Job Description

Senior .NET Developer (Backend)

Role: Senior Developer (.NET/C#), Pool Based Wagering

Location: Vienna, Austria

Employment Type: Full-time (Zensar Technologies)

About the Role:

Zensar Technologies is seeking an experienced Senior Backend Developer to join our engineering team in Vienna. You will be working on a core betting platform for a global leader in the sports betting and gaming industry.

This role focuses specifically on the Pool Based Wagering stream. You will be responsible for developing and optimizing high-performance transaction engines that calculate pool dividends and process complex bets in real-time. This is a high-concurrency environment where accuracy and low latency are non-negotiable.

• Core Development: Design, build, and maintain scalable backend services using NET Core (C#) for large-scale pool wagering systems.
• High-Volume Processing: Develop solutions to handle massive spikes in transaction volume during major sporting events (e.g., horse racing festivals), ensuring zero downtime.
• Algorithm Implementation: Implement complex mathematical models for pool calculations (tote betting) and dividend distribution.
• Database Optimization: Write and optimize complex SQL queries to ensure data integrity and speed within a high-transaction database environment.
• System Resilience: Diagnose and resolve production issues in a distributed system architecture, focusing on fault tolerance and recovery.
• Collaboration: Work closely with Product Owners and QAs to translate betting logic into robust technical solutions.

• Primary Language: Expert proficiency in C# and the NET Framework / .NET Core
• Database: Strong experience with SQL Server or PostgreSQL, including stored procedures and performance tuning.
• Architecture: Experience with microservices, RESTful APIs, and distributed systems.
• Concurrency: Deep understanding of multi-threading, asynchronous programming, and handling race conditions.
• Tools: Familiarity with Docker, Kubernetes, and CI/CD pipelines (Azure DevOps/Jenkins).

Preferred Domain Knowledge:

• Experience in Sports Betting, High-Frequency Trading (HFT), or Fintech is strongly preferred.
• Understanding of "Pool" or "Parimutuel" betting mechanics is a distinct advantage.

What We Offer:

• The opportunity to work on systems that process millions of transactions daily.
• A collaborative environment working with a global team of experts.
• Competitive compensation and career growth opportunities within Zensar.

At Zensar, we’re “experience-led everything” We are committed to conceptualizing, designing, engineering, marketing, and managing digital solutions and experiences for over 130 leading enterprises. We are a company driven by a bold purpose: Together, we shape experiences for better futures Whether for our clients, our people, or the world around us, this belief powers everything we do. At the heart of our culture is ONE with Client - a set of four core values that reflect who we are and how we work: One Zensar, Nurturing, Empowering, and Client Focus

Part of the $4.8 billion RPG Group, we’re a community of 10,000+ innovators across 30+ global locations, including Milpitas, Seattle, Princeton, Cape Town, London, Zurich, Singapore, and Mexico City. Explore Life at Zensar and join us to Grow. Own. Achieve. Learn. to be the best version of yourself.

We believe the best work happens when individuality is celebrated, growth is encouraged, and well-being is prioritized. We are an equal employment opportunity (EEO) and affirmative action employer, committed to creating an inclusive workplace. All qualified applicants will be considered without regard to race, creed, color, ancestry, religion, sex, national origin, citizenship, age, sexual orientation, gender identity, disability, marital status, family medical leave status, or protected veteran status.