Apply for Five9 Off Campus Drive 2026! Hiring Software Engineer Job in Bangalore for VoIP call control and scalable voice platforms. Java/Kotlin, OOP, SIP/WebRTC experience required. Open for BE/BTech with 2 years development experience.
Candidates who are interested in Five9 Off Campus Drive Job Openings can go through the below to get more information.
Key Job details of Software Engineer job
Company: Five9
Qualifications: BE/BTech
Experience Needed: 2 years
Location: Bangalore
Job Description
This role aims to identify customers’ business problems, master the VoIP (Voice over IP) domain, implementation of advanced features and through continuous enhancement of Five9’s call control services, help realize customer value and provide ongoing support. This role requires an excellent understanding of Object Oriented Programming, VoIP technologies and involves close collaboration with other teams in Five9 organization.
Key Responsibilities:
- Manage the day-to-day operational and tactical aspects of multiple customer services issues and escalations.
- Effectively communicate plans, progress and status.
- Implement, troubleshoot, and support the Five9 Voice call control & configuration services.
- Be part of an agile team to develop a scalable, highly available global voice platform.
- Understand performance and scalability principles and apply when developing software.
Required Skills and Qualifications:
- 2 years of industry experience in software development.
- Hands on experience with Object Oriented Programming using Java and Kotlin.
- Experience with VoIP technologies and their integration.
- Experience in troubleshooting tools and good debugging skills.
- Strong analytical and fault-finding skills and an ability to work under pressure
- 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.
- Bachelor’s degree (or equivalent /above) in relevant discipline.
Good to have:
- Good understanding of VoIP protocols like SIP, RTP, RTCP, WebRTC.
- Experience with MySQL or PostgreSQL.
- Experience with Contact Centre, IVR, Virtual Agents and telecommunications service providers is advantageous.
Other requirements
- This position requires the ability to be On Call (roster based).
- This position requires to be flexible to work with people from both US and Australia at least.
How to Apply Five9 Off Campus Drive 2026
Click on Apply to Official Link Five9 Below – You will go to the Company Official site
First of all Check, Experience Needed, Description and Skills Required Carefully.
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Interview Questions
- How do you design a scalable VoIP call control service using Java/Kotlin?
- Explain SIP protocol and how it handles call setup/signaling.
- What are RTP/RTCP, and how do they support real-time media?
- How would you implement WebRTC integration for browser-based calling?
- Describe troubleshooting a VoIP call drop or latency issue.
- How do you ensure high availability for global voice platforms?
- Explain multi-threading or async programming for concurrent calls.
- What performance/scalability principles apply to VoIP systems?
- How do you collaborate in agile teams for feature delivery?
- Describe debugging production VoIP issues under pressure.
Selection Process
- Online application via Five9 Careers portal.
- Technical screening on Java/Kotlin and VoIP fundamentals.
- Technical interview(s) on OOP, VoIP protocols, and system design.
- Final behavioral round on communication and ownership (on-call willingness).
Pro Tip
- Review SIP/RTP/WebRTC protocols and build a simple Java/Kotlin VoIP client/server demo to discuss architecture and troubleshooting.
- Prepare production incident stories and highlight agile collaboration experience, as Five9 emphasizes operational excellence and on-call readiness.