Senior.NET Developer - Gaming Sector

ERNI  is a Swiss Software Engineering company leader in building complex, customized software solutions. It’s more than 25 years of using technology to have a positive impact on people's lives.

We build digital solutions that connect the physical world (devices & connectivity) with the digital one (software solutions, connected, or consuming their data). Our teams are focused on prioritize the software lifecycle & to ensure that our code is both clean and secure. Our maturity in building high-impact software solutions approaches us whatever industry looking for quality and sophistication (e.g. Gaming, FMCG or Validation & Inspection..).

Our leadership in the Health-Tech (Diagnostic Medical Devices, Pharma, Health Care and more) and in all industries around Smart Devices (Robots, Cars, 3D Printers, Machinery), in a powerful combination with the way we growth people, let us create a growing, learning and challenging set up for ERNIans.

Can you imagine contributing to the gaming industry by making video games accessible worldwide? 🎮🌍

This could be the opportunity you’ve been waiting for.

At ERNI, we’re looking for a Senior .NET Backend Developer to join one of our client in the gaming sector . You’ll play a key role in building and optimizing web-based applications that make games more accessible, scalable, and engaging for millions of players worldwide. 🚀✨

At ERNI, you're part of a team, not just a project.

Even when working on-site with our clients, we make sure you stay connected and supported.

How do we ensure that? 🤔

From day one, you will have a mentor who will guide you through your onboarding and career at ERNI. With regular 1 : 1 meetings and a development plan, you’ll define your short-, medium-, and long-term goals.

What will you do?

You’ll be part of an international team developing backend components to guarantee performance, scalability, and quality. Your role will involve :

• Developing backend components for new funcionalities.
• Ensuring delivery of the highest quality in each sprint.
• Translate user stories and use cases into new functions of a web-based software product.
• Build new WebAPI methods for data consumption and presentation.
• Ensure delivery of the highest quality functionality in each sprint.
• Implement cache and optimized queries for performance management.
• Develop and maintain tests and mockups.
• Apply best practices with strong focus on usability, performance, and maintainability.

What are we looking for?

✅ At least 5 years of experience with C#.

✅ Strong knowledge of Code First (Fluent EF) , named queries , and LINQ queries .

✅ Solid experience with .NET Core 7, Git, GitLab .

✅ Deep understanding of database transactions and performance optimization .

✅ Experience with REST APIs (WebAPI) including practices like Windows Authentication, Swagger, Attributes, Interceptors.

✅ Previous experience with event-based architectures (CQS) .

✅ Strong commitment to good development practices (SOLID, TDD, BDD, KISS, Dependency Injection, Inversion of Control, Clean Code).

✅ Unit testing with xUnit, Moq .

What do we offer?

🏥 Private health and travel insurance.

💯 Full coverage for sick leave + 1 extra day off per month without medical leave.

🧘‍♀️ Free emotional, legal, and family support.

☕ Snacks, fruit, coffee, and tea at the office.

🍽️ Monthly team lunches paid by the company.

🎉 Special days like "churro therapy" or "calamari sandwich day."

🏋️‍♀️ Gym discounts + sports compensation.

🧳 Relocation bonus (up to €2,000).

💳 Flexible benefits : meals, transport, childcare, etc.

🤝 Referral bonuses : up to €6,000 per candidate and €5,000 per client.

🖥️ Remote work compensation : hardware + home office expenses.

🌴 23 working days of vacation.

🗣️ Free language courses : English, Spanish, and German.

💬 And the salary…

We will discuss it during the first call. If it’s important to you, feel free to ask!

We value diversity not only in terms of gender but also nationality, background, and skills. This diversity enriches our teams and allows us to create better solutions for our clients.  Every employee at ERNI has an equal opportunity to succeed.   Learn more about our initiatives  🔎 :

Diversity and inclusion

Are you still curious? Discover what it is to become part of ERNI :

Careers at ERNI | Work with Us (betterask.erni)

Also, if yo want to know what makes ERNI unique through the eyes of those who know it best 😎 Take a look at this video :

ERNI in One Word - YouTube

WOULD YOU LIKE TO BECOME AN ERNIan? APPLY NOW!