.NET Core Developer

Join a global B2C travel-tech team and build high-scale solutions that power smarter, more personalized hotel booking experiences for millions of users.

RESPONSIBILITIES

• Design and develop a new architecture in .NET 8 for high-scale products.
• Build and evolve platform infrastructure used by millions of travelers ежедневно.
• Deliver end-to-end solutions: design, implementation, deployment, and production support.
• Collaborate with the team in a culture of transparency, continuous improvement, and innovation.
• Ensure performance, reliability, and scalability in large-scale production environments.
• Maintain high engineering standards: clean code, testing, documentation, and best practices.

REQUIREMENTS

• 4–5+ years of commercial experience with .NET Core / C#.
• Strong CS fundamentals: OOP, design patterns, algorithms, data structures.
• Hands-on experience building and deploying end-to-end solutions for internet-scale problems.
• Good understanding of SQL Server and Redis.
• Experience with containers and Kubernetes.
• Strong communication skills, initiative, and teamwork mindset.
• High level of English (written and spoken).
• Education: CS/Engineering degree or equivalent practical experience.

NICE TO HAVE

• Experience with NoSQL (e.g., Elasticsearch).
• Experience with CI/CD.
• Background in large-scale production environments.

WHAT DO WE OFFER ON THIS PROJECT?

• Cooperation based on a B2B contract.
• Hybrid work from Warsaw (2 times a week in the office).
• The support of a dedicated mentor. In the relationship, we focus on direct communication. When you join speedapp, you will be put in touch with a dedicated mentor who will make sure that you enjoy working with us and with the client.
• Events and integration meetings, as well as participation in various initiatives, e.g., sports.
• Access to the benefits offering (medical care, life insurance, Multisport card).

WHAT DOES THE RECRUITMENT PROCESS LOOK LIKE?

Application: Apply and submit your CV.

After the application review, the recruiter will contact selected candidates by phone.

Screening: Have a conversation with a speedapp recruiter about your experience.

Next steps: The speedapp recruiter will explain the recruitment process for the specific position.

The speedapp recruiter will stay in touch with you throughout the entire process.

ABOUT SPEEDAPP

At speedapp, we believe that an organization is only as good as the people who make it up. We are a team of IT experts and other professionals working for our clients around the world (including Israel, Austria, USA). We go far beyond the HR category. We build IT teams and also help manage them.

👉 10 years of experience

👉 +100 clients worldwide 

+300 hires per year

💎 We have won the prestigious "Forbes Diamonds" award four times (2022, 2023, 2024, 2025). We are a member of the European Fast Growth Icons network and FinTech Poland. We are ranked 18th among the 100 fastest growing companies 2023 by Clutch.

DO YOU HAVE ANY QUESTIONS?

Contact the recruiter responsible for this process directly.

Adrianna Rudzka
Junior IT Delivery Consultant
adrianna.rudzka@speedapp.pl
+48 884 271 647