✦ Luna Orbit — Software Engineering

Software Engineer - SMS International

at Klaviyo

📍 London, UK Onsite Posted March 25, 2026
Type Full-Time
Experience mid
Exp. Years 3-5 years
Education Not specified
Category Software Engineering

Klaviyo is looking for a Fullstack Software Engineer to develop scalable messaging services, focusing on backend performance, cloud infrastructure, and database management.

  • Build and optimize backend services
  • Expand SMS and RCS capabilities
  • Collaborate on system architecture
  • Ensure high performance and scalability
  • Manage cloud infrastructure

The role involves working with Python, Django, AWS, Kubernetes, Terraform, and large-scale database systems to build reliable mobile messaging platforms.

The ideal candidate is a mid-level full stack software engineer with 3+ years experience in Python, Django, AWS, and container orchestration tools like Kubernetes. They should be skilled in performance optimization and large-scale system design.

PythonDjangoAWSDatabase designCI/CD pipelinesPerformance debugging
GoReactTerraformKubernetesDevOps toolslarge-scale system design
AWSTerraformKubernetesSplunkBuildkiteGrafana
PythonDjangoGoReactSQSCeleryMySQLDynamoDBElasticacheRedisAWSTerraformKubernetesDevOps
PythonDjangoGoReactSQSCeleryMySQLDynamoDBElasticacheRedisAWSTerraformKubernetesDevOps
collaborationproblem-solvingcommunicationteamworkperformance optimization
Industry SaaS
Job Function Developing and scaling mobile messaging backend systems
Role Subtype Full Stack Engineer
Tech Domains Amazon Web Services, Kubernetes, Terraform, MySQL, DynamoDB, Elasticache, Redis
Software Engineerfull stackPythonDjangoGoReactAWSDynamoDBMySQLTerraformKubernetesDevOpsCI/CDperformance optimizationsystem designlarge-scale systemsclouddatabase designLondonUKperformance debugging

No experience with AWS or cloud platforms, Lack of database design skills, No CI/CD pipeline experience, Must be based in London, UK

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