Jobs and Careers
HO
Senior .NET Core Developer - Warsaw
HOLISTOWarszawa, Województwo mazowieckie, PL, Polandfull_timeVerifiedPosted 16 Nov 2025
About the role
<h3>Description</h3>
<p><strong>trivago innovation center (formerly Holisto Ltd.) </strong>is looking for a passionate and seasoned <strong>Senior .NET Core Developer</strong> to join our Engineering team and lead our disruptive product.</p>
<h3>About the role</h3>
<ul><li>Our culture is based on leveraging cutting-edge technologies while encouraging innovation and creativity.</li><li>In this position, you will design and craft the infrastructure and platform to be used by millions of travelers worldwide every day.</li><li>We believe in full transparency, continuous improvement, innovation, and maximizing technology to meet our needs.</li><li>Be part of the team that will design and build our new architecture in <strong>.NET 8 </strong>technology, to support our high-scale products.</li></ul>
<h3>Requirements</h3>
<ul><li>A solid foundation in computer science and strong competencies in object-oriented design, design patterns, algorithms, and data structures, with solid development experience in <strong>.NET Core / C#</strong> - <strong>At least 4-5 years’ experience</strong>.</li><li>Thrive in a fast-paced environment, able to adapt and learn new technologies quickly.</li><li>Hands-on experience designing, developing, and deploying end-to-end solutions for internet-scale problems.</li><li>Good understanding of SQL Server and Redis.</li><li>Experience with NoSQL databases (like Elasticsearch) is an advantage.</li><li>Experience with large-scale production environments.</li><li>Excellent communication skills, initiative, and teamwork.</li><li>Experience with containers and Kubernetes is an advantage.</li><li>Working with CI, CD is an advantage.</li><li>High level of communication skills (written and verbal) in English.</li></ul>
<h3>Character and Attitude Figure</h3>
<ul><li>Excellent verbal and written communication skills, with a strong ability to interact with and influence organization leadership teams.</li><li>Startup mentality - A must</li></ul><p> a. Roll up your sleeves attitude.</p><p> b. Ability to excel in a rapidly changing environment.</p><p> c. Outstanding teamwork skills</p>
<h3>About the Company</h3>
<p><strong>About trivago Innovation Center (formerly Holisto)</strong></p><p>We’re part of <strong>trivago N.V.</strong>, a global B2C travel-tech company headquartered in Düsseldorf, Germany. At trivago Innovation Center, we harness the power of award-winning AI and machine learning technologies to make hotel bookings smarter, more affordable, and perfectly tailored to each traveler.</p><p>Fueled by our passion for travel and technology, we’ve spent years researching, developing, and refining solutions that help millions of users save money - every single time they book.</p><p>Join Israel’s #1 fastest growing company (Globes 2022) <a href="https://en.globes.co.il/en/article-growing-companies-1001431118" rel="noopener noreferrer" target="_blank">https://en.globes.co.il/en/article-growing-companies-1001431118</a></p><p><a href="https://www.calcalistech.com/ctechnews/article/0qtr82cpi" rel="noopener noreferrer" target="_blank">https://www.calcalistech.com/ctechnews/article/0qtr82cpi</a></p>
Apply for this role
Generate a tailored application kit with a matched cover letter, interview prep, and CV highlights — in under 60 seconds.
Apply Now →Generate Application KitFree account required — sign up in 30s