (Warsaw, Aleje Jerozolimskie 180)

⭐ What you will be doing:

• Develop clean, robust code in C# within cloud-native environments. ☁️

• Design, build, and maintain both backend and frontend components.

• Test and deploy systems and applications on Azure.

• Monitor and optimize performance, resolving issues as they arise. 🔧

• Act as a system expert and provide technical support to internal teams.

• Work in a Kanban squad with strong focus on QA and continuous integration.

• Share knowledge, learn continuously, and champion engineering best practices. 📚

• Turn data into valuable insights. 📊

• Ensure accurate invoicing for the organization. 💼

🌟 What we're looking for:

• 5+ years of experience in software development using C#, cloud architectures, and related technologies.

• 3+ years working with SQL Server.

• Experience with frontend technologies such as Angular or Blazor.

• Willingness to work with F# and Python is a plus. 🐍

• Strong grasp of software engineering principles and API design.

• Proven experience with containerized applications on Microsoft Azure.

• Deep knowledge of clean code, clean architecture, and SOLID principles.

• Familiarity with AI tools to enhance development workflows is an advantage. 🤖

• Experience with Agile/Kanban and collaborative development practices.

• Professional English proficiency.

🎁 What we offer:

• A truly global perspective – work daily with colleagues from diverse cultures and backgrounds.

• Real impact – shape the future of one of the most user-centric travel-tech companies. Your ideas will reach thousands worldwide. 🌐

• Medical care – supporting your well-being.

• Multisport card – keep your body as active as your mind. 💪

• Extra days off – enjoy your birthday with a paid day off and another day for volunteering. 🎉

• Language courses – grow your communication skills in our multicultural environment.

• Team integrations & fun events. 🎈

• Lunch vouchers – enjoy delicious breaks on us. 🍽️