Senior Software Engineer - Identity and Access Management

About Klaviyo 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.

Klaviyo

Klaviyo is the autonomous CRM for B2C brands, built to turn what you know about your customers into real growth.

K

klaviyo.com

1,001-5,000 employees

Marketing Services

Boston, Massachusetts

2012

Public Company

179k LinkedIn followers

Raised $1.3B

• At Klaviyo, we value the different backgrounds, experiences, and perspectives that each Klaviyo brings to work. If you are close, but not an exact match, we hope you will still apply.

Required

• You have 7+ years of experience building and operating production software.
• You have hands-on experience developing production services in Go or Python.
• You have experience with authentication, authorization, identity, or related security systems.
• You have built networking systems, API gateways, APIs, or SDKs.
• You have led complex projects that spanned multiple engineers and several months.
• You take end-to-end ownership and stay with your work after launch.
• You communicate clearly, work well across teams, and make practical technical decisions.
• You mentor other engineers and raise the quality bar through feedback and example.
• You balance long-term improvements with steady customer delivery.

Preferred

• Experience with auth or policy systems.
• Experience building secure platforms used by other engineering teams.
• Experience with AWS, Terraform, Kubernetes, React, or Django.
• Experience with enterprise security, auditability, data residency, or compliance needs.
• You do not need to know every part of our stack on day one. We care most about strong judgment, ownership, and care for the customer experience.
• 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.
• 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
• $148,000—$222,000 USD
• This role may require up to 10% travel for purposes such as new hire onboarding, client or partner work if applicable, team meetings, and industry events. Travel is coordinated in advance.
• 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.
• AI fluency at Klaviyo includes responsible use of AI (including privacy, security, bias awareness, and human-in-the-loop). We provide accommodations as needed.
• 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.

• Health Insurance
• Wellbeing Benefits
• Annual Cash Bonus Plan
• Equity
• Sign-on Payments