0511 - Sr Full Stack .NET Developer at Workforce Source

Warsaw, Masovian Voivodeship, Poland -

Full Time

Start Date

Immediate

Expiry Date

10 Aug, 26

Salary

0.0

Posted On

12 May, 26

Experience

5 year(s) or above

Remote Job

Yes

Telecommute

Yes

Sponsor Visa

Skills

React, C#, .NET Core, JavaScript, SQL, Azure, Microservices, BFF Architecture, Event-driven Architecture, Agile, Scrum, Kanban, Relational Databases, API Design, Micro Frontends, Cloud Computing

Industry

Staffing and Recruiting

Description

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. Skills & Experience: - 5-7+ years of professional full-stack development experience, with deep expertise in React (2 years+ of experience) and C#/.NET Core - Proven ability to build high-volume, low-latency services and intuitive front-end experiences - Strong command of React UI and modern JavaScript frameworks; micro frontends and BFF architecture are a plus - Solid understanding of relational databases and SQL - Experience designing for security, scalability, performance, and reliability - Familiarity with event-driven architecture, APIs, and microservices - Agile development experience (Scrum/Kanban) - Skilled in communicating with product and technical teams to translate requirements into clean, scalable solutions - Experience building cloud-based solutions, preferably on Azure - BS/MS in Computer Science, Engineering, or related technical field - Preferred: Familiarity with life sciences or healthcare data - Upper-intermediate English skills or above (English is the primary language of communication in the company) Responsibilities: - Design and architect React-based frontends and supporting microservices - Collaborate with product and business teams to iterate quickly on UI features and functionality - Continuously explore new technologies to enhance our front-end stack and cloud-based deployments - Champion user experience, code quality, and front-end performance - Participate in code reviews and mentor junior developers - Contribute to product strategy through design input, roadmap discussions, and technical innovation - Propose modern solutions to complex business problems using the latest in React and .NET technologies 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

Responsibilities

Design and architect React-based frontends and supporting microservices while collaborating with product teams to iterate on UI features. The role involves mentoring junior developers and proposing modern technical solutions to complex business problems.