Java Software Engineer

About the role

Join Vonage to help shape cloud-based communication solutions for businesses globally. This role focuses on enhancing our next-generation two-factor authentication platform, expanding its capabilities and improving its fraud prevention measures. You will be responsible for architecting and delivering robust backend components that power critical verification workflows. The position requires close collaboration with distributed teams to iterate on product requirements and translate business needs into technical specifications. You will contribute to the full lifecycle of software delivery, from initial concept through to production deployment and ongoing optimization. The work involves solving complex technical challenges related to reliability, scalability, and security in a high-availability environment. You will play a key role in ensuring the platform can handle global-scale demands while maintaining strict performance standards.

Key facts

What you'll do

• Develop scalable microservices to support company growth.
• Design and implement cost-effective, maintainable solutions.
• Estimate development effort for new product features.
• Create and execute comprehensive testing strategies, including unit, integration, and end-to-end tests.
• Measure, evaluate, and enhance service quality.
• Participate in code reviews and maintain high code quality standards.
• Document components and design patterns for knowledge sharing.
• Collaborate with product managers and operations to align technical roadmaps with business objectives.
• Troubleshoot production incidents and drive root cause analysis for complex system failures.
• Optimize application performance across the entire verification pipeline.
• Implement security best practices to protect sensitive authentication data.
• Mentor junior engineers and promote engineering excellence within the team.

Requirements

• Proven backend software engineering experience.
• Experience working with cross-functional teams like Engineering, Operations, and Product Management.
• Strong communication skills, able to explain technical concepts to various stakeholders.
• A solid understanding of object-oriented design and common design patterns.
• Significant experience with multi-threaded applications, three-tier architectures, web services, caching, and event-driven systems.
• Experience with SQL and NoSQL databases.
• Practical experience deploying code using tools like Docker, Helm, and Kubernetes.
• Familiarity with Continuous Deployment tools and methodologies.
• Experience working with public cloud environments.

Nice to have

• Experience with AWS.

Skills & tools

• Microservices architecture
• Java, Kotlin, Go
• Spring Boot, Webflux, Reactive programming
• AWS
• Kafka
• Redis, PostgreSQL
• Docker, Kubernetes, Helm
• Grafana, Prometheus, ELK stack

Practical notes

• Benefits include Private Medical Insurance, Group Pension Plan, Life Insurance, Group Personal Accident, Ericsson Care Line (EAP), Discretionary Time Off (DTO), and Volunteer Time (VTO).

This role is part of the Verify API team, where you will work on some of the most critical components of our communication infrastructure. The successful candidate will have a strong passion for writing clean, maintainable, and efficient code. You will be expected to take ownership of your work and see tasks through from initial development to final production rollout. The position demands a high level of discipline and the ability to manage your own schedule in a remote work setting. You will be involved in making architectural decisions that impact the reliability and scalability of our services. The role requires a proactive approach to identifying potential issues before they affect customers.

Because the position is fully remote based in Spain, you will need to be disciplined in managing your time and deliverables without direct supervision. You will work closely with engineers across different time zones, so asynchronous communication and clear documentation are essential. The team values individuals who are eager to learn new technologies and share their knowledge with others. You should be comfortable working in an agile environment where priorities can change based on customer feedback and market demands. The work you do will directly influence the trust customers place in our communication platforms.

The technology stack for this role is modern and cloud-native, requiring familiarity with container orchestration and infrastructure as code practices. You will be responsible for ensuring that the services you build are resilient and can recover quickly from failures. Monitoring and logging will be critical parts of your daily routine, as you will need to diagnose issues quickly and efficiently. The use of Kafka for messaging and Redis for caching will be central to the architecture you will help maintain. You will work with relational and document-based databases to store configuration data and verification records.

This position is ideal for a self-motivated engineer who thrives in a fast-paced environment. You will be expected to contribute to technical design discussions and provide constructive feedback during code reviews. The ability to break down complex problems into manageable tasks is essential for success in this role. You will be responsible for writing tests that ensure the correctness of the authentication logic. The role also involves maintaining up-to-date documentation so that new team members can get up to speed quickly.

The company offers a comprehensive benefits package designed to support work-life balance and professional growth. These benefits include private medical insurance to cover healthcare needs, a group pension plan for long-term financial security, and life insurance for peace of mind. You will also have access to group personal accident coverage and Ericsson Care Line for confidential emotional support. The flexible time off policy allows you to manage your personal responsibilities effectively, while volunteer time off encourages participation in community service. These benefits reflect the company's commitment to supporting its employees in Spain and around the world.