Fullstack .NET Developer

Senior • Hybrid

Warsaw, Poland

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. 🍽️

Goelett

Goelett is a prominent player in the travel technology industry, specializing in developing an online booking tool utilized by corporations and large organizations worldwide. As part of the sector-leading S4BT Group, Goelett supports over 500,000 business users, facilitating thousands of bookings daily. The company is characterized by its diverse team of travel industry experts, product managers, and software engineers. Goelett is committed to innovation and excellence, focusing on creating user-centric solutions that enhance the travel booking experience. The company values continuous learning, knowledge sharing, and engineering best practices, fostering a collaborative and dynamic work environment. With a global perspective, Goelett emphasizes cultural diversity and inclusivity, aiming to make a significant impact in the travel-tech sector.