Senior Software Engineer (Kotlin/Java)

Vonage · Work from Home - Spain · Remote

Posted 8/24/2026 · last confirmed live 8/26/2026

Join Vonage and help us innovate cloud communications for businesses worldwide! Vonage Communications APIs:  As an emerging leader in the $10B+ communications API market, we empower global brands to connect better with their customers, employees, and partners through transformative communications experiences. For example, Vonage API solutions empower organizations to build their custom omnichannel communications structure. This allows them to reach and engage customers on their preferred schedule and channel — including voice, video, and messaging. Think of a rideshare service instantly connecting with customers, hospital staff conducting remote monitoring, customers verifying their identity before completing a purchase, AI virtual agents servicing customers around the clock, and much more. Why this role matters: The Engineering team at Vonage is a group of talented engineers working on complex challenges associated with high-performance distributed systems and processing large volumes of data in real time. We are looking for Software Engineers to join our dynamic development team. As a key contributor, you will play a vital role in building out our RCS channel functionality. Your key responsibilities: Build high-throughput, low-latency applications to meet communication use cases. Create scalable microservices that will help support our impressive growth Write efficient and scalable code in well-tested systems Collaborate with cross-functional teams to ensure seamless integration and functionality. Propose scalable, maintainable and cost-effective solutions Estimate the effort required to develop and implement new features Develop and execute effective testing strategies to ensure software quality and reliability What you'll bring: Excellent software engineering skills in Kotlin/Java for backend services A strong focus on testing, with a customer-first mindset Experience with multi-threaded architectures, web services, and caching. Practical experience in deploying code in a modern programming environment using tools such as Docker and Kubernetes Willingness to learn and adapt to new technologies and programming languages. The Stack Language - Kotlin primarily with Spring Boot Reactive Cloud - AWS primarily Monitoring and observability Kafka and Redis Docker and Kubernetes How you’ll benefit: Private Medical Insurance Group Pension Plan Life Insurance and Group Personal Accident Ericsson Care Line (EAP) Discretionary Time Off (DTO) Volunteer Time (VTO) #LI-AR1 There’s no perfect candidate. You don't need all the preferred qualifications to make a valuable impact on our team. Our employees and customers come from diverse backgrounds, so if you're passionate about what you could achieve at Vonage, we'd love to hear from you. To learn how we process your personal data during the recruitment process, please refer to our Privacy Notice .  Who we are: Vonage is a global cloud communications leader. And your talent will further help brands - such as Airbnb, Viber, WhatsApp, and Snapchat - accelerate their digital transformation through our fully programmable-based unified communications, contact center solutions, and communications APIs. Ready to innovate? Then join us today. Note: The purpose of this profile is to provide a general summary of essential responsibilities for the position and is not meant as an exhaustive list. Assignments may differ for individuals within the same role based on business conditions, departmental need or geographic location. 

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