Sr Software Engineer - Backend Engineer | IND

Five9; Bengaluru; On-site; INR 1,800,000 - 3,200,000; Full time

Job summary

Five9 is expanding its Bangalore engineering and delivery teams and seeks a highly skilled Full-Stack Developer to design, implement, and scale cloud-native services. You will work on scalable web applications, microservices, and APIs using .NET Core, React, and modern frontend technologies.

The role requires 7+ years of experience, strong problem-solving skills, and hands-on expertise with Docker, Kubernetes, CI/CD, and cloud platforms.

Qualifications

• 7+ years of experience as a Full-Stack Developer.
• Strong experience in .NET Core and C#.
• Proficiency in React.js, JavaScript (ES6+), and TypeScript.
• Experience with RESTful APIs and Microservices architecture.
• Knowledge of SQL/NoSQL databases (SQL Server, Snowflake, MongoDB).
• Experience with Git, CI/CD pipelines, Docker, and Kubernetes.
• Familiarity with Cloud services (Azure, AWS, or GCP) is a plus.

Responsibilities

• Design, develop, and maintain microservices and APIs using .NET Core. Should have a good understanding of .NET Framework.
• Implement RESTful APIs, ensuring high performance and security.
• Optimize database queries and design schemas for SQL Server / Snowflake / MongoDB.
• Design and implement scalable microservices architecture.
• Work with Docker, Kubernetes, and CI/CD pipelines for deployment and automation.
• Ensure best practices in security, scalability, and performance.
• Work closely with UI/UX designers, backend engineers, and product managers.
• Participate in Agile/Scrum ceremonies, code reviews, and knowledge-sharing sessions.

Skills

.NET Core

C#

React.js

JavaScript

TypeScript

RESTful APIs

Microservices

SQL

NoSQL

SQL Server

Snowflake

MongoDB

Git

CI/CD

Docker

Kubernetes

Cloud Services

Azure

AWS

GCP

GraphQL

gRPC

WebSockets

OAuth

JWT

Identity Server

Serverless

Automated Testing

Tools

React.js

JavaScript

Job description

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

Overview

We are looking for a highly skilled Full-Stack Developer with expertise in .NET Core, to develop and maintain scalable web applications and microservices. The ideal candidate will have strong problem-solving skills, experience in modern software development, and a passion for creating robust, high-performance applications.

Key Responsibilities

• Design, develop, and maintain microservices and APIs using .NET Core. Should have a good understanding of .NET Framework
• Implement RESTful APIs, ensuring high performance and security
• Optimize database queries and design schemas for SQL Server / Snowflake / MongoDB

Software Architecture & DevOps

• Design and implement scalable microservices architecture
• Work with Docker, Kubernetes, and CI/CD pipelines for deployment and automation
• Ensure best practices in security, scalability, and performance

Collaboration & Agile Development

• Work closely with UI/UX designers, backend engineers, and product managers
• Participate in Agile/Scrum ceremonies, code reviews, and knowledge-sharing sessions
• Write clean, maintainable, and well-documented code

Qualifications & Skills

• 7+ years of experience as a Full-Stack Developer.
• Strong experience in .NET Core, C#.
• Proficiency in React.js, JavaScript (ES6+), TypeScript.
• Experience with RESTful APIs, Microservices architecture.
• Knowledge of SQL / NoSQL databases (SQL Server, Snowflake, MongoDB).
• Experience with Git, CI/CD pipelines, Docker, and Kubernetes.
• Familiarity with Cloud services (Azure, AWS, or GCP) is a plus.
• Strong debugging and troubleshooting skills

Nice to Have

• Experience with GraphQL, gRPC, or WebSockets
• Knowledge of authentication/authorization frameworks (OAuth, JWT, Identity Server)
• Exposure to serverless architecture and cloud-native best practices
• Background in automated testing (unit, integration)

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.