Senior Lead Site Reliability Engineer

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? Visit careers.klaviyo.com to see how we empower creators to own their own destiny.
As a Senior Lead Site Reliability Engineer joining the SRE team, you can expect to lead the technical direction and strategy for business-critical areas of the SRE organization. You will lead by example for how we design and evolve the observability strategy and incident management process we use at Klaviyo, including rolling out new patterns and standards and growing the SRE team. You will set direction and roadmap, working across the entire engineering org to do so. Learn more about our engineering culture at https://klaviyo.tech
The SRE team builds foundational backend services, tooling, and automation to allow product teams to scale, monitor, and operate their software reliably and securely. Senior Lead SREs are team players who work across SRE and product teams as needed to advance the architecture and performance of software systems and train their peers in topics such as debugging distributed systems, building self-healing applications and eking out every drop of performance possible.
How You Will Make a Difference

• Provide technical leadership to drive technology choices and architectural decisions across multiple teams and provide solutions for complex problems around platform scalability and best practices
• Design and build platform oriented solutions to Klaviyo engineers' biggest pain points and shared challenges with an eye towards future growth, efficiency, and standardization at scale
• Collaborate with other Senior Leads to create a cohesive technical vision across multiple roadmap items that are built across multiple teams
• Mentor multiple engineers to develop new technical leadership for the company Engineers come to Klaviyo with experience in a variety of languages and from a number of disciplines. All engineers are expected to become extremely proficient in the technologies we use (not exhaustive):
• Python, Django, Celery
• MySQL, RabbitMQ, Redis, Apache Pulsar
• Bash, Puppet, Terraform
• AmazonWeb Services (EC2, RDS, Aurora, etc.), Kubernetes on EKS

Who You Are

• Have 10+ years of experience and have architected, built, and delivered at least one complex system.
• Have multiple years of proven experience building products that matter and pushing yourself and your team to be better engineers and build a product with passionate advocates
• You can build & scale complex distributed systems including solving problems in sustainable ways, balancing pragmatic development with ideal architecture, breaking through technical obstacles with vigor, and leading teams through crises by working side by side with them in the trenches
• You have demonstrated experience successfully navigating the tradeoffs of technical design decisions, risk assessment, and mitigation activities.
• Enjoy shipping code early & often in an agile fashion, pairing with product management to craft better software by soliciting feedback from thousands of end users
• BA or BS Degree in Computer Science, related field, or equivalent experience

We use Covey as part of our hiring and / or promotional process. For jobs or candidates in NYC, certain features may qualify it as an AEDT. As part of the evaluation process we provide Covey with job requirements and candidate submitted applications. We began using Covey Scout for Inbound on April 3, 2025.
Please see the independent bias audit report covering our use of Covey here
Massachusetts Applicants:It is unlawful in Massachusetts to require or administer a lie detector test as a condition of employment or continued employment. An employer who violates this law shall be subject to criminal penalties and civil liability.
Our salary range reflects the cost of labor across various U.S. geographic markets. The range displayed below reflects the minimum and maximum target salaries for the position across all our US locations. The base salary offered for this position is determined by several factors, including the applicant's job-related skills, relevant experience, education or training, and work location.
In addition to base salary, our total compensation package may include participation in the company's annual cash bonus plan, variable compensation (OTE) for sales and customer success roles, equity, sign-on payments, and a comprehensive range of health, welfare, and wellbeing benefits based on eligibility. Please visit Klaviyo Rewards to find out more about our Total Rewards package.
Your recruiter can provide more details about the specific salary/OTE range for your preferred location during the hiring process.
Base Pay Range For US Locations:
$220,000 - $330,000 USD
Get to Know Klaviyo
We're Klaviyo (pronounced clay-vee-oh). We empower creators to own their destiny by making first-party data accessible and actionable like never before. We see limitless potential for the technology we're developing to nurture personalized experiences in ecommerce and beyond. To reach our goals, we need our own crew of remarkable creators-ambitious and collaborative teammates who stay focused on our north star: delighting our customers. If you're ready to do the best work of your career, where you'll be welcomed as your whole self from day one and supported with generous benefits, we hope you'll join us.
Klaviyo is committed to a policy of equal opportunity and non-discrimination. We do not discriminate on the basis of race, ethnicity, citizenship, national origin, color, religion or religious creed, age, sex (including pregnancy), gender identity, sexual orientation, physical or mental disability, veteran or active military status, marital status, criminal record, genetics, retaliation, sexual harassment or any other characteristic protected by applicable law.
IMPORTANT NOTICE: Our company takes the security and privacy of job applicants very seriously. We will never ask for payment, bank details, or personal financial information as part of the application process. All our legitimate job postings can be found on our official career site. Please be cautious of job offers that come from non-company email addresses (@klaviyo.com), instant messaging platforms, or unsolicited calls.
By clicking "Submit Application" you consent to Klaviyo processing your Personal Data in accordance with our Job Applicant Privacy Notice. If you do not wish for Klaviyo to process your Personal Data, please do not submit an application.