Senior Software Engineer - Identity and Access Management

Bostonfull time

On Site

senior

$148k–$222k

H1B: yes

Klaviyo Senior Software Engineer at Klaviyo focusing on Identity and Access Management, leading complex projects and building secure authentication and authorization services. Responsible for improving architecture, defining SLOs, mentoring engineers, and partnering with cross-functional teams.

Responsibilities

Lead business-critical projects from design through launch and long-term operation
Build secure, reliable services for authentication, authorization, delegation, auditing, and revocation
Break ambiguous problems into clear work that several engineers can deliver together
Own the customer impact, reliability, and technical quality of your work in production
Improve the architecture of your area as scale, security, and product needs change
Define and maintain SLOs for the systems that you own
Partner with Security, Product, Platform, and product engineering teams
Create reusable patterns that make IAM easier and safer for other teams to adopt
Mentor engineers and help project contributors succeed
Apply new engineering and AI tools responsibly, then share what you learn with the team
Take on important unowned work that helps the team move faster

Qualification

You have experience with authenticationYou have built networking systemsYou communicate clearlyExperience with auth or policy systemsExperience with AWSExperience with enterprise securityMassachusetts Applicants

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.
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.

Benefits

Equity/RSU
Annual Bonus

Company

Klaviyo

View company page

Source: greenhouse

Active within the past hour

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