Freelance .NET Full-Stack Developer (.NET Core & SQL)

Company Description ThreatXIntel is a startup cybersecurity company committed to protecting businesses and organizations from cyber threats. Specializing in services such as cloud security, web and mobile security testing, and DevSecOps, ThreatXIntel delivers tailored, affordable solutions for diverse client needs. With a proactive approach to identifying vulnerabilities, the company continuously monitors and tests digital environments to safeguard its clients assets. ThreatXIntel's mission is to provide accessible, high-quality cybersecurity services, enabling businesses to focus on growth with peace of mind. Role Description We are seeking a skilled .NET Full-Stack Developer to design, build, and maintain scalable web applications using .NET and .NET Core technologies. The role involves developing backend APIs, integrating frontend components, working with relational databases, and contributing to CI/CD pipelines to deliver reliable, high-performance applications. The ideal candidate is hands-on, delivery-oriented, and comfortable collaborating with cross-functional teams in an Agile environment. Key Responsibilities Design, develop, and maintain backend APIs and services using .NET and .NET Core Integrate frontend components with backend logic and SQL databases Collaborate with UI/UX designers, product managers, and engineers to deliver business solutions Write clean, testable, and well-documented code Implement and maintain CI/CD pipelines for automated build and deployment Optimize applications for performance, security, and scalability Troubleshoot and debug issues across development and production environments Participate in code reviews and contribute to engineering best practices Support and mentor junior developers when required Required Skills & Experience 3–5 years of hands-on experience as a .NET Full-Stack Developer Strong proficiency in .NET Core and C# Solid experience working with SQL databases Experience building RESTful APIs and working with microservices architectures Familiarity with Git or other version control systems Experience working in Agile/Scrum environments Strong problem-solving, debugging, and communication skills Nice to Have Experience with frontend technologies: HTML, CSS, JavaScript Exposure to modern frontend frameworks such as React or Angular Experience with CI/CD tools (Jenkins, Docker, GitLab CI, Maven) Familiarity with JIRA, Confluence , and Agile project tools Good understanding of HTML5 and CSS3 Ideal Candidate Profile Hands-on full-stack developer with strong backend focus Comfortable working independently in a freelance engagement Delivery-focused with attention to code quality and performance Strong collaborator with clear communication skills