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Senior .NET Core Developer

Holisto

Hybrid
Warsaw, Poland
Full-time
Senior
4+ yrs
Salary not listedPosted 1mo ago

Real job — pulled straight from Holisto’s careers page · Verified July 6, 2026 · No reposts.

Job description

Holisto is hiring a Senior .NET Core Developer — a full-time, based in Warsaw, Poland role. Apply directly on Holisto's careers page below.

Senior .NET Core Developer - Suppliers Team

Location: trivago innovation center - Warsaw, Poland (PL)

Experience Level: Senior

Description

trivago innovation center (formerly Holisto Ltd.) is looking for a passionate and seasoned Senior .NET Core Developer who will join our ‘Suppliers’ 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.

The position is intended for both men and women.

Hybrid work model. Arrival at the office in the City center, Warsaw, twice a week - Mandatory.


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

a. Roll up your sleeves attitude.

b. Ability to excel in a rapidly changing environment.

c. Outstanding teamwork skills

About the Company

About trivago Innovation Center (formerly Holisto)

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

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Frequently asked questions

What skills are required for Senior .NET Core Developer at Holisto?

The required skills for Senior .NET Core Developer at Holisto include: .NET, C#, SQL Server, Redis, Elasticsearch, Kubernetes, CI/CD.

What is the seniority level for Senior .NET Core Developer at Holisto?

Senior .NET Core Developer at Holisto is a Senior level position.

How do I apply for Senior .NET Core Developer at Holisto?

You can view the full description and apply for Senior .NET Core Developer at Holisto on EchoJobs: https://echojobs.io/job/holisto-senior-net-core-developer-suppliers-team-nhhhf.