Staff Software Engineer, Backend (Communications Platform)

JOIN VONAGE AND HELP US INNOVATE CLOUD COMMUNICATIONS FOR BUSINESSES WORLDWIDE! ABOUT VONAGE Vonage is the emerging leader in the $100B+ cloud communications platform (CPaaS) market. Customers like Airbnb, Viber, WhatsApp, Snapchat, and many others depend on our APIs and SDKs to connect with their customers all over the world. As businesses continue to shift to a real-time, customer-centric communications model, we are experiencing a time of impressive growth. WHY THIS ROLE MATTERS The RNE (Registration, Numbers and Enablement) group within Vonage's Foundation Engineering department works across four core product domains: Registration, Numbers, Number Intelligence, and Know Your Customer (KYC). As a Staff Engineer, you will be a technical anchor for the team, shaping the architecture of our cloud-native platform and influencing engineering culture across the group. WHAT YOU WILL DO * Provide technical leadership and vision for the design and development of highly concurrent, distributed backend systems; * Drive and own significant architectural decisions, ensuring scalability, reliability and maintainability across the platform; * Lead performance optimisation initiatives and resolve the most complex system-level challenges; * Set the standard for testing practices, including Unit, Integration and Smoke tests, enabling fully automated promotion of code to production; * Define, evolve and enforce coding standards and engineering best practices across the team; * Act as a technical mentor and leader, supporting the growth of engineers at all levels; * Collaborate closely with product and engineering leadership to align technical strategy with business goals; * Provide out-of-hours support as part of an on-call rota. WHAT YOU WILL BRING Essential: * Extensive programming experience in Go (Golang) or deep expertise in JVM technologies (Java/Spring Boot) with a strong commitment to adopting Go; * Extensive, proven experience developing and maintaining enterprise-grade systems at scale; * Deep expertise in highly concurrent, distributed architectures and systems; * Extensive experience leading and owning architectural decisions at team and cross-team level; * Prior experience as a Team Lead or Tech Lead, with a track record of mentoring and growing engineering talent; * Experience with containerised applications and cloud-native infrastructure; * Expert-level performance profiling and optimisation skills; * Deep experience with relational and non-relational databases (e.g. PostgreSQL, Redis); * Exceptional communication and influencing skills, with the ability to align technical and non-technical stakeholders. Nice to Have: * Deep hands-on experience with AWS (SQS, SNS, DynamoDB), Kafka, Kubernetes or Terraform; * Experience driving Continuous Delivery practices in cloud environments; * General understanding of the telecommunications industry. HOW YOU’LL BENEFIT: * Medical Insurance (Allianz) * Life Insurance (Uniqa) * Glasses Reimbursement * Kafeteria (My Benefit) * Discretionary Time Off (DTO) * Volunteer Time (VTO) * Ericsson Care Line #LI-YB1 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 [https://www.vonage.com/legal/careers-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.

