Senior .NET Developer

BlackBelt Technology Kft; Chicago (IL); On-site; USD 90,000 - 130,000; Full time

Job summary

Join a leading technology company seeking experienced backend-focused .NET developers. In this role, you will develop cloud-native applications and enhance REST APIs while collaborating with an international, agile team. You should possess strong .NET and Azure experiences, and you'll have opportunities for growth and training.

Benefits

Growth-oriented training and certifications

Work from home flexibility

Caring culture

Qualifications

• 5–10 years of software development experience.
• Hands-on Azure experience with PaaS and FaaS components.
• Strong SQL / relational database knowledge.

Responsibilities

• Develop and maintain cloud-native applications based on .NET Core.
• Build and enhance REST APIs in a containerized Azure environment.
• Write clean, secure, maintainable code.

Skills

.NET Core

C#

SQL

Azure

Clean Code

Docker

Kubernetes

English

Education

AZ-204 certification

AZ-400 certification

Tools

SonarQube

Cypress

Job description

Join an experienced international team working on a globally used Site Rollout and Field Inventory Management platform. We're looking for strong backend-focused .NET developers (preferably senior, but experienced medior candidates are welcome) who are comfortable touching frontend tasks as well. The project is cloud-native, and English is the working language.

Responsibilities

1. Develop and maintain cloud-native applications based on .NET Core (C#, Entity Framework, SQL)
2. Build and enhance REST APIs in a containerized Azure environment (PaaS/FaaS)
3. Write clean, secure, maintainable code (Clean Code, SonarQube checks in place)
4. Collaborate on frontend tasks (React with Hooks) – not the primary focus, but openness is key
5. Work in an international, agile team with daily communication in English

5–10 years of software development experience, with a strong focus on .NET (C#, .NET Core)

Hands-on Azure experience is essential, especially with:

• PaaS and FaaS components
• AZ-204 and/or AZ-400 certification, or practical knowledge equivalent to these certs

Alternatively: commitment to quickly obtain one of these certifications with our support

Strong SQL / relational database knowledge (MS SQL)

Experience working in containerized, cloud-based environments (e.g., Docker, Kubernetes – not architecture or ops level)

Awareness of secure coding and development practices (DevSecOps mindset)

Fluent English, both written and spoken – this is the working language of the team

Nice to Have

• Experience with microservice architectures
• Familiarity with test automation tools (e.g., Cypress)
• Background in enterprise-level system integrations

Why You’ll Love Working With Us

• ???? BlackBelt team – Join a smart and skilled team where everyone’s a tech BlackBelt
• Growth-oriented – We support your development with training and certifications
• Variety – Opportunity to move between projects and Delivery Units
• WOW program – Our Wellbeing Office Way supports your health and balance
• ️ Flexibility – If you love working from home, your couch is still part of the package
• Caring culture – We’ve got your back during challenges, both personal and professional

Residence 2
1027 Budapest
Ganz utca 16. 3.emelet