Sr. Java and .NET Developer

Job Title - Sr. Java and .NET DeveloperLocation - 100% RemoteDuration - 6+ monthsInterview - VideoJob DescriptionKnowledge, Skills, AbilitiesStrong knowledge of enterprise software development principles, object-oriented design, and design patterns. (6+ Years experience)Knowledge of Java enterprise application development, including Spring Framework/Spring Boot and RESTful services.Knowledge of Microsoft .NET technologies, including C#, .NET 8/10+, ASP.NET Core, Web API, and MVC.Knowledge of modern web application architecture and client/server development.Knowledge of application security principles, including authentication, authorization, encryption, secure coding practices, and OWASP Top 10 vulnerabilities.Knowledge of payment processing integrations and secure handling of sensitive financial data.Knowledge of relational database design, SQL development, and performance optimization.Knowledge of cloud-based application deployment and modernization strategies (preferably Microsoft Azure).Knowledge of source control, CI/CD pipelines, and DevSecOps practices.Experience using AI-assisted development tools such as GitHub Copilot, OpenAI Codex, or Claude Code.Knowledge of software development lifecycle (SDLC), Agile methodologies, and software testing practices.Design and develop secure REST APIs and web services.Implement security enhancements including authentication, authorization, input validation, encryption, logging, and vulnerability remediation.Produce technical documentation and implementation plans.Maintain high-quality coding standards and attention to detail.Work in a security-conscious environment handling public-facing applications.Desirable QualificationsCandidates possessing one or more of the following qualifications are highly desirable:Experience integrating payment gateways or payment processing applications.Familiarity with PCI DSS, NIST Cybersecurity Framework, or OWASP Application Security Verification Standard (ASVS).Excellent written and verbal communication skills.Demonstrated ability to work independently while collaborating effectively within a multidisciplinary development team.Preferred Technical StackJava 11/17+, Spring BootC#, .NET 8/10+, ASP.NET CoreREST APIsSQL Server and OracleHTML5, JavaScript, CSSGitAzure DevOpsMicrosoft AzureOAuth2 / OpenID Connect / Microsoft Entra IDOWASP Secure Coding PracticesSonarQube, Checkmarx, Fortify, or similar security analysis toolsCI/CD pipelines Job Responsibilities Core Qualifications &ExperienceSenior-Level Development: 6+ years of experience in enterprise software development, object-oriented design, and architectural design patterns.Full-Stack Proficiency: Strong understanding of modern web application architecture and client/server development.Java Ecosystem: Hands-on experience with enterprise Java application development, including Spring Framework, Spring Boot, and RESTful services..NET Ecosystem: Proficiency with Microsoft .NET technologies, including C#, .NET 8/10+, ASP.NET Core, Web API, and MVC.Database Design: Strong background in relational database design, SQL development, and performance optimization.Cloud & DevOps: Familiarity with cloud-based application deployment, architecture modernization strategies (ideally Microsoft Azure), source control, CI/CD pipelines, and DevSecOps practices.AI-Assisted Development: Experience leveraging modern AI-assisted development tools (e.g., GitHub Copilot, OpenAI Codex, or Claude Code).Development Methodologies: Thorough understanding of the Software Development Lifecycle (SDLC), Agile practices, and software testing methodologies. Security & Compliance FocusApplication Security: Deep understanding of secure coding practices, authentication, authorization, encryption, and the OWASP Top 10 vulnerabilities.Secure API Development: Proven ability to design and develop secure REST APIs and web services.Vulnerability Remediation: Experience implementing robust security enhancements, including input validation, data encryption, secure logging, and patch remediation.Security-Conscious Environments: Proven ability to maintain strict attention to detail and high-quality coding standards when developing high-traffic, public-facing applications.Key ResponsibilitiesDesign, build, and optimize enterprise-grade APIs and web applications.Produce clear, concise technical documentation and architectural implementation plans.Collaborate effectively within a multidisciplinary development team while managing independent deliverables. DesirableQualificationsPayment Systems: Experience integrating secure payment gateways, payment processing applications, and handling sensitive financial data.Security Compliance: Familiarity with industry standards such as PCI DSS, the NIST Cybersecurity Framework, or the OWASP Application Security Verification Standard (ASVS).Communication: Excellent written and verbal communication skills. Preferred Technical StackBackend: Java 11/17+ (Spring Boot), C# (.NET 8/10+, ASP.NET Core)Frontend: HTML5, JavaScript, CSSDatabase: SQL Server, OracleAPIs & Security: REST APIs, OAuth2, OpenID Connect, Microsoft Entra ID, OWASP Secure Coding PracticesTools & DevOps: Git, Azure DevOps, Microsoft Azure, CI/CD pipelinesSecurity Analysis: SonarQube, Checkmarx, Fortify, or similar automated security analysis tools