Who we are  At Twilio, we’re shaping the future of communications, all from the comfort of our homes. We deliver innovative solutions to hundreds of thousands of businesses and empower millions of developers worldwide to craft personalized customer experiences. Our dedication to remote-first work, and strong culture of connection and global inclusion means that no matter your location, you’re part of a vibrant team with diverse experiences making a global impact each day. As we continue to revolutionize how the world interacts, we’re acquiring new skills and experiences that make work feel truly rewarding. Your career at Twilio is in your hands. We use Artificial Intelligence (AI) to help make our hiring process efficient. That said, every hiring decision is made by real Twilions! . See yourself at Twilio Join the team as Twilio’s next Staff Software Engineer. About the job This position is needed to add to our Voice Connectivity Trust team to enable Twilio to better support our customers using Voice in their solutions. As a Software Engineer on this team you will participate in all phases of the software development life cycle which includes requirements gathering with Product Managers, technical design, estimations, sprint planning, coding, testing, deployments and on-call support. This engineer will own, operate and maintain their teams’ services in a distributed production environment, employing agile methodologies to continuously deliver value to customers. Responsibilities In this role, you’ll: * Be an owner: Design and implement real-time services with high throughput and low latency requirements, verify, deploy and operationalize them * Wear the customer's shoes: Work closely with stakeholders to understand customer needs and, devise and deliver, simple, robust and scalable solutions * Write it down: Be comfortable expressing thoughts and ideas as detailed prose and use it as an effective means to collaborate with leads, architects and cross functional teams * Be bold: Embrace the challenge of scaling a complex distributed platform with points of presence globally, each one concerned with high availability, high reliability, high throughput, low latency, and media fidelity * Draw the owl: Figure out novel ways of solving customer problems for the Voice channel Qualifications  Not all applicants will have skills that match a job description exactly. Twilio values diverse experiences in other industries, and we encourage everyone who meets the required qualifications to apply. While having “desired” qualifications make for a strong candidate, we encourage applicants with alternative experiences to also apply. If your career is just starting or hasn't followed a traditional path, don't let that stop you from considering Twilio. We are always looking for people who will bring something new to the table! *Required: * Minimum 8 years of hands-on experience in a large scale, distributed applications environment on JVM based technologies  * Bachelor's degree in Computer Science or a related engineering field * Strong Computer Science fundamentals not limited to data structures, algorithms, operating systems, and distributed systems * Experience building RESTful services, API design and event-driven architectures (Kafka, SQS) * Hands-on experience designing and driving the optimization of CI/CD pipelines * Experience with on-call rotations, incident response, monitoring/alerting tools (Prometheus, Datadog, Grafana) * Hands-on experience with cloud infrastructures such as AWS, GCP, OpenStack or Azure * Excellent written communication skills - essential for effective AI prompting and for creating clear technical documentation (with or without AI assistance) * Proven ability to critically evaluate AI-generated code for correctness, security, performance, and maintainability * Hands-on Java experience with strong fundamentals, able to architect, review, and debug code whether it's yours, a teammate's, or an AI agent's * Demonstrated proficiency working with AI coding assistants (Claude, GitHub Copilot, Cursor, or similar) - you should be able to describe your workflows and show examples  * Experience scaling data tiers employing a variety of SQL/NoSQL database and caching technologies * Hands on experience scaling production backend systems, with the proven ability to design and develop horizontally-scalable, resilient and performing-under-load systems * Strong team collaborator who is both highly motivated and a motivating influence on peers * Demonstrated technical leadership by driving architectural decisions, leading cross-functional technical initiatives, and actively mentoring team members Desired: * Can demonstrate how you effectively use AI to deliver value efficiently * Knowledge  and experience working with SIP protocol * Knowledge and experience working with Stir/Shaken protocol Location This role will be remote, and based in Ireland. Travel  We prioritize connection and opportunities to build relationships with our customers and each other. For this role, you may be required to travel occasionally to participate in project or team in-person meetings. What We Offer Working at Twilio offers many benefits, including competitive pay, generous time off, ample parental and wellness leave, healthcare, a retirement savings program, and much more. Offerings vary by location. Twilio thinks big. Do you? We like to solve problems, take initiative, pitch in when needed, and are always up for trying new things. That's why we seek out colleagues who embody our values — something we call Twilio Magic. Additionally, we empower employees to build positive change in their communities by supporting their volunteering and donation efforts. So, if you're ready to unleash your full potential, do your best work, and be the best version of yourself, apply now! If this role isn't what you're looking for, please consider other open positions. Twilio is proud to be an equal opportunity employer. We do not discriminate based upon race, religion, color, national origin, sex (including pregnancy, childbirth, reproductive health decisions, or related medical conditions), sexual orientation, gender identity, gender expression, age, status as a protected veteran, status as an individual with a disability, genetic information, political views or activity, or other applicable legally protected characteristics. We also consider qualified applicants with criminal histories, consistent with applicable federal, state and local law. Qualified applicants with arrest or conviction records will be considered for employment in accordance with the Los Angeles County Fair Chance Ordinance for Employers and the California Fair Chance Act. Additionally, Twilio participates in the E-Verify program in certain locations, as required by law.