Our client is a Chicago-headquartered IT consulting firm founded in 2008, with team members based across four continents and nine countries. Joining them means working alongside a globally distributed team of engineers, consultants, and technology specialists on projects for enterprise clients, including 17 Fortune 100 companies, multiple Fortune 500 organizations, and many household names recognized worldwide. Project work spans industries such as engineering, transportation, manufacturing, healthcare, insurance, finance, and retail, and falls under service areas including Digital Strategy, Marketing & Data Execution, Software Experience Development, Quality Engineering, Security, and AI solutions. Over its 16+ year history, our client has been recognized by the Department of Defense, featured in a published Adobe Systems case study, and honored with the AT&T Crystal Award and the Illinois Hiring Heroes award for its commitment to veteran hiring. Consultants work across on-site, remote, and hybrid engagements, giving employees exposure to a broad range of technologies, clients, and industries throughout their careers. The customer is a global contract research organization (CRO) that provides clinical trial management and drug development services to pharmaceutical, biotechnology, and medical device companies. They handle the full spectrum of clinical research, from study design and patient recruitment to data management and regulatory submissions, helping companies bring new therapies to market faster and more efficiently. We are seeking a Backend .NET Developer with strong expertise in modern .NET technologies to design and build scalable, secure, and high-performing applications. The role requires someone who can quickly integrate into delivery teams and contribute with minimal ramp-up time. Key Responsibilities: - Develop and maintain backend services using .NET and .NET Core - Design and build RESTful APIs to support application functionality - Partner with cross-functional teams in an Agile environment to deliver high-quality solutions - Ensure application performance, scalability, and security best practices are followed - Collaborate on system design, code reviews, and continuous improvement initiatives Required Qualifications: - Strong hands-on experience (5 years+) with .NET and .NET Core - Proven expertise in REST API development - Solid experience with SQL Server and database design - Good understanding of authentication and authorization in enterprise applications - Experience working within Agile teams - Ability to contribute effectively with limited onboarding time - Upper-intermediate English skills or above (English is the primary language of communication in the company) Preferred Qualifications: - Experience with Microsoft Azure and cloud-based development Benefits and working conditions: - 100% remote job - Long-term employment - Well-known customer with modern technologies - Competitive salary - Great international team (from the US, England, Poland, India) - Flexible working hours with 4 hours overlap with the US-based team (9 am – 1 pm EST) - 10 days vacation, 5 sick days, 6 US-based holidays