Senior Full Stack Engineer New Product

Klaviyo

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profile Job Location:

Boston, NH - USA

profile Monthly Salary: Not Disclosed
Posted on: 7 hours ago
Vacancies: 1 Vacancy

Job Summary

About the Role

Our team is looking for a Senior Full Stack Engineer to lead key initiatives that will enhance our product offerings and support our companys this role youll play a crucial part in shaping outcomes by developing innovative end-to-end solutions using both front-end and back-end technologies. Youll optimize existing products and create new solutions that redefine whats possible for our customers.

As a Senior Engineer youll tackle complex challenges develop multiple solutions and evaluate business and technical trade-offs to determine the best path forward. Youll also act as a leader and mentor and drive key technology decisions. Additionally youll be responsible for deploying well-designed thoroughly tested solutions that ensure reliability and performance.

The New Products team drives Klaviyos most ambitious innovationscreating and scaling the companys boldest new bets. As a nimble group with a flat structure and fast-moving culture we prioritize simplicity speed and impact. Every team member is expected to take radical ownershiprolling up their sleeves collaborating across disciplines and pushing beyond traditional role boundaries to make things happen. Success in this role means delivering exceptional work that sets the standard for velocity and results company-wide while helping shape Klaviyos future through experimentation creativity and executional excellence.

What Were Looking For

  • A proven track record of building high-quality products and systems with pride in writing clean high-quality code.
  • 7 years of experience in a software engineering role.
  • Strong experience developing end-to-end software solutions or extensive experience with both front-end and back-end technologies.
  • Experience leading projects and being accountable for their outcomes.
  • Experience mentoring team members or driving initiatives that help the team learn new skills.
  • Experience conducting code reviews and running a robust testing cycle.
  • Experience working in agile fast-paced environments.
  • Youve already experimented with AI in work or personal projects and youre excited to dive in and learn fast. Youre hungry to responsibly explore new AI tools and workflows finding ways to make your work smarter and more efficient.
  • Transform workflows by putting AI at the center building smarter systems and ways of working from the ground up.

Nice to Have

  • Skills with Python and related technologies
  • Skills with React and related technologies
  • Experience developing digital marketing or customer data software solutions.
  • Experience with machine learning.
  • Experience building cloud-native solutions ideally with AWS.

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

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Required Experience:

Senior IC

About the RoleOur team is looking for a Senior Full Stack Engineer to lead key initiatives that will enhance our product offerings and support our companys this role youll play a crucial part in shaping outcomes by developing innovative end-to-end solutions using both front-end and back-end technol...
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Key Skills

  • APQP
  • Six Sigma
  • GD&T
  • Root cause Analysis
  • CAD
  • Project Leadership
  • SolidWorks
  • Mechanical Engineering
  • Quality Management
  • Product Development
  • Catia
  • Manufacturing

About Company

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Klaviyo unifies AI-powered email marketing and SMS to drive growth, retention, and measurable results. Build personalized, omnichannel experiences across WhatsApp, ecommerce, and more with K:AI Agents.

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