Senior Full Stack Engineer

Five9•San Ramon, CA

2d•Hybrid

About The Position

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 seeking a highly skilled Full Stack Software Engineer to join our engineering team and help build and scale Five9’s global voice platform. In this role, you will work in an agile, collaborative environment to design, develop, and enhance mission critical services and user experiences across our backend and frontend systems. You will partner closely with product, architecture, and engineering leadership to deliver secure, high-performance, and reliable microservices and web applications that support millions of customer interactions worldwide. This role is ideal for an engineer who thrives in complex, cloud-native environments, embraces DevOps ownership, and enjoys solving challenging problems across multiple systems.

Requirements

5+ years of industry experience in backend development (Java).
5+ years of industry experience in frontend development (JavaScript, TypeScript, React).
Deep knowledge and experience with frameworks such as Spring.
Hands on experience in designing and implementing scalable, high performing Microservices providing REST APIs.
Strong expertise in web development technologies, including HTML, CSS, and modern front-end frameworks.
Experience working with cloud platforms such as GCP or AWS.
Expertise in server-side technologies and databases (SQL or NoSQL).
Experience working on complex problems spanning multiple products and systems.
Experience working within an Agile/Scrum team
Positive, self-motivated and enthusiastic attitude with a strong-sense of ownership.
Strong communication skills, both verbal and written.

Nice To Haves

Hands-on experience with Kubernetes for container orchestration.
Knowledge of real-time communications (SIP, RTP, etc.) is a plus.
Experience with Backbone.

Responsibilities

Be part of an agile team to develop a scalable, highly available global voice platform.
Collaborate with Product Managers, Architects, Engineering leaders and Test Engineers
Understand performance and scalability principles and apply them when developing software.
Troubleshoot and support current platform in production (we embrace DevOps)
Designs, develops, troubleshoots, debugs, and implements software code using JavaScript, Java, Spring, and related technologies.
Write unit and functional tests, be able to document and communicate clearly.

Benefits

Health, dental, and vision coverage, beginning on the first day of employment. Five9 covers 100% of the employee portion of the health, dental and vision coverage and shares a high portion of the dependent cost. We also offer Short & Long-Term Disability, Basic Life Insurance, and a 401k saving plan with employer matching.
Access to an innovative mental health support platform that offers personalized care and resources in areas such as: therapy, coaching and self-guided mindfulness exercises for all covered employees and their covered dependents.
Generous employee stock purchase plan.
Paid Time Off, Company paid holidays, paid volunteer hours and 12 weeks paid parental leave.

Stand Out From the Crowd

Upload your resume and get instant feedback on how well it matches this job.

Upload and Match Resume