Senior Software Engineer, Asynchronous Processing

Company: Klaviyo
Location: Boston, United States
Type: onsite
Posted: Aug 21, 2026
Views: 1
django fastapi go kafka protobuf pulsar python sqs

✨ AI Summary

Klaviyo, a marketing automation and customer data platform, is hiring a Senior Software Engineer for asynchronous processing in Boston. This senior-level role focuses on building scalable, event-driven systems and requires deep expertise in distributed systems, message queues, and backend engineering. The tech stack includes Python, Kafka, and AWS, with a preference for candidates having 5+ years of experience. No salary or remote policy is mentioned.

_At Klaviyo, we value the unique backgrounds, experiences and perspectives each Klaviyo (we call ourselves Klaviyos) brings to our workplace each and every day. We believe everyone deserves a fair shot at success and appreciate the experiences each person brings beyond the traditional job requirements. If you’re a close but not exact match with the description, we hope you’ll still consider applying. Want to learn more about life at Klaviyo?…

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About the Company

Name: Klaviyo
Website: https://4dayweek.io

4dayweek.io is a job board dedicated to helping job seekers find roles at companies committed to better work-life balance, including 4-day weeks, 9-day fortnights, flexible schedules, and more. It features thousands of live job listings, company profiles, and resources about reduced-hour work arrangements. The platform also offers an Auto Apply feature (JobCopilot) that automatically applies to matching roles on behalf of users. It is trusted by over 581,000 job seekers and has been featured in Bloomberg, The Guardian, CNBC, Business Insider, and Indeed.

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