FullStack Engineer

Posted Yesterday
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Bengaluru, Bengaluru Urban, Karnataka, IND
In-Office
Senior level
Cloud • Software
The Role
Design, implement, and scale cloud-native services for contact center software. Develop front-end and back-end components, apply event-driven architectures, ensure authentication/authorization, build reusable Angular components, perform unit testing and debugging, work with RDBMS/NoSQL and cloud platforms, and collaborate in Agile/Scrum teams to deliver production-grade solutions.
Summary Generated by Built In

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. 


About Five9

Five9 is a global leader in cloud software for the enterprise contact center market, powering billions of customer interactions annually. Since 2001, Five9 has been at the forefront of the cloud revolution, helping organizations deliver exceptional customer experiences, improve productivity, and achieve measurable business outcomes. 

We are expanding our engineering and delivery teams in Bangalore and are seeking passionate professionals to help design, implement, and scale Five9’s next-generation cloud-native services.

Key Responsibilities

  • Develop information systems by designing, developing, and installing software solutions
  • Prioritize tasks effectively, communicate clearly, and deliver within stipulated timelines.
  • Apply strong analytical capabilities to implement solutions based on agreed designs.
  • Stay on the leading edge of development practices.
  • Be passionate about great technologies, especially open source.
  • Make informed decisions quickly and take ownership of services and applications at scale.
  • Work collaboratively with others to achieve goals.

Qualifications & Skills

  • 5 to 6 years of experience in the full development lifecycle.
  • Excellent understanding of front-end technologies such as Angular IO, JavaScript, HTML5, CSS3, Bootstrap 3.0, NGRX, and RXJS.
  • Strong proficiency in C#, OOPS concepts, .NET Core, Entity Framework, and ASP.NET Core, preferably with a Linux-based development background.
  • Experience working with event-driven architectures and Publisher–Subscriber patterns.
  • Hands-on experience in building reusable Angular components.
  • Expertise in responsive UI/UX design.
  • Good understanding of user authentication and authorization across multiple systems, servers, and environments.
  • Strong unit testing, debugging, and problem-solving skills.
  • Proficient in version control systems such as GIT and Azure DevOps (ADO).
  • Experience working in Agile/Scrum development environments.
  • Cloud exposure on at least one platform — Google Cloud Platform (GCP), Microsoft Azure, or Amazon Web Services (AWS).
  • Proficiency with RDBMS (SQL Server, MySQL, PostgreSQL) and NoSQL databases (MongoDB, Redis, DynamoDB).
  • Knowledge or experience in the Contact Center domain is an added advantage.
  • Exposure to Salesforce development will be an added advantage.

Why Five9

At Five9, we believe that technology is only as powerful as the people behind it. You’ll be part of a team that values collaboration, innovation, and accountability, and you’ll have the opportunity to make a meaningful impact on how global enterprises engage with their customers.

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 to 6 years of experience in the full development lifecycle
  • Experience with front-end technologies: Angular, JavaScript, HTML5, CSS3, Bootstrap 3.0, NGRX, RXJS
  • Strong proficiency in C#, OOPS concepts, .NET Core, Entity Framework, ASP.NET Core (Linux-based development background preferred)
  • Experience with event-driven architectures and Publisher-Subscriber patterns
  • Hands-on experience building reusable Angular components
  • Expertise in responsive UI/UX design
  • Good understanding of user authentication and authorization across multiple systems
  • Strong unit testing, debugging, and problem-solving skills
  • Proficient in version control systems such as GIT and Azure DevOps (ADO)
  • Experience working in Agile/Scrum development environments
  • Cloud exposure on at least one platform: GCP, Azure, or AWS
  • Proficiency with RDBMS: SQL Server, MySQL, PostgreSQL
  • Proficiency with NoSQL databases: MongoDB, Redis, DynamoDB
  • Knowledge or experience in the Contact Center domain
  • Exposure to Salesforce development

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.

  • 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.
  • 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.
  • 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

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The Company
HQ: San Ramon, California
2,427 Employees
Year Founded: 2001

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

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