Senior .NET Core Developer - Warsaw

Holisto; Warszawa; On-site; PLN 211,327 - 295,857; Full time

Job summary

A global travel technology company is seeking a Senior .NET Core Developer to lead the development of pioneering solutions in a high-scale environment. You will leverage cutting-edge technologies and collaborate within a dynamic team. Candidates should possess strong experience in .NET Core and a foundation in computer science. Excellent communication skills and a proactive attitude are essential. Full-time role based in Warsaw, Poland.

Qualifications

• 4-5 years of experience in .NET Core / C#.
• Hands-on experience in designing end-to-end solutions.
• Good understanding of SQL Server and Redis.

Responsibilities

• Design and develop infrastructure for high-scale products.
• Maximize technology to meet business needs.
• Work in a fast-paced environment adapting to new technologies.

Skills

Object-oriented design

Design patterns

Algorithms

Data structures

Development in .NET Core / C#

SQL Server

Redis

NoSQL databases

Containers

Kubernetes

CI/CD

Communication (English)

Job description

trivago innovation center (formerly Holisto Ltd.) is looking for a passionate and seasoned Senior .NET Core Developer to join our Engineering team and lead our disruptive product.

About the role

• Our culture is based on leveraging cutting‑edge technologies while encouraging innovation and creativity.
• In this position, you will design and craft the infrastructure and platform to be used by millions of travelers worldwide every day.
• We believe in full transparency, continuous improvement, innovation, and maximizing technology to meet our needs.
• Be part of the team that will design and build our new architecture in .NET 8 technology to support our high‑scale products.

Requirements

• A solid foundation in computer science and strong competencies in object‑oriented design, design patterns, algorithms, and data structures, with solid development experience in .NET Core / C#, at least 4–5 years’ experience.
• Thrive in a fast‑paced environment, able to adapt and learn new technologies quickly.
• Hands‑on experience designing, developing, and deploying end‑to‑end solutions for internet‑scale problems.
• Good understanding of SQL Server and Redis.
• Experience with NoSQL databases (like Elasticsearch) is an advantage.
• Experience with large‑scale production environments.
• Excellent communication skills, initiative, and teamwork.
• Experience with containers and Kubernetes is an advantage.
• Working with CI/CD is an advantage.
• High level of communication skills (written and verbal) in English.

Character and Attitude Figure

• Excellent verbal and written communication skills, with a strong ability to interact with and influence organization leadership teams.
• Startup mentality – a must.
• Roll up your sleeves attitude.
• Ability to excel in a rapidly changing environment.
• Outstanding teamwork skills.

About the Company

We’re part of trivago N.V., 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.

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.

Join Israel’s #1 fastest growing company (Globes 2022) https://en.globes.co.il/en/article-growing-companies-1001431118

https://www.calcalistech.com/ctechnews/article/0qtr82cpi

Seniority level

Mid‑Senior level

Employment type

Full‑time

Job function

Engineering and Information Technology

Industries

Hospitality