Senior Software Engineer- SMS Delivery

About the Team 

The SMS Mobile team at Klaviyo is responsible for empowering the over 250,000 E-commerce clients we work with on a global scale to deliver effective experiences on mobile devices. This team focuses on performance optimization and continuous development of our Mobile Marketing Channels (SMS and Push Notifications), Mobile SDKs (IOS and Android), and Klaviyos own mobile applications. While Email was how Klaviyo began, SMS is truly the way of the future. As a result of this, we put a lot of emphasis around keeping the client experience top of mind while making sure our mobile applications are able to scale at large for many of today's fastest growing brands. 

About the Role 

The SMS Mobile Deliverability team is responsible for making sure that the messages that our clients send get sent through the right platform (Klaviyo), through the correct Carrier (AT&T, Verizon, etc), while also making sure that the message is delivered via the right device (Phone or mobile). In addition to this, there is always an eye towards compliance to make sure that the messages being sent and delivered are legal. Ultimately making sure that from signup to send, the experience is seamless.

How You will make an Impact 

Our Mobile Deliverability team is a newly formed team and works closely with our two other mobile teams which are focused on building long lasting relationships with our clients and their audiences through SMS conversations and deliverability pipeline while keeping an eye on new market opportunities while optimizing our SMS Platform. Incoming members to the Mobile Deliverability Team will be responsible for building the foundation of how we scale internally at Klaviyo. You will have an opportunity to make a major impact on the direction and priorities of the team.

As an engineer on this team, you will be responsible for building and managing Klaviyo’s Customer Facing Mobile Application (with an emphasis on backend development) while also focusing on internal tooling working with various stakeholders across the company.

Technologies we use (not exhaustive):

• Python, Django, React, RabbitMQ, Celery, MySQL, Cassandra, Redis
• Amazon Web Services (EC2, RDS, Aurora, etc.)Terraform, Kuberentes, Splunk, Jenkins, Grafana, and other modern DevOps tools

What we are looking for 

• 5-7+ years of experience in a software engineering discipline
• Significant experience with full stack application development
• Experience working with both monolithic and microservices architectures
• Experience with creating and refactoring databases that can withstand high query volumes
• Experience with CI/CD pipelines
• Experience debugging performance issues and improving application performance
• Proven experience with being a coach and a mentor for team members and helping them grow

Nice to Have

• Experience creating new applications with scalability in mind
• Exposure to large-scale system design
• Experience with AWS or any similar cloud provider