Klaviyo · 10 hours ago
Senior Software Engineer, Asynchronous Processing
Boston, MA
Full-time
Hybrid
Senior Level
$148K/yr - $222K/yr
6+ years expKlaviyo is a company that empowers creators to own their own destiny by making first-party data accessible and actionable. They are seeking a Senior Platform Engineer to architect, build, and operate a high-scale, event-driven backbone that supports reliable and low-latency asynchronous workloads for product teams.
E-CommerceBig DataSoftwareAdvertisingMarketingAnalyticsMarketing Automation
Responsibilities
Build a deep understanding of engineering needs across the organization, guiding the design and development of appropriate platform primitives in queueing that align with the platform's vision and practically empower product teams
Design, develop, and deliver software to dramatically improve the availability, scalability, latency, and efficiency of Klaviyo's asynchronous and queueing services
Design and develop systems and processes that enable highly available & scalable systems, with a focus on asynchronous processing
Leverage technology such as Python, Golang, AWS, and Kubernetes to advance Klaviyo's platform, with a deep focus on Apache Pulsar, SQS, and Kafka
Champion best practices by actively collaborating with other teams in a culture that values technical design review
Mentor and pair with other Klaviyo engineers to build better software by focusing on performance, self-healing systems, configuration as code, and defensive programming
Participate in periodic on-call duties with a focus on solving issues when they are discovered, preventing recurrences and minimizing alert fatigue
Qualification
Required
BA or BS Degree in Computer Science, related field, or equivalent experience
6+ years of hands-on software development experience building and operating highly available, full-stack SaaS products at scale, or have demonstrated equivalent proficiency and impact
Independently responsible for the full lifecycle of complex projects or features, including discovery, technical design, implementation, rollout, and ongoing maintenance
Own the operational health of the systems you build, including performance, reliability, and observability
Comfortable defining and upholding SLOs, participating in on-call, and driving follow-through on incidents and RCAs
Familiarity with cloud infrastructure (AWS preferred), infrastructure-as-code (Terraform), and containerized environments (Kubernetes)
Expertise and hands-on experience with asynchronous processing and queueing systems like SQS, Kafka, or Apache Pulsar
Ability to handle yourself and complex systems in outage situations and to drive failures to root cause analysis and prevention of future issues
Passionate about building software effectively and for the long term, balancing technical quality, velocity, and business impact
Excellent communicator and collaborator
Mentor and support other engineers, offering thoughtful feedback in design and code reviews
Enjoy working on small, autonomous, agile teams, shipping early and often
Preferred
Fundamental understanding of Linux and all layers of the networking stack; confident administering and debugging production Linux systems
Practical experience building high availability systems at scale with Apache Pulsar
Benefits
Participation in the company’s annual cash bonus plan
Variable compensation (OTE) for sales and customer success roles
Equity
Sign-on payments
A comprehensive range of health, welfare, and wellbeing benefits based on eligibility
Company
Klaviyo
Klaviyo is an automation and email platform designed to help grow businesses.
1001-5000 employees
H1B Sponsorship
Klaviyo has a track record of offering H1B sponsorships. Please note that this does not
guarantee sponsorship for this specific role. Below presents additional info for your
reference. (Data Powered by US Department of Labor)
Distribution of Different Job Fields Receiving Sponsorship
Represents job field similar to this job
Trends of Total Sponsorships
2025 (47)
2024 (29)
2023 (24)
2022 (27)
2021 (21)
2020 (8)
Funding
Current Stage
Public CompanyTotal Funding
$1.35BKey Investors
ShopifySands Capital VenturesAccel
2025-08-13Post Ipo Secondary· $195.06M
2025-05-14Post Ipo Secondary· $372.95M
2023-09-20IPO
Leadership Team
Andrew Bialecki
CEO
Ed Hallen
Co-Founder, Chief Strategy Officer, Board Member
Recent News
2026-02-12
2026-02-11
Company data provided by crunchbase