Klaviyo

Senior Software Engineer, Asynchronous Processing

Klaviyo
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4 hours ago
Boston, MA, USASenior
H1B Sponsor

Base Salary

$148k - $222k/yr

Responsibilities

  • Design, develop, and operate highly available, scalable, low-latency asynchronous processing and queueing services.
  • Build platform primitives, self-service APIs, and tooling that enable product teams to process data reliably and efficiently.
  • Own system performance, reliability, observability, SLOs, autoscaling, failure isolation, and operational health.
  • Lead the full lifecycle of complex projects and features, including discovery, technical design, implementation, rollout, and maintenance.
  • Collaborate on technical design reviews, RFCs, specifications, and project-level technical direction.
  • Mentor and pair with engineers through design and code reviews and support the development of junior engineers.
  • Participate in periodic on-call duties, incident response, root-cause analysis, and recurrence prevention.
  • Improve performance, self-healing systems, configuration as code, defensive programming, and engineering workflows.

Requirements

  • BA or BS degree in Computer Science, a related field, or equivalent experience.
  • Typically 6+ years of hands-on software development experience building and operating highly available, full-stack SaaS products at scale, or equivalent proficiency and impact.
  • Experience independently owning complex projects or features and providing clear technical direction.
  • Experience owning system performance, reliability, observability, SLOs, on-call operations, incidents, and root-cause analyses.
  • Familiarity with AWS, Terraform, Kubernetes, and reliable service design in containerized cloud environments.
  • Expertise and hands-on experience with asynchronous processing and queueing systems such as SQS, Kafka, or Apache Pulsar.
  • Ability to debug complex production outages and drive failures to root cause and prevention.
  • Strong communication and collaboration skills, including leading technical discussions and writing design documents and RFCs.
  • Experience mentoring engineers and contributing thoughtful feedback in design and code reviews.
  • Experience working on small, autonomous teams and collaborating with product managers, business stakeholders, and engineers.
  • Experience with Linux and all layers of the networking stack, including production administration and debugging, is preferred.
  • Practical experience building highly available systems at scale with Apache Pulsar is preferred.
  • Experience experimenting with AI in work or personal projects and willingness to learn AI tools and workflows.

Benefits

  • Base salary range of $148,000–$222,000 USD, with potential eligibility for annual cash bonus, equity, sign-on payments, and health, welfare, and wellbeing benefits.
  • Boston, Massachusetts location with work authorization and relocation support.
  • Up to 10% travel may be required for onboarding, client or partner work, team meetings, and industry events.
  • Inclusive, collaborative engineering culture with learning and mentorship opportunities.

Tech Stack

Categories

Klaviyo

About Klaviyo

1,001-5,000 employees

Klaviyo (NYSE: KVYO) is the autonomous B2C CRM. Powered by its built-in data platform and AI, Klaviyo combines marketing automation, analytics, and customer service into one unified solution, making it easy for businesses to know their customers and grow faster. Klaviyo (CLAY-vee-oh) helps over 193,000 brands like Mattel, Glossier, Daily Harvest, and Liquid Death deliver 1:1 experiences at scale, improve efficiency, and drive revenue.