Staff Software Engineer

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. 

Location: Bangalore or Chennai, India (Hybrid)

Five9 is a leading provider of 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 team in India (Bangalore or Chennai) and are seeking a Staff Software Engineer to help design, implement, and scale Five9's next-generation cloud-native services. This role is ideal for engineers who thrive on hands-on coding, technical depth, and building complex distributed systems.

• Design, develop, and optimize high-performance microservices using Java and Spring Boot.

• Write clean, maintainable, and testable code, with a strong focus on scalability, reliability, and performance.

• Take ownership of services end-to-end — from design and implementation to deployment, monitoring, and ongoing operations.

• Collaborate with architects and senior engineers on system design, technical reviews, and problem-solving.

• Ensure services meet SLAs, performance metrics, and security standards.

• Contribute to improving CI/CD pipelines, automation, and observability to reduce manual effort and improve service reliability.

• Provide technical guidance and mentorship to mid-level and junior engineers through code reviews, pairing, and knowledge sharing.

• Stay current with evolving technologies and help evaluate and adopt tools that strengthen our platform.

Core Technical Skills (Critical for Success)

• Java & Microservices Development: 7–10 years of hands-on experience building backend services with Java and Spring/Spring Boot. Candidates must be highly proficient in writing scalable, maintainable, and efficient code.

• Cloud-Native Architecture: Strong experience working with GCP (GKE, Pub/Sub, BigQuery, CockroachDB, Redis) is essential to build and operate distributed systems at scale.

• Problem-Solving & Debugging: Proven ability to dive deep into complex production issues, troubleshoot effectively, and ensure service reliability.

Essential Supporting Skills

• Distributed System Design & Scalability: Understanding of designing cloud-native microservices and handling performance, reliability, and scalability concerns.

• Databases & Caching Strategies: Practical experience with SQL and NoSQL databases, as well as caching techniques, to optimize service performance.

• Product Architecture Awareness: Awareness of how backend services fit into the overall product ecosystem and impact user experience.

Valuable Additional Skills (Enhance Effectiveness)

• Kubernetes & Containerization: Experience with containerized deployments and CI/CD pipelines (GitLab or similar) will accelerate your ability to manage services efficiently.

• System Design & Algorithms: Strong grasp of system design, data structures, and algorithms will help in building high-performance systems.

• Exposure to voice and telephony systems (SIP, RTP, IVR, call routing) or real-time communication platforms.

• Experience in latency-sensitive, high-throughput systems.

• Familiarity with Looker, analytics pipelines, and large-scale reporting systems.

• Knowledge of Agile methodologies, Jira, Confluence, and end-to-end testing practices.

• Languages & Frameworks: Java, Spring, Spring Boot

• Cloud & Infrastructure: GCP (GKE, Pub/Sub, BigQuery, CockroachDB, Redis), Kubernetes

• DevOps & CI/CD: Git, GitLab CI/CD

• Collaboration & Documentation: Swagger, JIRA, Confluence

• Hardware: Apple MacBook options available

As a Staff Engineer at Five9, you will work on core backend services that power our global cloud contact center platform. You'll tackle hard engineering problems at scale, remain deeply involved in coding, and contribute to a culture that values craftsmanship, innovation, and technical excellence — while mentoring others and shaping best practices along the way.

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:   

Note: Five9 will never request that an applicant send money as a prerequisite for commencing employment with Five9.