Software Backend Developer (.Net)

Net

Software Backend Developer (.Net)

Net
Al. Jerozolimskie 180, Warszawa

Goelett

Full-time
Any
Mid
Hybrid

Job description

In Goelett, we are an extraordinary mix of travel industry experts, product, and software engineers, developing a successful online booking tool for corporations and large organizations. Today, as a part of the sector leader S4BT Group, we support 500k+ business users making thousands of bookings a day.


We are seeking a .Net Developer (Back-end) who is keen on working within a product development team, has a background in system and integration analysis, and is ready to take on a dynamic career opportunity by driving requirements analysis, resolving system issues, and enhancing product functionalities!


What you will be doing:

  • Develop clean, scalable code using . C# / .Net in Micro-service Architecture & Cloud-native.

  • Test and deploy system and apps on Azure.

  • Monitor and optimize system performance, addressing any issues as they arise.

  • Serve as an expert on the system and provide technical support to other Internal teams.

  • Work in an agile squad with strong attention to user experience, quality assurance and continuous integration.

  • Build engineering practice by learning, sharing knowledge applying best practices.

  • Work on projects which directly impact the company’s growth.


What we're looking for:

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

  • 3+ years of experience in Air development solutions.

  • Strong understanding of core software engineering principles and API design.

  • Proven expertise in implementing and managing high-performance, containerized applications at scale on Microsoft Azure.

  • Proficiency in designing and managing databases using SQL and NoSQL technologies.

  • In-depth knowledge of microservices, clean code, clean architecture, and SOLID principles.

  • Working knowledge of Angular/AngularJS is a plus.

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

  • Familiarity with Agile/Scrum methodologies and collaborative development practices.

  • Professional proficiency in English.


What we offer:

  • A truly global perspective – develop your international mindset by collaborating daily with colleagues from diverse cultures and backgrounds across the world.

  • Real impact – contribute to shaping the future of one of the most user-centric companies in the travel-tech industry. Your ideas and solutions will reach thousands of users globally.

  • Medical care – because your well-being matters.

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

  • Extra days off – celebrate your day with a paid day off for your birthday, and another to give back through volunteering.

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

  • Team integrations & fun events.

  • Lunch vouchers – enjoy your breaks with tasty meals on us.

Tech stack

    English

    C1

    Polish

    C1

    .NET C#

    advanced

    Azure

    advanced

    SQL

    advanced

    NoSQL

    advanced

    Angular

    nice to have

    AngularJS

    nice to have

Office location

Published: 21.10.2025

About the company

Goelett

Goelett’s team, composed of travel enthusiasts, product innovators, and tech experts, is committed to simplify and improve business travel with cutting-edge digital solutions. Join our dynamic team crafting a sophisticat...

Company profile