Hiring: Senior Software Engineer - Profiles, Lists and Segments Company: Klaviyo Location: Boston, MA Job Posted Time: 2026-09-17 11:06:39 Target Skills & Keywords : AWS, Aurora, CSS, Cypress, Django, EC2, GraphQL, HTML, JavaScript, MySQL, Python, RDS, REST, RESTful, RabbitMQ, React, Redis, S3, Terraform, TypeScript, User Experience, pytest About the job Experience: •5+ years of experience in full-stack development with strong hands-on skills in React, Redux, JavaScript, HTML, and CSS, along with familiarity with general web best practices. Required Skills: •How You Will Make a Difference •Be a core member of the PLS team, working on impactful customer-facing features that will make our product the best in the industry. •Work on creating easy-to-use editors that are highly performant. •Work closely with Product, Design, and Data Science to provide the best experience for our customers. •Mentor team members and drive initiatives that help the team learn new skills. Qualifications: •Has a track record of delivering and shipping work powered by or accelerated through AI. •You take ownership of your work—from requirements and edge cases to implementation and testing—and are motivated by solving tough problems with others. •Demonstrated success in leading complex, multi-quarter projects involving cross-team collaboration and being accountable for their outcomes •Technologies We Use (not Exhaustive) •Amazon Web Services, Terraform, and other DevOps tools •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 •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. Compensation: •$148,000 - $222,000 / year Interested candidates, please apply directly through the job posting on company's career page or try via AI auto apply on this platform. Don't miss this opportunity to join a forward-thinking team!