Fullstack Engineer II - SMS & RCS (International)

Klaviyo; Greater London; Hybrid; GBP 68,000 - 102,000; Full time

Job summary

Klaviyo is seeking a Fullstack Software Engineer II for the SMS International team within Mobile Platforms. You will join a team of four to deliver RCS and SMS expansion, understanding how new services fit into the broader platform and planning scalable architectures to serve global ecommerce clients.

We build on Python/Django, Go, React and AWS, leveraging AI tools to create impactful customer experiences. Collaboration across teams drives our success and rapid delivery.

Qualifications

• 3-5 years of experience in a software engineering discipline.
• Experience with full stack application development.
• Experience working with both monolithic and microservices architectures.
• Experience working with AI tools to deliver business outcomes.
• Experience with database design that can withstand high query volumes.
• Experience with CI/CD pipelines.
• Experience debugging performance issues and improving application performance.
• An interest and aptitude for collaboration across teams and disciplines.

Responsibilities

• Deliver RCS and SMS International expansion to meet company objectives.
• Build brand new services and understand how they fit into the bigger picture.
• Plan how to architect and scale services to serve our customers.

Skills

Full stack development

Monolithic & microservices

AI tools for business outcomes

Database design

CI/CD pipelines

Performance debugging

Cross-team collaboration

Tools

Claude Code

Python

Django

Go

React

RabbitMQ

Celery

MySQL

DynamoDB

Redis

AWS

Terraform

Kubernetes

Splunk

Buildkite

Grafana

Job description

Klaviyo is seeking a Fullstack Software Engineer II for the SMS International team within Mobile Platforms. You will join a team of four to deliver RCS and SMS expansion, understanding how new services fit into the broader platform and planning scalable architectures to serve global ecommerce clients.

We build on Python/Django, Go, React and AWS, leveraging AI tools to create impactful customer experiences. Collaboration across teams drives our success and rapid delivery.