Join us in bringing joy to customer experience. Five9 is a leading provider of cloud contact center software, bringing the power of cloud innovation to customers worldwide.
Living our values everyday results in our team-first culture and enables us to innovate, grow, and thrive while enjoying the journey together. We celebrate diversity and foster an inclusive environment, empowering our employees to be their authentic selves.
We are looking for a Full Stack .NET Developer with strong expertise in Microsoft technologies and modern front-end frameworks. The role involves building scalable, high-performance web applications using ASP.NET, .NET Core, Web API, SQL, Angular, React and AWS following best engineering practices.
Key Responsibilities
- Develop and maintain web applications using ASP.NET / .NET Core / Web API / SQL
- Build responsive Single Page Applications using Angular and React
- Design and consume RESTful APIs
- Implement microservices and micro-frontend architectures
- Write clean, maintainable, and testable code using SOLID principles and design patterns
- Having experience in AWS cloud stacks, CI/CD Pipelines
- Perform unit testing and support automated testing efforts
- Collaborating with cross-functional and remote teams
- Ensure application performance, security, and scalability
Required Skills & Experience
- 5+ years of experience with Microsoft Technology Stack (ASP.NET, MVC, Web API)
- Strong hands-on experience in React and Understanding of Angular framework for migration projects.
- Experience on cloud technologies and its concepts most preferred AWS.
- Proficiency in SPA architecture
- Strong knowledge of HTML5, CSS3, JavaScript, JSON, jQuery
- Experience with Relational Databases (MS SQL Server Preferred)
- Solid understanding of Data Structures, Design Patterns, and SOLID principles
- Knowledge of multithreading and performance monitoring
- Experience with Unit Testing frameworks
- Familiarity with Git or similar version control tools
- Strong analytical, communication, and problem-solving skills
Preferred Skills
- Experience with .NET Core, .Net Framework, React, Angular, AWS, MS SQL
- Knowledge of BDD/TDD and UI test automation
- Exposure to CI/CD and DevOps tools (Docker, YAML or similar)
- Experience with application security tools
- Strong UI/UX sensibility and attention to detail
Additional Information
- Ability to work independently and in a fast-paced environment
- Flexibility to collaborate across time zones when needed
Five9 embraces diversity and is committed to building a team that represents a variety of backgrounds, perspectives, and skills. The more inclusive we are, the better we are. Five9 is an equal opportunity employer.
View our privacy policy, including our privacy notice to California residents here: https://www.five9.com/pt-pt/legal.
Note: Five9 will never request that an applicant send money as a prerequisite for commencing employment with Five9.
Skills Required
- 5+ years experience with Microsoft technology stack (ASP.NET, MVC, Web API)
- Strong hands-on experience with React and understanding of Angular
- Proficiency in Single Page Application (SPA) architecture
- Experience with relational databases (MS SQL Server preferred)
- Strong knowledge of HTML5, CSS3, JavaScript, JSON, jQuery
- Design patterns, SOLID principles, and data structures knowledge
- Knowledge of multithreading and performance monitoring
- Experience with unit testing frameworks and automated testing
- Familiarity with Git or similar version control tools
- Experience with cloud technologies (AWS preferred)
- Experience with .NET Core and .NET Framework
- Familiarity with CI/CD and DevOps tools (Docker, YAML)
- Knowledge of BDD/TDD and UI test automation
- Experience with application security tools
- Strong analytical, communication, and problem-solving skills
Five9 Compensation & Benefits Highlights
The following summarizes recurring compensation and benefits themes identified from responses generated by popular LLMs to common candidate questions about Five9 and has not been reviewed or approved by Five9.
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Healthcare Strength — Employer-paid employee premiums, multiple plan options, and broad coverage across medical, dental, vision, disability, FSAs, and EAP are emphasized as core elements of the package. These features position healthcare as a standout component of total rewards.
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Equity Value & Accessibility — Equity grants and an ESPP are highlighted as meaningful parts of total compensation. Feedback suggests these stock components can materially enhance overall pay when company performance is favorable.
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Fair & Transparent Compensation — Public job postings include salary ranges and company materials describe formal peer benchmarking of pay. These practices indicate structure and visibility around compensation decisions.
Five9 Insights
What We Do
Five9 is an industry-leading provider of cloud contact center solutions, bringing the power of cloud innovation to more than 2,000 customers worldwide and facilitating billions of customer engagements annually. The Five9 Intelligent Cloud Contact Center provides digital engagement, analytics, workflow automation, workforce optimization, and practical AI to help customers reimagine their customer experience. Designed to be reliable, secure, compliant, and scalable, the Five9 platform helps increase agent and supervisor productivity, connects the contact center to the business, and ultimately deliver tangible business results including increased revenue and enhanced customer trust and loyalty
